Relevant bibliographies by topics / Zirconia

Academic literature on the topic 'Zirconia'

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Published: 4 June 2021
Last updated: 22 June 2024

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Journal articles on the topic "Zirconia"

1

Karlina, Elin, Nina Djustiana, I. Made Joni, Renny Febrida, Camellia Panatarani, and Akhyar Dyni Zakyah. "Analisis Mikrostruktur Partikel Zirkoniakalsia-silika (ZrO 2 -CaO-SiO ) Dari Pasir Zirkon Alam Indonesia Menggunakan Metode Spray Pyrolysis." Jurnal Material Kedokteran Gigi 6, no. 1 (March 1, 2017): 23. http://dx.doi.org/10.32793/jmkg.v6i1.261.

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Indonesian Natural Sand, Zircon, is an Indonesia’s natural resource that contains zirconia, silica, titania and alumina. In Dentistry, zirconia as one of the content in natural zircon sand, have the potential to be the material for filler composites. The purpose of this research was to analyze the Zirconia-Calcium-Silicate Particle (ZrO2CaO-SiO2) synthesized from Indonesia natural sand, zircon, in microstructural way. Methods: By synthesizing ZirconiaCalcium-Silicate particle (ZrO2-CaO-SiO2) from Indonesia natural zircon sand, using spray pyrolysis method. A precursor solution that is used consists of zirconil nitrate (Zr (NO3) 2), sodium silicate (Na2SiO3), and calcium hydroxide (Ca (OH) 2). Variations in the temperature of the reactor that are used were 4000C, 4500C, and 5000C with a feed rate of 6 L / min and a piezoelectric frequency of 1.7 MHz. Result showed that the better content in zirconia-calcium-silicate is the one that was synthesized at a temperature of 4500C, based on the results of EDS, SEM and XRD. The composition that is obtained in the zirconia-calcium-silicate particle has a ratio of 1: 14: 4 with the size of 500-1000nm, and has a tetragonal crystal zirconium silicate structure and dicalcium monoclinic silicate. From this research it can be concluded that the result that was synthesized at a temperature of 4500C is adequate to use as a filler based on the characterization result of SEM and XRD.
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Li, Bing Qiang, Yao Shu, Wen Bin Dai, and Jing Kun Yu. "Effect of Zirconia, Zirconite and Zircon Mullite Additives on the Properties of Alumina Castable." Applied Mechanics and Materials 151 (January 2012): 346–49. http://dx.doi.org/10.4028/www.scientific.net/amm.151.346.

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The effect of the zirconia, zirconite, and zircon mullite additives on the properties of alumina-spinel castable has been investigated in present work. Results showed that the density of castables calcined at 110oC with the addition of zirconia and zirconite was higher than that of zircon mullite. With the increasing amount of additives, the densities of castables added with zirconia and zirconite were increased and that added with zircon mullite had not obviously difference. The apparent porosities of castables heated at 1600oC for 1h were about twice of those calcined at 110oC. The bulk densities of castables heated at 1600oC were lower than those calcined at 110oC. All the samples were expanded and the increasing amount of additives led to higher expansion rate. Though the densities of castables heated at 1600oC were lower than those calcined at 110oC, the cold crushing strength were much higher. When the amount of zirconia was less than 4maa%, the addition of zirconia was beneficial to improve the bending strength, and the addition of 4mass% zirconia led to the 18.2% improvemnt at the strength.
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Stankovic, Jovan, Slobodan Milonjic, and Slavica Zec. "The influence of chemical and thermal treatment on the point of zero charge of hydrous zirconium oxide." Journal of the Serbian Chemical Society 78, no. 7 (2013): 987–95. http://dx.doi.org/10.2298/jsc121010149s.

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Two zirconia samples were prepared by precipitation from aqueous zirconium oxychloride and zirconil sulphate solutions with potassium hydroxide. The prepared zirconia samples were amorphous. The pHpzc values of zirconia samples, determined from NaCl and NaNO3 solutions, were 6.6 ? 0.1 and 6.9 ? 0.1, respectively. After prolonged hydration of zirconia in doubly distilled water, pHpzc decreased to 4.7 ? 0.3. Crystallization into tetragonal (metastable) + monoclinic zirconia appeared at 691 K. Above 873 K, tetragonal metastable phase changes to monoclinic one. It was shown that crystallite sizes of zirconia treated at 673 - 1273 K increased from 9.5 nm to 40.5 nm, respectively. The increase in temperature from 385 K to 1070 K increased the pHpzc of zirconia samples from 6.6 to 9.0, respectively.
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Meor Sulaiman, Meor Yusoff, Khaironie Mohamed Takip, and Ahmad Khairulikram Zahari. "In Situ XRD Study of Zirconia Phase Transformation Produced from Chemical and Mineral Processes." Materials Science Forum 840 (January 2016): 375–80. http://dx.doi.org/10.4028/www.scientific.net/msf.840.375.

