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Tesis sobre el tema "Glass doping"

Autor: Grafiati
Publicado: 11 de marzo de 2023

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1

Banyai, William Charles. "Optical nonlinearities in semiconductor doped glass channel waveguides." Diss., The University of Arizona, 1988. http://hdl.handle.net/10150/184505.

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The nonlinear optical properties of a semiconductor-doped glass (SDG) channel waveguide were measured on a picosecond time-scale; namely, fluence-dependent changes in the absorption and the refractive index as well as the relaxation time of the nonlinearity. Slower, thermally-induced changes in the refractive index were also observed. The saturation of the changes in the absorption and the refractive index with increasing optical fluence is explained using a plasma model with bandfilling as the dominant mechanism. The fast relaxation time of the excited electron-hole plasma (20 ps) is explaine
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2

Sedani, Salar Habibpur. "Fabrication And Doping Of Thin Crystalline Si Films Prepared By E-beam Evaporation On Glass Substrate." Master's thesis, METU, 2013. http://etd.lib.metu.edu.tr/upload/12615628/index.pdf.

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In this thesis study, fabrication and doping of silicon thin films prepared by electron beam evaporation equipped with effusion cells for solar cell applications have been investigated. Thin film amorphous Si (a-Si) layers have been fabricated by the electron beam evaporator and simultaneously doped with boron (B) and phosphorous (P) using effusion cells. Samples were prepared on glass substrates for the future solar cell operations. Following the deposition of a-Si thin film, crystallization of the films has been carried out. Solid Phase Crystallization (SPC) and Metal Induced Crystallization
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3

Gordo, Vanessa Orsi [UNESP]. "Estudo das propriedades estruturais e ópticas do sistema vítreo 80TeO2-20WO3 dopado com Yb2O3." Universidade Estadual Paulista (UNESP), 2010. http://hdl.handle.net/11449/91979.

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Made available in DSpace on 2014-06-11T19:25:33Z (GMT). No. of bitstreams: 0 Previous issue date: 2010-06-28Bitstream added on 2014-06-13T18:28:59Z : No. of bitstreams: 1 gordo_vo_me_ilha.pdf: 1058796 bytes, checksum: 2c8438704796726349dfe606c2595b4b (MD5)<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)<br>Neste trabalho foi estudado o sistema vítreo (100-x)% (80% TeO2-20% WO3)-(x)% Yb2O3, onde x = 0; 0,1; 0,2; 0,3; 0,4 e 0,5%. As técnicas de difração de raios-X, espectroscopia no infravermelho, espectroscopia Raman e espectroscopia no UV-Vis foram usadas para caracter
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4

Hubert, Mathieu. "Chalcogenide Glasses for Infrared Applications: New Synthesis Routes and Rare Earth Doping." Diss., The University of Arizona, 2012. http://hdl.handle.net/10150/223357.

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Chalcogenide glasses and glass-ceramics present a high interest for the production of thermal imaging lenses transparent in the 3-5 μm and 8-12 μm windows. However, chalcogenide glasses are conventionally synthesized in sealed silica ampoules which have two major drawbacks. First, the low thermal conductivity of silica limits the sample dimensions and second the silica tubes employed are single use and expensive, and represent up to 30% of the final cost of the material. The present work therefore addresses the development of innovative synthesis methods for chalcogenide glass and glass-cerami
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5

Rajbhandari, Prashant. "Advanced NMR characterization of the effect of Al2O3, B2O3 and SiO2 doping on low-Tg phosphate based glass." Thesis, Lille 1, 2013. http://www.theses.fr/2013LIL10069/document.

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Les verres de phosphates à faible Tg et forte stabilité thermique sont étudié dans le système (66-x)ZnO- xNa2O-33.4 P2O5. Les mesures DSC ont montré un écart Tx-Tg de 197 °C et une Tg de 339 °C pour x= 20. La RMN 31P 1D/2D révèle la diminution du désordre due à la substitution progressive de Zn par Na. Les formulations x=20 et x=33 ont été dopé par de l’Al2O3, B2O3 et SiO2 (1-4 % mol.) et ses effets sur les propriétés physiques comme la température de transition vitreuse, la stabilité thermique et la durabilité chimique ont été investiguées. La DRX et la RMN 31P ont été réalisés pour suivre le
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6

Gordo, Vanessa Orsi. "Estudo das propriedades estruturais e ópticas do sistema vítreo 80TeO2-20WO3 dopado com Yb2O3 /." Ilha Solteira : [s.n.], 2010. http://hdl.handle.net/11449/91979.

