Relevant bibliographies by topics / Yttrium fluorure

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  1. Journal articles
  2. Dissertations / Theses
  3. Book chapters
  4. Conference papers

Academic literature on the topic 'Yttrium fluorure'

Author: Grafiati
Published: 4 June 2021
Last updated: 6 February 2022

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Journal articles on the topic "Yttrium fluorure"

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Park, Seung Hyun, Kyung Eon Kim, and Sang Jeen Hong. "Surface Analysis of Chamber Coating Materials Exposed to CF4/O2 Plasma." Coatings 11, no. 1 (January 18, 2021): 105. http://dx.doi.org/10.3390/coatings11010105.

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Coating the inner surfaces of high-powered plasma processing equipment has become crucial for reducing maintenance costs, process drift, and contaminants. The conventionally preferred alumina (Al2O3) coating has been replaced with yttria (Y2O3) due to the long-standing endurance achieved by fluorine-based etching; however, the continuous increase in radio frequency (RF) power necessitates the use of alternative coating materials to reduce process shift in a series of high-powered semiconductor manufacturing environments. In this study, we investigated the fluorine-based etching resistance of atmospheric pressure-sprayed alumina, yttria, yttrium aluminum garnet (YAG), and yttrium oxyfluoride (YOF). The prepared ceramic-coated samples were directly exposed to silicon oxide etching, and the surfaces of the plasma-exposed samples were characterized by scanning electron microscopy, energy-dispersive X-ray spectroscopy, and X-ray photoelectron spectroscopy. We found that an ideal coating material must demonstrate high plasma-induced structure distortion by the fluorine atom from the radical. For endurance to fluorine-based plasma exposure, the bonding structure with fluoride was shown to be more effective than oxide-based ceramics. Thus, fluoride-based ceramic materials can be promising candidates for chamber coating materials.
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Grzechnik, Andrzej, and Karen Friese. "Fluorides containing lanthanides and yttrium at extreme conditions." Acta Crystallographica Section A Foundations and Advances 70, a1 (August 5, 2014): C55. http://dx.doi.org/10.1107/s2053273314099446.

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We are interested in crystal structures and stabilities of fluoride materials containing lanthanides and yttrium that are related to the CaF2 structure. These compounds are laser hosts and luminescent materials, oxygen sensors as well as components of solar cells. They exhibit various schemes of (dis)ordering of cations and anions in fluorite superstructures and anion-excess fluorites. In the last few years, we have performed a series of studies on the bulk AMF4 and MF3 materials (A = Li, Na, K; M = Y, lanthanide) at different pressure-temperature conditions. Among them, ordered LiYF4 is a commercial host for solid state lasers, while partially ordered NaYF4 doped with lanthanides is the most efficient material for green and blue up-conversion known to date. In the system KF–YF3, we have studied not only KYF4 [1] but also KY3F10, which is an anion-excess 2×2×2 superstructure of fluorite at atmospheric conditions. At high temperatures and high pressures, it converts to another fluorite superstructure with disordered fluorine atoms. The pressure-induced LaF3 post-tysonite structure is another example of the anion-excess fluorite [2]. Our work on the fluorite-related materials at extreme conditions provides information on their structural instabilities that could further be used to better understand and control their materials properties. For instance, we demonstrated that the NaMF4 up-converters are unstable and that the ordering of the cations and vacancies in their structure is a slow process [3]. Consequently, the order–disorder transformations have a profound influence over the luminescent properties of these materials when doped.
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He, Xianghong, and Bing Yan. "Yttrium hydroxide fluoride based monodisperse mesocrystals: additive-free synthesis, enhanced fluorescence properties, and potential applications in temperature sensing." CrystEngComm 17, no. 3 (2015): 621–27. http://dx.doi.org/10.1039/c4ce01823k.

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Fluorine-containing monodisperse mesocrystals constructed by nanorods were synthesized via an additive-free hydrothermal route and Eu3+ was successfully incorporated into the yttrium hydroxide fluoride host lattice.
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He, Xianghong, Yaheng Zhang, Yu Fu, Ning Lian, and Zhongchun Li. "A Polyol-Mediated Fluoride Ions Slow-Releasing Strategy for the Phase-Controlled Synthesis of Photofunctional Mesocrystals." Nanomaterials 9, no. 1 (December 26, 2018): 28. http://dx.doi.org/10.3390/nano9010028.

