超细金属和二元合金磁粉的制备及静态与动态磁性研究

应用科学学报 ›› 1997, Vol. 15 ›› Issue (4): 436-439.

超细金属和二元合金磁粉的制备及静态与动态磁性研究

杨仕清, 王豪才, 张万里, 何世光

电子科技大学信息材料工程学院

收稿日期:1996-07-14 修回日期:1996-11-03 出版日期:1997-12-31 发布日期:1997-12-31
作者简介:杨仕清:副教授,电子科技大学信息材料工程学院,成都 610054
基金资助:
军事电子预研基金;国防预研项目

PREPARATION, MICROSTRUCTURE, STATIC AND DYNAMIC MAGNETIC PROPERTIES OF ULTRA-FINE METALLIC AND BIMETALLIC ALLOY POWDERS

YANG SHIQING, WANG HAOCAI, ZHANG WANLI, HE SHIGUANG

Institute of Informations and Materials, University of Electronic Science and Technology of China, Chengdu 610054

Received:1996-07-14 Revised:1996-11-03 Online:1997-12-31 Published:1997-12-31

摘要/Abstract

摘要： 利用多元醇方法制备了纳米金属及二元合金磁粉,XRD和TEM分析表明,所制超细金属磁粉粒径为50nm左右,其形状近似为球形,Co粉和Ni粉具有面心立方结构,而Co_xNi_1-x合金粉为固溶体或Co和Ni的fcc相混合物.用振动样品磁强计(VSM)对其进行了静态磁性能测试,当0 ≤ x ≤ 1(mol)时,比饱和磁化强度σ_s从18.8Am²/kg变化到128.8Am²/kg,而矫顽力H_c从14000A/m降至7520A/m,利用HP8510B在8.20~12.40GHz频率范围内对金属颗粒——环氧树脂复合材料的动态微波特性进行了测试,探讨了磁性能随化学组成等的变化关系.

关键词: 动态磁导率, 纳米金属磁粉, 静态与动态磁性, 比饱和磁化强度, 矫顽力, 多元醇方法

Abstract: The polyxol method is used to prepare the fine metallic and bimetallic alloy powders. XRD and TEM analysis show that the fine Co and Ni metallic powders have a fcc structure and Co_xNi_1-x. powder has a solid solution or a mixed fcc phase, and all of these powders have a nearly spherical shape with grain size being about 50nm. The specific saturation magnetisation σ_s increases (from σ_s=18.8 to 128. 8 Am²/kg) and the coercivity H_c decreases (from H_c=14000 to 7520 A/m) as the mole fraction of cobalt x varies from 0 to 1. The HP8510B is used to measure the dynamic permeability of metalepoxy resin composite material within the frequency range of 8. 20~12. 40 GHz. The dependence of static and dynamic magnetic properties upon mole fraction x is also discussed.

Key words: nanometallic magnetism powder, static and dynamic magnetic properties, specific saturation magnetisation, coercivity, dynamic permeadility, polyxol method

杨仕清, 王豪才, 张万里, 何世光. 超细金属和二元合金磁粉的制备及静态与动态磁性研究[J]. 应用科学学报, 1997, 15(4): 436-439.

YANG SHIQING, WANG HAOCAI, ZHANG WANLI, HE SHIGUANG. PREPARATION, MICROSTRUCTURE, STATIC AND DYNAMIC MAGNETIC PROPERTIES OF ULTRA-FINE METALLIC AND BIMETALLIC ALLOY POWDERS[J]. Journal of Applied Sciences, 1997, 15(4): 436-439.