摘要
用蒸发冷凝法，制备成不同平均粒径的Ｆｅ４７ｗｔ％Ｎｉ纳米晶粉。将其压成小圆环，测其室温磁谱。结果表明，Ｆｅ４７ｗｔ％Ｎｉ纳米晶粉芯具有较好的高频特性。在（１～３００）ＭＨｚ频率范围内，其复数磁导率实部μ１＞１００，虚部μ２＜２０，损耗角正切ｔｇδ＜０．１，共振频率ｆｒ＞３００ＭＨｚ。当１ＭＨｚ＞ｆ＞４００ＭＨｚ时，μ２及ｔｇδ激剧上升。在（１～３００）ＭＨｚ范围，形成一个很宽的通频带。它有可能成为一个高频、低损耗和宽频带的磁芯材料。
Fe47wt%Ni nanocrystal dust with various average particle sizes were prepared by the evaporationcondensation method in N2 atmosphere. The dust were compressed into the shape of small rings,and then their magneticspectra were measured at room temperature. Experiment showed, within (1～300)MHz, the real part μ1 of the complex permeability was greater than 100, and the imaginary part μ2 was less than 20. The tangent of loss angle tgδ was less than 0.1 and the resonance frequency fx was greater than 300MHz. When 1MHz>f>400MHz,the μ2 and tgδ increased fiercely. Within (1～300)MHz,a wide pass band was formed. It was possible that FeNi nanocrystal dust core made a kind of magnetic core material with high frequency, low loss and wide band.
出处
《功能材料》
EI
CAS
CSCD
北大核心
1997年第6期656-657,共2页
Journal of Functional Materials
关键词
纳米晶
粉芯
磁谱
压力效应
nanocrystal, dust core, magneticspectrum,pressure effect