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There are only a few inorganic compounds that have evoked as much interest as sodium yttrium fluoride (NaYF4). Its extensive applications in various fields, including transparent displays, luminescence coding, data storage, as well as biological imaging, demand the precise tuning of the crystal phase. Controlling the emergence of the desired α-phase has so far remained a formidable challenge, especially via a simple procedure. Herein, we represented a polyol-assisted fluoride ions slow-release strategy for the rational control of pure cubic phase NaYF4 mesocrystals. The combination of fluorine-containing ionic liquid as a fluoride source and the existence of a polyalcohol as the reactive medium ensure the formation of uniform α-phase mesocrystallines in spite of a higher temperature and/or higher doping level.
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Stefanski, Johannes, and Sandro Jahn. "Yttrium speciation in subduction-zone fluids from ab initio molecular dynamics simulations." Solid Earth 11, no. 3 (May 5, 2020): 767–89. http://dx.doi.org/10.5194/se-11-767-2020.

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Abstract. The rare Earth elements (REEs) are important geochemical tracers for geological processes such as high-grade metamorphism. Aqueous fluids are considered important carriers for the REEs in a variety of geological environments including settings associated with subduction zones. The capacity of a fluid to mobilize REEs strongly depends on its chemical composition and on the presence of suitable ligands such as fluoride and chloride. In this study, we present structural and thermodynamic properties of aqueous yttrium–chloride and yttrium–fluoride species at a temperature of 800 ∘C in a pressure range between 1.3 and 4.5 GPa derived from ab initio molecular dynamics simulations. The total yttrium coordination by H2O and halide ions changes from seven to eight within the pressure range. For the yttrium–chloride species, a maximum number of three chloride ligands was observed. The derived thermodynamic data show that aqueous yttrium–fluoride complexes are more stable than their yttrium–chloride counterparts in chloride- and fluoride-rich environments at conditions relevant to slab dehydration. Mixed Y(Cl,F) complexes are found to be unstable even on the molecular dynamics timescale. Furthermore, in contrast to field observations, thermodynamic modeling indicates that yttrium should be mobilized at rather low fluoride concentrations in high-grade metasomatic systems. These results suggest a rather low fluoride activity in the majority of subduction-zone fluids because yttrium is one of the least-mobile REEs. Additionally, the simulations indicate that yttrium drives the self-ionization of hydration water molecules as it was observed for other high-field-strength elements. This might be a general property for highly charged cations in aqueous solutions under high-temperature and high-pressure conditions.
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Wang, Wei-Kai, Yu-Xiu Lin, and Yi-Jie Xu. "Structural and Fluorine Plasma Etching Behavior of Sputter-Deposition Yttrium Fluoride Film." Nanomaterials 8, no. 11 (November 14, 2018): 936. http://dx.doi.org/10.3390/nano8110936.

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Yttrium fluoride (YF3) films were grown on sapphire substrate by a radio frequency magnetron using a commercial ceramic target in a vacuum chamber. The structure, composition, and plasma etching behavior of the films were systematically investigated. The YF3 film was deposited at a working pressure of 5 mTorr and an RF power of 150 W. The substrate-heating temperature was increased from 400 to 700 °C in increments of 100 °C. High-resolution transmission electron microscopy (HRTEM) and X-ray diffraction results confirmed an orthorhombic YF3 structure was obtained at a substrate temperature of 700 °C for 2 h. X-ray photoelectron spectroscopy revealed a strongly fluorinated bond (Y–F bond) on the etched surface of the YF3 films. HRTEM analysis also revealed that the YF3 films became yttrium-oxyfluorinated after exposure to fluorocarbon plasma. The etching depth was three times lower on YF3 film than on Al2O3 plate. These results showed that the YF3 films have excellent erosion resistance properties compared to Al2O3 plates.
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Wang, Xiu Hui, Jia Tai Dong, Ye Cao, Guo Quan Zhao, Hong Gao, and Jin Long Yang. "Influences of Process Parameters on the Forming of YAG Phase." Applied Mechanics and Materials 164 (April 2012): 65–68. http://dx.doi.org/10.4028/www.scientific.net/amm.164.65.