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Orientador: Keizo Yukimitu<br>Banca: José Brás Barreto Oliveira<br>Banca: Noelio Oliveira Dantas<br>Resumo: Neste trabalho foi estudado o sistema vítreo (100-x)% (80% TeO2-20% WO3)-(x)% Yb2O3, onde x = 0; 0,1; 0,2; 0,3; 0,4 e 0,5%. As técnicas de difração de raios-X, espectroscopia no infravermelho, espectroscopia Raman e espectroscopia no UV-Vis foram usadas para caracterizar os efeitos da dopagem sobre as propriedades estruturais e ópticas dos vidros estudados. Usando os dados de espectroscopia na região espectral ultravioleta-visível foi possível observar que não houve mudança das freqüênci
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7

Paradisi, Andrea. "Ultra-high carrier modulation in two dimensions through space charge doping : graphene and zinc oxide." Thesis, Paris 6, 2016. http://www.theses.fr/2016PA066297/document.

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La modulation de la densité de charge est un aspect important de l'étude de les transitions de phase électroniques ainsi que des propriétés électroniques des matériaux et il est à la base de plusieurs applications dans la micro-électronique. L'ajustement de la densité des porteurs de charge (dopage) peut être fait par voie chimique, en ajoutant des atomes étrangers au réseau cristallin du matériau ou électrostatiquement, en créant un accumulation de charge comme dans un Transistor é Effet de Champ. Cette dernier m ethode est réversible et particuliérement appropriée pour les matériaux bidimens
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8

Chanda, Sheetal Kumar. "Copper doped window layer for CdSe solar cells." [Tampa, Fla] : University of South Florida, 2008. http://purl.fcla.edu/usf/dc/et/SFE0002794.

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9

Acharya, Krishna Prasad. "Photocurrent Spectroscopy of CdS/Plastic, CdS/Glass, and ZnTe/GaAs Hetero-pairs Formed with Pulsed-laser Deposition." Bowling Green State University / OhioLINK, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1245089031.

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10

Bossard, Cédric. "Elaboration et caractérisation d’un hybride organominéral à base de polycaprolactone et de bioverre sous forme de mousse macroporeuse pour la régénération osseuse." Thesis, Université Clermont Auvergne‎ (2017-2020), 2018. http://www.theses.fr/2018CLFAC068/document.

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L’accroissement de l’espérance de vie s’accompagne d’une détérioration de l’état de santé général des seniors et d’une recrudescence des maladies chroniques. Parmi les manifestations de la sénescence, l’atteinte de l’appareil locomoteur est particulièrement invalidante et accélère considérablement l’entrée en dépendance. C’est également le cas chez les plus jeunes lors d’atteintes traumatiques ou pathologiques. Ainsi, au niveau mondial 2,2 millions de greffes osseuses sont pratiquées chaque année, mais le taux de complications post-opératoires demeure élevé et est estimé à 15 % des interventio
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11

JAGOSICH, FABIO H. "Estudos dos processos de transferência de energia dos íons de Ersup(3+) e Hosup(3+) para os íons de Ndsup(3+), Tbsup(3+) e Eusup(3+) no cristal de LiYFsub(4) e no vidro ZBLAN para a otimização de meios laser ativos que operam na região de 3 microns." reponame:Repositório Institucional do IPEN, 2006. http://repositorio.ipen.br:8080/xmlui/handle/123456789/11432.

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Made available in DSpace on 2014-10-09T12:51:51Z (GMT). No. of bitstreams: 0<br>Made available in DSpace on 2014-10-09T14:06:32Z (GMT). No. of bitstreams: 0<br>Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)<br>Tese (Doutoramento)<br>IPEN/T<br>Instituto de Pesquisas Energeticas e Nucleares - IPEN/CNEN-SP<br>FAPESP:00/11446-0
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12

Carroll, Donna L. "A multi-analytical investigation into glass dopant incorporation." Thesis, University of Warwick, 2008. http://wrap.warwick.ac.uk/2892/.

