软磁铁氧体联合包覆对FeSiAl磁粉心性能的影响

Effect of NiZn and MnZn soft ferrites coating on the properties of FeSiAl powder cores

陈劼宁 ¹管弦 ¹邬传健 ¹张美蓉 ²朱圆圆 ²胡庚 ²李启帆 ¹孙科 ¹兰中文 ¹余忠¹

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作者信息

1. 电子科技大学材料与能源学院,四川成都 610054
2. 深圳市麦捷微电子科技股份有限公司,广东深圳 518100
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摘要

采用固相反应法制备NiZn和MnZn铁氧体,球磨后对FeSiAl磁粉进行联合包覆,经过压制成型、退火处理制备FeSiAl复合磁粉心.研究了联合包覆对粉心密度、磁导率和功率损耗的影响;同时对磁粉心磁谱进行测试和拟合,分析两种磁化机制对FeSiAl磁粉心磁导率的贡献.结果表明,采用两种铁氧体联合包覆方案,可以不明显降低复合磁粉心的磁导率,同时降低功率损耗.采用NiZn、MnZn铁氧体均0.5 wt%的联合包覆方案,制备的FeSiAl复合磁粉心密度为6.40 g/cm3,磁导率为74.4,在50 kHz、100 mT的测试条件下功率损耗为156.2 mW/cm3.NiZn的高电阻率特性能够降低复合磁粉心的涡流损耗;MnZn通过影响畴壁位移和磁畴转动稳定复合磁粉心的磁导率.

Abstract

NiZn and MnZn ferrites were prepared via conventional ceramic method.Then by coating NiZn and MnZn ferrite the FeSiAl magnetic powder cores were prepared by pressing and subsequently annealing treatment.The effect of coating of NiZn and MnZn ferrite on density,permeability and power loss of FeSiAl powder core were studied.The samples'magnetic spectrum was tested and fitted,to study two magnetization mechanisms.The results show that the multiple ferrite joint coating can not significantly reduce the permeability of the composite magnetic core,and reduce the power loss.By coating 0.5 wt%of NiZn and MnZn ferrite,FeSiAl magnetic powder core was prepared featuring density of 6.40 g/cm3,permeability of 74.4 and power loss of 156.2 mW/cm3 at 50 kHz and 100 mT.The high resistivity of NiZn ferrite can reduce the eddy current loss of the magnetic powder cores.MnZn ferrite keeps the permeability of magnetic powder cores by affecting domain wall displacement and domain rotation.

关键词

FeSiAl磁粉心/铁氧体/包覆/磁导率/功率损耗

Key words

FeSiAl magnetic powder cores/ferrite/jointcoating/permeability/power loss

引用本文复制引用

出版年

2024

磁性材料及器件

中国西南应用磁学研究所

磁性材料及器件

影响因子：0.358

ISSN：1001-3830

参考文献量19

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