Einloggen

Thematische Bibliographien / Silicated

Inhaltsverzeichnis

Zeitschriftenartikel
Dissertationen
Bücher
Buchteile
Konferenzberichte
Berichte der Organisationen

Auswahl der wissenschaftlichen Literatur zum Thema „Silicated“

Autor: Grafiati

Veröffentlicht am 25. Mai 2024

Geben Sie eine Quelle nach APA, MLA, Chicago, Harvard und anderen Zitierweisen an

Wählen Sie eine Art der Quelle aus:

Machen Sie sich mit den Listen der aktuellen Artikel, Bücher, Dissertationen, Berichten und anderer wissenschaftlichen Quellen zum Thema "Silicated" bekannt.

Neben jedem Werk im Literaturverzeichnis ist die Option "Zur Bibliographie hinzufügen" verfügbar. Nutzen Sie sie, wird Ihre bibliographische Angabe des gewählten Werkes nach der nötigen Zitierweise (APA, MLA, Harvard, Chicago, Vancouver usw.) automatisch gestaltet.

Sie können auch den vollen Text der wissenschaftlichen Publikation im PDF-Format herunterladen und eine Online-Annotation der Arbeit lesen, wenn die relevanten Parameter in den Metadaten verfügbar sind.

Zeitschriftenartikel zum Thema "Silicated"

1

Labjar, Houda, und Hassan Chaair. „Synthesis and characterization of apatite silicated powders with wet precipitation method“. E3S Web of Conferences 234 (2021): 00106. http://dx.doi.org/10.1051/e3sconf/202123400106.

Der volle Inhalt der Quelle

Annotation:

The synthesis of apatite silicated Ca10(PO4)6-x(SiO4)x(OH)2-x (SiHA) with 0≤x≤2 was investigated using a wet precipitation method followed by heat treatment using calcium carbonate CaCO3 and phosphoric acid H3PO4 and silicon tetraacetate SiC8H20O4 (TEOS) in medium of water ethanol, with three different silicate concentrations. After drying, the samples are ground and then characterized by different analytical techniques like X-ray Diffraction (XRD), Fourier Transform Infrared Spectroscopy (FTIR) and Scanning electron Microscopy (SEM) and chemical analysis.

APA, Harvard, Vancouver, ISO und andere Zitierweisen

2

Yi, Li, Gianguido Ramis, Guido Busca und Vincenzo Lorenzelli. „Characterization of silicated anatase powders“. Journal of Materials Chemistry 4, Nr. 11 (1994): 1755. http://dx.doi.org/10.1039/jm9940401755.

Der volle Inhalt der Quelle

APA, Harvard, Vancouver, ISO und andere Zitierweisen

3

Kostanovskiy, A. V., M. G. Zeodinov, M. E. Kostanovskaya und A. A. Pronkin. „Electrical Resistivity of Silicated Silicon Carbide“. High Temperature 56, Nr. 5 (September 2018): 824–26. http://dx.doi.org/10.1134/s0018151x18050152.

Der volle Inhalt der Quelle

APA, Harvard, Vancouver, ISO und andere Zitierweisen

4

YI, L., G. RAMIS, G. BUSCA und V. LORENZELLI. „ChemInform Abstract: Characterization of Silicated Anatase Powders.“ ChemInform 26, Nr. 10 (18.08.2010): no. http://dx.doi.org/10.1002/chin.199510016.

Der volle Inhalt der Quelle

APA, Harvard, Vancouver, ISO und andere Zitierweisen

5

Rubtsov, A. V., D. N. Shermatov, A. I. Khabibullin, U. Yu Strokina und T. D. Batyrgareev. „Formation of silicated layer of austenitic pipe steel with different pipe sizes“. Journal of Physics: Conference Series 2373, Nr. 2 (01.12.2022): 022069. http://dx.doi.org/10.1088/1742-6596/2373/2/022069.

Der volle Inhalt der Quelle

Annotation:

Abstract Tubular furnaces of hazardous production facilities are unique technical devices, and serve for open fire heating of various process media to relatively high temperatures. Some of the furnaces, such as pyrolysis furnaces, hydrogen conversions are also reactors that serve to decompose the hydrocarbon feedstock into separate components. The most important element of the structure is a tubular coil. The effect of high temperatures and working media on the coil metal inevitably leads to metal degradation by forming various defects, changing the structure and mechanical properties for the worse. One of the most unfavorable moments is considered saturation of the surface layers of the metal with carbon or another - carburization of the metal. When the metal is carburized, its embrittlement occurs and the probability of brittle destruction increases. All this can lead to frequent shutdown of furnaces for repairs and significant costs. One way to contain the active diffusion of carbon into the metal may be to silicate the surface of the coil elements using different silicating mixtures, since silicon can effectively delay carbon incorporation. In this work, studies are carried out on the peculiarities of the formation of a silicated layer in fragments of pipes with dimensions of 160x6 mm, 32x2 mm, 57x4 mm made of steel 08Kh18N10T depending on the holding time in the silicating mixture.

APA, Harvard, Vancouver, ISO und andere Zitierweisen

6

Holt, Stephen A., Philip A. Reynolds und John W. White. „Growth of silicated films at the solid/liquid interface“. Physical Chemistry Chemical Physics 2, Nr. 24 (2000): 5667–71. http://dx.doi.org/10.1039/b007606f.

Der volle Inhalt der Quelle

APA, Harvard, Vancouver, ISO und andere Zitierweisen

7

Bouregba, Adil, und Adeljebbar Diouri. „Silicocarnotite Synthesis and Bioactivity in Artificial Saliva Medium“. Journal of Biomimetics, Biomaterials and Biomedical Engineering 38 (August 2018): 38–46. http://dx.doi.org/10.4028/www.scientific.net/jbbbe.38.38.

Der volle Inhalt der Quelle

Annotation:

The aim of this study is the synthesis and investigation of bioactive response of acrystalline silicophosphate.A monophasic silicocarnotite was elaborated by solid state reaction from a mixture of beta-tricaliciumphosphate and dicalcium silicate based on mussel shells according to the diagram of system Ca3(PO4)2–Ca2SiO4, at 65 % and 35% respectively , these starting materials are heated up to 1450 °C to obtain a monophasic silicocaronitite. The obtained result probed that the main crystalline phase which was detected and recognized in the heated sample at 1400 and 1450 °C was a well-crystallized silicocarnotite. The test of bioactivity of silicocarnotite in artificial saliva causes the appearance of a reaction layer on the materials surface after 4 hours soaking and growth up during 30 days.This layer is constituted of a biphasic mixture of Si–Ca–P–H material, silicated hydroxyapatite and hydroxyapatite phase are the mainly developing ones with increasing soaking time.The analysis and characterization of the precipitated appearing on the material surface has confirmed experimentally the in vitro bioactivity of silicocarnotite monophasic material.

APA, Harvard, Vancouver, ISO und andere Zitierweisen

8

Palard, Mickael, J. Combes, Eric Champion und Didier Bernache-Assollant. „Preparation and Biological Evaluation of Si-Substituted HA Ceramics with Controlled Composition“. Key Engineering Materials 361-363 (November 2007): 1059–62. http://dx.doi.org/10.4028/www.scientific.net/kem.361-363.1059.

Der volle Inhalt der Quelle

Annotation:

This work aimed at preparing dense and monophasic silicated hydroxyapatite ceramics over the range 0 ≤ x ≤ 1.0 mol of silicon. The synthesis of the powder via an aqueous precipitation process followed by an adapted thermal treatment showed that it was possible to obtain dense single-phased apatite ceramics containing up to 0.6 mol of silicon. The in vitro biological characterization of these materials was performed.

APA, Harvard, Vancouver, ISO und andere Zitierweisen

9

Xiao, Yong Feng, Bao Dong Wang, Xiao Ting Liu, Xiao Huan Wang, Li Jun Zhao, Geng Zhi Yu und Qi Sun. „Mechanism and Kinetics Study of Sintering Process for Alumina Recovery from Fly Ash“. Advanced Materials Research 955-959 (Juni 2014): 2824–30. http://dx.doi.org/10.4028/www.scientific.net/amr.955-959.2824.