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Submicron single-phase yttrium aluminum garnet (Y3Al5O12, YAG) powders were fabricated by solid-state reactive heat-treating a mixture of pyrolysis product, heat-treating isopropyl aluminum at 500°C, and yttria (Y2O3) powders. The powders were mixed by ball milling for 2~3 h doped with 5wt% aluminium fluoride (AlF3), and then heat-treated at 1200°C for 2~5 h. Characterized by XRD, mixing the powders by ball milling and doped with AlF3 lowered the heat-treating temperature and made the forming of YAG phase be single.
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Tian, Li, Jin Liu, Fei Yu Chen, and Qi Liang Sun. "Hexagonal NaYF4 Nanotube Arrays Obtained via Solvothermal Process." Advanced Materials Research 554-556 (July 2012): 667–70. http://dx.doi.org/10.4028/www.scientific.net/amr.554-556.667.

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Hexagonal sodium yttrium fluoride has been successfully synthesized via a facile solvothermal route, using yttrium nitrate, sodium fluoride and polyethanediol as raw materials to react in propanetriol solvent. The as-prepared product was characterized by powder X-ray diffraction, scanning electron microscopy, thermogravimetric and differential thermal analysis, Fourier transform infrared spectrum and energy dispersive X-ray spectrum. The characterization results revealed that the products are hexagonal and denoted as NaYF4. The as-synthesized hexagonal sodium yttrium fluoride composed of hollow-structured nanotubes self-assembled and arrayed orientedly to take on bamboo raft morphology. Hexagonal NaYF4 nanotube arrays exhibited high heat stability. This study provides a simple method to prepare bamboo raft-shaped NaYF4 in large scale, which broads their practical applications.
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Köhler, J., A. K. Tyagi, and S. N. Achary. "Crystal structure of lead yttrium fluoride, Pb8Y6F34, a new fluorite-related anion-rich fluoride." Zeitschrift für Kristallographie - New Crystal Structures 217, JG (December 2002): 23. http://dx.doi.org/10.1524/ncrs.2002.217.jg.23.

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Köhler, J., A. K. Tyagi, and S. N. Achary. "Crystal structure of lead yttrium fluoride, Pb8Y6F34, a new fluorite-related anion-rich fluoride." Zeitschrift für Kristallographie - New Crystal Structures 217, no. 1 (December 1, 2002): 23. http://dx.doi.org/10.1524/ncrs.2002.217.1.23.

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Dissertations / Theses on the topic "Yttrium fluorure"

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Makram, Boukhris. "Étude par spectroscopies optiques du composé laser yttrium fluorure de lithium dopé au néodyme." Étude par spectroscopies optiques du composé laser YLiF[4] dopé au néodyme. Sherbrooke : Université de Sherbrooke, 2000.

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Makram, Boukhris. "Étude par spectroscopies optiques du composé laser yttrium fluorure de lithium dopé au néodyme." Mémoire, Université de Sherbrooke, 2000. http://savoirs.usherbrooke.ca/handle/11143/4483.

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Le composé YLiF4 dopé au néodyme possède autour de 9400 cm-1 une section efficace d'émission stimulée très élevée permettant d'obtenir un effet laser important. En outre les spectres optiques révèlent un élargissement relativement important des bandes spectrales. La principale cause de cet élargissement étant liée à la présence de centres optiques secondaires. À l'aide des spectroscopies Raman, d'émission et d'absorption, nous avons pu étudier le comportement de ces structures secondaires en fonction de la concentration en néodyme dans la gamme de fréquence: 100-18000 cm-1. Pour élucider l'origine de ces centres optiques, nous avons utilisé un modèle théorique basé sur l'interaction de paires couplées de manière ferromagnétique et vérifié expérimentalement par des mesures sous champ magnétique.
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Mullot, James. "Contribution à l'étude de l'évolution de l'oxygène et de la microstructure dans les substrats de nitrure d'aluminium à forte conductivité thermique frittés en présence de fluorure d'yttrium." Limoges, 1995. http://www.theses.fr/1995LIMO0031.

