CaO-Bi_2O_3-MoO_3-XNb_2O_5复合掺杂对高磁导率Mn-Zn铁氧体的微观结构和电磁性能的影响  

Effects of Composite Doping of CaO-Bi_2O_3-MoO_3-XNb_2O_5 on Microstructure and Electromagnetic Properties of High Permeability Mn-Zn Ferrites

作　　者：李冬云[1] 王凡[1] 孙玉坤[1] 徐扬[1] 葛洪良[1] 周玄[1] Li Dongyun;Wang Fan;Sun Yukun;Xu Yang;Ge Hongliang;Zhou Xuan(China Jiliang University, Hangzhou 310018, China)

机构地区：[1]中国计量大学,浙江杭州310018

出　　处：《稀有金属材料与工程》2018年第6期1921-1925,共5页Rare Metal Materials and Engineering

基　　金：浙江省自然基金(LY14E020009);浙江省公益科技计划(2015C31041)

摘　　要：采用高温固相反应制备了CaO-Bi_2O_3-MoO_3-XNb_2O_5(X=0.000%~0.075%,质量分数,步长:0.015%)复合掺杂的高磁导率Mn-Zn铁氧体材料,利用XRD、SEM、四探针电阻测试仪、阻抗分析仪、和软磁测试仪等分析测试手段对材料结构和性能进行表征,研究了复合掺杂剂中Nb_2O_5掺杂量对高磁导率Mn-Zn铁氧体材料的结构和电磁性能的影响。结果表明:当Nb_2O_5少量掺杂时,Nb_2O_5可以改善材料的微观结构,提高其密度、频率稳定性和品质因数,提高其电阻率,降低其体积功耗;当Nb_2O_5过量掺杂时,Nb_2O_5将恶化材料的微观结构,导致材料的电磁性能变差。当Nb2O5掺杂量为0.030%时材料的综合电磁性能最佳。The high permeability Mn-Zn ferrites doped with CaO-Bi2O3-MoO3-XNb2O5（X=0.000 wt%~0.075 wt%, step： 0.015%） were prepared by high temperature solid state reactions. The phase composition, microstructure and electromagnetic properties were characterized by XRD, SEM, FPP, impedance analyzer and soft magnetic AC testing system. The effects of Nb2O5 doping amount on the microstructure and electromagnetic properties of Mn-Zn ferrites were investigated. The results show that when a small amount of Nb2O5 is doped, Nb2O5 can refine the microstructure, improve the density, frequency stability and quality factor, electrical resistivity, and reduce the specific loss. When a large amount of Nb2O5 is doped, Nb2O5 will cause deterioration of microstructure and the electromagnetic properties of the Mn-Zn ferrites. When the Nb2O5 doping amount is 0.030 wt%, the best comprehensive performance of the Mn-Zn ferrites is obtained.

关 键 词：NB2O5 MN-ZN铁氧体 微观结构 电磁性能 

分 类 号：TM277.1[一般工业技术—材料科学与工程]