Der volle Inhalt der Quelle

Annotation:

In this paper, the de-silicated fly ash (DSFA) was sintered with soda and calcium oxide. Detailed analysis and characterization was carried out by using thermal gravimetric analysis (TGA) and X-ray diffraction (XRD). Two dominant reactions take place in the sintering process. The kinetics was studied by using Jander mode, and the sintering activation energies were determined based on the weight loss of CO2.

APA, Harvard, Vancouver, ISO und andere Zitierweisen

10

Staroszczyk, Hanna, und Piotr Janas. „Microwave-assisted preparation of potato starch silicated with silicic acid“. Carbohydrate Polymers 81, Nr. 3 (Juli 2010): 599–606. http://dx.doi.org/10.1016/j.carbpol.2010.03.017.

Der volle Inhalt der Quelle

APA, Harvard, Vancouver, ISO und andere Zitierweisen

Mehr Quellen

Dissertationen zum Thema "Silicated"

1

Conway, Jordan C. „Highly silicated hydroxyapatite : synthesis, characterisation and evaluation“. Thesis, University of Aberdeen, 2017. http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?pid=235581.

Der volle Inhalt der Quelle

APA, Harvard, Vancouver, ISO und andere Zitierweisen

2

Hjezi, Zahi. „Biocéramiques phosphocalciques fonctionnalisées : étude de la silanisation de surface“. Thesis, Limoges, 2015. http://www.theses.fr/2015LIMO0117/document.

Der volle Inhalt der Quelle

Annotation:

L’hydroxyapatite phosphocalcique (HA) est largement utilisée en tant que substitut osseux. Sa composition chimique est proche de celle du minéral osseux ce qui en fait une céramique ostéoconductrice. Les hydroxyapatites silicatées (SiHA) sont actuellement étudiées. La présence de silicium au sein de la structure apatite pourrait accroître la bioactivité des implants. Cependant, ces substituts ne sont pas ostéoinducteurs. Ils n'ont pas la capacité d'induire la formation de tissus osseux, ce qui limite leur utilisation en chirurgie réparatrice. L'une des stratégies envisagées afin de les rendre ostéoinducteurs est de fonctionnaliser leur surface par des molécules biologiquement actives via des organosilanes. L’objectif de ce travail est d'étudier l’influence de l’incorporation du silicium dans l’hydroxyapatite et de la fonctionnalité (i.e. nombre de groupements hydrolysables) des amino-éthoxy-silanes sur le mode de greffage et la quantité de molécules à la surface des substrats. Les céramiques HA et SiHA silanisées ont été élaborés et caractérisées par spectroscopie de photoélectrons X et par analyse thermogravimétrique couplée à la spectrométrie de la masse. Les résultats ont confirmé un greffage covalent quelles que soient la nature du substrat et la fonctionnalité de l'organosilane. La quantité greffée augmente avec la fonctionnalité de l’organosilane. La présence de silicium au sein du substrat favorise le nombre de chaines éthoxyles impliquées dans la réaction d’hétérocondensation et diminue la quantité d’organosilanes greffée. Les organosilanes sont répartis d’une façon non homogène sur la surface mais sans formation d’une couche recouvrant celle-ci en totalité
Calcium phosphate hydroxyapatite (HA) is widely used as bone substitute. Its chemical composition is close to the mineral part of bone which induces osteoconductive ceramics. Silicated hydroxyapatites (SiHA) are being studied. The incorporation of silicon in the hydroxyapatite structure would increase the bioactivity of the implant. However, these substitutes are not osteoinductive. They do not have the ability to induce bone formation which limits their use in reparative surgery. In order to obtain osteoinductive ceramics, it is possible to functionalize their surface by biologically active molecules via organosilanes. The present work studies the influence of silicon incorporation in the hydroxyapatite structure and the functionality (i.e. number of hydrolysable groups) of amino-ethoxy-silanes on the grafting mode and the quantity of molecules at the substrates surface. HA and SiHA silanised ceramics have been produced and characterized by means of X-ray photoelectron spectroscopy and thermogravimetric analysis coupled with mass spectrometry. The results confirmed the covalent grafting whatever the nature of the substrate and the functionality of the organosilane might be. The grafted amount increases with the functionality of organosilane. Moreover, the presence of silicon within the substrate promotes the number of ethoxyl chains involved in the heterocondensation reaction and decreases the grafted amount of organosilanes. The organosilanes are not homogeneously distributed on the surface but without formation of a layer covering the entire surface

APA, Harvard, Vancouver, ISO und andere Zitierweisen

3

Villanova, de Benavent Cristina. „Compositional and structural characterisation of Ni-phyllosilicates in hydrous silicate type Ni-laterite deposits“. Doctoral thesis, Universitat de Barcelona, 2015. http://hdl.handle.net/10803/396616.

Der volle Inhalt der Quelle

Annotation:

