The Effect of Nb2O5 Addition on the Microstructure and Magnetic Properties of MnZn Ferrites

摘要：

MnZn ferrites with the chemical formula Mn0.68Zn0.25Fe2.07o4 have been prepared by conventional ceramic techniques. Toroidal cores were sintered at 1350℃ for 4h in N2/O2 atmosphere with 4％ oxygen. Then the influence of Nb2O5 addition on the microstructure and magnetic properties of MnZn ferrites was investigated by characterizing the fracture surface micrograph and measuring the magnetic properties. The results show that, the initial permeability and saturation magnetic flux density increase and power losses decrease when the Nb2O5 concentration is not more than 0.04wt％. The average grain size increases with the increase of Nb2O5 concentration. However, excessive Nb2O5 concentration (>0.04wt％) results in the exaggerated grain growth and porosity increase which result in the initial permeability and saturation magnetic flux density decrease and power losses increase.

关键词： MnZn ferrites Nb2O5 addition microstructure magnetic properties

作者: L.Z.Li Z.W.Lan Z.Yu K.Sun Z.Y.Xu H.N.Ji

作者单位: State Key Laboratory of Electronic Thin Films and Integrated Devices,University of Electronic Science and Technology of China,Chengdu 610054.Sichuan,China

会议类型: 国际会议

会议名称: The 10th International Conference on Ferrites(2008中国国际铁氧体研讨会)

会议地点: 成都

会议语种:英文

页码: 269-272

在线出版日期: 2008-10-10（万方平台首次上网日期，不代表论文的发表时间）