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稀土元素La掺杂对Fe-Ni合金电磁性能及吸波性能的影响

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Indexed by:期刊论文

Date of Publication:2018-09-11

Journal:磁性材料及器件

Volume:49

Issue:5

Page Number:9-15

ISSN No.:1001-3830

Key Words:Fe-Ni-合金;素La掺杂;电磁性能;吸波性能

Abstract:以机械合金化方法制备了Fe-Ni和Fe-Ni-La软磁合金吸波材料,分析了球磨时间及稀土元素La掺杂对合金电磁性能及电磁波吸收性能的影响.结果表明,球磨90 h后,形成了具有片状形貌的Fe-Ni和Fe-Ni-La合金,合金电磁参数明显改善,吸波性能明显提高.添加稀土元素La后,合金电磁参数得到优化,复介电常数和复磁导率明显提高,介电损耗和磁损耗得到加强,吸收峰向低频移动.球磨90 h的Fe-Ni合金对电磁波最小反射率为-22 dB,匹配频率10 GHz,频宽2.6 GHz(8.7~11.3 GHz),掺杂稀土元素La后,Fe-Ni-La合金最小反射率为-16.1 dB,匹配频率7.4 GHz,频宽2.5 GHz(6.2~8.7 GHz).

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