Ni-bearing Mg-phyllosilicates (commonly known as garnierites) are significant ore minerals in many Ni-laterite deposits worldwide. However, the characterisation of these mineral phases is complex, as well as their classification and nomenclature, due to their fine-grained nature, low crystallinity and frequent occurrence as mixtures. The aim of this study is to shed some light to the nature of the Ni-bearing Mg-phyllosilicates occurring at the Falcondo Ni-laterite. In this deposit, these minerals are found within the saprolite horizon mainly as fracture-fillings, coatings on joints and as breccias. The Falcondo garnierites display easily distinguishable different shades of green and characteristic textures, which correspond to different mineral phases. Five garnierite types were defined by X-ray diffraction (XRD), optical and electron microscopy, and electron microprobe (EMP) analyses: I) Ni-Fe-bearing serpentine-like, II) Ni-(Al)-bearing serpentine-like with minor talc-like, III) Ni-rich mixture of serpentine- and talc-like, IV) talc-like and V) sepiolite-falcondoite. The characterisation was completed with differential thermal analysis and thermogravimetry (DTA-TG), transmission electron microscopy (TEM), Raman spectroscopy, microfocus X-ray absorption spectroscopy (i.tXAS) and dissolution experiments, in order to gain further insight on these mineral phases from different points of view. EMP oxide totals and DTA-TG indicate that talc-like contain higher H2O than talc sensu stricto (about 4.5% mass loss at 200°C, and up to 5% at 650°C), and therefore the names kerolite-pimelite [(Mg,Ni)3Si4010(OH)2• nH20] should be used instead of talc-willemseite [(Mg,1•103Si401o(OH)21. Compositional data showed continuous Mg-Ni solid solution along the joins lizardite-nepouite/chrysotile-pecoraite (serpentine-like), kerolite-pimelite (talc-like) and sepiolite-falcondoite. The phases with larger amounts of talc-like displayed the highest Ni contents (up to 2.2 apfu out of 3 octahedral atoms). In addition, EMP analyses of the mixed phases showed deviations from the stoichiometric Mg-Ni solid solutions of serpentine and talc. This is best explained by mixing at the nanoscale, which was confirmed by XRD and high resolution TEM imaging. Furthermore, a detailed textural study by means of EMP quantified X-ray element imaging was used to explain the relationships between textural position, sequence of crystallization and mineral composition of the studied Ni-phyllosilicates. These results indicate several stages of growth with variable Ni content, pointing to recurrent changes in the physical-chemical conditions during the precipitation of the different Ni-phyllosilicates. HRTEM and low magnification imaging enabled to measure the characteristic basal spacings of these phyllosilicates and to observe a wide variety of nanotextures, respectively: 15-sectored polygonal serpentine, chrysotile tubes, lizardite lamellae, kerolite-pimelite lamellae and sepiolite ribbons. In accordance with EMP results, chemical analyses by TEM showed that Ni is more concentrated in the kerolite-pimelite lamellae than in the serpentine particles. In addition, the HRTEM revealed that kerolite-pimelite lamellae replace the Ni-poor serpentine particles. These observations evidence the processes of progressive Ni-enrichment within some Ni-bearing Mg-phyllosilicates. Characteristic Raman bands were observed for serpentine-, talc- and sepiolite-like phases, and therefore this technique allowed discriminating the different garnierite types. The synchtrotron radiation-based µXAS analyses were conducted to investigate the speciation of Fe (by Fe K-edge X-ray absorption near edge structure, XANES) and the local environment of Ni (by Ni K-edge extended X-ray absorption fine structure, EXAFS). The XANES results indicate that Fe in the weathered saprolite and in the garnierites is mostly oxidised, whereas in the primary serpentine from the ultramafic protolith it is in the ferrous form. The EXAFS spectra indicate that Ni is homogeneously distributed in the unweathered rock, and is accumulated in discrete domains (clusters) in the weathered saprolite and in all the garnierite types. Finally, the dissolution experiments of a set of garnierites which cover a wide range of mineral compositions at acidic pH suggest that the dissolution rates are faster in serpentine- dominated garnierites than in talc (kerolite)-dominated garnierites or sepiolite-falcondoite, and that the dissolution is not congruent, being the serpentine component the first to dissolve in the garnierite mixtures of serpentine and talc (kerolite). In summary, the various analytical techniques applied to the garnierites of this study provide an accurate outlook of their complex mineralogy, structures, textures and chemistry at different scales that provides further details on the formation of these Ni-bearing Mg- phyllosilicates in a lateritic environment.
Els fil- losilicats de níquel (comunament anomenats "garnierites") són importants menes en molts jaciments laterítics de Ni del món. La seva caracterització, classificació i nomenclatura és complexa, ja que normalment es troben en forma de mescles íntimes de diferents fil- losilicats de gra molt fi i baixa cristal• linitat. L'objectiu d' aquesta tesi és avançar en el coneixement de la mineralogia dels fil- losilicats de Ni del dipòsit de laterites niquelíferes de Falcondo, a la República Dominicana, per mitjà de l'ús d'un ampli espectre de tècniques analítiques: difracció de pols de raig X, anàlisi tèrmica diferencial i termogravimetria, microscòpia òptica, microscòpia electrònica de rastreig, microsonda electrònica, microscòpia electrònica de transmissió, espectroscòpia Raman, espectroscòpia d' absorció de raigs X (EXAFS i XANES, amb radiació sincrotró) i per mitjà d'experiments de dissolució. Les garnierites de Falcondo es localitzen a la part baixa de l'horitzó saprolftic en forma de rebliment de fractures i vetes, i ciments i clasts en bretxes. Els principals resultats indiquen que hi ha cinc tipus de garnierites, segons el seu color, la seva mineralogia i la química mineral. La majoria són barreges de serpentina i talc hidratat (kerolita-pimelita), tot i que també hi ha fases de la sèrie sepiolita-falcondoita. La fase que concentra més Ni és la kerolita-pimelita, mentre que a la serpentina el Ni és sistemàticament molt baix i a la sepiolita-falcondoita és molt variable. Les imatges d' alta resolució obtingudes amb microscopi electrònic de transmissió indiquen que els fil- losilicats que componen les garnierites formen una gran varietat de textures: serpentina poligonal, tubs de crisòtil, lamel• les de lizardita, lamel• les de talc hidratat i cintes de sepiolita. A més, s'ha observat que la kerolita-pimelita (rica en Ni) reemplaça sistemàticament la serpentina (pobra en Ni). L'espectroscòpia Raman permet distingir els cinc tipus descrits de garnierites i per tant, s'ofereix com una tècnica ràpida, senzilla i no destructiva per analitzar aquest tipus de minerals al camp. L' absorció de raigs X per mitjà de radiació sincrotró ha permès identificar que tot el Fe contingut en les garnierites i en les serpentines de la saprolita està en forma de Fe3+, i que tot el Ni es troba acumulat formant clusters, i no pas en forma de solució sòlida homogènia, a la capa octaèdrica. Finalment, els experiments de dissolució suggereixen que les velocitats de dissolució són més ràpides en les garnierites que contenen molta serpentina, i que la dissolució no és congruent, sent el Mg el primer element en ser posat en solució, seguit del Si i del Ni.

APA, Harvard, Vancouver, ISO und andere Zitierweisen

4

Rogers, Jennifer Roberts. „Nutrient-driven colonization and weathering of silicates /“. Full text (PDF) from UMI/Dissertation Abstracts International, 2000. http://wwwlib.umi.com/cr/utexas/fullcit?p3004368.

Der volle Inhalt der Quelle

APA, Harvard, Vancouver, ISO und andere Zitierweisen

5

Boyer, Antoine. „Synthèse, caractérisation et évaluation biologique d'apatites phosphocalciques carbo silicatées“. Phd thesis, Ecole Nationale Supérieure des Mines de Saint-Etienne, 2014. http://tel.archives-ouvertes.fr/tel-01068540.

Der volle Inhalt der Quelle

Annotation:

La substitution ionique apparait comme une des possibilités pour moduler la bioactivité de l'hydroxyapatite (HA), matériau couramment employé comme substitut osseux. L'incorporation simultanée d'ions carbonates et silicates dans la structure apatitique pourrait permettre de coupler les propriétés de résorption et de dissolution des apatites carbonatées avec le rôle métabolique important du silicium dans le tissu conjonctif.Des poudres d'hydroxyapatites phosphocalciques substituées en carbonates et en silicates de formule Ca10 x+y(PO4)6-x-y(CO3)x(SiO4)y(OH)2-x+y (avec 0 ≤ y ≤ x ≤ 2 et x+y ≤ 2, C Si HA), ont été synthétisées par précipitation en milieu aqueux. L'originalité de cette synthèse réside essentiellement dans l'emploi de réactifs parfaitement solubles et miscibles dans l'eau. L'incorporation des carbonates et des silicates en substitution des phosphates a lieu dès la précipitation. Les poudres obtenues sont monophasiques, cristallines et de structure apatitique.Les caractérisations physico-chimiques des poudres ont mis en évidence l'existence d'interactions entre les carbonates (A et B) et les silicates au sein de la maille apatitique. La décarbonatation des sites B, synonyme de décomposition de la phase C-Si-HA, a pu être décalée à de plus hautes températures avec l'emploi du CO2 comme atmosphère de calcination. Le frittage de céramiques denses et monophasiques en C Si HA destinée à une première évaluation biologique a donc été possible. La culture in vitro de cellules souches mésenchymateuses C3H10T1/2 à la surface de céramiques de composition C0,8 Si0,4 HA a mis en évidence leur biocompatibilité et des propriétés ostéoconductives équivalentes à celles de l'HA.

APA, Harvard, Vancouver, ISO und andere Zitierweisen

6

Azenha, Marcelo Rodrigues [UNESP]. „Reparação óssea em alvéolos de ratas ovarectomizadas após implante com biovidro: análise histomorfométrica e imunoistoquímica“. Universidade Estadual Paulista (UNESP), 2013. http://hdl.handle.net/11449/123378.

