| 微乳液法制备超细Ni-Fe复合物微粒 |
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| 引用本文： | 张朝平,邓伟,胡林,罗玉萍,胡宗超,高翔,申德君.微乳液法制备超细Ni-Fe复合物微粒[J].无机材料学报,2001,16(3):481-485. |
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| 作者姓名： | 张朝平 邓伟 胡林 罗玉萍 胡宗超 高翔 申德君 |
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| 作者单位： | 1. 贵州大学理工学院化学系、物理系, 贵阳 550025; 2. 贵阳高等师范专科学校生化系, 贵阳 550008 |
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| 基金项目： | 国家自然科学基金(19872021)；贵州省科学基金[99(3020)]资助课题 |
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| 摘 要： | 应用Ｗ／Ｏ型微乳液法制备了纳米量级超细铁－镍复合物微粒．Ｘ射线和透射、扫描电镜测试表明：它属于表面活性剂包裹型超细微粒．粒径＜３０ｎｍ，密度２．８９ｇ／ｃｍ３的Ｎｉ－Ｆｅ微粒，比饱和磁化强度σｓ＝１３～１６Ａｍ２／ｋｇ，娇顽力 Ｈｃ＝８７～１２３ Ｏｅ，剩磁 Ｂｒ＝２．２５～３．００Ａｍ２／ｋｇ，矫顽力较大，剩磁也较大，说明该超细复合微粒具有硬磁体的性质．Ｘ射线能谱分析表明，有部分Ｎｉ－Ｆｅ合金相形成．
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| 关 键 词： | 微乳液 铁-镍复合物 超细微粒 X射线 透射电镜 |
| 文章编号： | 1000-324X(2001)03-0481-05 |
| 收稿时间： | 2000-4-24 |
| 修稿时间： | 2000年4月24日 |
Preparation of Ultrafine Ni-Fe Composite Particles by Microemulsion |
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| ZHANG Chao-ping,DENG Wei,HU Lin,LUO Yu-ping,HU Zong-chao,GAO Xiang,SHEN De-Jun.Preparation of Ultrafine Ni-Fe Composite Particles by Microemulsion[J].Journal of Inorganic Materials,2001,16(3):481-485. |
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| Authors: | ZHANG Chao-ping DENG Wei HU Lin LUO Yu-ping HU Zong-chao GAO Xiang SHEN De-Jun |
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| Affiliation: | 1. Department of Chemistry; Physics in College of Science and Technology; University of Guizhou; Guiyang 550025; China; 2. Department of Biochemistry; Guiyang Higher Normal Training School, Guiyang 550008, China |
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| Abstract: | Nanoparticles of Ni-Fe composite were prepared with the W/O microemulsion method. The investigations by XRD, IR and TEM show the ultrafine particles are coated by surfactants. Their average sizes are less than 30nm and their densities about 2.89g/cm3, the specific saturation magnetization σs＝13～16Am2/kg, the coercivity Hc＝87～123Oe and the residual magnetism Br＝2.25～3.00Ama/kg. The coercivity and residual magnetism are much higher, it is shown that the complex supermicropowders have hard magnetic properties. The analysis by X-ray energy spectroscopy shows that part of Ni-Fe has formed alloy phases. Magneticrheological (MR) effect of the MR fluid prepared from the ultrafine particles is superior and the subsidence stability of the MRF is excellent. |
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| Keywords: | microemulsion Ni-Fe composite particles ultrafine particle XRD TEM |
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