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Relevant bibliographies by topics / Silicon alkoxide

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Academic literature on the topic 'Silicon alkoxide'

Author: Grafiati

Published: 30 May 2022

Last updated: 31 May 2022

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Journal articles on the topic "Silicon alkoxide"

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Kemmitt, Tim, and William Henderson. "A New Route to Silicon Alkoxides from Silica." Australian Journal of Chemistry 51, no. 11 (1998): 1031. http://dx.doi.org/10.1071/c98060.

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A novel route to tetraethoxysilane and other silicon alkoxides is described, from amorphous silica (SiO2.nH2O) as the raw material. The reaction of amorphous silica with triethanolamine is enhanced by using an alkali metal hydroxide catalyst, to form a range of triethanolamine-substituted silatrane species. These can undergo alkoxide exchange in acidic alcohols to form alkoxysilatranes, tetraalkoxysilanes, hexaalkoxydisiloxanes and higher siloxanes. Reaction of triethanolamine-substituted silatranes with acetic anhydride produces acetoxysilatrane. Products were identified by multinuclear (1H, 13C and 29Si) magnetic resonance spectroscopy, electrospray mass spectrometry or high-resolution gas chromatography electron impact mass spectrometry.

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Manocha, L. M., Arpana Basak, S. Manocha, and Ankur Darji. "Morphological Studies on CNT Reinforced SiC/SiOC Composites." Eurasian Chemico-Technological Journal 13, no. 1-2 (December 21, 2010): 41. http://dx.doi.org/10.18321/ectj64.

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Carbon nanotubes (CNTs) have been grown on commercially available silicon carbide (SiC) fabric by the catalytic chemical vapour deposition (CCVD) technique. These CNT coated SiC fabrics were used to develop Silicon Carbide–Carbon Nanotube–Silicon oxy Carbide matrix composites (SiC/CNTs/SiOC) by sol gel technique. Silicon oxy Carbide refers to carbon containing silicates wherein oxygen and carbon atoms share bonds with silicon in the amorphous network structure. In this approach, alkyl-substituted silicon alkoxides, which are molecular precursors containing oxygen and carbon functionalities on the silicon, are hydrolyzed and condensed in the presence of sucrose, which provides excess of carbon to bond into the silicon alkoxide network during hydrolysis. A low-temperature (1000 °C) heat-treatment of the gel creates a glassy silicate material whose molecular structure consists of an oxygen/carbon anionic network. The microstructures of these hybrid materials and their composites have been studied using scanning electron microscope (SEM), transmission electron microscope (TEM) and Raman spectroscope.

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Dirè, Sandra, Evgeny Borovin, Masaki Narisawa, and Gian Domenico Sorarù. "Synthesis and characterization of the first transparent silicon oxycarbide aerogel obtained through H2decarbonization." Journal of Materials Chemistry A 3, no. 48 (2015): 24405–13. http://dx.doi.org/10.1039/c5ta06669g.

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Matsukawa, Hiroaki, Satoshi Yoda, Yasuo Okawa, and Katsuto Otake. "Phase Behavior of a Carbon Dioxide/Methyl Trimethoxy Silane/Polystyrene Ternary System." Polymers 11, no. 2 (February 2, 2019): 246. http://dx.doi.org/10.3390/polym11020246.

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Recently, polymeric foams filled with a silica aerogel have been developed. The phase behavior of CO2/silicon alkoxide binary systems and CO2/silicon alkoxide/polymer ternary systems is an important factor that affects the design of novel processes. The phase behavior of a carbon dioxide (CO2)/methyl trimethoxy silane (MTMS)/polystyrene (PS) ternary system was measured using a synthetic method involving the observation of the bubble and cloud point. The phase boundaries were measured at temperatures ranging from 313.2 to 393.2 K and CO2 weight fractions between 0.01 and 0.08. The CO2/MTMS/PS system showed a similar CO2 mass fraction dependence of the phase behavior to that observed for the CO2/tetramethyl orthosilicate (TMOS)/PS system. When the phase boundaries of these systems were compared, the vapor-liquid (VL) and vapor-liquid-liquid (VLL) lines were found to be nearly identical, while the liquid-liquid (LL) lines were different. These results indicate that the affinity between the silicon alkoxide and polymer greatly influences the liquid-liquid phase separation.