Der volle Inhalt der Quelle

Annotation:

Made available in DSpace on 2015-05-14T16:53:29Z (GMT). No. of bitstreams: 0 Previous issue date: 2013-09-09Bitstream added on 2015-05-14T16:58:45Z : No. of bitstreams: 1 000821898.pdf: 1301763 bytes, checksum: d28b4fd5d34abcdbe6e39a7e3297aee3 (MD5)
Objetivos: Avaliar o processo de reparo alveolar em ratas ovarectomizadas após implante com Biosilicato cristalino. Materiais e Métodos: Sessenta ratas foram divididas em quatro grupos (n = 15) de acordo com o tratamento: Grupo 1- ratas submetidas à cirurgia sham com alvéolos preenchidos com coágulo; Grupo 2-ratas submetidas à cirurgia sham com alvéolos preenchidos com Biosilicato cristalino; Grupo 3-ratas ovarectomizadas com alvéolos preenchidos com coágulo; e Grupo 4- ratas ovarectomizadas com alvéolos preenchidos com Biosilicato cristalino. Após 7, 14 e 28 dias os animais foram sacrificados e análises histomorfométricas (histologia e histometria) e imunoistoquímicas (Osteopontina e Osteocalcina) foram realizadas. A comparação dos resultados foi realizada utilizando o programa estatístico Assistat 2013 para Windows através da Análise de Variância e teste de Mann-Whitney, com resultados significantes sendo encontrados quando p≤0.05. Resultados: No período de 7 dias, os Grupos 1 e 3 apresentaram resultados superiores e estatisticamente maiores do que os Grupos 2 e 4 (p<0.05) quanto à formação óssea. Após o período de 14 dias as diferenças estatísticas mantiveram-se, com os Grupos 1 e 3 apresentando diferença estatisticamente significante maiores aos Grupos 2 e 4 (p<0.05). Aos 28 dias, a diferença estatística significativa permaneceu entre os mesmo Grupos estudados, sendo que nos grupos implantados com o Biosilicato cerca de 60% do alvéolo já havia sido preenchido por osso novo. A imunoistoquímica revelou expressão das proteínas Osteocalcina e Osteopontina, principalmente nos animais submetidos à cirurgia de ovarectomia. Conclusões: Os Grupos 1 e 3 foram os que apresentaram os melhores resultados durante todo o estudo, com o Biosilicato cristalino apresentando resultado favorável na reparação...
Objectives: To evaluate the process of alveolar repair in ovariectomized rats after implantation with Biosilicate. Materials and Methods: Sixty rats were divided into four groups (n = 15) according to treatment: Group 1 - rats underwent sham surgery with alveoli filled with blood clot; Group 2 - rats underwent sham surgery with alveoli filled with crystalline Biosilicate; Group 3 - ovariectomized rats with alveoli filled with blood clot; Group 4 - ovariectomized rats with alveoli filled with crystalline Biosilicate. After 7, 14 and 28 days the animals were sacrificed and histomorphometric analysis (histology and histometric) and immunohistochemical (Osteopontin and Osteocalcin) were measured . The comparison of the results was performed using the statistical program Assistat 2013 for Windows by Analysis of Variance and Mann-Whitney tests, with significant results being found when p ≤ 0:05 . Results: During the 7- day period, Groups 1 and 3 showed better and significantly higher results in bone formation than Groups 2 and 4 (p<0.05). After 14 days the statistical differences remained between Groups 1 and 3 and Groups 2 and 4 (p<0,05). At 28 days, the statically difference remained significant between the same Groups, while the groups implanted with Biosilicate presented about 60% of the socket filled by new bone. Immunohistochemistry revealed expression of proteins osteocalcin and osteopontin, especially in animals subjected to ovariectomy surgery. Conclusions: Groups 1 and 3 were those with the best results throughout the study, with the crystalline Biosilicate presenting favorable result in bone repair without bioglass resorption. The immunohistochemical analysis showed that animals subjected to ovariectomy had a higher signaling in Ostecalcina and Osteopontin proteins

APA, Harvard, Vancouver, ISO und andere Zitierweisen

7

Azenha, Marcelo Rodrigues. „Reparação óssea em alvéolos de ratas ovarectomizadas após implante com biovidro : análise histomorfométrica e imunoistoquímica /“. Araçatuba, 2013. http://hdl.handle.net/11449/123378.

Der volle Inhalt der Quelle

Annotation:

Orientador: Osvaldo Magro Filho
Banca: Celso Kooji Sonoda
Banca: Sonia Regina Panzarini Barioni
Banca: Luiz Guilherme Brentegani
Banca: Osny Ferreira Júnior
Resumo: Objetivos: Avaliar o processo de reparo alveolar em ratas ovarectomizadas após implante com Biosilicato cristalino. Materiais e Métodos: Sessenta ratas foram divididas em quatro grupos (n = 15) de acordo com o tratamento: Grupo 1- ratas submetidas à cirurgia sham com alvéolos preenchidos com coágulo; Grupo 2-ratas submetidas à cirurgia sham com alvéolos preenchidos com Biosilicato cristalino; Grupo 3-ratas ovarectomizadas com alvéolos preenchidos com coágulo; e Grupo 4- ratas ovarectomizadas com alvéolos preenchidos com Biosilicato cristalino. Após 7, 14 e 28 dias os animais foram sacrificados e análises histomorfométricas (histologia e histometria) e imunoistoquímicas (Osteopontina e Osteocalcina) foram realizadas. A comparação dos resultados foi realizada utilizando o programa estatístico Assistat 2013 para Windows através da Análise de Variância e teste de Mann-Whitney, com resultados significantes sendo encontrados quando p≤0.05. Resultados: No período de 7 dias, os Grupos 1 e 3 apresentaram resultados superiores e estatisticamente maiores do que os Grupos 2 e 4 (p<0.05) quanto à formação óssea. Após o período de 14 dias as diferenças estatísticas mantiveram-se, com os Grupos 1 e 3 apresentando diferença estatisticamente significante maiores aos Grupos 2 e 4 (p<0.05). Aos 28 dias, a diferença estatística significativa permaneceu entre os mesmo Grupos estudados, sendo que nos grupos implantados com o Biosilicato cerca de 60% do alvéolo já havia sido preenchido por osso novo. A imunoistoquímica revelou expressão das proteínas Osteocalcina e Osteopontina, principalmente nos animais submetidos à cirurgia de ovarectomia. Conclusões: Os Grupos 1 e 3 foram os que apresentaram os melhores resultados durante todo o estudo, com o Biosilicato cristalino apresentando resultado favorável na reparação...
Abstract: Objectives: To evaluate the process of alveolar repair in ovariectomized rats after implantation with Biosilicate. Materials and Methods: Sixty rats were divided into four groups (n = 15) according to treatment: Group 1 - rats underwent sham surgery with alveoli filled with blood clot; Group 2 - rats underwent sham surgery with alveoli filled with crystalline Biosilicate; Group 3 - ovariectomized rats with alveoli filled with blood clot; Group 4 - ovariectomized rats with alveoli filled with crystalline Biosilicate. After 7, 14 and 28 days the animals were sacrificed and histomorphometric analysis (histology and histometric) and immunohistochemical (Osteopontin and Osteocalcin) were measured . The comparison of the results was performed using the statistical program Assistat 2013 for Windows by Analysis of Variance and Mann-Whitney tests, with significant results being found when p ≤ 0:05 . Results: During the 7- day period, Groups 1 and 3 showed better and significantly higher results in bone formation than Groups 2 and 4 (p<0.05). After 14 days the statistical differences remained between Groups 1 and 3 and Groups 2 and 4 (p<0,05). At 28 days, the statically difference remained significant between the same Groups, while the groups implanted with Biosilicate presented about 60% of the socket filled by new bone. Immunohistochemistry revealed expression of proteins osteocalcin and osteopontin, especially in animals subjected to ovariectomy surgery. Conclusions: Groups 1 and 3 were those with the best results throughout the study, with the crystalline Biosilicate presenting favorable result in bone repair without bioglass resorption. The immunohistochemical analysis showed that animals subjected to ovariectomy had a higher signaling in Ostecalcina and Osteopontin proteins
Doutor

APA, Harvard, Vancouver, ISO und andere Zitierweisen

8

Claireaux, Corinne. „Mobilité atomique dans les silicates vitreux et fondus“. Thesis, Paris 6, 2014. http://www.theses.fr/2014PA066401/document.

