电磁干扰屏蔽铁氧体的研制:一个案例研究

Proceedings of the International Conference on Electromagnetic Interference and Compatibility Pub Date : 1900-01-01 DOI:10.1109/ICEMIC.1999.871666

R. G. Chandran, R.M. Cursetji

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引用次数: 0

摘要

采用传统陶瓷工艺合成了Ni/sub 0.30/Zn/sub 0.60/M/sub 0.10/Fe/sub 2/O/sub 4/ M=Cu的Ni-Zn电磁干扰屏蔽尖晶石铁氧体，并对其性能进行了调整，使其适用于工作频率为30-200 MHz的数字设备带状扁平电缆。这些高密度软铁氧体是通过加入Cu等烧结助剂获得的。铁素体的显微组织表现为尺寸为/spl sim/20 /spl mu/m的角状晶粒和粒间/粒内孔隙度。尖晶石铁氧体具有损耗性质，居里温度为170℃，在30、100和200 MHz频段的阻抗分别为23.3、59.6和121.5欧姆。

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Development of an EMI shielding ferrite: a case study

Ni-Zn EMI shielding spinel ferrite of the composition Ni/sub 0.30/Zn/sub 0.60/M/sub 0.10/Fe/sub 2/O/sub 4/, where M=Cu, have been synthesized by the conventional ceramic route and the properties were tailored for its use in ribbon flat cables of digital equipments in the operating frequency range of 30-200 MHz. These highly dense soft ferrites were obtained by the incorporation of sintering aids such as Cu. The microstructure of the ferrite showed angular grains of size /spl sim/20 /spl mu/m and inter/intragranular porosity. The spinel ferrite was lossy in nature and had a Curie temperature of /spl sim/170/spl deg/C and possessed impedance of 23.3, 59.6 and 121.5 Ohms at 30, 100 and 200 MHz respectively.

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Proceedings of the International Conference on Electromagnetic Interference and Compatibility

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