CoZn-X型钡铁氧体的结构与高频磁性  

Structures and high-frequency magnetic properties of CoZn-X type barium hexaferrites

作　　者：王常生[1] 李龙土[1] 齐西伟[1] 周济[1] 

机构地区：[1]清华大学材料科学与工程系新型陶瓷与精细工艺国家重点实验室,北京100084

出　　处：《功能材料》2003年第3期299-300,303,共3页Journal of Functional Materials

基　　金：国家高技术研究发展计划(863计划)资助项目(2001AA320502)

摘　　要：　结合化学共沉淀方法制备了CoZn X型六角晶系钡铁氧体,对其结构、显微形貌和磁性的测量分析表明:Zn的加入有利于促进CoZn X型钡铁氧体相的形成及晶粒长大,也有利于提高饱和磁化强度;适当的Zn含量可以使CoZn X型钡铁氧体具有高频软磁特性,经1320℃×3h烧结后样品的起始磁导率随Zn含量增加在x=1.0处有极大值15,对应截止频率140MHz。CoZnX type barium hexaferrites were prepared by chemical coprecipitation method and sintering in air. The structures, morphologies and magnetic properties of sintered samples were investigated. It was shown that the saturation magnetization of CoZnX barium hexaferrites can be promoted by adding Zn. Highfrequency soft magnetic properties with high permeability can be obtained with proper Zn content. The initial permeability could reach maximum value 15 with cutoff frequency 140MHz at x=1.0 when it was sintered at 1320℃ for 3h.

关 键 词：CoZn—X型钡铁氧体 结构 高频磁性 化学共沉淀 饱和磁化强度 

分 类 号：TM277[一般工业技术—材料科学与工程]