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。
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.
参考文献
[1] | Anders R P, Averback R S, et al. J. Mater. Res, 1989, 4 (3): 704. |
[2] | 杨仕清,王豪才,张万里(YANG Shi-Qing,et al).应用科学学报(J.of Applied Sci,),1997,15(4):436. |
[3] | 林金谷,王钥菊,邹炳锁(LIN Jin-Gu, et al).化学物理学报(Journal of Chemical-Physics). 1996, 9(3): 262. |
[4] | 刘成林,李远光,钟菊花(LIU Cheng-Lin, et al).化学物理学报(Journal of Chemical-Physics).1998,(2): 156. |
[5] | 程彬,陈祖耀,朱玉瑞(CHEN Bin, et al).机械科学与技术(Mechanical Science and Technology).1998, 17: 116. |
[6] | 沈兴海,高宏成(SHENG Xing-Hai, et al).化学通报(Huaxue Tongbao). 1995, 11: 6. |
[7] | Arturo Lopez-Quintela M, Rivas J. Colloid Interface Sci, 1993, 158: 446. |
[8] | 成国祥,沈锋,张仁伯(CHENG Guo-Xiang, et al).化学通报(Huaxue Tongbao). 1997, 3: 14. |
[9] | 张岩,邹炳锁,肖良质(ZHANG Yan, et al).吉林大学自然科学学报(Jilin Daxue Zhiran Kexue Xuebao). 1990, 4, 115. |
[10] | Lufimpadio N, Nagy J B, Detouane E G. Surfactants Solution. 1984, 3: 1483. |
[11] | 张朝平,邓伟,胡宗超(ZHANG Chao-Ping, et al).应用科学学报(J. of Applied Sci,). 1999, 17(4): 493-497. |
[12] | 王毅民.实用X射线谱线图表.北京:原子能出版社.1989. |
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