| 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 |
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| ABSTRACT |
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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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