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Zhang, Ruichao, and Ren Xu. "Chemical Vapor Deposition of Sr1−xBaxNb2O6 Thin Films Using Metal Alkoxide Precursors." Journal of Materials Research 15, no. 8 (August 2000): 1702–8. http://dx.doi.org/10.1557/jmr.2000.0245.

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A novel two-step metalorganic chemical vapor deposition process was used in this study to prepare Sr1−xBaxNb2O6 (SBN) thin films. Two thin layers of single-phase SrNb2O6 and BaNb2O6 were deposited alternately on a silicon substrate, and the solid solution of SBN was obtained by high-temperature annealing. The stoichiometry control of the SrNb2O6 and the BaNb2O6 thin films was achieved through deposition process control, according to the evaporation characteristics of double metal alkoxide. The evaporation behavior of double metal alkoxide precursors SrNb2(1-OC4H9)12 and BaNb2(1-OC4H9)12 was studied, and the results were compared with the evaporation of single alkoxide Nb(1-OC4H9)5.

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Davis, E. James, and Mark F. Buehler. "Chemical Reactions with Single Microparticles." MRS Bulletin 15, no. 1 (January 1990): 26–33. http://dx.doi.org/10.1557/s088376940006070x.

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Fine particles can be produced via aerosol processes either by means of vapor phase reactions that produce solid or liquid particles or by reactions between a preexisting solid or liquid particle and a reactive gas. This article examines the latter processes because a strong interest has developed in the production of materials via aerosol processing. Although fine particles are frequently produced using flow systems, such as in the laminar flow aerosol reactor of McRae and his co-workers, fundamental studies of the chemical kinetics are more readily done using single microparticles or microdroplets. Design of an aerosol reactor requires knowledge of the reaction rates, for there must be a sufficient residence time of the reacting species in the reactor to complete the desired reaction.Matijević reviewed early work on preparing well-defined and very pure metal oxides by hydrolysis of alkoxide aerosol particles, and Ingebrethsen and co-workers studied the hydrolysis rates of aerosol droplets of aluminum and titanium alkoxides and mixtures of the two alkoxides. Following Matijevic and his colleagues, Okuyama et al. used the thermal decomposition of metal alkoxide vapors to produce ultrafine particles of the oxides of titanium, silicon, and aluminum. The preparation of polymeric aerosols has been studied by Partch et al. and by Ward et al. The latter investigators used single-particle techniques (the electrodynamic balance) to obtain polymerization rate data for the photochemical polymerization of acrylamide monomer microparticles.

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Budd, K. D., S. K. Dey, and D. A. Payne. "Microstructural characterization of sol-gel derived PbTiO3 thin films." Proceedings, annual meeting, Electron Microscopy Society of America 44 (August 1986): 836–37. http://dx.doi.org/10.1017/s0424820100145522.

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A process has been developed for the fabrication of continuous, crack-free layers, of a series of compositions in the PbO-La2O3-TiO2-ZrO2 system. These layers were formed by spin-casting solutions of complex alkoxides onto platinum, silicon, silica, and a variety of substrates. The dried layers were amorphous gels which could be densified and converted to ceramic films at relatively low temperatures (e.g., 350-500°C). Gellation was caused by the condensation polymerization of alkoxide molecules, and was initiated by hydrolysis of the alkoxy groups. Gel structures were manipulated by controlling hydrolysis conditions (catalyst and amount of water) in an effort to control pyrolysis behaviour, optimize microstructures, and minimize firing temperatures. Lower processing temperatures increased the compatibility with substrates such as Si wafers. Structural control was possible because the polymerization reactions become site-specific under certain hydrolysis conditions. As discussed below, microstructures of thin films were influenced considerably by both the type of catalyst, and by interactions with silicon substrates.

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Ludeña Huaman, Michael Azael. "Proceso Sol-Gel en la Síntesis de Dióxido de Silicio (Sio2)." Revista Bases de la Ciencia. e-ISSN 2588-0764 6, no. 2 (August 30, 2021): 1. http://dx.doi.org/10.33936/rev_bas_de_la_ciencia.v6i2.2548.