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The high temperature phase transition of zirconia produced from commercial zirconyl chloride chemical was compared with that produced from a Malaysian zircon mineral. Zirconyl chloride was produced from zircon by using the hydrothermal fusion method. Initial XRD diffractogram of these samples at room temperature show that they are of amorphous structure. High temperature XRD studies was then performed on these samples; heated up to 1500°C. The XRD diffractograms shows that the crystalline structure of tetragonal zirconia was first observed and the monoclinic zirconia becomes more visible at higher heating temperature.
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Subuki, Istikamah. "Influence on Ratio of NaOH/ZrSiO4 in Alkali Fusion for Amang Zircon Sand." ASM Science Journal 17 (November 25, 2022): 1–10. http://dx.doi.org/10.32802/asmscj.2022.1093.

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Amang Zircon Sand from Amang Onn Sdn. Bhd. mineral company has a high composition of zirconium at 61.63 wt% and low silicon composition at 4.90 wt%. The high composition of zirconium in Amang zircon sand indicates the possibility to synthesise it into a zirconia. Zirconium was synthesised using alkali fusion method with different ratio of NaOH/ZrSiO4 to determine the optimum ratio based on the zirconium yield. Alkali fusion method is coupled with thermal treatment as it will produce a higher yield of zirconium with lower impurities. Then it will be leached with deionised water and hydrochloric acid (HCl). The synthesised zirconium was characterised through X-Ray fluorescence (XRF) spectroscopy, X-Ray diffraction (XRD) and particle size distribution (PSD) analysis. The XRF analysis after the fusion and thermal treatment shows a high composition of zirconium as well as great reduction of silicon. 1.2NaOH/ZrSiO4 is determined to be the optimum ratio as it has the lowest silicon impurity of 2.11 wt% and high yield of zirconium at 71.40 wt%. The low impurities will reduce the chance of cracking and maximising the efficiency of zirconia. It is supported by XRD patterns that are dominated by high zirconium peaks. The zirconium oxychloride obtained after acid leaching has a high zirconium composition. This shows that it is possible to use Amang zircon sand as a precursor to synthesis a zirconia using alkali fusion method with sodium hydroxide.
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Yashima, Masatomo, Taka-aki Kato, Masato Kakihana, Mehmet Ali Gulgun, Yohtaro Matsuo, and Masahiro Yoshimura. "Crystallization of hafnia and zirconia during the pyrolysis of acetate gels." Journal of Materials Research 12, no. 10 (October 1997): 2575–83. http://dx.doi.org/10.1557/jmr.1997.0342.

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Hafnia and zirconia gels were prepared by drying hafnyl or zirconyl acetate solutions. Hafnia and zirconia gels contain both hydroxyl group and bidentate acetates which are directly bonded to the metal ions. Thermal decomposition and crystallization behavior of the gels were investigated through XRD, FT-IR, and TEM. Hafnium-containing gels crystallized directly into stable monoclinic hafnia around 500–540 °C, while zirconium-containing gels first formed metastable tetragonal zirconia around 450 °C. The dissimilar crystallization behavior of the gels into metastable, tetragonal zirconia or into stable, monoclinic hafnia can be explained through the difference in free-energy changes of the tetragonal-to-monoclinic phase transformation.
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Djustiana, Nina, Renny Febrida, Camellia Panatarani, Yuliafanny Imarundha, Elin Karlina, and I. Made Joni. "Microstructure Analysis of Zirconia-Alumina-Silica Particles Made from Indonesia Natural Sand Synthesized Using Spray Pyrolysis Method." Key Engineering Materials 720 (November 2016): 285–89. http://dx.doi.org/10.4028/www.scientific.net/kem.720.285.

