NiCuZn铁氧体的偏置特性及温度稳定性研究  

Study on DC Bias Superposition Characteristic and Temperature Stability of the NiCuZn Ferrite

作　　者：刘卫沪[1] 颜铄清[1] 董丽[1] 李启凡[1] 陈中艳[1] 聂彦[1] 王鲜[1] 冯则坤[1] 

机构地区：[1]华中科技大学光学与电子信息学院,湖北武汉430074

出　　处：《压电与声光》2015年第1期54-58,63,共6页Piezoelectrics & Acoustooptics

摘　　要：采用传统陶瓷制备工艺制备了NiCuZn铁氧体材料。研究了V2O5、MoO3掺杂对NiCuZn铁氧体材料的微观形貌、直流叠加性能、温度稳定性的影响。研究表明,适量添加V2O5、MoO3可增加铁氧体材料晶界非磁性相的厚度,提高退磁场Hd;从而降低铁氧体材料的磁导率在直流叠加磁场作用下的下降速度。适量添加V2O5、MoO3可调整材料的晶粒尺寸及气孔、晶界等非磁性相的含量;进而改变饱和磁化强度、磁各向异性场、退磁场对材料磁导率的影响权重,最终达到调整材料温度系数的目的。The NiCuZn ferrite was prepared by the conventional ceramics preparation technique.The effects of the V2O5、MoO3doping on the microstructure,DC bias superposition characteristic and temperature stability of the NiCuZn ferrite were investigated.The results indicated that adding suitable amount of V2O5,MoO3 can enhance the thickness of the grain boundary of the ferrite which was nonmagnetic phase,and can also increase the demagnetizing field.As a result,the descent pace of the permeability of the ferrite under the action of DC bias magnetic field was reduced.Adding suitable amount of V2O5、MoO3can change the grain size and the content of the nonmagnetic phase of the material which was pore or grain boundary.So the effect weight of the saturation magnetization,anisotropy field and demagnetizing field on the permeability of the material was changed.In the end,the temperature coefficient of the material can be adjusted.

关 键 词：NICUZN铁氧体 偏置特性 温度稳定性 退磁场 晶界 非磁性相 

分 类 号：TN384[电子电信—物理电子学] TM277[一般工业技术—材料科学与工程]