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Tesi sul tema "Zirconia"

Autore: Grafiati

Pubblicato: 4 giugno 2021

Ultima modifica: 25 luglio 2025

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1

REIS, SIGNO T. dos. "Caracterizacao eletrica dos compositos zirconia-niobio e zirconia-titanio." reponame:Repositório Institucional do IPEN, 1993. http://repositorio.ipen.br:8080/xmlui/handle/123456789/10349.

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2

Khazeni, Nasser. "Synthesis And Characterization Of Zirconium Tungstate-zirconia Core-shell Composite Particles." Master's thesis, METU, 2013. http://etd.lib.metu.edu.tr/upload/12615316/index.pdf.

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Thermal mismatch between different components of a system could cause of problems like residual stress induced cracking, thermal fatigue or even optical misalignment in certain high technology applications. Use of materials with customized thermal expansion coefficient is a counter-measure to resolve such problems. Zirconium tungstate (ZrW2O8) with negative thermal expansion coefficient is capable of being used in synthesis of composites with tailored coefficient of thermal expansion (CTE). In this work, the sol-gel method which had been already set up in our group was characterized and the so

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3

Cain, Markys G. "Zirconia toughened ceramics." Thesis, University of Warwick, 1990. http://wrap.warwick.ac.uk/35750/.

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The objectives for the thesis were to generate tough ceramics utiising the toughening mechanisms inherent to zirconia materials. The aims have been realised with the successful fabrication of hot pressed silicon nitride / zirconia composite ceramics. The zirconia was prestabilised with two different types of dopant additives, yttria and ceria, with the intention of understanding the chemical compatibility with the silicon nitride matrix and the overall effect on the subsequent mechanical properties. The volume fraction of added zirconia was also varied. The increased toughness over silicon nit

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4

Monaco, Carlo <1967&gt. "Zirconia in dentistry." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2013. http://amsdottorato.unibo.it/5956/1/TESI_MONACO_COMPLETA.pdf.

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The above factors emphasize the scope of this thesis for further investigations on zirconia, the improvement of all-ceramic zirconia restorations, and especially the interaction of zirconia and veneering and its influence on the performance of the whole restoration. The introduction, chapter 1, gave a literature overview on zirconia ceramics. In chapter 2, the objective of the study was to evaluate the effect of abrading before and after sintering using alumina-based abrasives on the surface of yttria-tetragonal zirconia polycrystals. Particular attention was paid to the amount of surf

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5

Monaco, Carlo <1967&gt. "Zirconia in dentistry." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2013. http://amsdottorato.unibo.it/5956/.

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Abstract (sommario):

The above factors emphasize the scope of this thesis for further investigations on zirconia, the improvement of all-ceramic zirconia restorations, and especially the interaction of zirconia and veneering and its influence on the performance of the whole restoration. The introduction, chapter 1, gave a literature overview on zirconia ceramics. In chapter 2, the objective of the study was to evaluate the effect of abrading before and after sintering using alumina-based abrasives on the surface of yttria-tetragonal zirconia polycrystals. Particular attention was paid to the amount of surf

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6

RICCI, DOLORES R. "Otimizacao do processo de obtencao de zirconia via precipitacao do sulfato basico de zirconio." reponame:Repositório Institucional do IPEN, 1989. http://repositorio.ipen.br:8080/xmlui/handle/123456789/10393.

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7

Leghuel, Hatim A. "Radiation Backscatter of Zirconia." The Ohio State University, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=osu1377012297.

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8

Tye, Andrew. "The preparation and characterisation of magnesia-stabilised zirconia and alumina/magnesia-stabilised zirconia composites." Thesis, University of Leeds, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.305440.

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9

Grohmann, Philipp Alfred Charles. "Effect of zirconia surface treatments on the shear strength of zirconia/veneering ceramic composites /." [S.l.] : [s.n.], 2008. http://opac.nebis.ch/cgi-bin/showAbstract.pl?sys=000279108.

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10

Saran, Mohinder. "High temperature strengthening of zirconia." Thesis, University of Oxford, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.504522.

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11

Behrens, Gesa. "The martensitic transformation in zirconia." Case Western Reserve University School of Graduate Studies / OhioLINK, 1993. http://rave.ohiolink.edu/etdc/view?acc_num=case1057156303.

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12

Frazer, Brett Graeme. "Analysis of shock compacted zirconia." Thesis, Queensland University of Technology, 1999.

