| 학회 |
한국재료학회 |
| 학술대회 |
2005년 봄 (05/26 ~ 05/27, 무주리조트) |
| 권호 |
11권 1호 |
| 발표분야 |
전자재료 |
| 제목 |
Acetylacetonate와 결합된 Ti 전구체로부터 BaTiO3 제조 및 유기 용매 분산 특성 |
| 초록 |
Preparation of BaTiO3 has received much current interest because of its very high dielectric constant value. In this present study we described the preparation of BaTiO3 nano-crystals in solution phase from acetylacetonate derived sols. Titanium tris-acetylacetonate [Ti(acac)3]+ was slowly added into the aqueous solution Ba(OH)2 and then it was stirred at 50-110oC for several hours. X-Ray diffraction studies of the air-dried samples showed that crystalline BaTiO3 was formed in solution in presence of relatively high Ba(OH)2 concentration. Microstructures of the samples studied by transmission electron microscopy (TEM) further supported the existence of BaTiO3 in the polycrystalline form. The formation of crystalline BaTiO3 was studied in terms of reaction temperature and the Ba/Ti molar ratio and a plausible mechanism was also proposed. Crystal sizes of the BaTiO3, calculated from the XRD results were in the range 33-50 nm, while the average particle sizes, measured by dynamic light scattering method were found to be in the range 70-100 nm. The dispersion of the BaTiO3 was studied in N-metyl-2-pyrillidone at room temperature and it was observed that the dispersibility of BaTiO3 crystals enhanced by the presence of acetylacetone. |
| 저자 |
Nimai Chand Pramanik, Sang Il Seok, Bok Yeop Ahn, Hoon Kim
|
| 소속 |
Korea Research Institute of Chemical Technology |
| 키워드 |
BaTiO3; dielectrics; dispersion
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| E-Mail |
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