Der volle Inhalt der Quelle

Annotation:

Cette thèse traite de la diffusion couplée dans un système verrier industriel contenant quatre oxydes (SiO2, Al2O3, CaO, Na2O). La gamme de températures considérée s’étend de la transition vitreuse (650°C) au liquidus (1200°C). Les premiers résultats concernent la nature macroscopique de la diffusion. La matrice des coefficients de diffusion permet de quantifier la mobilité des composants et met en évidence de nombreuses interactions entre eux. D’autres informations sont obtenues à l’échelle microscopique. Les équations d’échanges synthétisent les principaux chemins de diffusion suivis au sein du système sous la forme de réactions. L’ensemble des données de la littérature est traité et semble converger vers des chemins de diffusion préférentiels. Des hypothèses sur les mécanismes de la diffusion des espèces sont proposées. Les résultats obtenus à basse température permettent de discuter les liens entre propriétés de transport et diffusion. L’étude de la structure du matériau s’est appuyée sur la spectroscopie Raman. Les expériences de diffusion donnent accès à un grand nombre de compositions verrières, permettant ainsi de développer un outil statistique de traitement des spectres. Les composantes spectrales ainsi obtenues sont discutées à la lumière des nombreuses observations décrites dans la littérature. Cette démarche permet également d’interpréter les composantes au travers des corrélations entre leurs intensités relatives et la composition du matériau ainsi qu’en étudiant leur évolution le long des profils de diffusion. La possibilité de faire de la spectroscopie Raman une technique de quantification des espèces est discutée
This manuscript deals with the coupled diffusion in an industrial glass system containing four oxides (SiO2, Al2O3, CaO, Na2O). The temperature range extends from the glass transition temperature (650°C) to the liquidus (1200°C). The first results concern the macroscopic nature of diffusion. The matrix containing the diffusion coefficients quantifies the mobility of the components and highlights many interactions between them. Other information can be obtained at the microscopic scale. The exchange equations summarize the main diffusion paths followed by the system in reactions form. All the data from the literature are processed and they seem to converge towards preferential diffusion paths. Hypothesis about the mechanisms of diffusion of the species are proposed. The results obtained at low temperatures open a discussion of the relationship between transport properties and diffusion. The study of the structure of the material was based on Raman spectroscopy. Diffusion experiments provide a large number of glass compositions, which allowed us to develop a statistical tool for handling spectra. The spectral components thus obtained are discussed in the light of the many observations described in the literature. This approach allowed us to interpret the components through correlations between their relative intensities and the composition of the material and by studying their evolution along the diffusion profiles. The possibility of a Raman spectroscopy technique for quantifying species is discussed

APA, Harvard, Vancouver, ISO und andere Zitierweisen

9

Claireaux, Corinne. „Mobilité atomique dans les silicates vitreux et fondus“. Electronic Thesis or Diss., Paris 6, 2014. http://www.theses.fr/2014PA066401.

Der volle Inhalt der Quelle

Annotation:

Cette thèse traite de la diffusion couplée dans un système verrier industriel contenant quatre oxydes (SiO2, Al2O3, CaO, Na2O). La gamme de températures considérée s’étend de la transition vitreuse (650°C) au liquidus (1200°C). Les premiers résultats concernent la nature macroscopique de la diffusion. La matrice des coefficients de diffusion permet de quantifier la mobilité des composants et met en évidence de nombreuses interactions entre eux. D’autres informations sont obtenues à l’échelle microscopique. Les équations d’échanges synthétisent les principaux chemins de diffusion suivis au sein du système sous la forme de réactions. L’ensemble des données de la littérature est traité et semble converger vers des chemins de diffusion préférentiels. Des hypothèses sur les mécanismes de la diffusion des espèces sont proposées. Les résultats obtenus à basse température permettent de discuter les liens entre propriétés de transport et diffusion. L’étude de la structure du matériau s’est appuyée sur la spectroscopie Raman. Les expériences de diffusion donnent accès à un grand nombre de compositions verrières, permettant ainsi de développer un outil statistique de traitement des spectres. Les composantes spectrales ainsi obtenues sont discutées à la lumière des nombreuses observations décrites dans la littérature. Cette démarche permet également d’interpréter les composantes au travers des corrélations entre leurs intensités relatives et la composition du matériau ainsi qu’en étudiant leur évolution le long des profils de diffusion. La possibilité de faire de la spectroscopie Raman une technique de quantification des espèces est discutée
This manuscript deals with the coupled diffusion in an industrial glass system containing four oxides (SiO2, Al2O3, CaO, Na2O). The temperature range extends from the glass transition temperature (650°C) to the liquidus (1200°C). The first results concern the macroscopic nature of diffusion. The matrix containing the diffusion coefficients quantifies the mobility of the components and highlights many interactions between them. Other information can be obtained at the microscopic scale. The exchange equations summarize the main diffusion paths followed by the system in reactions form. All the data from the literature are processed and they seem to converge towards preferential diffusion paths. Hypothesis about the mechanisms of diffusion of the species are proposed. The results obtained at low temperatures open a discussion of the relationship between transport properties and diffusion. The study of the structure of the material was based on Raman spectroscopy. Diffusion experiments provide a large number of glass compositions, which allowed us to develop a statistical tool for handling spectra. The spectral components thus obtained are discussed in the light of the many observations described in the literature. This approach allowed us to interpret the components through correlations between their relative intensities and the composition of the material and by studying their evolution along the diffusion profiles. The possibility of a Raman spectroscopy technique for quantifying species is discussed

APA, Harvard, Vancouver, ISO und andere Zitierweisen

10

Riquieri, Hilton. „Impacto do processo de cristalização na microestrutura e na resistência à flexão de cerâmicas de silicato de lítio reforçadas por zircônia“. Universidade Estadual Paulista (UNESP), 2017. http://hdl.handle.net/11449/152526.

Der volle Inhalt der Quelle

Annotation:

Submitted by HILTON RIQUIERI null (hilton.riquieri@terra.com.br) on 2018-01-11T19:29:07Z No. of bitstreams: 1 Tese Impressão 11-01-18.pdf: 5465220 bytes, checksum: 6c44956d0ac81de9008cdd4833458455 (MD5)
Approved for entry into archive by Silvana Alvarez null (silvana@ict.unesp.br) on 2018-01-18T15:27:03Z (GMT) No. of bitstreams: 1 riquieri_h_dr_sjc.pdf: 5445301 bytes, checksum: bf194667a00b4990a467e32526c3cdb9 (MD5)
Made available in DSpace on 2018-01-18T15:27:03Z (GMT). No. of bitstreams: 1 riquieri_h_dr_sjc.pdf: 5445301 bytes, checksum: bf194667a00b4990a467e32526c3cdb9 (MD5) Previous issue date: 2017-12-04
O objetivo deste trabalho foi avaliar o silicato de lítio reforçado por zircônia quanto a sua microestrutura e as mesmas propriedades mecânicas em diferentes fases de cristalização. Cento e vinte amostras de discos de silicato de lítio reforçado por zircônia foram usinados de acordo com as normas ISO 6872 (12x1,2mm) para o ensaio de flexão biaxial. Foram separados em 4 grupos de acordo com a fase de cristalização. Grupo I: 30 amostras de Celtra pré cristalizado (CNC); Grupo II: 30 amostras de Celtra cristalizado (CC); Grupo III: 30 amostras de Suprinity Não Cristalizado (SNC) e Grupo IV: 30 amostras de Suprinity Cristalizado (SC). Os corpos de prova foram submetidos ao ensaio mecânico de flexão biaxial e em seguida realizadas análises qualitativas e quantitativas. Por meio microscopia eletrônica de varredura, microscopia eletrônica com emissão de campo MEV-FEG, EDS e difração de raios X (n=4), foi realizada a caracterização completa dos materiais e análise morfológica da microestrutura para todos os grupos. Para as análises estatísticas foram utilizados o módulo Weibull (m) e resistência característica (σ0).
The objective of this work was to evaluate the lithium silicate reinforced by zirconia as to its microstructure and the same mechanical properties in different phases of crystallization. One hundred and twenty samples of zirconia-reinforced lithium silicate discs were machined according to ISO 6872 (12x1,2mm) standards for the biaxial flexural test. They were separated into 4 groups according to the crystallization step. Group I: 30 samples of Pre-Crystallized Celtra (CPC); Group II: 30 samples of Crystallized Celtra (CC); Group III: 30 samples of Uncrystallized Suprinity (SNC) and Group IV: 30 samples of Crystallized Suprinity (SC). The specimens were submitted to the mechanical biaxial flexion test and qualitative and quantitative analyzes were performed. Scanning Electron Microscopy, Electron Microscopy with Field emission SEM-FEG, EDS and X-ray diffraction (n = 4) were carried out to characterize the materials and morphological analysis of the microstructure for all groups. The Weibull (m) and characteristic resistance (σ0) were used for the statistical analysis.

