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J. Korean Ceram. Soc. > Volume 42(2); 2005 > Article
Journal of the Korean Ceramic Society 2005;42(2): 123.
doi: https://doi.org/10.4191/kcers.2005.42.2.123
용매열법에 의한 정방정 티탄산 바륨 분말의 합성
권순규, 최균, 피재환1, 최의석1
요업기술원 첨단소재부품팀
1요업기술원 이천분원사업단
Synthesis of Tetragonal Barium Titanate Powder by Solvothermal Technique
Soon-Gyu Kwon, Kyoon Choi, Jae-Hwan Pee1, Eui-Seok Choi1
Advanced Materials and Components Lab., Korea Institute of Ceramic Engineering and Technology
1Icheon Institute, Korea Institute of Ceramic Engineering and Technology
Barium Titanate (BT) powders were synthesized by solvothermal method with an ethanol as a solvent. The average particle size was increased with the feedstock concentration: the size was 59 nm at $6.25{times}10^{-2}$ M and 89 nm at 0.5 M. The sample obtained at 0.5 M concentration was analysed by Rietveld refinement and the mole fraction of tetragonal phase was $75.5%$ and lattice parameter of tetragonal phase was a=0.3999 (nm), c=0.4032 (nm), and cubic phase was a=0.4015 (nm). TEM analysis for the samples with condition of annealing at $500^{circ}C$ for I h showed that hydroxyl ions on oxygen sites were not found for these experimental conditions.
Key words: Solvothermal synthesis, Barium titanate, Tetragonality, Rietveld refinement
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