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En ciencia de los materiales el dióxido de silicio, también conocido como sílice, ha recibido significante atención en diferentes áreas de investigación, ganando un espacio importante y de mucho interés entre los investigadores, debido a sus diversas aplicaciones que abarcan desde la síntesis de soportes para catalizadores hasta materiales para la liberación controlada de fármacos. Es motivo por el cual, en este manuscrito se dan a conocer aspectos químicos fundamentales e importantes sobre el proceso sol-gel en la síntesis de la sílice a partir de moléculas precursoras de alcóxidos de silicio y organosilanos. Se analiza cómo el catalizador ácido/básico y el tipo de precursor afectan a las reacciones de hidrólisis y condensación, así como a la estructura y morfología del material. Palabra clave: Sílice, Sol-gel, Hidrólisis, Condensación, Alcóxido. Abstract In materials science, silicon dioxide has received significant attention in different research areas, gaining valuable space and interest between researchers due to its diverse applications, ranging from the synthesis of supports for catalysts to materials for controlled drug liberation. Herein we describe fundamental and important chemical aspects of the sol-gel process in the synthesis of silica, starting from precursor molecules of silicon alkoxides and organosilanes. Moreover, this review analyses how the acid/basic catalyst and the type of precursor affect the hydrolysis and condensation reaction, as well as the structure and morphology of the obtained material. Keywords: Silica, Sol-gel, Hydrolysis, Condensation, Alkoxide.

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Pozarnsky, G. A., and A. V. McCormick. "The role of transesterification in the multistep “prehydrolysis” sol/gel synthesis of aluminum-rich aluminosilicate gels." Journal of Materials Research 11, no. 4 (April 1996): 922–27. http://dx.doi.org/10.1557/jmr.1996.0115.

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Using a prehydrolysis technique, transparent gels with very high aluminum content can be achieved with the use of isopropanol. Here 13C, 27Al, 29Si and 17O NMR at various stages of preparation show that when the aluminum added exceeds the number that silanols can fully protect, the excess aluminum alkoxide groups readily undergo transesterification with isopropanol. The aluminum isopropoxide (Al–OPri) groups thus formed are shown to be sufficiently stable that attack by water is impeded, thus allowing the remaining silicon alkoxide groups to hydrolyze and condense to form a homogeneous gel.

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Oh, Junrok, Hiroaki Imai, and Hiroshi Hirashima. "Direct deposition of silica films using silicon alkoxide solution." Journal of Non-Crystalline Solids 241, no. 2-3 (November 1998): 91–97. http://dx.doi.org/10.1016/s0022-3093(98)00772-8.

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Dissertations / Theses on the topic "Silicon alkoxide"

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Schnitzlbaumer, Malaika Diana. "Seltenerdmetall-Alkoxide auf periodisch mesoporösem Silica." [S.l.] : [s.n.], 2006. http://mediatum2.ub.tum.de/doc/604395/document.pdf.

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Макаренко, Виктория Васильевна. "Теплоэлектроизоляционный материал и изделия из него с повышенной стойкостью в потоках ионизованного газа." Thesis, НТУ "ХПИ", 2017. http://repository.kpi.kharkov.ua/handle/KhPI-Press/29350.

