ZrO_2和SnO_2复合掺杂对贫铁配方的MnZn铁氧体磁性能和电性能的影响

Effect of ZrO_2 and SnO_2 Co-doping on Magnetic and Electrical Properties of MnZn Ferrite with Fe-poor Composition

通过ZrO2与SnO2复合掺杂制备了低损耗的MnZn铁氧体材料。研究了在贫铁配方的基础上添加SnO2-ZrO2对MnZn铁氧体微观结构、电性能以及磁性能的影响。结果表明,适量的SnO2-ZrO2复合掺杂有利于促进晶粒均匀致密,明显提高了材料的电阻率,降低比损耗因子,在ζ(SnO2:ZrO2)为3:1时材料的电阻率达到最大值29.5Ωm,比损耗因子达到最小值4.8×10-6。复合掺杂还能提高材料的居里温度、饱和磁感应强度和起始磁导率,当ζ(SnO2:ZrO2)为3:1时磁性能都达到最佳。

ZrO2 and SnO2 co-doped low power loss MnZn ferrites were prepared by the standard ceramic method. Effects of SnO2 and ZrO2 doping on the microstructure, magnetic and electrical properties of MnZn ferrites with Fe-poor composition were investigated. It is found that a proper amount of co-doping can improve uniformity of crystalline grains. Co-doping can increase the Curie temperature, saturation magnetic induction and initial permeability, which reach their maximums when ζ （ SnO2： ZrO2 ） equals 3： 1. Co-doping can also increase the resistivity and decrease the relative loss factor. When ζ（SnO2：ZrO2 ） equals 3： 1, a maximum resistivity of 29.5 Ωm and a minimum relative loss factor of 4.8 × 10^-6 can be obtained.