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Les substrats de nitrure d'aluminium sont utilises dans l'industrie de la micro-electronique en raison de leur forte conductivite thermique et de leur faible coefficient de dilatation thermique. La conductivite thermique du nitrure d'aluminium varie en fonction de la microstructure mais aussi de la quantite d'oxygene situee dans la phase secondaire et dans le reseau. Pour augmenter cette conductivite, il est necessaire de controler la microstructure, c'est-a-dire la repartition de la phase secondaire et de diminuer les quantites d'oxygene. Afin de reduire la teneur en oxygene, le fluorure d'yttrium est utilise comme ajout. Les dosages d'oxygene mettent en evidence une diminution de l'oxygene du reseau du nitrure d'aluminium. L'utilisation de l'ajout fluore provoque la volatilisation du fluorure d'aluminium et une formation de l'aluminate d'yttrium a plus basse temperature. L'etude de l'influence du cycle de frittage a permis d'etablir que les temperatures de traitement thermique de 1200 et 1400c avant le frittage a 1850c permettent d'obtenir une conductivite thermique de 240 w/m. K. Les conditions d'oxydation du nitrure d'aluminium ont ete mises au point pour realiser une couche d'alumine permettant une bonne adherence du cuivre par la methode direct copper bonding
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Mesnard, Patricia. "Luminescence de Ce3+ et Pr3+ dans les fluorures denses en vue de la réalisation de cristaux scintillateurs à déclin rapide." Phd thesis, Université Sciences et Technologies - Bordeaux I, 1997. http://tel.archives-ouvertes.fr/tel-00169394.

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Dans le cadre d'une recherche de cristaux scintillateurs détecteurs de rayonnements X ou une étude de la luminescence du cérium et du praséodyme dans des composés fluorés denses à été effectuée. L'émission de Ce3+ dans les fluorures BaThF6 et Ba4y3F1-7 présenté pour une excitation directe dans ses niveaux 5d une probabilité radiative élevée, même à forte concentration. L'utilisation du rayonnement synchrotron a permis de déterminer les différents mécanismes d'excitation de l'ion Ce3+. Ce dernier peut-être en particulier excité par une émission intrinsèque au réseau de type cross-luminescence à déclin ultra-rapide (1 ns) mise en évidence dans les deux réseaux. La croissance cristalline de BaThF6:Ce et la caractérisation des propriétés de scintillation ont été entreprises. Une luminescence de l'ion CeS3+ jusqu'à température ambiante a été observée pour la première fois dans des composés fluorés à base d'ion à doublet 6S2. Le rendement est cependant affecté par une forte extinction thermique, conséquence de la proximité des niveaux émetteurs 5D et de la bande de conduction. Dans certains fluorés à champ cristallin fort (elpasolites et Ba4Y3F1-7), la luminescence à déclin rapide 5d 4F de Pr3+ a été mise en évidence. Les mécanismes de scintillation de cet ion dans les elpasolites ont été étudiés.
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Zambon, Daniel. "Etude structurale et optique de la phase linay::(2)f::(8) : tb**(3+), eu**(3+), mecanisme de transfert tb**(3+) -> eu**(3+)." Clermont-Ferrand 2, 1987. http://www.theses.fr/1987CLF21088.

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Etude de la fluorescence. Une serie de composes isotopes de formule generale linaln::(2)f::(8) a ete synthetisee avec des lanthanides de faible rayon ionique (ln = ho -> lu). Un laser a impulsion accordable de largeur spectrale 0,5cm**(-1) a ete utilise pour exciter selectivement dans l'uv ou dans le visible un des niveaux absorbants au-dessus de **(5)d::(4) de l'ion tb**(3+) ou de **(5)d::(0) de l'ion eu**(3+). Mise en evidence d'un transfert d'energie tb**(3+) -> eu**(3+)
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Garnier, Nicolas. "Spectroscopie dans l'état excité des ions terres-rares Nd3+ et Tm3+ et fonctionnement laser multilongueur d'onde du YAG : Nd3+." Saint-Etienne, 1997. http://www.theses.fr/1997STET4020.

