采用硝酸盐柠檬酸溶胶凝胶法结合氢还原法制备FeCoNi合金超细粉体.用扫描电镜观察粉体的形貌,用激光粒度分析仪测试粉体的粒度,结果显示:合金粉体呈现片状和针状,粒度分布很宽.将制备的合金粉与石蜡按质量比80:20混合制成样品,在0.5～8 GHz内,采用矢量网络分析仪测试样品的电磁参数.研究结果显示:合金粉体μ'≥2的频率至少高于3 GHz,有的达到6 GHz;样品的磁导率虚部曲线呈现多模共振的形式.材料反射率计算显示,合金粉的5 dB吸波频宽可达5.91 GHz(2.09～8 GHz).
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