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The influence of various dopants on the properties and local structure of glass samples was explored and a quantitative determination of the structural changes in the network as the dopant concentration was varied was achieved using 27Al, 29Si, 33S MAS NMR. Findings showed that silver- and copper-doping of phosphate based glass gave rise to unexpected connectivity between the phosphate units most likely due to some phase separation creating a different composition to that intended in the majority glass. This emphasises the importance of a careful and systematic approach to sample manufacture i
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13

Poirot, Isabelle. "Etude du neptunium dans un verre borosilicate." Grenoble 2 : ANRT, 1986. http://catalogue.bnf.fr/ark:/12148/cb376004621.

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14

Martins, Rodrigues Ana Candida. "Synthèse et propriétés électriques de verres oxydes conducteurs par ion lithium." Grenoble INPG, 1988. http://www.theses.fr/1988INPG0010.

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L'etude porte sur la variation de la conductivite electrique des systemes borotellurates et borophosphates suivants : lio::(2)-b::(2)o::(3)-te::(2)o::(4) et li::(2)o-b::(2)o::(3)-p::(2)o::(6)-lix (x=f, cl, br). L'effet de formateur mixte pour le premier systeme et l'effet de sel dopant dans le second systeme ont ete interpretes a l'aide de la theorie de l'electrolyte faible et d'un modele de solutions regulieres
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15

Acapito, Francesco d'. "Étude structurale de verres silicates dopés au cuivre et à l'argent." Université Joseph Fourier (Grenoble ; 1971-2015), 1997. http://www.theses.fr/1997GRE10105.

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Dans ce travail nous avons analyse de petits agregats metalliques en verre dans le but d'en determiner les proprietes structurales, leur lien avec la reponse optique et l'influence de l'ordre locale sur les proprietes de diffusion des metaux dans les verres alkalino-silicates. - verres silicates implantes cu : la structure des agregats de cu formes par implantation ionique dans la silice amorphe a ete etudiee au point de vue morphologique et locale. Les techniques de diffusion et diffraction de rayons x en incidence rasante ont ete utilisees et ont permis de determiner la taille des particules
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16

Atmani, Hassane. "Investigations dans le domaine des comportements thermiques de matériaux désordonnés : application au sélénium et aux mélanges Se-Bi à faible concentration en bismuth." Rouen, 1988. http://www.theses.fr/1988ROUES009.

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17

LIN, HSING-HUI, and 林幸輝. "Effect of Zirconia Doping on the Properties of Soda-lime Glass." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/k5xnrc.

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碩士<br>國立聯合大學<br>材料科學工程學系碩士班<br>106<br>As glass products become more and more popular, they also produce more glass waste, and how to recycle these materials has always been an important issue. From the perspective of a circular economy, if these glass wastes can be used as raw materials for the next process, the raw material cost of the process can be reduced and the amount of waste glass can be reduced. In this study, the recovered soda-lime glass is used, and it is desirable to use it as an alkali-resistant glass fiber by adding a zirconium-containing oxide during remelting to enhance the re
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18

Chien, Wei-Chueh, and 簡緯玨. "The Effects of Doping Glass Powder on Sintering and Properties of ZnO." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/3t2p2t.

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碩士<br>義守大學<br>材料科學與工程學系<br>103<br>This research is studied the effect of glass doping on the densification behavior and electrical properties of ZnO ceramics. The adding glass powder is ranged from 1 to 10 wt%. The glass doped ZnO ceramics is hot-pressed at sintering temperature of 1000°C to 1200°C under 150 kN pressure in a N2 atmosphere. The resultant data showed that addition of glass increased the densification rate and grain size of ZnO ceramics. The liquid phase of glass dopant assisted the densification of ZnO ceramics at lower sintering temperature. In addition, hot-pressing also promo
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19

Sun, Cheng-Kai, and 孫宸楷. "The Effects of Doping Glass Powder on Sintering and Properties of SnO2." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/mkr6ct.

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碩士<br>義守大學<br>材料科學與工程學系<br>103<br>A unique glass composition based on GeO2, MoO3 and V2O5 was designed to act as sintering aid to enhance the densification and to adjust the electrical properties of SnO2. This allows the low temperature processing of approximately 950 ◦C to be feasible with a desirable electrical property. The effect of metal oxide glass concentration on the densification behavior and electrical properties of SnO2 was investigated by Archimedes'' principle, x-ray diffractometer (XRD), scanning electron microscopy (SEM) techniques. The addition of glass was found not to affect
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20

Chiang, Chih-Chun, and 江志鈞. "EFFECTS OF RARE EARTH DOPING ON THE MICROSTRUCTURE AND LUMINESCENCE CHARACTERISTICS OF GLASS." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/48841247415569606319.