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L'ensemble des travaux présentés dans cette thèse a été réalisé dans le cadre du Groupement de recherche matériaux lasers (GDR CNRS n°1148, thème : critère de qualité). Il est issu d'une collaboration entre le Laboratoire Traitement du signal et instrumentation, le Laboratoire Physico-chimie des matériaux luminescents et les entreprises CRISMATEC et BM industrie. Ces travaux ont conduit à la mise en oeuvre de différentes techniques expérimentales permettant la compréhension de divers processus se manifestant par une limitation de l'effet laser dans les cristaux de YAG : Nd3+ (Y3al 5o 1 2 : Nd3+) et YLF : Nd3+ (YLIF4 : Nd3+). Le premier aspect de ces processus est lié à l'ion dopant, ce sont des processus intrinsèques tels que l'absorption dans l'état excité et l'addition de photon par transfert d'énergie conduisant à un dépeuplement du niveau métastable émetteur dans l'infrarouge. Nous avons mis au point différentes expériences à deux faisceaux laser synchronisés (pompe, sonde) permettant l'étude des transitions dans l'état excité tant du point de vue spectral que des sections efficaces. Dans le cas du YLF : Nd3+, ces techniques ont permis la mise en évidence d'un double processus d'addition de photons par transfert d'énergie conduisant à des émissions visibles et ultraviolettes faisant suite à un pompage infrarouge ainsi qu'une double absorption dans l'état excité autour de la longueur d'onde laser (1. 05 m). Nous avons par ailleurs appliqué ces techniques à l'étude de transitions d'absorption dans l'état excité intervenant dans le processus d'avalanche de photons dans l'ion thulium pour différentes matrices (Y3al 5o 1 2, YALO3 et Y2O3). Le second aspect de ces travaux, appliqué au YAG : Nd3+, nous a conduit à envisager l'intervention d'un processus extrinsèque à l'ion dopant lié à la formation de centres colorés après pompage optique. On observe ainsi, après pompage, la diminution d'une bande d'absorption autour de 250 nm n'appartenant pas à l'ion Nd3+, l'apparition d'une bande d'absorption s'étendant depuis le visible jusqu'à l'infrarouge conduisant ainsi à l'augmentation de l'absorption résiduelle à la longueur d'onde laser (1. 064 m), cette absorption résiduelle étant mesurée par une technique interférométrique spécialement développée à cet effet. Le processus envisagé est le changement de Valence d'une impureté (probablement du fer) par piégeage d'un électron libéré dans la matrice YAG sous l'effet du rayonnement ultraviolet des flashes de pompage, processus partiellement réversible, avec la création de centres absorbants sous forte intensité de pompage (phénomène à deux photons) et annihilation (blanchiment) de ces centres sous faible intensité de pompage (phénomène à un photon). L'hypothèse actuelle, quant à la nature de ces centres, serait liée au processus d'oxydo-réduction : Fe3+ + e- Fe2+. Nous avons observé que ces centres colorés avaient une influence sur l'énergie extraite et sur la thermique des barreaux en fonctionnement laser
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Oçafrain, Arlette. "Mise en oeuvre et utilisation de la méthode de l'échangeur thermique (HEM) pour l'obtention de monocristaux à applications spécifiques et de céramiques supraconductrices orientées." Phd thesis, Université Sciences et Technologies - Bordeaux I, 1995. http://tel.archives-ouvertes.fr/tel-00160029.

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L' étude d'une technique originale de croissance cristalline, basée sur l'utilisation d'un échangeur thermique et nommée HEM (Heat Exchanger Method), a été entreprise. Un dispositif expérimental a été développé et optimisé. La modélisation des échanges thermiques a conduit a l'élaboration d'un code de calcul numérique. Ce dernier est valide par confrontation des résultats de la simulation aux données expérimentales obtenues lors de la croissance d'un matériau école, le germanium. Le champ d'application de la technique HEM a alors été étendu à l'obtention de céramiques texturées du supraconducteur à haute température critique YBa2Cu3O7-x. Après une étude de la microstructure des textures, un mécanisme de texturation est proposé. Enfin, des cristaux du compose NaMgF3 (perovskite) sont obtenus par HEM. Leur étude en température, par observation des domaines ferroélastiques et par spectroscopie Raman, révèle l'existence d' une seule transition de phase.
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Basar, Burcin. "Structural, Mechanical, And Biocompatibility Investigations Of Yttrium And Fluoride Doped Nano Hydroxyapatite." Master's thesis, METU, 2009. http://etd.lib.metu.edu.tr/upload/12610331/index.pdf.