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Диссертация на соискание ученой степени кандидата технических наук по специальности 05.17.11 – технология тугоплавких неметаллических материалов. – Национальный технический университет "Харьковский политехнический институт", Харьков, 2017. Диссертация посвящена разработке технологии корундовых композиционных материалов и изделий из них сложной конфигурации для эксплуатации в потоках ионизированного газа, вместо дорогих ГП аналогов, которые используются в новой технике. При проектировании составов КМ на основе системы Аl₂O₃–SiO₂ использован золь-гель процесс, спекающие добавки и модифицирование наполнителя и волокон алкоксидом кремния. Установлены температура появления расплава в корундовой матрице, закономерности муллитообразования и спекания смесей электрокорунда с золь-гель связующим с добавкой В₂O₃. Показано, что управление количеством синтезированного муллита может осуществляться за счет изменения количества образованного расплава путем варьирования концентраций В₂O₃ в золе и плотности золь-гель связующего. Установлен механохимический синтез муллита в процессе измельчения электрокорунда с добавкой алкоксида кремния. Исследованы физико-химические и эксплуатационные свойства материала с муллитокремнеземистым и поликристаллическим корундовым волокном. Установлено, что благодаря присутствию наночастиц муллита и высокой однородности структуры с введенным поликристаллическим волокном обеспечивается повышение твердости и трещиностойкости материала СМД, что обеспечивает более высокую стойкость в потоках ионизованного газа, чем ГП материалов новой техники. Показано, что управление количеством синтезированного муллита может осуществляться за счет изменения количества образованного расплава. При обжиге электрокорунда модифицированного алкоксидом кремния с 1 % поликристаллического волокна, образуется однородная мелкокристаллическая структура из матрицы α-Аl₂O₃, армированной частицами и нитевидными кристаллами муллита и поликристаллическим волокном, которые равномерно распределяются между собой. При обжиге в азотной среде на поверхности материала образуется оксинитридная пленка, которая уплотняет поверхность изделия и улучшает стойкость его к износу в потоках ионизированных газов. Установлено, что разработанная технология с использованием модифицированного алкоксидом кремния поликристаллического волокна, обеспечивает замедление начала кристаллизации структуры волокна, а комплексное связующее ускоряет муллитизацию корундовой матрицы и интенсифицирует ее спекание, создается фрагментальная структура материала, обеспечивающая повышение его физико-механических свойств и трещиностойкости. Трещиностойкость составляет 12,0-12,7 МПа·м⁰ˈ⁵, диаграммы деформирования материала СМД подобны слоистым металокерамическим материалам. Разработанный КМ СМД имеет однородную структуру, характеризуется пределом прочности при сжатии выше 900 МПа, электросопротивлением 3·10¹¹ Ом, термостойкостью – выше 50 термосмен 1000 ⁰С – вода. Ключевые слова: композиционный материал, Аl₂O₃–SiO₂, электрокорунд, волокно муллитокремнеземистое, волокно поликристаллическое корундовое, механоактивация, алко-ксид кремния, золь-гель, синтез новообразований, муллит, SiC, оксинитрид кремния, функциональные свойства, стойкость в потоках ионизированного газа
Polytechnic Institute", Kharkov, 2017. The thesis is devoted to the development of technology for alumina composite materials and products of complex configuration for use in streams of ionized gas instead of expensive GP analogues used in the new technique. When designing the warehouses of CM based on the system Аl₂O₃–SiO₂ is used the possibilities of mechanochemical activation processes of synthesis of refractory compounds in the modification of corundum filler alkoxide silicon and when using the Sol-gel binder, in particular with the addition of boric acid to intensify multitorrent, coating a surface of a polycrystalline fiber alkoxide silicon to prevent its crystallization during heating and compaction during the pressing masses on the basis of electrocorundum and ceramic fibers through the use of complex binder paraffin–Sol with ethylsilicate. The physical and chemical processes during heating of modified components, their mixtures with different swatowski, the conditions of heat treatment of the masses using various media. The developed compositions and technological parameters of manufacturing a KM with multitransistor and polycrystalline fibre products for the manufacture of various purposes with a complex of high mechanical properties. Developed KM of SMD homogeneous structure for the flow of ionized gas is characterized by the limit of compressive strength of above 900 MPa, fracture toughness 12,0-12,8 MPa∙м⁰ˈ⁵, the resistivity of 3·10¹¹ Om, resistance – above 50 thermo-changes 1000 °C – water.

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Макаренко, Вікторія Василівна. "Теплоелектроізоляційний матеріал та вироби з нього з підвищеною стійкістю в потоках іонізованого газу." Thesis, НТУ "ХПІ", 2017. http://repository.kpi.kharkov.ua/handle/KhPI-Press/29347.

