| 학회 | 한국화학공학회 |
| 학술대회 | 2009년 봄 (04/23 ~ 04/24, 광주 김대중컨벤션센터) |
| 권호 | 15권 1호, p.827 |
| 발표분야 | 재료 |
| 제목 | Synthesis of barium titanate (BaTiO3) nanoparticles by hydrothemal method using supercritical water |
| 초록 | Barium titanate is the useful materia in electrical industries for its outstanding dielectric permittivity and ferroelectric properties. Thus, barium titante has been widely used in various applications such as electro-optic device, D-ram, thermister, multi-layer ceramic capacitor(MLCCs). Especially, in MLCCs industries, barium titanate nanoparticles with the narrow size distribution can achieve reduceing dielectric layer thickness of MLCCs and producing MLCCs with high capacitance in a small volume. In this study, barium titanate nanoparticles were synthesized by a hydrothermal method using supercritical water. Ba(OH)2 and TiO2(anatase)were used as starting materials, and the reaction was carried out at 400oC and 300 bar. To increase conversion of anatase, the reaction time and the initial molar ratio of Ba/Ti was varied. Adding KOH enhanced purity of the product. When amorphous titanium dioxide was used as Ti resource, all of titanium dioxide was converted to barium titanate without addition of OH- source, and the nanoparticles (~50nm) could be obtained without a stabilizer. |
| 저자 | 안기호1, 송봉근1, 이영호1, 이윤우1, 김재훈2 |
| 소속 | 1서울대, 2한국과학기술(연) |
| 키워드 | barium titanate; supercritical |
| 원문파일 | 초록 보기 |