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In this study, it was aimed to investigate the structural, mechanical and biological properties of nano hydroxyapatite (HA) doped with yttrium and fluoride with different compositions. HAs were synthesized by precipitation method. After sintering at 900oC, 1100oC or 1300oC for 1 hour, the structural properties of HAs were investigated by XRD, FTIR spectroscopy and SEM. High relative densities (above 88 % of relative density) were achieved after sintering. No second phases were observed in XRD measurements. Hexagonal lattice parameters and unit cell volumes of doped HAs decreased indicating the substitutions of ions. Characteristics absorbtion bands of HA and additional bands due to fluoride substitutions were observed in FTIR patterns. SEM images showed that grain sizes decreased with increasing doping amounts and decreasing sintering temperatures. Discs prepared by cold pressing were sintered at 900oC, 1100oC and 1300oC for 1 hour to determine mechanical properties. Mechanical properties of HAs were found to be directly related to the sintering temperatures and amount of dopings. Biocompatibility of pure and doped HA discs was assessed with in vitro cytotoxicity studies. Cell attachment, proliferation and differentiation state of cells were studied using MTT, ALP and calcium assays and SEM. Cell attachment and proliferation were enhanced with dopings and increasing sintering temperatures. The highest ALP production and calcium deposition were observed on HAs sintered at 1100oC. In vitro studies revealed that 1100oC was the sintering temperature for best cell responses. Specifically, 2.5YFHA seemed to be promising as an alternative for pure HA among all doped HAs.
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Douysset, Laurence. "Etude de couches minces monocristallines élaborées par épitaxie en phase liquide pour applications laser dans le visible : croissance et caractérisation de couches de LiYF4 dopé terres rares." Université Joseph Fourier (Grenoble), 1998. http://www.theses.fr/1998GRE10048.

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Actuellement, de nombreuses equipes de recherche travaillent sur les sources laser bleues qui pourraient avoir un grand nombre d'applications. Le developpement de guides d'onde monocristallins apparait etre une approche interessante. En effet ce type de structure permet d'associer les proprietes des cristaux, a savoir des sections efficaces d'emission elevees, avec des effets de guidage et de confinement permettant de diminuer le seuil laser. Dans l'objectif d'obtenir des lasers guides d'onde fonctionnant par des mecanismes d'up-conversion, nous avons realise des couches minces monocristallines de liyf#4 dope terres rares (nd#3#+ ou tm#2#+) par epitaxie en phase liquide, sur des substrats monocristallins de liyf#4 non dope. La premiere partie de ce manuscrit decrit donc la croissance et la caracterisation physico-chimique des couches ainsi obtenues. Le probleme essentiel rencontre lors de la croissance de ces materiaux est leur tres grande reactivite vis a vis de l'oxygene et donc la formation d'une phase parasite genante pour les applications recherchees. La croissance de ces couches necessite donc des conditions de croissance tres severes (appareillage specifique, tres grande purete des matieres premieres, atmosphere controlee). Cette technique de croissance a permis d'obtenir des couches fortement concentrees en neodyme (jusqu'a 8% at. ). Le codopage des couches par du gadolinium a permis d'augmenter la difference d'indices entre la couche et le substrat et donc d'ameliorer le guidage. La deuxieme partie du manuscrit est consacree aux caracterisations optiques de ces couches : absorption, emission, dynamique de fluorescence. Nous avons egalement mis en evidence l'avalanche de photons, mecanisme d'up-conversion base sur une absorption a partir d'un etat excite. Ce mecanisme presente l'avantage de ne necessiter qu'un seul faisceau de pompe de lumiere rouge ou infrarouge pour obtenir une emission dans le visible (violet ou bleu dans le cas du neodyme ou du thulium). Nous avons donc etudie la dynamique de la fluorescence emise a 413 nm pour l'ion neodyme et a 450 ou 480 nm pour l'ion thulium. Un effet laser a ete obtenu a 1,05 m pour les couches dopees au neodyme. Les tests laser realises dans le bleu n'ont permis pour l'instant que d'obtenir une intense fluorescence bleue en mode guide.
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Toker, Sidika Mine. "An Investigation Of Microstructure, Microhardness And Biocompatibility Characteristics Of Yttrium Hydroxyapatite Doped With Fluoride." Master's thesis, METU, 2010. http://etd.lib.metu.edu.tr/upload/12611540/index.pdf.