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Дисертація на здобуття наукового ступеня кандидата технічних наук за спеціальністю 05.17.11 – технологія тугоплавких неметалічних матеріалів. – Національний технічний університет "Харківський політехнічний інститут", Харків, 2017 р. Дисертацію присвячено розробці технології корундових композиційних матеріалів і виробів із них складної конфігурації для експлуатації в потоках іонізованого газу замість дорогих ГП аналогів, що використовуються в новій техніці. При проектуванні складів КМ на основі системи Аl₂O₃–SiO₂ використано можливості механохімічної активації процесів синтезу тугоплавких сполук при модифікації корундового наповнювача алкоксидом кремнію та при використанні золь-гель зв'язуючих, в тому числі з добавкою борної кислоти, для інтенсифікації мулітоутворення, покриття поверхні полікристалічного волокна алкоксидом кремнію для запобігання його кристалізації при нагріванні та ущільнення при пресуванні мас на основі електрокорунду та керамічного волокна за рахунок використання комплексного звязуючого парафін–золь із етилсилікату. Встановлено фізико-хімічні процеси при нагріванні модифікованих компонентів, їх сумішей із різними зв'язуючими, встановлено режими термообробки мас при використанні різних середовищ. Розроблено склади та технологічні пара-метри виготовлення КМ з використанням мулітокремнеземного та полікристалічного волокна для виготовлення виробів різного призначення з комплексом високих механічних властивостей. Розроблений композиційний матеріал одно-рідної структури для служби в потоках іонізованого газу характеризується межею міцності при стиску вище, ніж 900 МПа, тріщиностійкістю 12,0 МПа·м⁰ˈ⁵, електроопором 3·10¹¹ Ом, термостійкістю – більш, ніж 50 термозмін 1000 ⁰С–вода.
The dissertation on competition of a scientific degree of candidate of technical Sciences in specialty 05.17.11 – technology of refractory nonmetallic materials. – National technical University "Kharkiv Polytechnic Institute", Kharkov, 2017. The thesis is devoted to the development of technology for alumina composite materials and products of complex configuration for use in streams of ionized gas instead of expensive GP analogues used in the new technique. When designing the warehouses of CM based on the system Аl₂O₃–SiO₂ is used the possibilities of mechanochemical activation processes of synthesis of refractory compounds in the modification of corundum filler alkoxide silicon and when using the Sol-gel binder, in particular with the addition of boric acid to intensify multitorrent, coating a surface of a polycrystalline fiber alkoxide silicon to prevent its crystallization during heating and compaction during the pressing masses on the basis of electrocorundum and ceramic fibers through the use of complex binder paraffin–Sol with ethylsilicate. The physical and chemical processes during heating of modified components, their mixtures with different swatowski, the conditions of heat treatment of the masses using various media. The developed compositions and technological parameters of manufacturing a KM with multitransistor and polycrystalline fibre products for the manufacture of various purposes with a complex of high mechanical properties. Developed KM of SMD homogeneous structure for the flow of ionized gas is characterized by the limit of compressive strength of above 900 MPa, fracture toughness 12,0-12,8 MPa∙м⁰ˈ⁵, the resistivity of 3·10¹¹ Om, resistance – above 50 thermo-changes 1000 °C – water.

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Kitschke, Philipp. "Experimental and theoretical studies on germanium-containing precursors for twin polymerization." Doctoral thesis, Universitätsbibliothek Chemnitz, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-qucosa-205443.