APA, Harvard, Vancouver, ISO und andere Zitierweisen

Mehr Quellen

Bücher zum Thema "Silicated"

1

Silvi, Bernard, und Philippe D’Arco, Hrsg. Modelling of Minerals and Silicated Materials. Dordrecht: Springer Netherlands, 2002. http://dx.doi.org/10.1007/0-306-46933-2.

Der volle Inhalt der Quelle

APA, Harvard, Vancouver, ISO und andere Zitierweisen

2

Bernard, Silvi, und D'Arco Philippe, Hrsg. Modelling of minerals and silicated materials. Dordrecht: Kluwer Academic Publishers, 1997.

Den vollen Inhalt der Quelle finden

APA, Harvard, Vancouver, ISO und andere Zitierweisen

3

Silicate crystal chemistry. New York: Oxford University Press, 1992.

Den vollen Inhalt der Quelle finden

APA, Harvard, Vancouver, ISO und andere Zitierweisen

4

Mysen, B. O. Structure and properties of silicate melts. Amsterdam: Elsevier, 1988.

Den vollen Inhalt der Quelle finden

APA, Harvard, Vancouver, ISO und andere Zitierweisen

5

Webb, Sharon L. Silicate melts: With 33 figures. Berlin: Springer, 1997.

Den vollen Inhalt der Quelle finden

APA, Harvard, Vancouver, ISO und andere Zitierweisen

6

A Handbook of silicate rock analysis. London: Blackie Academic & Professional, 1987.

Den vollen Inhalt der Quelle finden

APA, Harvard, Vancouver, ISO und andere Zitierweisen

7

Tagiev, D. B. Kristallicheskie ali͡u︡mosilikaty v katalize. Baku: Ėlm, 1989.

Den vollen Inhalt der Quelle finden

APA, Harvard, Vancouver, ISO und andere Zitierweisen

8

A handbook of silicate rock analysis. Glasgow: Blackie, 1987.

Den vollen Inhalt der Quelle finden

APA, Harvard, Vancouver, ISO und andere Zitierweisen

9

L, Perchuk L., Kushiro I. 1934- und Baker Donald R. 1927-, Hrsg. Physical chemistry of magmas. New York: Springer-Verlag, 1991.

Den vollen Inhalt der Quelle finden

APA, Harvard, Vancouver, ISO und andere Zitierweisen

10

Farwell, Stebbins Jonathan, McMillan Paul Francis 1955- und Dingwell D. B, Hrsg. Structure, dynamics, and properties of silicate melts. Washington, D.C: Mineralogical Society of America, 1995.

Den vollen Inhalt der Quelle finden

APA, Harvard, Vancouver, ISO und andere Zitierweisen

Mehr Quellen

Buchteile zum Thema "Silicated"

1

Liebau, Friedrich. „Nomenclature and Structural Formulae of Silicate Anions and Silicates“. In Structural Chemistry of Silicates, 69–75. Berlin, Heidelberg: Springer Berlin Heidelberg, 1985. http://dx.doi.org/10.1007/978-3-642-50076-3_5.

Der volle Inhalt der Quelle

APA, Harvard, Vancouver, ISO und andere Zitierweisen

2

Okrusch, Martin, und Hartwig E. Frimmel. „Silicates“. In Springer Textbooks in Earth Sciences, Geography and Environment, 157–239. Berlin, Heidelberg: Springer Berlin Heidelberg, 2020. http://dx.doi.org/10.1007/978-3-662-57316-7_11.

Der volle Inhalt der Quelle

APA, Harvard, Vancouver, ISO und andere Zitierweisen

3

Castroviejo, Ricardo. „Silicates“. In A Practical Guide to Ore Microscopy—Volume 1, 819–44. Cham: Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-031-12654-3_135.

Der volle Inhalt der Quelle

APA, Harvard, Vancouver, ISO und andere Zitierweisen

4

Gooch, Jan W. „Silicate“. In Encyclopedic Dictionary of Polymers, 664. New York, NY: Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4419-6247-8_10643.

Der volle Inhalt der Quelle

APA, Harvard, Vancouver, ISO und andere Zitierweisen

5

Schwieger, W., D. Freude, P. Werner und D. Heidemann. „Direct Synthesis of Novel Intercalated Layer Silicates of the Metal Silicate Type“. In Expanded Clays and Other Microporous Solids, 229–44. Boston, MA: Springer US, 1992. http://dx.doi.org/10.1007/978-1-4684-8866-1_11.

Der volle Inhalt der Quelle

APA, Harvard, Vancouver, ISO und andere Zitierweisen

6

Sinha Ray, Suprakas, und Vincent Ojijo. „A Brief Overview of Layered Silicates and Polymer/Layered Silicate Nanocomposite Formation“. In Processing of Polymer-based Nanocomposites, 57–86. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-97779-9_3.

Der volle Inhalt der Quelle

APA, Harvard, Vancouver, ISO und andere Zitierweisen

7

Babushkin, V. I., G. M. Matveyev und O. P. Mchedlov-Petrossyan. „The Basic Concepts and Laws of Thermodynamics“. In Thermodynamics of Silicates, 1–54. Berlin, Heidelberg: Springer Berlin Heidelberg, 1985. http://dx.doi.org/10.1007/978-3-642-69320-5_1.

Der volle Inhalt der Quelle

APA, Harvard, Vancouver, ISO und andere Zitierweisen

8

Babushkin, V. I., G. M. Matveyev und O. P. Mchedlov-Petrossyan. „Pyrosilicate Reactions“. In Thermodynamics of Silicates, 55–249. Berlin, Heidelberg: Springer Berlin Heidelberg, 1985. http://dx.doi.org/10.1007/978-3-642-69320-5_2.

Der volle Inhalt der Quelle

APA, Harvard, Vancouver, ISO und andere Zitierweisen

9

Babushkin, V. I., G. M. Matveyev und O. P. Mchedlov-Petrossyan. „Hydration Reactions“. In Thermodynamics of Silicates, 251–335. Berlin, Heidelberg: Springer Berlin Heidelberg, 1985. http://dx.doi.org/10.1007/978-3-642-69320-5_3.

Der volle Inhalt der Quelle

APA, Harvard, Vancouver, ISO und andere Zitierweisen

10

Babushkin, V. I., G. M. Matveyev und O. P. Mchedlov-Petrossyan. „Corrosion Reactions“. In Thermodynamics of Silicates, 337–53. Berlin, Heidelberg: Springer Berlin Heidelberg, 1985. http://dx.doi.org/10.1007/978-3-642-69320-5_4.

Der volle Inhalt der Quelle

APA, Harvard, Vancouver, ISO und andere Zitierweisen

Konferenzberichte zum Thema "Silicated"

1

Neufuss, K., J. Ilavsky, J. Dubsky, B. Kolman und P. Chraska. „Plasma Spraying of Silicates II“. In ITSC 1999, herausgegeben von E. Lugscheider und P. A. Kammer. Verlag für Schweißen und verwandte Verfahren DVS-Verlag GmbH, 1999. http://dx.doi.org/10.31399/asm.cp.itsc1999p0636.

Der volle Inhalt der Quelle

Annotation:

Abstract Silicates represent a broad group of industrially important ceramic materials. The only silicate that is widely used for plasma spraying is zirconium silicate. Other silicates are generally not used, although they can offer interesting application properties. This paper presents results with other silicates: synthetic wollastonite, stoichiometric mullite, cordierite, and steatite. The input materials were produced in selected sizes from ceramic in industrial quality and applied with the water-stabilized plasma spray system PAL160 to form free-standing panels. The morphology of the microstructure, the thermal expansion, the bulk and filling densities, the open and closed porosity, the phase, and the chemical changes were evaluated. Paper includes a German-language abstract.