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13

BERGAMASCHI, VANDERLEI S. "Influencia de parametros de precipitacao nas caracteristicas fisicas e quimicas do carbonato de zirconio." reponame:Repositório Institucional do IPEN, 2000. http://repositorio.ipen.br:8080/xmlui/handle/123456789/10884.

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14

Sciasci, Plínio [UNESP]. "Efeito de tratamento de superfície na composição de zircônia e na resistência de união com diferentes cimentos." Universidade Estadual Paulista (UNESP), 2013. http://hdl.handle.net/11449/97311.

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Made available in DSpace on 2014-06-11T19:28:56Z (GMT). No. of bitstreams: 0 Previous issue date: 2013-03-08Bitstream added on 2014-06-13T20:18:33Z : No. of bitstreams: 1 sciasci_p_me_arafo.pdf: 542826 bytes, checksum: 39a4037cc6365c2fcfc7d2bfaae5f727 (MD5)<br>A zircônia tetragonal policristalina estabilizada por ítria (Y-ZTP), em virtude de suas propriedades mecânicas, pode ser indicada para restaurações dento ou implantosuportadas. Porém, em função de sua composição, este material apresenta dificuldade de se unir eficazmente com os cimentos, comprometendo assim a longevidade das restauraçõ

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15

Adamson, Fiona. "Propagating reaction fronts in zirconia tubes." Thesis, University of Birmingham, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.487432.

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16

Wildan, Muhammad W. "Zirconia-matrix composites reinforced with metal." Thesis, University of Strathclyde, 2000. http://oleg.lib.strath.ac.uk:80/R/?func=dbin-jump-full&object_id=21428.

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The aim of this study was to investigate a zirconia-matrix reinforced with metal powder (chromium, iron and stainless steel (AISI 316)) including processing, characterisation, and measurements of their properties (mechanical, thermal and electrical). Zirconia stabilised with 5.4 wt% Y₂0₃ (3 mol%) as the matrix was first studied and followed by an investigation of the effects of metal reinforcement on zirconia-matrix composites. Monolithic zirconia was pressureless sintered in air and argon to observe the effect of sintering atmosphere, while the composites were pressureless sintered in argon t

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17

With, Patrick C., Sven Fichtner, Bertram Böhringer, et al. "Diffusion in hierarchically structured zirconia spheres." Universitätsbibliothek Leipzig, 2015. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-185485.

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18

With, Patrick C., Sven Fichtner, Bertram Böhringer, et al. "Diffusion in hierarchically structured zirconia spheres." Diffusion fundamentals 16 (2011) 61, S. 1-2, 2011. https://ul.qucosa.de/id/qucosa%3A13804.

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19

Sequeira, Sara Raquel Marques. "Development of zirconia composites for orthopedic." Master's thesis, Universidade de Aveiro, 2015. http://hdl.handle.net/10773/21527.

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Mestrado em Materiais e Dispositivos Biomédicos<br>Zircónia e alumina são biocerâmicos bastante conhecidos, e são usados principalmente em aplicações ortopédicas. Estes materiais têm sido aplicados em implantes de anca e joelho graças à reduzida taxa de desgaste e à excelente biocompatibilidade que apresentam. No entanto, estes cerâmicos apresentam também algumas limitações: a fragilidade da alumina ao impacto e a sensibilidade da zircónia ao envelhecimento. Devido a estas limitações, o objectivo passou por desenvolver implantes mais resistentes e com uma resposta inflamatória menos intensa. S

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20

Holz, Laura Isabel Vilas. "Yttria-stabilized Zirconia with beige colour." Master's thesis, Universidade de Aveiro, 2017. http://hdl.handle.net/10773/21874.

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Mestrado em Engenharia de Materiais<br>A Zircónia é um cerâmico avançado que se tem destacado como um material versátil e promissor, apresentando uma combinação interessante de propriedades térmicas, elétricas, óticas e mecânicas, pouco comuns nos materiais cerâmicos, sendo por isso utilizada em diversas aplicações. A empresa INNOVNANO produz pós de Zircónia com diferentes características e atualmente tem clientes interessados em cerâmicos à base de Zircónia estabilizada com ítria de coloração bege com propriedades mecânicas específicas. Assim, o trabalho realizado neste estágio pretendeu des

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21

Raghupathy, Bala Praveen Chakkravarthy. "Spray freeze-drying of zirconia nanopowder." Thesis, Loughborough University, 2007. https://dspace.lboro.ac.uk/2134/34738.