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Im Fokus dieser Arbeit standen zwei Ziele. Zum einem war es Forschungsgegenstand, dass Konzept der Zwillingspolymerisation auf germaniumhaltige, molekulare Vorstufen wie zum Beispiel Germylene, spirozyklische Germaniumverbindungen und molekulare Germanate zu erweitern und somit organisch-anorganische Komposite beziehungsweise Hybridmaterialien darzustellen. Dazu wurden neuartige Germaniumalkoxide auf der Basis von Benzylalkoholaten, Salicylalkoholaten sowie Benzylthiolaten synthetisiert, charakterisiert und auf ihre Fähigkeit Komposite beziehungsweise Hybridmaterialien über den Prozess der Zwillingspolymerisation zu erhalten studiert. Ein zweites Ziel dieser Arbeit war es, Beziehungen zwischen der Struktur und der Reaktivität dieser molekularen Vorstufen sowie deren Einfluss auf die Eigenschaften der erhaltenen Polymerisationsprodukte zu identifizieren und systematisch zu untersuchen. Hierfür wurden zum einen verschiedene Substituenten, welche unterschiedliche elektronische sowie sterische Eigenschaften aufweisen, an den aromatischen Einheiten der molekularen Vorstufen eingeführt. Die Effekte der Substituenten auf den Prozess der Zwillingspolymerisation und auf die Eigenschaften der Komposite beziehungsweise Hybridmaterialien wurden für die Verbindungsklasse der Germanium(II)salicylalkoholate, der molekularen Germanate sowie der spiro-zyklischen Siliziumsalicylalkoholate untersucht. Spirozyklische Siliziumsalicylalkoholate, wie zum Beispiel 4H,4’H-2,2‘-Spirobi[benzo[d][1,3,2]dioxasilin], wurden im Rahmen dieser Arbeit mit einbezogen, da sie aufgrund ihres nahezu idealen Zwillingspolymerisationsprozesses geeignete Modelverbindungen für Reaktivitätsstudien darstellen. Zudem wurde der Einfluss der Substituenten auf die Charakteristika der aus den Kompositen beziehungsweise Hybridmaterialien erhaltenen Folgeprodukte (poröse Kohlenstoffmaterialien und oxydische Materialien) studiert. Des Weiteren wurde eine Serie von spirozyklischen Germaniumthiolaten, welche isostrukturell zu 4H,4’H-2,2‘-Spirobi[benzo[d][1,3,2]dioxasilin] sind, synthetisiert, um systematisch den Einfluss der Chalkogenide, Sauerstoff und Schwefel, in benzylständiger sowie phenylständiger Position auf deren Reaktionsvermögen im Polymerisationsprozess zu untersuchen. Die experimentellen Ergebnisse zu den Struktur-Reaktivitätsbeziehungsstudien wurden, soweit es jeweils durchführbar war, mittels quantenchemische Rechnungen validiert und die daraus gezogenen Schlüsse in die Diskussion zur Interpretation der experimentellen Ergebnisse mit einbezogen.

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Khosravi, Mardkhe Maryam. "Facile Synthesis and Characterization of a Thermally Stable Silica-Doped Alumina with Tunable Surface Area, Porosity, and Acidity." BYU ScholarsArchive, 2014. https://scholarsarchive.byu.edu/etd/3968.

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Mesoporous γ-Al2O3 is one of the most widely used catalyst supports for commercial catalytic applications. The performance of a catalyst strongly depends on the combination of textural, chemical and physical properties of the support. Pore size is essential since each catalytic system requires a unique pore size for optimal catalyst loading, diffusion and selectivity. In addition, high surface area and large pore volume usually result in higher catalyst loading, which increases the number of catalytic reaction sites and decreases reaction time. Therefore, determination of surface area and porosity of porous supports is critical for the successful design and optimization of a catalyst support. Moreover, it is important to produce supports with good thermal stability since pore collapsing due to sintering at high temperatures often results in catalyst deactivation. In addition, the ability to control the acidity of the catalyst enables us to design desirable acid sites to optimize product selectivity, activity, and stability in different catalytic applications. This dissertation presents a simple, one-pot, solvent-deficient method to synthesize thermally stable silica-doped alumina (SDA) without using templates. The XRD (X-ray diffraction), HTXRD (high temperature X-ray diffraction), SS NMR (solid state nuclear magnetic resonance), TEM (transmission electron microscopy), TGA(thermogravimetric analysis), and N2 adosorption techniques are used to characterize the structures of the synthesized SDAs and understand the origin of increased thermal stability. The obtained SDAs have a surface area of 160 m2/g, pore volume of 0.99 cm3/g, and a bimodal pore size distribution of 23 and 52 nm after calcination at 1100◦C. Compared to a commercial SDA, the surface area, pore volume, and pore diameter of synthesized SDAs are higher by 46%, 155%, and 94%, respectively. A split-plot fractional-factorial experimental design is also used to obtain a useful mathematical model for the control of textural properties of SDAs with a reduced cost and number of experiments. The proposed quantitative models can predict optimal conditions to produce SDAs with high surface areas greater than 250 m2/g, large pore volume greater than 1 cm3/g, and large (40-60 nm) or medium (16-19 nm) pore diameters. In my approach, I control acid sites formation by altering preparation variables in the synthesis method such as Si/Al ratio and calcination temperatures. The total acidity concentration (Brønsted and Lewis) of the synthesized SDAs are determined using ammonia temperatured program, pyridine fourier transform infrared spectroscopy (FTIR), and MAS NMR. The total acidity concentration is increased by introducing a higher mole ratio of Si to Al. In addition, the total acidity concentration is decreased by increasing calcination temperature while maintaining high surface area, large porosity, and thermal stability of γ-alumina support. I also present an optimized synthesis of various aluminum alkoxides (aluminum n-hexyloxide (AH), aluminum phenoxide (APh) and aluminum isopropoxide (AIP)) with high yields (90-95%). One mole of aluminum is reacted with excess alcohol in the presence of 0.1 mole % mercuric chloride catalyst. The synthesized aluminum alkoxides are used as starting materials to produce high surface area alumina catalyst supports. Aluminum alkoxides and nano aluminas are analyzed by 1H NMR, 13C NMR, 27Al NMR, gCOSY (2D nuclear magnetic resonance spectroscopy), IR (infrared spectroscopy), XRD, ICP (induced coupled plasma), and elemental analysis.

