低温烧结BaCoTiFe_(10)O_(19)铁氧体的微结构及高频磁性能  

Microstructure and High Frequency Magnetic Properties of Low-Temperature Sintered BaCoTiFe_(10)O_(19) Ferrites

作　　者：殷水明[1] 贾利军[1] 张怀武[1] 李涛[1] 

机构地区：[1]电子科技大学微电子与固体电子学院,四川成都610054

出　　处：《磁性材料及器件》2009年第6期60-63,共4页Journal of Magnetic Materials and Devices

基　　金：国家自然科学基金资助项目(50872017);国家自然科学基金创新群体项目(60721001);科技部国际合作项目(2006DFA53410;2007DFR10250);国家基础研究(973)资助项目(2007CB31407)

摘　　要：采用传统陶瓷工艺制备了BaCoTiFe10O19铁氧体,结合相结构、显微形貌分析和对材料磁化机理的讨论,主要研究了Bi2O3加入量和烧结温度对钡铁氧体高频磁性的影响。实验表明,起始磁导率和共振频率随Bi2O3加入量的变化存在极值,当Bi2O3的加入量为7.5mol%时钡铁氧体具有较高的磁导率和较低的磁共振频率,偏离7.5mol%均导致磁导率的降低和磁共振频率的升高;高烧结温度导致晶粒尺寸的长大和晶格结构的完善,有利于提高材料的磁导率,同时降低磁共振频率。BaCoTiFe10O19 ferrites were prepared by traditional ceramics method. Effect of additive amount of bismuth oxide and sintering temperature on microstrueture and high-frequency magnetic properties were studied with XRD, SEM and the measurements of complex permeability. It indicated that barium ferrite with additive amount of bismuth oxide 7.5mol% has the lowest magnetic resonant frequency and the highest initial permeability, any deviation from 7.5mol% will results in higher resonant frequency and lower initial permeability. Higher sintering temperature is corresponding to higher initial permeability by enlarging magnetic particles and perfecting the crystallinenature, but resonant frequency decreases.

关 键 词：BaCoTiFe10O19铁氧体 Bi2O3添加 微结构 高频磁性能 二次再结晶 

分 类 号：TM277[一般工业技术—材料科学与工程]