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| Study of Oxidation Synthesis and Magnetic Property of Ultrafine Fe3O4 |
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Received:February 27, 2014
Revised:February 28, 2014
Accepted:March 03, 2014
Published Online:July 21, 2014
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| DOI：doi：10.3969/j.issn.1007-7545.2014.08.016 |
| KeyWord:ultrafine powder; Fe3O4; oxidation synthesis; magnetic property |
| Author | Institution |
| Liu QuanMin |
北京矿冶研究总院 |
| Jiang XunXiong |
北京矿冶研究总院 |
| Jia ChengKe |
北京矿冶研究总院 |
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| Abstract: |
| Ultrafine Fe3O4 powder was synthesized by oxidation-precipitation technology with ferrous sulfate as raw material, sodium hydroxide as precipitating agent and air as oxidant. The effects of alkali ratio, synthesis temperature and oxidation rate on magnetic property of synthetic product were investigated. The results show that synthesized Fe3O4 powder has property of high coercive force and saturation magnetization under the optimum conditions including alkali ratio of 2.1~2.2, temperature of 80~90 ℃ and oxidation duration of 2~3 h. The morphology of magnetic powder has close relationship with magnetic property. |
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