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The aim of this study was to investigate the microstructure, microhardness and biocompatibility properties of nano hydroxyapatite (HA) doped with a constant yttrium (Y3+) and varying fluoride (F-) compositions. HA was synthesized via precipitation method and sintered at 1100&
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C for 1 hour. Increased densities were achieved upon Y3+ doping while F- doping led to a decrease in densities. For structural analysis, XRD, SEM and FTIR spectroscopy examinations were performed. No secondary phases were observed in XRD studies upon doping. Lattice parameters decreased due to substitutions of ions. In SEM analysis, addition of doping ions was observed to result in smaller grains. In FTIR analysis, in addition to the characteristic bands of HA, novel bands indicating the substitution of F- ions were observed in F- ion doped samples. The highest microhardness value was obtained for the sample doped with 2.5%Y3+, 1%F-. Increased F- ion contents resulted in decreased microhardness values. For biocompatibility evaluation, in vitro tests were applied to the materials. MTT assay was performed for Saos-2 cell proliferation analysis. Y3+ and F- ion incorporation was found to improve cell proliferation on HA discs. Cells were found to attach and proliferate on disc surfaces in SEM analysis. ALP assay showed differentiation of cells on the discs can be improved by doping HA with an optimum amount of F- ion. Dissolution tests in DMEM revealed that structural stability of HA was improved with F- ion incorporation. The material exhibiting optimum structural, mechanical and biocompatibility properties was HA doped with 2.5%Y3+, 1%F-.
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Book chapters on the topic "Yttrium fluorure"

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Bowlby, B. E., and B. Di Bartolo. "Spectroscopy of Trivalent Praseodymium in Barium Yttrium Fluoride." In Structure and Bonding, 193–208. Berlin, Heidelberg: Springer Berlin Heidelberg, 2004. http://dx.doi.org/10.1007/b11313.

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Jiao, Lina, Shihua Wang, Fuhao Xiong, Guangyao Chen, Zhihe Dou, Xionggang Lu, and Chonghe Li. "Deoxidation of TiAl Alloy Scraps with Metallic Yttrium and Calcium Fluoride Slag." In TMS 2020 149th Annual Meeting & Exhibition Supplemental Proceedings, 1691–99. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-36296-6_156.

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Wetter, N. U. "Neodymium doped lithium yttrium fluoride (Nd:YLiF 4 ) lasers." In Handbook of Solid-State Lasers, 323–40. Elsevier, 2013. http://dx.doi.org/10.1533/9780857097507.2.323.

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Conference papers on the topic "Yttrium fluorure"

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Liu, Stephen, Craig Clasper, Keith Moline, and Joe Scott. "Ultra-Low Hydrogen Consumables for Welding of High Strength Steels With 690–750 MPa-Yield Strength." In 25th International Conference on Offshore Mechanics and Arctic Engineering. ASMEDC, 2006. http://dx.doi.org/10.1115/omae2006-92633.