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Zircon sand is one of Indonesian natural resource that is potential to be used as composite filler. Natural zircon sand can be found in several places in Indonesia, i.e. Riau Islands, Bangka-Belitung, and the Borneo. Zircon sand contains zirconia compound; while ZrO2 is the oxide crystal of zirconia compound. The mechanical and esthetical supremacy of zirconia is the reason why the usage of zirconia as nanocomposite filler mixed with alumina and silica increases. Spray pyrolysis method was used to synthesized natural zircon sand of Indonesia with temperature variety of 400°C, 500°C and 600°C. Spray pyrolysis decomposed zircon sand into powder in nano-sized. Microstructure analysis conducted were SEM, EDS, and XRD. SEM analysis showed that the morphology of particle was spherical, uniform, and regular with size of 100-500nm. EDS and XRD showed best results at the temperature of 400°C. Analysis result of EDS indicated that the largest atomic percentage was owned by sodium with ratio of Zr:Al:Si of 1:2:54 at temperature of 400°C. The XRD pattern of 400°C revealed that the crystal structure of zirconium silicate (ZrSiO4) was tetragonal, the structure of quartz (SiO2) was trigonal, and the structure of corundum aluminum oxide (Al2O3) was rhombohedral. Synthesis of zirconia-alumina-silica particles from natural zircon sand of Indonesia could be used as composite filler based on the characterization results.
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He, Yong Wu, Rui Sheng Wang, Jing Long Bu, Jun Xing Chen, and Zhi Fa Wang. "A Study on Crystallization of Fused Silica/Zirconia Ceramic Composites." Advanced Materials Research 652-654 (January 2013): 286–89. http://dx.doi.org/10.4028/www.scientific.net/amr.652-654.286.

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Fused silica particles and zirconyl chloride were used as main raw material. Meanwhile, ammonia was used as precipitator and polyethylene glycol as dispersant. Firstly, the composite powders were prepared by wet chemical synthesis. Then, fused silica/zirconia ceramic composites containing zirconia with different contents (5%, 15%, 25%, 35% and 45%) were fabricated in reduction atmosphere at 1300°C, 1350°C and 1400°C for 1 h. The thermal expansion ratios and XRD of samples were examined. The analysis of XRD indicated that the cristobalite peaks intensity of sample with more zirconia is lower at the same sintering temperature, and the intensity of cristobalite was higher while sintered at higher temperature. Zircons were found in all samples’ XRD patterns. The results of thermal expansion ratios showed the ratios of samples with more zirconia were lower, especially at higher sintering temperature. So, existence of zirconia can inhibit crystallization of fused silica/zirconia ceramic composites effectively.
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Yamagata, Chieko, João B. Andrade, Valter Ussui, Nelson Batista de Lima, and José Octavio Armani Paschoal. "High Purity Zirconia and Silica Powders via Wet Process: Alkali Fusion of Zircon Sand." Materials Science Forum 591-593 (August 2008): 771–76. http://dx.doi.org/10.4028/www.scientific.net/msf.591-593.771.

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Zircon sand was reacted with liquid caustic soda (50% NaOH) in open vessel at 600 oC for 2h. The effect of NaOH/ZrSiO4 reactant ratio on the yield of zirconia recovery was verified. Samples of fusion products water washed were characterized by X-ray diffraction (XRD) to identify the main compounds formed. Silica powders were obtained via acid catalyzed reaction and zirconia powders were resulted from crystallization of zirconium oxychoride. Both zirconia and silica powders were analyzed by XRF (X-ray fluorescence) and BET method. Laser Quasi Elastic Light Scattering (QLS) technique was used for agglomerate size distribution determination. High purity and fine zirconia and silica powders were obtained. The specific surface area of zirconia calcined at 550 oC reached ~ 70m2g-1. Silica powder calcined at 800 oC presented a high specific surface area ~ 500 m2g-1.
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Subuki, Istikamah, Mimi Fazzlinda Mohsin, Muhammad Hussain Ismail, and Fazira Suriani Mohamed Fadzil. "Study of the Synthesis of Zirconia Powder from Zircon Sand obtained from Zircon Minerals Malaysia by Caustic Fusion Method." Indonesian Journal of Chemistry 20, no. 4 (June 10, 2020): 782. http://dx.doi.org/10.22146/ijc.43936.

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The zircon powder from Zircon Minerals Malaysia is a pure premium grade zircon sand milled 1.5 µm that contain ZrSiO4, ZrO2, HfO2, SiO2, Al2O3, TiO2, and Fe2O3. The monoclinic zirconia powders were synthesized from the zircon sand of Zircon Minerals Malaysia, by caustic fusion method at calcination temperatures between 500 °C to 800 °C. The as-synthesized zirconia was characterized through X-Ray diffraction (XRD), scanning electron microscopy (SEM), thermogravimetric and differential thermal analysis (TG-DTA), and X-Ray fluorescence (XRF) techniques. The XRD results show two monoclinic phases of microcrystalline zirconia. Zirconia that was calcined at 600 °C obtained the highest value of ZrO2, which was 54.48%; followed by zirconia calcined at 700 °C, 800 °C, and 500 °C, which obtained the ZrO2 values of 53.58%, 52.41%, and 51.53%, respectively, based on the XRF analysis. As-synthesized zirconia showed monoclinic phases where the surface areas were 0.0635 m2/g, 0.135 m2/g, 0.0268 m2/g, and 0.0288 m2/g, for zirconia calcined at temperatures of 500 °C, 600 °C, 700 °C, and 800 °C, respectively. The surface structure of the powder that had been calcined at 600 C showed similarities with the commercial zirconia. The similarities of the synthesized zirconia and commercial zirconia showed that the zirconia powder could be synthesized using zircon sand by caustic fusion method, even though the content of zirconia was lower compared to that of the commercial zirconia powder.
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Dissertations / Theses on the topic "Zirconia"