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Industrial exploitation of ceramic nanopowders is inhibited by their poor flowability and strong tendency to agglomerate. To achieve good flowability and die-filling characteristics, controlled agglomeration is required whilst the strength of the agglomerates is minimised so that they crush into primary particles when die pressed. Yttria stabilised zirconia nanopowders with a primary particle size of ~16 nm were obtained through different drying routes from an aqueous suspension and characterised in terms of flowability and agglomerate strength.

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22

Carter, Geoffrey A. "Controlling precipitation of value added zirconia." Thesis, Curtin University, 2009. http://hdl.handle.net/20.500.11937/1356.

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Advanced zirconia-based materials have many important applications in electronics and medical applications, and of most interest to this research, solid oxide fuel cells (SOFC) which is a key technology for alternative and hydrogen-based energy generation. The SOFC in its most basic form is a device for converting hydrogen and oxygen into water with a resulting generation of power. Most SOFC manufacturers/developers are using zirconia doped with yttria as the electrolyte with variations on the amount of yttria. The SOFC places high demands on the ceramic components, placing significant demands

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23

Vickerfält, Amanda. "Investigation of the possibility for using ZrO2 and ZrSiO4 for Zr additions to liquid ferrosilicon." Thesis, KTH, Materialvetenskap, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-214009.

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Ferrosilicon containing 50-75% Si and 1.0-5.0% Zr is used as inoculant in the cast iron industry. Zr can be added to liquid ferrosilicon by use of Zr metal or zirconium ferroalloy (FeSiZr). Then the recovery of Zr, i.e. the fraction of Zr transferred from the additive to the ferrosilicon, as well as the hit rate on specification is high. The aim of this study was to investigate the recovery of Zr from zircon sand, ZrSiO4, and zirconia, ZrO2, in comparison to zirconium ferroalloy when added to liquid ferrosilicon with 75% Si at 1600⁰C. Also the refining effect of the different additives on Al

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24

Melk, Latifa. "Processing and properties of zirconia-CNT composites." Doctoral thesis, Universitat Politècnica de Catalunya, 2016. http://hdl.handle.net/10803/396100.

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In the last decades there has been growing interest in developing ceramic materials with high fracture toughness (Klc) and strength for structural applications. In the specific case of 3 mol% yttria-doped tetragonal zirconia (3Y-TZP), KIC can be increased by promoting phase transformation from tetragonal (t) to monoclinic (m) phase in front of a propagating crack tip referred to as transformation toughening. However, the stronger the tendency for stress induced transformation, the higher the risk for prematura spontaneous t-m transformation in humid atmosphere. This phenomenon, which is referr

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25

Turón, Viñas Miquel. "Mechanical properties of co-doped zirconia ceramics." Doctoral thesis, Universitat Politècnica de Catalunya, 2018. http://hdl.handle.net/10803/620660.

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Tetragonal polycrystalline zirconia, commonly stabilised with 3 mol% yttria (3Y-TZP), became one of the most interesting ceramics for biomedical applications due to its biocompatibility and high mechanical properties. Among them, its high fracture toughness should be highlighted, which is due to the stress-induced tetragonal-to-monoclinic (t-m) phase transformation near a crack tip. However, the tetragonal grains on the Surface can also spontaneously transform to monoclinic phase in a humid environment, phenomenon known as low-temperature degradation (LTD), which is an important issue for appl

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26

Anazia, Oge. "Chemistry of Zirconia and Its Bioanalytical Applications." TopSCHOLAR®, 2009. http://digitalcommons.wku.edu/theses/127.

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This research studies the chemical nature of zirconia and the complex surface chemistry of zirconia in order to better comprehend its behavior under chromatographic conditions. This research shows how the physical and chemical properties of zirconia depend strongly on the thermal treatment during synthesis. The morphology of the samples was also studied. The absorption capability of Adenosine Triphosphate (ATP) on zirconia was also monitored and spectrally characterized. The results of this research showed how the properties of zirconia vary with thermal treatment. It was observed that the zi

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27

Ghugare, Tushar. "Exploring Zirconia as a Column Packing Material." TopSCHOLAR®, 2010. http://digitalcommons.wku.edu/theses/194.

