Influence of particle size on the magnetic spectrum of NiCuZn ferrites for electromagnetic shielding applications
Influence of particle size on the magnetic spectrum of NiCuZn ferrites for electromagnetic shielding applications
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DOI：
10.1016/j.jmmm.2015.10.129
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发表时间：
2016-03
影响因子：
2.7
通讯作者：
Xiaohan Wu;Shuoqing Yan;Weihu Liu;Zekun Feng;Yajie Chen;V. Harris
中科院分区：
文献类型：
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作者：
Xiaohan Wu;Shuoqing Yan;Weihu Liu;Zekun Feng;Yajie Chen;V. Harris
系统研究了铁氧体颗粒尺寸对掺杂Co2 O3和Bi 2 O3的NiCuZn多晶铁氧体磁谱（1 MHz ~ 1 GHz）的影响。实验表明，通过研磨时间和相应的烧结温度定制的铁氧体颗粒尺寸对于在13.56 MHz下实现高磁导率、高Q因子和低磁损耗是至关重要的，用于电磁屏蔽应用，特别是近场通信（NFC）领域。很明显，高性能的NiZnCu铁氧体材料是由形态和显微结构强烈定制的。结果表明，细化铁氧体颗粒和较低的烧结温度有利于降低磁损耗和提高磁导率。本工作为改进大面积流延铁氧体薄板用浆料的配方奠定了基础。
The effect of ferrite particle size on the magnetic spectra (1 MHz to 1 GHz) of NiCuZn polycrystalline ferrites doped with Co2O3and Bi2O3were systematically investigated. The experiments indicate that the ferrite particle size tailored by grinding time and corresponding sintering temperatures is crucial to achieving high permeability, high Q-factor and low magnetic loss, at 13.56 MHz for electromagnetic shielding applications especially in the near field communication (NFC) field. It is evident that high-performance NiZnCu ferrite materials are strongly tailored by morphology and microstructure. It is conclusive that fine ferrite particles and relatively low sintering temperatures are favorable to lowering magnetic loss and enhancing permeability. This work has built a foundation for improvement of the ferrite slurry used for fabrication of large area tape-casting ferrite sheets.