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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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Instituto de Pesquisas Energeticas e Nucleares - IPEN/CNEN-SP
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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 sources of the factors imposing impurities in the product were distinguished in all the steps of precursor preparation and heat treatment. In the second part of study, zirconium tungstate particles synthesized by the sol-gel method were utilized as core in synthesis of ZrW2O8&ndash
ZrO2 core&ndash
shell composite particles. Shell layer was composed of ZrO2 nanocrystallites and precipitated from an aqueous solution by urea hydrolysis. Volume of the shell was effectively controlled by concentration of the initial zirconium ion in the solutions. The rate of precipitation was a function of the ratio of initial urea concentration to zirconium ion. It is hypothesized that isolation of the ZrW2O8 within a layer of ZrO2, will be a key element in solving problems associated with reactivity of ZrW2O8 towards other components in sintering of ceramic&ndash
ceramic composites with tuned or zero thermal expansion coefficient.
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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 nitride materials alone was attributed to the toughening agents inherent to zirconia which existed either in the form of the tetragonal polymorph or the monoclinic variant. The toughening modes were dependent on initial chemistry of the composite system. When the zirconia was prestabilised with yttria the tetragonal polymorph was retained within the composite. The enhanced toughness was attributed to a transformation toughening mechanism. However, when the zirconia was prestabiised with ceria the depletion of Ce from solid solution with the zirconia during processing resulted in the formation of the unstabiised monoclinic variant. The enhanced toughness was attributed, in this case, to a microcrack type energy absorption mechanism, similar to several ZTA composite ceramics. Additionally, an experiment using ultrasound non-destructive testing, indicated that Tetragonal Zirconia Polycrystals (TZP) is ferroelastic and, as such, can provide a significant contribution to enhanced levels of fracture toughness in these materials or composites containing the same. Further work has been conducted to actually observe, as a function of applied unia.xial stress, the crystallographic changes occurring within the bulk of a 3Y-TZP ceramic via neutron elastic scattering at the ILL, Grenoble, France. This experiment has provided clear direct proof of the ferroelastic nature of zirconia. A similar experiment will be carried out at the Rutherford Laboratory, though with significantly improved statistics. An approach to improve the high temperature properties of TZP via the chemical alteration of the grain boundary phase was also considered. As a preliminary step the grain boundary volume was increased through controlled additions of the grain boundary composition in the form of both a premilled and a premelted glass. Poor fired densities were attained, however, due to the solute additive partitioning from the generation of an enhanced grain boundary phase to overstabilisation of the zirconia resulting in the formation of cubic stabilised zirconia. Furthermore, the incorporation of nitrogen within the grain boundary phase, via sintering TZP with sole additions of A1N, resulted in the attainment of poor fired densities and hence was not considered a suitable method for grain boundary modification.
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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 surface stress–assisted phase transformation (tetragonal→monoclinic) and the presence of microcracks. Chapter 3 is based on the idea that the conventional sintering techniques for zirconia based materials, which are commonly used in dental reconstruction, may not provide a uniform heating, with consequent generation of microstructural flaws in the final component. As a consequence of the sintering system, using microwave heating, may represent a viable alternative. The purpose of the study was to compare the dimensional variations and physical and microstructural characteristics of commercial zirconia (Y-TZP), used as a dental restoration material, sintered in conventional and microwave furnaces. Chapter 4 described the effect of sandblasting before and after sintering on the surface roughness of zirconia and the microtensile bond strength of a pressable veneering ceramic to zirconia.
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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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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 surface stress–assisted phase transformation (tetragonal→monoclinic) and the presence of microcracks. Chapter 3 is based on the idea that the conventional sintering techniques for zirconia based materials, which are commonly used in dental reconstruction, may not provide a uniform heating, with consequent generation of microstructural flaws in the final component. As a consequence of the sintering system, using microwave heating, may represent a viable alternative. The purpose of the study was to compare the dimensional variations and physical and microstructural characteristics of commercial zirconia (Y-TZP), used as a dental restoration material, sintered in conventional and microwave furnaces. Chapter 4 described the effect of sandblasting before and after sintering on the surface roughness of zirconia and the microtensile bond strength of a pressable veneering ceramic to zirconia.
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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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IPEN/D
Instituto de Pesquisas Energeticas e Nucleares - IPEN/CNEN-SP
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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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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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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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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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Books on the topic "Zirconia"