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Zirconia is one of the most promising column packing materials for High Performance Liquid Chromatography (HPLC). The perfect HPLC support material should be energetically homogenous, have a high surface area on which different chemical species can reversibly attach and be physically and chemically stable over a wide range of pH, temperature and solvent conditions. Most existing supports do not have all of these properties. This project is also focused on a proteomics study. Zirconia, hafnium oxide and titanium oxide which are some of the more promising materials currently available, can be us

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28

Bi, Melody. "Characterization and Catalytic Properties of Sulfated Zirconia." TopSCHOLAR®, 1996. http://digitalcommons.wku.edu/theses/895.

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Sulfated zirconia has attracted extensive attention due to its superactivity to isomerize alkane and alkenes. Platinum or iron/manganese promoted sulfated zirconia has been shown to increase the reaction rate. These catalysts are normally activated to 650-725°C in air before use. Through on-line analysis of evolved gas species during dynamic heating of the catalysts, some significant information can be obtained concerning the activation mechanism. In the present investigation, combined TG-FTIR, TG-MS and TGDTA techniques were utilized to measure the weight loss of the samples, analyze the evol

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29

Al-Shafei, E. N. "Zirconia/titania catalysts for carbon dioxide utilisation." Thesis, University of Huddersfield, 2015. http://eprints.hud.ac.uk/id/eprint/27160/.

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Reaction and conversion of CO2 to chemicals is a challenging area of research. The objective of this work is to study and investigate the use of mixed metal oxide Zr/Ti oxide and related catalysts for the conversion and utilisation of CO2. The first reaction studied was propane dehydrogenation using CO2 to produce propene. Then, the study extended to investigate the direct reaction of CO2 as whole molecule with methane, ethane, acetylene, ethylene and propane to synthesis carboxylic acids. The catalysts were prepared in several ways. Four methods were based on coprecipitation of the mixed cata

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30

Clifton, Andrew Charles. "Novel processing of nanostructured yttria-stabilized zirconia." abstract and full text PDF (free order & download UNR users only), 2006. http://0-gateway.proquest.com.innopac.library.unr.edu/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:1438928.

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31

Paul, Anish. "Processing and properties of nanostructured zirconia ceramics." Thesis, Loughborough University, 2009. https://dspace.lboro.ac.uk/2134/11995.

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The term nanoceramics is well known in the ceramic field for at least two decades. Even though there are many reports that nanoceramics are superior in terms of mechanical and other properties, no comprehensive and conclusive study on the grain size dependent variation in mechanical properties. So this study was an attempt to study the property variation with grain size and yttria content for a well known ceramic, yttria stabilised zirconia. High solids content but low viscosity YSZ nanosuspensions have been slip cast into -52% dense, very homogeneous green bodies in sizes up to 60 mm in diame

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32

Fabris, Stefano. "Atomistic modelling of phase transitions in zirconia." Thesis, Queen's University Belfast, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.322848.

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33

Skillen, Norman William. "Thin films of zirconia deposited by MOCVD." Thesis, University of Salford, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.258342.

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34

Whitney, Michael J. (Michael John). "Transformation-mismatch plasticity in zirconia ceramic composites." Thesis, Massachusetts Institute of Technology, 1997. http://hdl.handle.net/1721.1/43447.

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35

Pietrowski, Marek J., Souza Roger A. De, Umberto Anselmi-Tamburini, Sangtae Kim, Zuhair A. Munir, and Manfred Martin. "Oxygen diffusion in nanocrystalline yttria-stabilized zirconia." Universitätsbibliothek Leipzig, 2015. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-186906.

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36

Xia, X. "Computational modelling study of yttria-stabilized zirconia." Thesis, University College London (University of London), 2010. http://discovery.ucl.ac.uk/20483/.

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Interatomic potential and quantum mechanical simulation techniques have been applied to both the bulk and surfaces of yttrium-stabilized cubic zirconia (YSZ) with special reference to its role in partial oxidation reaction at high temperature. The stabilities of pure ZrO2 phases and surfaces have been examined. The bulk structures of low pressure phases are reproduced with the observed order of stability: monoclinic > tetragonal > cubic zirconia. The relative stability of plane cubic ZrO2 surfaces is predicted to be (111)c > (110)c > (100)c > (310)c. In addition, the stability of topological s

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37

Saunders, Gary J. "Reactions of hydrocarbons in zirconia fuel cells." Thesis, University of Birmingham, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.288890.