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Schnitzlbaumer, Malaika Diana [Verfasser]. "Seltenerdmetall-Alkoxide auf periodisch mesoporösem Silica / Malaika Diana Schnitzlbaumer." 2006. http://d-nb.info/985436689/34.

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Book chapters on the topic "Silicon alkoxide"

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Gaspar, P. P. "From Silicon Alkoxides, Silicon Carboxylates or Siloxanes." In Inorganic Reactions and Methods, 163–70. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2007. http://dx.doi.org/10.1002/9780470145234.ch84.

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Oshima, K. "From Low-Valent Titanium Alkoxide–Alkynylsilane Complexes." In Compounds of Groups 15 (As, Sb, Bi) and Silicon Compounds, 1. Georg Thieme Verlag KG, 2002. http://dx.doi.org/10.1055/sos-sd-004-00796.

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Niwa, Miki, Norihisa Senoh, Takashi Hibino, Yasuo Nakatsuka, and Yuichi Murakami. "Reactant Shape-selectivity for Cracking of Linear Paraffin on HZSM-5 Modified by CVD of Silicon Alkoxide: A Strong Dependence upon the Reaction Temperature." In Zeolites and Microporous Crystals, Proceedings of the International Symposium on Zeolites and Microporous Crystals, 155–62. Elsevier, 1994. http://dx.doi.org/10.1016/s0167-2991(08)63253-x.

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Mahmood, Wan Ahmad Kamil, and Mohammad Hossein Azarian. "Inorganic-Organic Composite Materials from Liquid Natural Rubber and Epoxidised Natural Rubber Derivatives." In Applied Environmental Materials Science for Sustainability, 128–40. IGI Global, 2017. http://dx.doi.org/10.4018/978-1-5225-1971-3.ch006.

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Organic-Inorganic composite materials (OICs) are used to describe the group of materials synthesized from polymers and inorganic metal alkkoxides. The interests in these materials arised from the need to ‘combine' the physical properties of inorganic glass materials and polymers such that the resultant OICs have the strength of the inorganic glass and flexibiliy of polymeric materials. Sol-gel technique have been the technique of choice due to much of its advantages, in particular the low temperature reaction. This is very important when natural rubber and its derivatives are used as the polymer component of the OICs. Work in our laboratory has demonstrated that OICs form liquid natural rubber (LNR) and 50% epoxidised natural rubber (ENR-50) can be prepared from various metal alkoxides, such silicon, zirconium and titanium. The OICs can be prepared as flexible transparent films, nanofibers and nanobeads. This Chapter will describe the preparation techniques and the properties of these OICs from various compositions of one and more metal alkoxides in both LNR and ENR-50. The applications of these materials in PANI will be briefly described.

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"Formation of Uniform Precipitates from Alkoxides." In Colloidal Silica, 593–602. CRC Press, 2005. http://dx.doi.org/10.1201/9781420028706-46.