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Arnold, Bożena. Zircon, Zirconium, Zirconia - Similar Names, Different Materials. Berlin, Heidelberg: Springer Berlin Heidelberg, 2022. http://dx.doi.org/10.1007/978-3-662-64269-6.

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R, Stevens. Zirconia and zirconia ceramics. 2nd ed. Manchester, U.K: Magnesium Elektron Ltd, 1986.

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Zirconia. New York, NY: Fence Books, 2001.

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Minnis, Chelsey. Zirconia. New York, NY: Fence Books, 2001.

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E, Fletcher Andrew, and Mitchell Market Records, eds. Zirconia. 3rd ed. Oxford, UK: Elsevier Advanced Technology, 1993.

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M, Ondik Helen, McMurdie Howard F. 1905-, American Ceramic Society, and Phase Equilibria Diagrams Data Center (U.S.), eds. Phase diagrams for zirconium and zirconia systems. Westerville, Ohio: American Ceramic Society, 1998.

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Meriani, S., and C. Palmonari, eds. Zirconia’88. Dordrecht: Springer Netherlands, 1989. http://dx.doi.org/10.1007/978-94-009-1139-0.

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Zirconia, '88 (Conference) (Bologna Italy). Zirconia '88: Advances in zirconia science and technology. London: Elsevier Applied Science, 1989.

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R, Stevens. Zirconia and zirconia ceramics: Written for Magnesium Elektron. 2nd ed. Twickenham, Middx: Magnesium Elektron Ltd., 1986.

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Meriani, S. Zirconia'88: Advances in Zirconia Science and Technology. Dordrecht: Springer Netherlands, 1989.

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Book chapters on the topic "Zirconia"

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Arnold, Bożena. "Zirconia: A Synthetic Gemstone." In Zircon, Zirconium, Zirconia - Similar Names, Different Materials, 95–98. Berlin, Heidelberg: Springer Berlin Heidelberg, 2022. http://dx.doi.org/10.1007/978-3-662-64269-6_21.

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Graeve, Olivia A. "Zirconia." In Ceramic and Glass Materials, 169–97. Boston, MA: Springer US, 2008. http://dx.doi.org/10.1007/978-0-387-73362-3_10.

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Nakajima, Yasushi. "Zirconia." In Encyclopedia of Polymeric Nanomaterials, 1–3. Berlin, Heidelberg: Springer Berlin Heidelberg, 2015. http://dx.doi.org/10.1007/978-3-642-36199-9_378-1.

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Nakajima, Yasushi. "Zirconia." In Encyclopedia of Polymeric Nanomaterials, 2609–11. Berlin, Heidelberg: Springer Berlin Heidelberg, 2015. http://dx.doi.org/10.1007/978-3-642-29648-2_378.

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Gooch, Jan W. "Zirconia." In Encyclopedic Dictionary of Polymers, 825. New York, NY: Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4419-6247-8_13014.

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Arnold, Bożena. "Zirconium: A Hardly Known Metal." In Zircon, Zirconium, Zirconia - Similar Names, Different Materials, 21–27. Berlin, Heidelberg: Springer Berlin Heidelberg, 2022. http://dx.doi.org/10.1007/978-3-662-64269-6_6.

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Arnold, Bożena. "The Constant Confusion: An Introduction." In Zircon, Zirconium, Zirconia - Similar Names, Different Materials, 1–3. Berlin, Heidelberg: Springer Berlin Heidelberg, 2022. http://dx.doi.org/10.1007/978-3-662-64269-6_1.

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Arnold, Bożena. "The Crystal World of Zirconium Oxide." In Zircon, Zirconium, Zirconia - Similar Names, Different Materials, 53–57. Berlin, Heidelberg: Springer Berlin Heidelberg, 2022. http://dx.doi.org/10.1007/978-3-662-64269-6_13.

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Arnold, Bożena. "Zirconium Oxide and the Lambda Sensor." In Zircon, Zirconium, Zirconia - Similar Names, Different Materials, 85–88. Berlin, Heidelberg: Springer Berlin Heidelberg, 2022. http://dx.doi.org/10.1007/978-3-662-64269-6_19.

