Temperature Dependence of Initial Permeability and Losses of Sn-substituted MnZn Ferrites
Sn-substituted MnZn ferrites were prepared by conventional oxide ceramic process. The influence of Sn-substitution on the temperature dependence of initial permeability and losses of MnZn ferrites were investigated. The results indicated that at room temperature, the bulk density (dm), initial permeability (μi),saturation magnetic induction (Bs) and electrical resistivity (p) of Sn-substituted MnZn ferrites all increased initially and then decreased with the increase of Sn substitute concentration, while the total losses (Pcv) decreased first and increased subsequently. Meanwhile, the temperature of secondary maximum peak of/μi～T curve and the minimum losses moved to lower temperature while the Sn substitute concentration increased.When the content of Sn substitution was 0.3mo1％, at room temperature, the/μi, Bs, dm and p reached their maxima, while the hysteresis loss (Ph), eddy current loss (Pe) and total losses (Pcv) achieved their minima. The Ph～T and μi～T curves varied contrarily, and due to the contribution of extra eddy current loss (Pe,exc) which was proportional to Ph, the Pe～T curve did not agree with its classical expression. Finally, MnZn ferrite substituted with 0.3mo1％ SnO2 shows the highest μi (3894) and lowest Pcv (303kW/m3) at room temperature.
MnZn ferrites Sn substitution Microstructure initial permeability power losses
Z.Y.Xu Z.Yu K.Sun L.Z.Li H.N.Ji Z.W.Lan
State Key Laboratory of Electronic Thin Films and Integrated Devices,University of Electronic Science and Technology of China,Chengdu 610054,Sichuan,China
国际会议
The 10th International Conference on Ferrites(2008中国国际铁氧体研讨会)
成都
英文
264-268
2008-10-10（万方平台首次上网日期，不代表论文的发表时间）