Investigation into the Properties of a New Precursor for Preparation of Tetragonal Zirconia

Glushkova, V. B.; Лапшин, А. Е.; Подзорова, Л. И.; Polikanova, A. S.; Уголков, В. Л.

doi:10.1023/b:gpac.0000007940.94851.48

Cited by 5 publications

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“…It is known [4][5][6] that the conditions used for the preparation of zirconia solid solutions substantially affect their crystal structure and properties of produced ceramic materials. Technologically, the coprecipitation of hydroxides followed by their heat treatment is the most promising method for synthesizing high-purity nanodisperse oxide materials.…”

Section: Introductionmentioning

confidence: 99%

“…Technologically, the coprecipitation of hydroxides followed by their heat treatment is the most promising method for synthesizing high-purity nanodisperse oxide materials. The techniques for overcoming the main disadvantage of this method (a high degree of particle agglomeration) were developed and described in our earlier works [5][6][7][8]. However, the search for new more efficient nanotechnologies, as before, remains an important problem.…”

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confidence: 99%

“…Ceria, which is structurally similar to zirconia, is an efficient stabilizer of the tetragonal zirconia modification. However, ceria at high temperatures and a deficit of oxygen can transform into a trivalent state, which results in a decomposition of solid solutions.The purpose of this work was to prepare tetragonal solid solutions of complex composition based on zirconia doped with HfO 2 , CeO 2 , and TiO 2 oxides from hydroperoxides according to the recommendations described in [9] and our experience in synthesizing ZrCe solid solutions from zirconium and cerium peroxides [6]. Moreover, we investigated sintering of the solid solutions and their electrical properties.…”

mentioning

confidence: 99%

“…The purpose of this work was to prepare tetragonal solid solutions of complex composition based on zirconia doped with HfO 2 , CeO 2 , and TiO 2 oxides from hydroperoxides according to the recommendations described in [9] and our experience in synthesizing ZrCe solid solutions from zirconium and cerium peroxides [6]. Moreover, we investigated sintering of the solid solutions and their electrical properties.…”

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Preparation of nanodisperse solid solutions based on ZrO2 and HfO2 from hydroperoxides

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Original Russian Text © T.I. Panova, V.P. Popov, V.B. Glushkova, A.V. Domanskii, 2007, published in Fizika i Khimiya Stekla. 652 INTRODUCTION Zirconia has attracted considerable attention of materials technologists due to its high melting temperature, chemical inertness, hardness, wear resistance, small friction coefficient, and low thermal conductivity. Moreover, owing to their high oxygen-ion conductivity (especially for the tetragonal phase in the temperature range close to 400 ° C [1]), the materials based on zirconia can be used in various high-temperature electrochemical devices, specifically in sensors of oxygen partial pressure. Materials based on hafnia have been investigated to a lesser extent, because they are too expensive for wide practical applications. The chemical and physical properties of hafnia are similar to those of zirconia. However, compared to zirconia, hafnia has higher temperatures of melting and polymorphic transformations, a smaller thermal expansion coefficient, and a higher chemical durability. Electrolytes based on hafnia are stable to a rapid change in the temperature, have a high chemical stability, and possess a lower electronic conductivity at temperatures above 1200 ° C as compared to materials based on zirconia [2, 3].It is known [4-6] that the conditions used for the preparation of zirconia solid solutions substantially affect their crystal structure and properties of produced ceramic materials. Technologically, the coprecipitation of hydroxides followed by their heat treatment is the most promising method for synthesizing high-purity nanodisperse oxide materials. The techniques for overcoming the main disadvantage of this method (a high degree of particle agglomeration) were developed and described in our earlier works [5][6][7][8]. However, the search for new more efficient nanotechnologies, as before, remains an important problem. Ceria, which is structurally similar to zirconia, is an efficient stabilizer of the tetragonal zirconia modification. However, ceria at high temperatures and a deficit of oxygen can transform into a trivalent state, which results in a decomposition of solid solutions.The purpose of this work was to prepare tetragonal solid solutions of complex composition based on zirconia doped with HfO 2 , CeO 2 , and TiO 2 oxides from hydroperoxides according to the recommendations described in [9] and our experience in synthesizing ZrCe solid solutions from zirconium and cerium peroxides [6]. Moreover, we investigated sintering of the solid solutions and their electrical properties. SAMPLE PREPARATION AND EXPERIMENTAL TECHNIQUEInvestigations were performed using differential thermal analysis (DTA) on a MOM Q1500 D derivatograph, X-ray powder diffraction on a DRON-3 diffractometer, and IR spectroscopy on a Perkin-Elmer 1760 X Fourier-transform IR spectrometer (United States) equipped with a special diffuse reflection attachment at a resolution of 8 cm -1 .The specific surface area of powders was measured using the low-temperature nitrogen adsorption method ...

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Preparation of nanodisperse solid solutions based on ZrO2 and HfO2 from hydroperoxides

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“…It is well known [1][2][3] that the conditions used for the preparation of zirconia and zirconia-based solid solutions affect their crystalline structure and the properties of the prepared ceramics. At present, the sol-gel technology, including the methods for coprecipitating amorphous products from solutions of reagents, is most promising for the preparation of such ceramics.…”

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Investigation into the phase formation in the ZrO2-CeO2 system

2005

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Nanopowders of solid solutions with different compositions are prepared in the zirconia-enriched region of the ZrO 2 -CeO 2 system. The crystallization of these powders and the formation of the monoclinic, cubic, and tetragonal solid solutions of the composition (Zr 1 -x Ce x )O 2 are investigated. It is found that the unit cell parameters of the solid solutions increase as the cerium content increases. This confirms the fact that cerium ions [ r (Ce 4+ ) = 1.11 Å] substitute for zirconium ions [ r (Zr 4+ ) = 0.98 Å] in these solid solutions. The average size of crystallites of the solid solutions under investigation increases from 5 to 60 nm in the temperature range 500-1200 ° C.

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Synthesis Method Influence on the Physicochemical Properties and Phase Composition of Zirconium Dioxide

Maiorov

Yakovlev²

2022

Glass Ceram

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Investigation into the Properties of a New Precursor for Preparation of Tetragonal Zirconia

Cited by 5 publications

References 2 publications

Preparation of nanodisperse solid solutions based on ZrO2 and HfO2 from hydroperoxides

Preparation of nanodisperse solid solutions based on ZrO2 and HfO2 from hydroperoxides

Investigation into the phase formation in the ZrO2-CeO2 system

Synthesis Method Influence on the Physicochemical Properties and Phase Composition of Zirconium Dioxide

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