APA, Harvard, Vancouver, ISO und andere Zitierweisen

2

Tan, Bee Chea, Ismail Mohd Saaid, Siti Qurratu'Aini Mahat, Suzalina Zainal, Petrus Tri Bhaskoro und Astriyana Anuar. „Evaluation of Polyamidoamine-Assisted Scale Inhibitors to Mitigate Silicate Scale Formation in Near Wellbore Region“. In SPE/IATMI Asia Pacific Oil & Gas Conference and Exhibition. SPE, 2023. http://dx.doi.org/10.2118/215266-ms.

Der volle Inhalt der Quelle

Annotation:

Abstract Silicate scaling is a concern that could result in formation damage and flow assurance issue. Phosphonates and phosphino-polyacrylates are widely used to treat many types of scale but they are not intended to treat silicate scale. Besides that, these inhibitors may have been considered as harmful substances due to their reported inherent biodegradability. Synergistic silicate scale inhibitors are current trends since cationic or anionic polymers alone is found not effective for silicate scale inhibition. The objective of this work is to assess the performance of polyamidoamine-assisted scale inhibitors for silicates. The experiment settings are simulating the environment in near wellbore region, such that higher temperatures and brine that is mostly pH neutral. The effectiveness of scale inhibitors is investigated through static bottle test and dynamic scale loop (DSL) test. The scale inhibitors are also characterized to determine their functional groups in aqueous state. The tendency of scale inhibitors to impede silicate polymerization process is also determined through the remaining concentration of monomeric silica in water after 72 hours. FTIR revealed that all scale inhibitors exhibit amine characteristic in water. Experimental results show that the polyamidoamine-assisted scale inhibitor, PAMAM G-2/PteGlu, is the most effective in mitigating silicate scale formation. It reduces scaling brine's turbidity as much as 94.8% after 72 hours at 90°C. In addition, it also minimizes silicate polymerization process by retaining almost half of the initial monomeric silica concentration. This also implies that PAMAM G-2/PteGlu inhibitor could reduce the tendency of silicate scale formation to 46% as compared to 97% of silicate scale formation without any inhibition at 95°C. From DSL test, PAMAM G-2/PteGlu inhibitor is also the most effective inhibitor. It prolongs the scaling time from 7 minutes to 339 minutes at 0.01 g/L inhibitor concentration. It is also 7% more effective than PAMAM G-1/PteGlu inhibitor in DSL test. In general, the performance of scale inhibitors for silicates can be arranged as: PAMAM G-2/PteGlu > PAMAM G-1/PteGlu > PteGlu > PAMAM G-2 > PAMAM G-1 from top to bottom. In this work, these environment-friendly products had demonstrated good silicate scale inhibition as well as synergistic effect. They could offer as alternatives to commercial scale inhibitors.

APA, Harvard, Vancouver, ISO und andere Zitierweisen

3

Ctibor, P., J. Sedláček, K. Neufuss, J. Dubský und P. Chráska. „Study of Dielectric Properties of Plasma Sprayed Silicates at Low Voltage“. In ITSC2002, herausgegeben von C. C. Berndt und E. Lugscheider. Verlag für Schweißen und verwandte Verfahren DVS-Verlag GmbH, 2002. http://dx.doi.org/10.31399/asm.cp.itsc2002p0617.

Der volle Inhalt der Quelle

Annotation:

Abstract This paper examines the dielectric properties of silicate coatings including mullite (3Al2O3-2SiO2), steatite (MgSiO3), spodumene (Li2O-Al2O3-4SiO2), and olivine with near-forsterite (Mg2SiO4) composition. The materials were sprayed using a water-stabilized plasma gun and the deposits were removed from the substrate, polished, and sputtered with aluminum on both sides. Electrical tests consisting of voltage, resistance, and capacitance measurements showed that the relative conductivity of plasma-sprayed silicates is stable between 200 Hz and 1 MHz, which is suitable for many insulation applications. Paper includes a German-language abstract.

APA, Harvard, Vancouver, ISO und andere Zitierweisen

4

Quet, A., L. Bianchi, E. Darthout, F. Gitzhofer, J. L. Leluan und F. Rebillat. „Yttrium Silicate Coatings by Sol Precursor Plasma Spraying for Environmental Barrier Applications“. In ITSC2011, herausgegeben von B. R. Marple, A. Agarwal, M. M. Hyland, Y. C. Lau, C. J. Li, R. S. Lima und A. McDonald. DVS Media GmbH, 2011. http://dx.doi.org/10.31399/asm.cp.itsc2011p0581.

Der volle Inhalt der Quelle

Annotation:

Abstract Yttrium silicates are among the candidates for protection of silicon-based ceramics in high temperature and moist environments due to chemical and mechanical compatibility with substrate, low volatility and moisture resistance. Here we reported on the development of yttrium silicate coatings by sol precursor plasma spraying. The use of a sol feedstock allowed easy composition flexibility. The microstructure and the structure of as-sprayed and heat-treated coatings were investigated. Finer microstructure was obtained compared to micrometric powder plasma spraying traditionally used to produce environmental barrier coatings (EBC). XRD analyses on as-sprayed coatings revealed amorphous or crystalline layers depending on plasma parameters. In EBC application, a volume change from crystallization or phase transformation was envisaged to be damaging due to induced stresses and fully crystalline phases are a key durability requirement for EBC from conventional plasma spraying. Yttrium silicates are characterized by an important polymorphism and the ability to form amorphous coatings. Therefore, special attention was so paid to the amorphous degree of the coatings.

APA, Harvard, Vancouver, ISO und andere Zitierweisen

5

Martins, Roberto Fernando, Antonio Augusto Couto und Carlos Roberto Camello Lima. „Study on the Attack of Molten Silicates to Thermal Barrier Coatings at Varying Service Temperatures“. In ITSC 2023. ASM International, 2023. http://dx.doi.org/10.31399/asm.cp.itsc2023p0647.

Der volle Inhalt der Quelle

Annotation:

Abstract Thermal barrier coatings have provided a revolution in the industry as they allow a higher operating temperature of equipment, improving the efficiency of gas turbines. However, one of the biggest challenges in terms of increasing the lifespan of TBC systems is the attack of fused silicates or simply CMAS (Calcium-Magnesium-Alumina-Silicate). CMAS are particles from the environment that can penetrate the TBC structure and cause delamination of the coating when exposed to high temperatures during thermal cycling. In this study, a plasma sprayed YSZ coating in the as coated and surface treated condition were given CMAS depositions from various preparation methods, and then subjected to thermal cycles at different evaluation temperatures and exposure times. The permeability of the ceramic layer and the penetration path of CMAS at different temperature levels were evaluated, as well as the penetration characteristics in relation to the microstructure of the ceramic layer. X-Ray diffraction and Scanning Electron Microscopy were used to characterize the applied CMAS and the penetration kinetics and conditions. Samples with longer exposure time had a considerable volume increase. The conditions to guarantee the formation of the silicate and its consequent wettability are also discussed.

APA, Harvard, Vancouver, ISO und andere Zitierweisen

6

SUN, Desi. „The alternation of surface electrokinetic characteristics before and after interaction between silicate bacteria and silicates“. In 2011 International Workshop on Engineering Application Research. Hangzhou: IEIT Press, 2011. http://dx.doi.org/10.5813/www.ieit-web.org/ips.1.22.

Der volle Inhalt der Quelle

APA, Harvard, Vancouver, ISO und andere Zitierweisen

7

Hussain, Farzana, Derrick Dean und Anwarul Haque. „Structures and Characterization of Organoclay-Epoxy-Vinylester Nanocomposites“. In ASME 2002 International Mechanical Engineering Congress and Exposition. ASMEDC, 2002. http://dx.doi.org/10.1115/imece2002-33552.