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Arnold, Bożena. "Zirconium Oxide in Technology." In Zircon, Zirconium, Zirconia - Similar Names, Different Materials, 75–82. Berlin, Heidelberg: Springer Berlin Heidelberg, 2022. http://dx.doi.org/10.1007/978-3-662-64269-6_17.

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Conference papers on the topic "Zirconia"

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Suzuki, M., S. Sodeoka, and T. Inoue. "Study on Zircon-Based Ceramic Coating for High Temperature Oxidation Resistant Application." In ITSC2001, edited by Christopher C. Berndt, Khiam A. Khor, and Erich F. Lugscheider. ASM International, 2001. http://dx.doi.org/10.31399/asm.cp.itsc2001p0049.

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Abstract Zircon is widely used as a refractory material, because of its excellent mechanical and chemical properties. Several studies on plasma sprayed zircon were reported since 70's, and it is known that zircon dissociate into silica and zirconia during the plasma spray process. Authors have been studied on plasma sprayed zircon for a protective coating application, and successfully obtained very dense coating with excellent adhesive strength by optimizing the spray parameter. However, it was also revealed that the coating had poor stability above 1500K. In this study, the effects of two different oxides additive (yttria and ceria) on the structure and stability of the plasma sprayed zircon coating above 1500K are evaluated. The addition of these oxides enhanced the amount of residual zirconia and decreased zircon after the heat treatments. Addition of yttria resulted in the coating composed of cubic zirconia and zircon, while monoclinic zirconia was formed by ceria addition.
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Sun, Guocheng, Shi Lin, Xu Wang, and Liutao Chen. "Study of Pre-Oxidization Law and Fretting Wear Resistance of CZ2 Alloy Cladding." In 2022 29th International Conference on Nuclear Engineering. American Society of Mechanical Engineers, 2022. http://dx.doi.org/10.1115/icone29-93804.

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Abstract In the core of pressurized water nuclear reactor, coolant flow-induced vibration of Grid to rod fretting (GTRF) is the dominant factor leading to fuel rod damage. pre-oxidization treatment of zirconium cladding forming a ceramic layer on its surface is the main way to reduce the GTRF wear. In this paper, the growth law of CZ2 alloy cladding pre-oxidization zirconia ceramic layer formed in air was studied. The micro-hardness and elastic modulus of CZ2 alloy cladding and zirconia ceramic layer were measured by in-situ nano-mechanical testing system., while the morphology of these pre-oxidization zirconia ceramic layer were observed by scanning electron microscope. The fretting wear properties of the pre-oxidization zirconia ceramic layer were studied by high temperature and high pressure fretting wear tests. The results show that the pre-oxidization zirconia ceramic layer growth law of CZ2 alloy cladding at 560°C and 600°C is consistent, and the pre-oxidization zirconia ceramic layer are compact and crack-free. The pre-oxidization zirconia ceramic layer can improve the fretting wear resistance of CZ2 alloy cladding at high temperature and high pressure, and the maximum wear depth were reduced by 80%.
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Suzuki, M., S. Sodeoka, and T. Inoue. "Zircon-Based Ceramics Composite Coating for Environmental Barrier Coating." In ITSC2007, edited by B. R. Marple, M. M. Hyland, Y. C. Lau, C. J. Li, R. S. Lima, and G. Montavon. ASM International, 2007. http://dx.doi.org/10.31399/asm.cp.itsc2007p0523.

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Abstract Studies on plasma spraying of zircon (ZrSiO4) have been carried out by the authors as one of the candidates for an environmental barrier coating (EBC) application, and had reported that substrate temperature is one of the most important factors to obtain crack-free and highly-adhesive coating. In this study, several amount of yttria were added to zircon powder, and the effect of the yttria addition on the structure and properties of the coatings were evaluated in order to improve the stability of the zircon coating structure at elevated temperature. The coatings obtained were composed of yttria stabilized zirconia (YSZ), glassy silica, while the one prepared from monolithic zircon powder composed of the metastable high temperature tetragonal phase of zirconia and glassy silica. After the heat treatment over 1473K, silica and zirconia formed zircon in all the coatings. However, the coatings with the higher amount of yttria had less amount of zircon formed. This resulted in the less open porosity of the coating at elevated temperature. These yttria added coatings also showed good adhesion even after the heat treatment, while monolithic zircon coating had pealed off.
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Wang, Dazhi, Xiangqian Xiu, Chunlin Song, Weng Huimin, Wang Zheng, and Honggao Tang. "Structure of Zirconia Precursor." In Proceedings of the 7th Asian Conference. WORLD SCIENTIFIC, 2000. http://dx.doi.org/10.1142/9789812791979_0101.

