| Budget Amount *help |
¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
Fiscal Year 2014: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2013: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2012: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
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| Outline of Final Research Achievements |
In order to prepare the high performance permanent magnet, we had prepared the following materials as the precursor of nanocomposite magnet by using core-shell structure with Fe phase as soft phase and ε-Fe2O3 phase as hard phase. In order to prepare air-stable metallic Fe nanoparticles, iron-oxide nanoparticles as precursors were reduced in a hydrogen atmosphere and then their surfaces were oxidized under low concentration of oxygen. To obtain Fe2O3 phase, we treated iron oxide nanoparticles with silica shell at several temperature. The size of magnetic nanoparticles affects their magnetism. We had also controlled the particle size and crystal structure. By using SiO2 coated iron oxide nanoparticles as a precursor, we suceeded to obtain mono-phase ε-Fe2O3 nanoparticles.
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