Der volle Inhalt der Quelle

Annotation:

The field of polymer-clay nanocomposites has attracted considerable attention as a method of enhancing polymer properties and extending their utility. Layered silicates dispersed as a reinforcing phase in a polymer matrix are one of the most important forms of such inorganic-organic nanocomposites, making them the subject of intense research. We have recently prepared several thermoset-based nanocomposites with improved thermal and mechanical properties. This paper is primarily focused in studying the effects of nano clay particles such as montmorillonite on improving mechanical and thermal properties of the polymer matrix composite. Epoxy and vinyl ester nanocomposites were prepared by adding different weight percentages (0.5%, 1%, 2%, 5% and 10%) of montmorillonite nano clay particles to epoxy and vinyl ester matrices. The results show significant improvements in mechanical and thermal properties of the nanostructured materials with low loading of organo silicates. Thermal property measurement includes dynamic mechanical analysis (DMA). Mechanical properties such as flexural strength and flexural modulus of polymer matrix were improved in nano structured materials owing to their unique phase morphology and improved interfacial interactions. Molecular dispersion of the layered silicate within the cross-linked matrix was verified using Wide Angle X-Ray Diffraction (WAXD) and Transmission Electron Microscopy (TEM) revealing the intercalated nanocomposites were formed.

APA, Harvard, Vancouver, ISO und andere Zitierweisen

8

Petrov, D. V., A. A. Savushkin und E. A. Zhuzhulina. „10-micron emission feature of nonspherical olivine particles“. In Всероссийская с международным участием научная конференция студентов и молодых ученых, посвященная памяти Полины Евгеньевны Захаровой «Астрономия и исследование космического пространства». Ural University Press, 2021. http://dx.doi.org/10.15826/b978-5-7996-3229-8.37.

Der volle Inhalt der Quelle

Annotation:

Many astronomical objects, from comets to circumstellar disks, contain silicate particles. The spectrum of silicates has a set of emission features, the most characteristic of which is in the spectral range of about 10 microns, and is called a 10-micron emission feature. The 10-micron emission feature is often studied under the assumption that the scattering particles are spherical. In this work, we investigated the contribution of nonspherical particles (elongated and oblate spheroids) of olivine to the 10-micron emission feature. It is shown that enough large non-spherical particles (whose size more than 20 microns) cause a noticeable increasing of scattering cross section Csca in comparison with spheres. Thus, the observed 10-micron emission feature of large particles can be explained by the non-sphericity of the scattering particles.

APA, Harvard, Vancouver, ISO und andere Zitierweisen

9

Gao, W., H. L. Liao und C. Coddet. „Oxide Ion Conductivity in Dense Apatite-Type Lanthanum Silicate“. In ITSC2010, herausgegeben von B. R. Marple, A. Agarwal, M. M. Hyland, Y. C. Lau, C. J. Li, R. S. Lima und G. Montavon. DVS Media GmbH, 2010. http://dx.doi.org/10.31399/asm.cp.itsc2010p0791.

Der volle Inhalt der Quelle

Annotation:

Abstract In order to improve the ionic conductivity of lanthanum silicates, which have been considered as the new electrolyte candidates for intermediate temperature solid oxide fuel cells (IT-SOFCs), the feedstock powders are prepared by sintering the mixed oxide powders in different temperatures and sintering times. The main phase of all the samples is the hexagonal apatite structure. The apatite-type ceramic coatings with a typical composition of La10(SiO4)6O3 are deposited by atmospheric plasma spraying (APS). The influence of sintering time of feedstock powders on the electrical properties of La10(SiO4)6O3 electrolyte coatings is reported here. The highest conductivity of the dense composite electrolyte coatings reaches 6.8×10-6 S·cm-1 at 435 °C in air which is comparable to other apatite-type lanthanum silicate (ATLS) conductors.

APA, Harvard, Vancouver, ISO und andere Zitierweisen

10

Miniscalco, William J. „Materials for Erbium-Doped Fiber Amplifiers“. In Optical Amplifiers and Their Applications. Washington, D.C.: Optica Publishing Group, 1991. http://dx.doi.org/10.1364/oaa.1991.wd1.

Der volle Inhalt der Quelle

Annotation:

Fiber offers an extremely favorable geometry for optical devices, and fiber lasers [1] and amplifiers [2] were reported only shortly after the first bulk glass laser [3]. The choice of host composition has always been an important consideration. Silicates are the oldest and best understood glasses, and the first glass lasers used silicate compositions selected for high rare earth solubility and long lifetimes for the metastable state. The use of phosphate glass significantly improved the performance of early bulk Er3+ lasers [4] and it has become the most common host for bulk glass lasers doped with Er3+ and Nd3+. Although outstanding performance has been achieved using single-mode silica fiber, silica is a poor host for most activator ions, particularly rare earths. The influence of glass composition on the properties of Er3+ fiber amplifiers will be considered with particular emphasis placed upon silica; a more detailed discussion can be found in Ref. [5].

APA, Harvard, Vancouver, ISO und andere Zitierweisen

Berichte der Organisationen zum Thema "Silicated"

1

James Butz, Thomas Broderick und Craig Turchi. Amended Silicated for Mercury Control. Office of Scientific and Technical Information (OSTI), Dezember 2006. http://dx.doi.org/10.2172/932891.

Der volle Inhalt der Quelle

APA, Harvard, Vancouver, ISO und andere Zitierweisen

2

Kelley, James. Catechol effected dissolution of silicate minerals. Portland State University Library, Januar 2000. http://dx.doi.org/10.15760/etd.970.

Der volle Inhalt der Quelle

APA, Harvard, Vancouver, ISO und andere Zitierweisen

3

Mueller, H., und L. M. Perle. Long lifetime silicate laser glass compositions. Office of Scientific and Technical Information (OSTI), August 1985. http://dx.doi.org/10.2172/6730599.

Der volle Inhalt der Quelle

APA, Harvard, Vancouver, ISO und andere Zitierweisen

4

Glazner, A. F. Activity composition relationships in silicate melts. Office of Scientific and Technical Information (OSTI), Januar 1990. http://dx.doi.org/10.2172/7031820.

Der volle Inhalt der Quelle

APA, Harvard, Vancouver, ISO und andere Zitierweisen

5

Shen, Andy Anda. Analyzing Silicates in Los Alamos’s Water Supply. Office of Scientific and Technical Information (OSTI), Juli 2019. http://dx.doi.org/10.2172/1557154.

Der volle Inhalt der Quelle

APA, Harvard, Vancouver, ISO und andere Zitierweisen

6

Sterne, P. A., und A. Meike. Electronic structure calculations of calcium silicate hydrates. Office of Scientific and Technical Information (OSTI), November 1995. http://dx.doi.org/10.2172/212471.

Der volle Inhalt der Quelle

APA, Harvard, Vancouver, ISO und andere Zitierweisen

7

Schwartzman, D. Microbial dissolution of silicate materials. Final report. Office of Scientific and Technical Information (OSTI), März 1996. http://dx.doi.org/10.2172/270676.

Der volle Inhalt der Quelle

APA, Harvard, Vancouver, ISO und andere Zitierweisen

8

Wereszczak, Andrew A., Kathryn J. Ham, Yogesh K. Vohra, Georgiy Tsoi, Brian A. Oistad, Brett S. Kuwik, Emily F. Steiner, Osama Jadaan und Benjamin L. Hackett. High-Pressure Mechanical Response of Two Vitreous Silicates. Office of Scientific and Technical Information (OSTI), November 2018. http://dx.doi.org/10.2172/1482450.

Der volle Inhalt der Quelle

APA, Harvard, Vancouver, ISO und andere Zitierweisen

9

Huka, M., und I. Rubeska. An expeditious wet chemical analysis of silicate rocks. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1993. http://dx.doi.org/10.4095/193307.

Der volle Inhalt der Quelle

APA, Harvard, Vancouver, ISO und andere Zitierweisen

10

Choppin, Gregory R., und Andrew R. Felmy. Thermodynamics and Complexation Reactions of Anionic Silicate Species. Office of Scientific and Technical Information (OSTI), Juni 2001. http://dx.doi.org/10.2172/833629.

Der volle Inhalt der Quelle

APA, Harvard, Vancouver, ISO und andere Zitierweisen

Wir bieten Rabatte auf alle Premium-Pläne für Autoren, deren Werke in thematische Literatursammlungen aufgenommen wurden. Kontaktieren Sie uns, um einen einzigartigen Promo-Code zu erhalten!