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Lima, R. S., U. Senturk, C. C. Berndt, and C. R. C. Lima. "Spraying Characteristics of Nanostructured Zirconia Particles." In ITSC 1999, edited by E. Lugscheider and P. A. Kammer. Verlag für Schweißen und verwandte Verfahren DVS-Verlag GmbH, 1999. http://dx.doi.org/10.31399/asm.cp.itsc1999p0190.

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Abstract In this paper, the processes as well as the first results regarding the economic efficiency and plasma fuel properties of nanostructured zirconium oxide powder particles are explained. The paper evaluates values for porosity, hardness, roughness, and crystallite size. In addition, both the morphology of the powder particles and the spatter are analyzed by SEM, and cross sections of the coatings are observed using optical microscopy. These results are compared to coatings made from a commercially available yttria stabilized zirconia powder. Paper includes a German-language abstract.
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Stöver, D., G. Pracht, H. Lehmann, M. Dietrich, J. E. Döring, and R. Vaßen. "New Material Concepts for the Next Generation of Plasma-Sprayed Thermal Barrier Coatings." In ITSC2003, edited by Basil R. Marple and Christian Moreau. ASM International, 2003. http://dx.doi.org/10.31399/asm.cp.itsc2003p1455.

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Abstract For the application as a thermal barrier coating (TBC) the partially stabilized zirconia approaches some limits of performance, which hardly can be overcome in the near future. To further enhance the efficiency of gas turbines, higher temperature and a longer lifetime of the coating are needed for the next generation of TBC´s. This paper presents the development of new materials and concepts for application as TBC. Materials such as compositions with pyrochlore structure or doped zirconias are compared with new concepts like nanolayer between top- and bondcoat, metal-glass composites and double layer structures. One concept is to use new compositions in a combination with zirconia, as a double, multi or graded layer coating. In this case the benefits of zirconia will be combined with the promising properties of the new top-coating. For the concept of metal glass composites the influences of different plasma spraying processes on the microstructure are described. The quality of these coating systems are evaluated by a burner rig test.
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Khor, K. A., and Y. Li. "Novel ZrO2-Mullite Composites Produced by Plasma Spraying." In ITSC 1998, edited by Christian Coddet. ASM International, 1998. http://dx.doi.org/10.31399/asm.cp.itsc1998p1233.

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Abstract Zirconia can induce enhanced fracture toughness to a number of ceramics when introduced as a reinforcement either in the form of particulates, dispersed phase or whiskers because of its unique tetragonal-monoclinic transformation. This paper presents the preparation of ZrO2 reinforced mullite by plasma spraying a mixture of zircon and alumina. The dissociation of zircon into zirconia and silica in a plasma flame is well-known. Pre-mixed powders of zircon and alumina are injected into a dc plasma jet. The plasma sprayed particles are collected in distilled water and analyzed. The results indicate that the plasma sprayed powders consist of zirconia, zircon and alumina. It was found that fine, mostly amorphous and chemically homogeneous composite powders can be obtained by ball milling and plasma spraying. Recrystallization of amorphous phases and formation of mullite occurred at about 1000 °C in plasma sprayed powders. This value is more than 500 °C lower than the formation of mullite in as-milled powders. Uniform coatings with good structural integrity were obtained by plasma spraying. The amount of amorphous phases was much higher in plasma sprayed coatings than in spheroidized powders, and the relative quantity of mullite in coatings after heat treatment is about 4 times as much as that obtained in the spheroidized powders.
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Toplan, N., F. Ustel, H. O. Toplan, and G. Erdogan. "Mullite-Zircon Thermal Barrier Coating Production by Plasma Spraying Process." In ITSC2008, edited by B. R. Marple, M. M. Hyland, Y. C. Lau, C. J. Li, R. S. Lima, and G. Montavon. Verlag für Schweißen und verwandte Verfahren DVS-Verlag GmbH, 2008. http://dx.doi.org/10.31399/asm.cp.itsc2008p1001.

