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- 고에너지 볼밀링된 BaCO3와 TiO2 혼합분말의 고상반응에 의한 나노결정 BaTiO3 분말 합성
- 류성수
- Synthesis of Nanocrystalline BaTiO3 Powder by the Combination of High Energy Ball Milling of BaCO3-TiO2 Mixture and Solid-State Reaction
- Sung-Soo Ryu
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Journal of Korean Powder Metallurgy Institute 2012;19(4):310-316
DOI: https://doi.org/10.4150/KPMI.2012.19.4.310
한국세라믹기술원 엔지니어링세라믹센터
Engineering Ceramics Center, Korea Institute of Ceramic Engineering and Technology
Engineering Ceramics Center, Korea Institute of Ceramic Engineering and Technology
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Abstract
Nanocrystalline BaTiO_3 powder could be synthesized by solid-state reaction using the mixture which was prepared by a high energy milling process in a bead mill for BaCO_3 and nanocrystalline TiO_2 powders mixture. Effect of the milling time on the powder characteristic of the synthesized BaTiO_3 powder was investigated. Nanocrystalline BaTiO_3 with a particle size of 50 nm was obtained at 800°C. High tetragonal BaTiO_3 powder with a tetragonality(=c/a) of 1.009 and a specific surface area of 7.6m2/g was acquired after heat-treatment at 950°C for 2 h. High energy ball milling was effective in decreasing the reaction temperature and increasing the tetragonality.
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