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无机材料学报

无机材料学报

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微乳液法制备超细Ni-Fe复合物微粒

张朝平1; 邓伟1; 胡林1; 罗玉萍1; 胡宗超1; 高翔1; 申德君2   

  1. 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
  • 收稿日期:2000-04-24 修回日期:2000-06-26 出版日期:2001-05-20 网络出版日期:2001-05-20

Preparation of Ultrafine Ni-Fe Composite Particles by Microemulsion

ZHANG Chao-Ping1; DENG Wei1; HU Lin1; LUO Yu-Ping1; HU Zong-Chao1; GAO Xiang1; SHEN De-Jun2   

  1. 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
  • Received:2000-04-24 Revised:2000-06-26 Published:2001-05-20 Online:2001-05-20

PDF (PC)

897

被引次数

69

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．

关键词: 微乳液, 铁-镍复合物, 超细微粒, X射线, 透射电镜

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=2.25～3.00Am2/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.

Key words: microemulsion, Ni-Fe composite particles, ultrafine particle, XRD, TEM

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