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Effect of pH and Concentration on the Synthesis of Monodispersed Spherical Fine Zirconia Powders Using Gas–Liquid Phase Reaction

Published online by Cambridge University Press:  10 February 2011

Chang–Hyun Kim
Affiliation:
Faculty of Engineering, Kaya University, Kyungpook 717-800, Korea
Chang–Seop Ri
Affiliation:
Department of Chemistry, Keimyung University, Taegu 704-701, Korea
Dae–Hee Lee
Affiliation:
Departnent of Inorganic Materials Engineering, Kyungpook National University, Taegu 702-701, Korea
Ho–Sung Choo
Affiliation:
Departnent of Inorganic Materials Engineering, Kyungpook National University, Taegu 702-701, Korea
Byung–Kyo Lee
Affiliation:
Departnent of Inorganic Materials Engineering, Kyungpook National University, Taegu 702-701, Korea
Jong–Jae Chung
Affiliation:
Department of Chemistry, Kyungpook National University, Taegu 702-701, Korea
Song–Dae Kim
Affiliation:
Department of Chemistry, Kyungpook National University, Taegu 702-701, Korea
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Abstract

Ammonia gas was blown into the solution of zirconium ion to induce homogeneous precipitation of supersaturated zirconium ion at gas-liquid interface with increase in pH. The precipitates formed using interface of gas-liquid phase were decomposed into fine spherical zirconia powder of high purity. As Concentration increase, mean diameter of particles increases to 140, 180, 240, 290 and 630nm. At pH of 4.5, maximum yield of 98.7% was obtained. From the above pH of 4.5, yield has been kept constant. Above pH of 5.0, large aggregates of precipitate consisting of primary particles were formed, and this may have been caused due to the existence of isoelectric point. Below pH of 4.5, almost aggregate-free fine spherical powders with particle size of below 100nm were produced.

Type
Research Article
Copyright
Copyright © Materials Research Society 1998

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References

1. Goldman, Alex, Modern Ferrite Technologyv, 1990, pp.2144.Google Scholar
2. Bratton, R. J., Am. Ceram. Soc. Bull., 48, p. 759, (1969).Google Scholar
3. Jung, Jongiae; Kim, Changhyun. Lee, Byungkyo, J. Kor. Chem. Soc., 40, p. 173, (1996).Google Scholar

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Effect of pH and Concentration on the Synthesis of Monodispersed Spherical Fine Zirconia Powders Using Gas–Liquid Phase Reaction
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