Sn4＋取代对 NiZn 功率铁氧体磁性能的影响

摘要

采用固相反应法制备化学计量为Ni0．65 Zn0．35 Snx Fe2－ x O4（x＝0．00～0．08）的铁氧体软磁材料。采用XRD、SEM、LCR测试仪、B‐H分析仪对其结构、电磁性能进行研究。结果表明：随Sn4＋取代量 x的增加，晶格常数 a逐渐增大，晶粒尺寸变化不大，饱和磁通密度 Bs 逐渐下降，铁氧体的起始磁导率μi 先上升后下降，功率损耗 Pcv与μi 的变化呈相反趋势。当S n4＋的取代量 x＝0．04时具有最低的功率损耗，且 Pcv随着温度的升高而逐渐降低。%The stoichiometric Ni0.65Zn0.35SnxFe2 - xO4(x=0 .00‐0 .08) power ferrites soft magnetic ma‐terial was prepared by the solid‐state reaction method .The structural characteristics and electromag‐netic properties were investigated by X‐ray diffraction(XRD) ,SEM ,LCR tester ,B‐H analyzer ,respec‐tively .The results indicate that with increasing Sn4+ substitution amount ,lattice constant a increases gradually ,grain size varies not much ,saturation magnetic flux density Bs continuously decreases ,ini‐tial permeability μi of the ferrites increases initially and then decreases ,and pow er loss Pcv has an op‐posite change with μi .The power loss Pcv has a minimum value when the Sn4+ substitution amount is 0 .04 and Pcv decreases gradually w hen the temperature increases .