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Cauzzi, D., M. Deltratti, M. Devillers, G. Predieri, O. Tirions, and A. Tiripicchio. "Silica-supported bismuth molybdate catalysts obtained by the sol-gel process via silicon alkoxides." In Preparation of Catalysts VII, Proceedings of the 7th International Symposium on Scientific Bases for the Preparation of Heterogeneous Catalysts, 699–706. Elsevier, 1998. http://dx.doi.org/10.1016/s0167-2991(98)80237-1.

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Jolivet, Jean-Pierre. "Titanium, Manganese, and Zirconium Dioxides." In Metal Oxide Nanostructures Chemistry. Oxford University Press, 2019. http://dx.doi.org/10.1093/oso/9780190928117.003.0011.

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The dioxides of titanium (TiO2), manganese (MnO2), and zirconium (ZrO2) are important materials because of their technological uses. TiO2 is used mainly as white pigment. Because of its semiconducting properties, TiO2, in its nanomaterial form, is also used as an active component of photocells and photocatalysis for self-cleaning glasses and cements . MnO2 is used primarily in electrode materials. ZrO2 is used in refractory ceramics, abrasive materials, and stabilized zirconia as ionic conductive materials stable at high temperature. Many of these properties are, of course, dependent on particle size and shape (§ Chap. 1). Dioxides of other tetravalent elements with interesting properties have been studied elsewhere in this book, especially VO2, which exhibits a metal–isolator transition at 68°C, used, for instance, in optoelectronics (§ 4.1.5), and silica, SiO2 (§ 4.1.4), which is likely the most ubiquitous solid for many applications and uses. Aqueous chemistry is of major interest in synthesizing these oxides in the form of nanoparticles from inorganic salts and under simple, cheap, and environmental friendly conditions. However, as the tetravalent elements have restricted solubility in water (§ 2.2), metal–organic compounds such as titanium and zirconium alkoxides are frequently used in alcoholic solution as precursors for the synthesis of TiO2 and ZrO2 nanoparticles. An overview of the conversion of alkoxides into oxides is indicated about silica formation (§ 4.1.4), and since well-documented works have already been published, these compounds are not considered here. The crystal structures of most MO2 dioxides are of TiO2 rutile type for hexacoordinated cations (e.g., Ti, V, Cr, Mn, Mo, W, Sn, Pb) and CaF2 fluorite type for octacoordinated, larger cations (e.g., Zr, Ce), but polymorphism is common. Some dioxides of elements such as chromium and tin form only one crystalline phase. So, hydrolysis of SnCl4 or acidification of stannate [Sn(OH)6]2− leads both to the same rutile-type phase, cassiterite, SnO2. Many other dioxides are polymorphic, especially TiO2, which exists in three main crystal phases: anatase, brookite, and rutile; and MnO2, which gives rise to a largely diversified crystal chemistry.

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Imai, Hiroaki, Junrok Oh, Hirotoki Morimoto, and Hiroshi Hirashima. "Direct deposition methods of silica and silica/organic composite coatings in alkoxide solutions." In Coatings on Glass 1998, 126–31. Elsevier, 1999. http://dx.doi.org/10.1016/b978-044450247-6.50025-4.

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Iijima, Motoyuki. "Surface Modification of Nanoparticles by Silane Alkoxides and Their Application in Silicone-Based Polymer Nanocomposites." In Nanoparticle Technology Handbook, 705–9. Elsevier, 2018. http://dx.doi.org/10.1016/b978-0-444-64110-6.00064-0.

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Conference papers on the topic "Silicon alkoxide"

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Wang, Shiho, Fikret Kirkbir, S. R. Chaudhuri, and Arnab Sarkar. "Accelerated subcritical drying of large alkoxide silica gels." In San Diego '92, edited by John D. Mackenzie. SPIE, 1992. http://dx.doi.org/10.1117/12.132006.

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Sano, Yoji, Shiho Wang, S. R. Chaudhuri, and Arnab Sarkar. "Silica glass monoliths from alkoxide gels: an old game with new results." In San Dieg - DL Tentative, edited by John D. Mackenzie and Donald R. Ulrich. SPIE, 1990. http://dx.doi.org/10.1117/12.22545.

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