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Two fundamental concepts in welding consumable development were explored in this research. The first concept dealt with the introduction of yttrium-containing oxides into the weld metal for microstructural control and hydrogen trapping. The second concept suggested the use of fluoride species to displace hydrogen from the arc. Combining yttrium and fluorides into one single flux-cored consumable to capture the benefit of hydrogen reduction from both ingredients, however, proved to be difficult. The oxygen potential controlled by yttrium clashed with the fluorine potential controlled by KF. Several iterations led to the successful reconciliation of the oxygen potential and fluorine potential and the development of a new generation of flux-cored consumables with exceptional performance. Using CO2 as shielding gas, these consumables successfully produced welds that contained only 0.6 ml H2/100 g weld metal. With a duplex martensite-acicular ferrite microstructure, a weld metal with yield strength of 99 ksi and tensile strength of 108 ksi was obtained. The weld metal exhibited excellent ductility, 21.8% elongation. Impact toughness exceeded the −60 °F requirement by 88%, reaching values of 76 ft-lb. Charpy-V-notch energy at 0 °F testing temperature measured an outstanding average of 89 ft-lbs. Consumables designed using the two fundamental concepts have demonstrated great capability of producing high strength steel welds that met stringent mechanical performance requirements.
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Storm, Mark E., and John P. Deyst. "High Gain Amplification in Holmium-Doped Yttrium Lithium Fluoride." In Advanced Solid State Lasers. Washington, D.C.: OSA, 1992. http://dx.doi.org/10.1364/assl.1992.ml3.

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Zhou, Xuezhe, Paden B. Roder, Bennett E. Smith, and Peter J. Pauzauskie. "Laser refrigeration of rare-earth doped sodium-yttrium-fluoride nanowires." In SPIE OPTO, edited by Richard I. Epstein, Denis V. Seletskiy, and Mansoor Sheik-Bahae. SPIE, 2017. http://dx.doi.org/10.1117/12.2253568.

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Pedrini, C., A. Brenier, J. Rubin, R. Moncorge, and B. Moine. "Excited State Dynamics Of Erbium, Thulium, Holmium Ions In Lithium Yttrium Fluoride And Fluoride Glasses." In French-Israeli Workshop on Solid-State Lasers, edited by Georges Boulon, Christian K. Jorgensen, and Renata Reisfeld. SPIE, 1989. http://dx.doi.org/10.1117/12.981472.

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Zhu, Ren-Yuan. "Yttrium-doped barium fluoride crystals for future HEP experiments (Conference Presentation)." In Hard X-Ray, Gamma-Ray, and Neutron Detector Physics XX, edited by Michael Fiederle, Arnold Burger, Ralph B. James, and Stephen A. Payne. SPIE, 2018. http://dx.doi.org/10.1117/12.2322016.

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Padron-Wells, Gabriel, Michael VanOverloop, Junghyeon Yeo, Avun Abit, Kevin Finneran, Lenore Mclaughlin, and Ryan Greuter. "Fluorine Saturated Yttrium (YF) Based Coatings for Advanced Semiconductor ULSI Manufacturing." In 2019 30th Annual SEMI Advanced Semiconductor Manufacturing Conference (ASMC). IEEE, 2019. http://dx.doi.org/10.1109/asmc.2019.8791799.

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Furuya, Y., H. Tanaka, N. Kawaguchi, Y. Yokota, T. Yanagida, M. Nikl, and A. Yoshikawa. "Crystal growth and scintillation properties of lithium potassium yttrium complex fluoride." In 2010 IEEE Nuclear Science Symposium and Medical Imaging Conference (2010 NSS/MIC). IEEE, 2010. http://dx.doi.org/10.1109/nssmic.2010.5873753.

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Luntz-Martin, Danika R., R. Greg Felsted, Siamak Dadras, Peter J. Pauzauskie, and A. Nick Vamivakas. "Laser Refrigeration of Sodium Yttrium Fluoride Nanoparticles in a Vacuum Optical Tweezer." In CLEO: QELS_Fundamental Science. Washington, D.C.: OSA, 2021. http://dx.doi.org/10.1364/cleo_qels.2021.fth2p.2.

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Toker, S. Mine, Zafer Evis, and Aysen Tezcaner. "Investigation of microstructure, microhardness and biocompatibility characteristics of yttrium and fluoride doped hydroxyapatite." In 2010 15th National Biomedical Engineering Meeting (BIYOMUT 2010). IEEE, 2010. http://dx.doi.org/10.1109/biyomut.2010.5479795.

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Guo, Zhen. "Q switching of a diode laser pumped neodymium-doped yttrium lithium fluoride laser." In 17th Congress of the International Commission for Optics: Optics for Science and New Technology. SPIE, 1996. http://dx.doi.org/10.1117/12.2316048.

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