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38

Feighery, Alan John. "Zirconia-based electroceramic materials for SOFC applications." Thesis, University of St Andrews, 1999. http://hdl.handle.net/10023/13601.

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The phase relations, electrical properties and structural characteristics of doped cubic stabilised Zirconia based electroceramic materials have been investigated using a number of characterisation techniques. The phase relations of the ternary systems ZrO2 -Y2O3 -TiO2 and ZrO2 -Gd2 O3 - TiO2 at 1500°C have been investigated. Electrical characterisation in air and in low oxygen partial pressures has been carried out using 2-probe A.C. Impedance Spectroscopy and 4-probe D.C. resistivity measurements to ascertain whether compositions within these systems could be utilised as the anode materi

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39

Pietrowski, Marek J., Souza Roger A. De, Umberto Anselmi-Tamburini, Sangtae Kim, Zuhair A. Munir, and Manfred Martin. "Oxygen diffusion in nanocrystalline yttria-stabilized zirconia." Diffusion fundamentals 12 (2010) 54, 2010. https://ul.qucosa.de/id/qucosa%3A13890.

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40

Carabineiro, Hugo. "Structure and catalytic properties of tungstated zirconia." Paris 6, 2005. http://www.theses.fr/2005PA066122.

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41

Serrazina, Ricardo Nazaré. "Emulsion Detonation Synthesis (EDS) zirconia-based CERMETs." Master's thesis, Universidade de Aveiro, 2016. http://hdl.handle.net/10773/21884.

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mestrado em Ciência e Engenharia de Materiais<br>A realização deste trabalho tem como objetivo a produção e caracterização de compósitos de metal em matriz cerâmica (CERMETOS). Assim sendo, e tendo como base pós cerâmicos e compósitos produzidos pela INNOVNANO, foram também produzidos pós por mecanossíntese. Os pós à base de zircónia estabilizada com ítria (YSZ), produzidos por estes dois métodos, foram caracterizados cristalográfica, química, morfológica, reológica, térmica e magneticamente. Os pós foram compactados e sinterizados em vácuo, seguindo-se a sua caracterização, principalmente es

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42

Downs, John Axel. "Mechanisms of Flash Sintering in Cubic Zirconia." Doctoral thesis, Università degli studi di Trento, 2013. https://hdl.handle.net/11572/368928.

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The recently discovered flash sintering technique has shown that the application of a sufficiently large dc electric field (E-field) to a ceramic during sintering can cause sintering at temperatures several hundred degrees below conventional temperatures with sintering rates that allow for sintering in seconds rather than hours. This technique has already been demonstrated in wide range of ceramic materials including ionic conductors, electronic conductors, semi-conductors and insulators. The application of this techniques to a large range of materials and the dramatic lowering of sintering t

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43

Downs, John Axel. "Mechanisms of Flash Sintering in Cubic Zirconia." Doctoral thesis, University of Trento, 2013. http://eprints-phd.biblio.unitn.it/976/1/Downs_Mechanisms_of_Flash_Sintering.pdf.

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Abstract (sommario):

The recently discovered flash sintering technique has shown that the application of a sufficiently large dc electric field (E-field) to a ceramic during sintering can cause sintering at temperatures several hundred degrees below conventional temperatures with sintering rates that allow for sintering in seconds rather than hours. This technique has already been demonstrated in wide range of ceramic materials including ionic conductors, electronic conductors, semi-conductors and insulators. The application of this techniques to a large range of materials and the dramatic lowering of sintering t

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44

Sigwadi, Rudzani Annetjie. "Zirconia, Sulphated Zirconia and Zirconium Phosphates as additives for membranes in PEM Fuel Cell." Thesis, 2019. http://hdl.handle.net/10500/26880.

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This research investigates the impact of zirconia nanoparticle in conductivity, water uptake, fuel crossover and fuel efficiency of modified Nafion® membranes. Synthesized water-retaining mesoporous zirconia nanoparticles (ZrO2) were used to modify Nafion® membrane in order to enhance the thermal properties, water uptake, proton conductivity and mechanical strength of composited membrane for fuel cell applications. Recast and impregnation methods were used to prepare a nanocomposite membrane with required weight% of zirconia nanoparticles. The mechanical stability of modified membranes

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45

Kwela, Zola Nigel. "Alkali-fusion processes for the recovery of zirconia and zirconium chemicals from zircon sand." Diss., 2001. http://hdl.handle.net/2263/22982.

