| Title |
Preparation of Fe3O4 Powders by Microemulsion Method |
| Authors |
신광식(K . S . Shin); 조수행(S . H . Cho); 강용(Y . Kang); 원창환(C . H . Won); 천병선(B . S . Chun) |
| Abstract |
Ultrafine particles of Fe₃O₄ were prepared by means of AOT/water/cyclohexane microemulsion system. Reactants added to the microemulsion system were FeCl₃ FeCl₂ and NH₄OH solutions whose amounts of addition were controlled properly in terms of burets. From the results of this study, the available condition for the preparation of Fe₃O₄ could be described as follows : In the preparing the microemulsion system, the volume ratio of cyclohexane to water was 3.0 and the mole ratio of water to AOT was 7.0, respectively. The concentration of FeCl₃ and FeCl₂ solutions was 1.4M and that of NH₄OH was 15M. The temperature of the microemulsion system was maintained at 30℃, which was stirred continuously with the rate of 1000∼1200rpm. The available amounts of the reactants added to the microemulsion system were obtained and the combinations of the reactants suitable for the preparation of Fe₃O₄, were determined at the triangular graph within experimental conditions of this study. |