等量La-Co掺杂对干压各向异性SrFe_(12)O_(19)结构和磁性能的影响  

Effect of La-Co Substitution on the Microstructure and Magnetic Properties of Dry-pressed Anisotropic Strontium Ferrite

作　　者：林海恋[1] 温东强 王忆[1] 李金道 吕兆民 

机构地区：[1]五邑大学应用物理与材料学院,江门529020 [2]广东江粉磁材股份有限公司,江门529020

出　　处：《材料导报（纳米与新材料专辑）》2014年第1期208-209,219,共3页

基　　金：江门市科技计划项目(江财工[2011]131)

摘　　要：以Y30H-2预烧料作为基料，采用陶瓷法制备La-Co掺杂的干压各向异性Sr1-xLaxFe12-xCoxO19（x=0～0．10）锶铁氧体，研究La3＋Cd2＋共同替代对锶铁氧体结构和磁性能的影响。XRD射线衍射分析表明，La-Co掺杂并没有改变锶铁氧体结构，锶铁氧体主体仍为六角晶结构；SEM分析表明，La-Co掺杂能使晶粒粒度变细；磁性能测量显示，样品的Hi随掺杂量的增加先增大后减小，当取代量x=0．06时，Hcj达到最大值。Br则随掺杂量的增加呈现不规则的变化。K值的变化表明，当x=0．04时，锶铁氧体的综合性能最佳。Based on Y30H-2 pre-sintered powders, La-Co substituted dry-pressed anisotropic strontium ferrites Sr1-xLaxFe12-xCoxO19（x=0～0.10） were prepared by common ceramic processing, and the influence of co-doped La3＋, Co2＋ ions on the crystal structure and magnetic properties of dry-pressed anisotropic strontium ferrites were studied. X-ray diffraction analysis showed that strontium ferrite remains hexagonal strontium ferrite structure and SEM showed that grain size of strontium ferrite can be fine with increasing of La-Co substitutions. Measurement of magnetic properties indicated that coercive force Hcj increases first and then decreases with increasing x, and the maximun value was obtained when the substitution amount x is 0. 06. And Br appears irregular change with increasing x. IP value indicates that strontium ferrite has the best comprehensive magnetic properties with x= 0.04.

关 键 词：锶铁氧体 La-Co掺杂 微观结构 磁性能 

分 类 号：TM27[一般工业技术—材料科学与工程]