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There are two industrial sources of zirconia: zircon and baddeleyite [1-5]. The baddeleyite reserves in Phalaborwa (the world’s major baddeleyite source) are expected to be depleted by the year 2005 [1-3]. This leaves the Russian Baddleyite (Kola Peninsula) and zircon as the only industrial sources of zirconia. The major drawback to zircon use is the large amounts of impurities it is found concentrated with, especially radioactive impurities (Uranium and Thorium) [2-3]. Acid leaching of zircon does not remove these impurities [4-5]. The impurities are usually included in the zircon lattice. Th

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46

Choudhury, Tanushree H. "Anodized Zirconia Nanostructures." Thesis, 2013. http://etd.iisc.ac.in/handle/2005/3462.

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Electrochemical anodization is a facile technique to synthesize ordered oxide nanostructures. Though the number of materials exhibiting anodized nanostructures has increased considerably in the recent years, only nanoporous alumina and nanotubular titania have been investigated extensively for various applications. Anodized nanostructures, nanotubes and nanopores, of zirconia are also of considerable interest for applications such as templates, sensors and solid-oxide fuel cells. In spite of the potential applications of zirconia, these nanostructures have been barely studied. As most of these

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47

Choudhury, Tanushree H. "Anodized Zirconia Nanostructures." Thesis, 2013. http://etd.iisc.ernet.in/2005/3462.

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Abstract (sommario):

Electrochemical anodization is a facile technique to synthesize ordered oxide nanostructures. Though the number of materials exhibiting anodized nanostructures has increased considerably in the recent years, only nanoporous alumina and nanotubular titania have been investigated extensively for various applications. Anodized nanostructures, nanotubes and nanopores, of zirconia are also of considerable interest for applications such as templates, sensors and solid-oxide fuel cells. In spite of the potential applications of zirconia, these nanostructures have been barely studied. As most of these

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48

"Distributed feedback zirconia and zirconia-ORMOSIL waveguide lasers." 2003. http://library.cuhk.edu.hk/record=b5891528.

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Wang Jun.<br>Thesis (M.Phil.)--Chinese University of Hong Kong, 2003.<br>Includes bibliographical references (leaves 74-79).<br>Abstracts in English and Chinese.<br>Acknowledgements --- p.i<br>List of publications --- p.ii<br>Abstract (In English) --- p.iii<br>Abstract (In Chinese) --- p.v<br>Table of contents --- p.vii<br>List of figures --- p.x<br>List of tables --- p.xiv<br>Chapter Chapter I --- Introduction --- p.1<br>Chapter Chapter II --- Dye-doped sol-gel zirconia and zirconia-organically modified silicate waveguides --- p.6<br>Chapter 2.1 --- General sol-gel process --- p.6<b

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hung, chien chi, and 簡吉鴻. "Silica、Zirconia and Zirconium Silicate Thin Films Prepared by Magnetron Sputtering." Thesis, 2001. http://ndltd.ncl.edu.tw/handle/85817605148903407982.

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碩士<br>國立東華大學<br>材料科學與工程研究所<br>89<br>The developments of future gate oxide of MOS device for ULSI technology and next-generation capacitor of DRAM devices for memory storage require new dielectric materials. There is significant interest in using ZrO2 for the fabrication of charge storage insulators in the next generation memories. In this study, thin films of zirconia, silica, and zirconium silicate were deposited on Si(100) and glass substrates by R.F. magnetron sputtering from zirconia, silica and zirconium silicate composite ceramic targets instead of metal targets. This research

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50

Jan, Ya-Wun, and 詹雅雯. "Grafting of nano-zirconia and electrophoretic deposition of acrylate/zirconia composite film." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/14005022952780485515.

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碩士<br>國立中央大學<br>化學工程與材料工程學系<br>103<br>The synthesis of sub-10 nm zirconia nanocrystals, as well as the dispersion of them in polar and non-polar solvents after proper surface modification, had already been accomplished in our previous studies. By adding comparable resin to the dispersion, we could prepare a transparent composite having 47 vol% ZrO2 nanoparticles and a refractive index of 1.69. Such a high reflection index material is useful as brightness enhancement film for FPD, a simpler lens-stack for cellular phone, or a more efficient second order optical design for the LED lighting syste

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