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博士<br>大同大學<br>材料工程學系(所)<br>98<br>In recent years, luminescent glass materials have attracted great attention, especially application for the solid state laser and amplifier devices. In various glass systems, phosphate glass has been widely studied because of it has high solubility of rare earth and low melting/forming temperatures. Moreover, some literatures reported that formation of microstructure in the glass matrix can change the environment of rare earth (such as in glass and crystalline phase). Photoluminescence intensity can be enhanced due to the light-scattering effect in the microstr
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21

HUANG, LI-YU, and 黃立宇. "Fabricating Excellent Full-Spectrum of White LEDs by Doping Phosphor into Encapsulant and Covering Glass Phosphor Piece." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/d2xxnc.

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22

Chen, Guang-Yu, and 陳光宇. "Improvement of microwave dielectric properties of diopside-based glass-ceramics employing ceramic doping and electrode co-firing process." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/95kz8g.

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碩士<br>國立臺灣科技大學<br>機械工程系<br>107<br>This study focuses on a novel microwave dielectric material - diopside (CaMgSi2O6) glass-ceramic. Diopside material has a unique character of low dielectric constant (k), low cost, high quality factor (Qxf value) and lower than 900℃ sintering temperature. Therefore, diopside is a potential candidate material for LTCC (Low Temperature Co-fired Ceramic) process. However, the negative temperature coefficient of resonance frequency (τf) is too large to be applied in microwave dielectric components. In this case, MgTiO3 was chosen to compensate the large negative t
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23

Chen, Pao-Sheng, and 陳寳升. "Doping of Tantalum and Nitrogen in Zr-Cu-Al-Ag Thin Film Metallic Glass for Improved Thermal and Mechanical Properties." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/49467610135590179692.

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碩士<br>國立清華大學<br>材料科學工程學系<br>100<br>Owing to the unique properties, such as excellent mechanical performance, and nano-scale surface roughness, metallic glass can be applied in various novel fields. Meanwhile, the improvement of thermal stability and hardness is the common target in these applications. Minor alloying is an effective method to enhance the thermal and mechanical properties of metallic glasses. Different from elements used to be doped into metallic glass, the role nitrogen atoms play in metallic glass is quite distinct and critically important, owing to its strong electronegativit
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24

LEE, WEI-MING, and 李偉銘. "Characterizations and analyses of thickness-, pressure-, and doping-dependent ZnO:B films grown on glass substrates by a low-pressure chemical vapor deposition." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/7sgn3n.

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25

Rai, Shishir K. "Zinc diffusion in GaAsSb from spin-on glass dopant sources." 2004. http://etd.nd.edu/ETD-db/theses/available/etd-12152004-143702/.

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26

CHEN, YING-HSIN, and 陳穎興. "Ag-Diffusion, Microstructures, and Electrical Properties of Al2O3-and SiO2-dopings in LTCC CaO-Al2O3-B2O3-SiO2 Glass." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/4wr53y.

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碩士<br>明志科技大學<br>機械工程系機械與機電工程碩士班<br>105<br>In recent years, microwave dielectric materials and components such as filters, resonators, high-frequency antenna, medium antenna, medium guided wave circuit, etc. have been developed rapidly. In addition, high-frequency microwave substrate had been widely applied in different high-frequency communication systems. To effective cost reduction, low temperature co-firing ceramic (LTCC) technology is developed for fabrication of microwave dielectric materials and components. However, the silver diffusion happens easily during sintering for a co-firing wit
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27

Pattanayak, Pulok. "Thermal And Electrical Properties Of Silver And Iodine Doped Chalcogenide Glasses." Thesis, 2008. http://hdl.handle.net/2005/865.

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Silver containing chalcogenide glasses have been extensively studied during the last few decades; the main interest in these materials being their electrical conductivity which changes by several orders of magnitude upon silver doping. Glassy chalcogenides doped with silver have applications in optical elements, gratings, micro-lenses, waveguides, bio & chemical sensors, solid electrolytes, batteries, etc. Chalcohalide glasses have become important in the recent times, from both scientific & technological points of view, due to the interesting properties exhibited by these glasses such as the
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