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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 19    Special 1    September 2009

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Synthesis and characterization of Ba(CoxNb1−x)O3 nanoparticles byhydrothermal processing
Hyun-Ju KIM1, Min-Cheol CHU2, Seong-Jai CHO2, Dong-Sik BAE1

1. School of Nano & Advanced Materials Engineering, Changwon National University,
Gyeongnam 641-773, Korea;
2. Materials Evaluation Center, Korea Research Institute of Standards and Science,
Yuseong, Daejeon 305-600, Korea

Abstract:The nanosized Ba(CoxNb1−x)O3(BCN) particles were prepared under high temperature and pressure conditions by precipitation from metal nitrates with aqueous potassium hydroxide. Ba(CoxNb1−x)O3 powders were obtained in the temperature range of 170−210 ℃ for 6 h. The results show that the average size of the synthesized particles increases with increasing reaction temperature. The average size of the synthesized particles is about 10 nm. The crystalline phase of the synthesized particles is found to be Ba(CoxNb1−x)O3. Ceramics derived from the nano BCN powders could achieve high sintering density at a relatively low sintering temperature.

 

Key words: Ba(CoxNb1−x)O3 powders; nanoparticles; hydrothermal processing

ISSN 1672-7029
CN 43-1423/U

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