| 수열합성법에 의한 Li-ferrite 분말 제조 |
| 이종현, 강용1, 원창환, 천병선 |
충남대학교 급속응고신소재연구소
1충남대학교 화학공학과 |
| Preparation of Li-ferrite Powders by Hyrtothermal Method |
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| ABSTRACT |
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Li-ferrite powders were prepared from mixture of Fe and Li salts using a hydrothermal method. Their crystal structure, microstructure and magnetic property were investigated with X-ray diffraction analysis, chemical analysis, SEM, and VSM. In the case of using FeCl3 as a precursor, Li-ferrite powders were synthesized. However, Fe3O4 was formed when the precursor was a divalented Fe2SO4 or FeCl2. The precipitation rate of Li-ferrite was increased as the reaction temperature increased. The optimum conditions of synthesis were the mole ratio of Fe+++/Li+=2, pH 13, the reaction temperature of 25$0^{circ}C$ and the reaction time of 120min. With this condition, the spherical particles with good dispersion were obtained with average particle size of 0.4${mu}{textrm}{m}$ and saturation magnetization of 65 emu/g. |
| Key words:
Li-ferrite, Hydrothermal method |
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