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Abstract Zircon (ZrSiO4) is a technologically important oxide ceramic material known for its high refractoriness and chemical stability. It shows excellent thermal shock resistance as a result of its very low thermal expansion coefficient and a low heat conductivity coefficient. Plasma spraying is a convenient method to produce large area coatings with high growth rates, necessary for many applications. ZrSiO4 is among the least expensive spraying materials for refractory applications. In this study, a single-step process was used to prepare mullite/zirconia ceramic composites by plasma spraying zircon/alumina mixtures. Mixtures of ZrSiO4 and Al2O3 powders with Al2O3 to SiO2 molar ratios of 3:2 were milled for 2 h in a zirconia medium using a ball mill. The as–milled powders were dried in the furnace and sintered at 1300 and 1350 °C for 2h then crushed to a size less than 100 μm. The powders were sprayed by an atmospheric plasma spray gun (Metco 3MB) using C/C+SiC ceramic matrix composite substrates. Scanning electron microscopy (SEM) was used to analyze the microstructures of the powders and plasma coatings. The phase composition analysis of the powder showed the presence of alumina and zircon. After plasma coating, alumina, zircon, and zirconia phases were determined.
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Burgos Trillo, Jean Franco, Bruno Agostinho Hernandez, Vicente Gerlin Neto, Cesar Foschini, and EDSON CAPELLO SOUSA. "FINITE ELEMENT MODELLING AND STRUCTURAL ANALYSIS OF ZIRCONIA AND ZIRCONIA-CNT COMPOSITE MATERIALS." In XI Congresso Nacional de Engenharia Mecânica - CONEM 2022. ABCM, 2022. http://dx.doi.org/10.26678/abcm.conem2022.con22-0800.

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Raison, P. E. "Actinide-zirconia based materials for nuclear applications: Cubic stabilized zirconia versus pyrochlore oxide." In Plutonium futures-The science (Topical conference on Plutonium and actinides). AIP, 2000. http://dx.doi.org/10.1063/1.1292246.

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Reports on the topic "Zirconia"

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Jansen, H. J. F. Theoretical studies of zirconia and defects in zirconia. Final report. Office of Scientific and Technical Information (OSTI), November 1995. http://dx.doi.org/10.2172/132732.

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Traczinski, Adriana, Felipe Carvalho de Macêdo, Ivete Aparecida de Mattias Sartori, and José Mauro Granjeiro. Advantages and limitations related to the rehabilitation of edentulous jaw with implant supported prostheses made of monolithic zirconia: systematic review. INPLASY - International Platform of Registered Systematic Review and Meta-analysis Protocols, January 2022. http://dx.doi.org/10.37766/inplasy2022.1.0111.

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Review question / Objective: P: edentulous maxillary arch; I: Full arch rehabilitation with monolithic zirconia or veneered prosthesis retained by implants; C: none; O: Biomechanical complications (framework fracture, chipping, complications, advantages, limitations); S: RCT, nor randomized clinical trials. Condition being studied: Biomechanical complications resulting from the oral rehabilitation of edentulous maxillary arch through the use of implant-supported full arc prostheses made of monolithic zirconia. Eligibility criteria: Total edentulous maxillary arch patients; rehabilitated with implants; monolithic zirconia prostheses with full contour or vestibular face with application of feldspathic ceramics or full veneered or with segmented zirconia crowns; the condition of the opposing arch must be described; the number of maxillary implants that support the prosthesis must be a minimum of 4 implants.
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Raman, S. V., R. Bopp, T. A. Batcheller, and Q. Yan. Zirconia solubility in boroaluminosilicate glass. Office of Scientific and Technical Information (OSTI), December 1995. http://dx.doi.org/10.2172/188530.

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Shetty, D. Alumina reinforced tetragonal zirconia (TZP) composites. Office of Scientific and Technical Information (OSTI), January 1990. http://dx.doi.org/10.2172/6903642.

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Chui, Chi On. Zirconia-germanium interface photoemission spectroscopy using synchrotron radiation. Office of Scientific and Technical Information (OSTI), April 2005. http://dx.doi.org/10.2172/839877.

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Worrell, W. L. Zirconia-based electrodes for solid oxide fuel cells. Office of Scientific and Technical Information (OSTI), December 1989. http://dx.doi.org/10.2172/7022625.

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Evans, N. D., P. H. Imamura, M. L. Mecartney, and J. Bentley. Grain boundary studies of doped yttria-stabilized zirconia. Office of Scientific and Technical Information (OSTI), March 1998. http://dx.doi.org/10.2172/654194.

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Boldt, Christopher. Directional solidification of the alumina-zirconia ceramic eutectic system. Office of Scientific and Technical Information (OSTI), July 1994. http://dx.doi.org/10.2172/10190639.

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Swab, Jeffrey J. Role of Oxide Additives in Stabilizing Zirconia for Coating Applications. Fort Belvoir, VA: Defense Technical Information Center, September 2001. http://dx.doi.org/10.21236/ada396870.

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Gonzalez, J. M. Development of a zirconia-mullite based ceramic for recuperator applications. Office of Scientific and Technical Information (OSTI), December 1992. http://dx.doi.org/10.2172/6403322.

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