新型钙系铁氧体制备与磁性能研究  

Preparation and magnetic properties of new calcium permanent ferrites

作　　者：刘先松[1] 徐娟娟[1] 姜坤良[1] 冯双久[1] 阮征[1] 

机构地区：[1]磁性材料安徽省工程技术研究中心,安徽大学物理与材料科学学院,安徽合肥230039

出　　处：《磁性材料及器件》2013年第2期1-4,共4页Journal of Magnetic Materials and Devices

基　　金：国家自然科学基金资助项目(51072002);安徽省教育厅重点科研项目(KJ2010A008;KJ2012A027);安徽大学"211工程"学术创新团队科研课题

摘　　要：采用陶瓷法制备了La、Co掺杂的M型钙系铁氧体R1-x-yCaxLay.nFe(2n-z)/nCoz/nO3(x,y,z和n分别满足关系:0.01≤x≤0.4,0.1≤y≤0.75,0.07≤z≤0.82,5.0≤n≤6.5,0≤1-x-y≤0.5,R为Ba和Sr时,0≤1-x-y≤0.1)。用X射线衍射(XRD)、扫描电子显微镜(SEM)、振动样品磁强计(VEM)和永磁材料自动测量装置对样品的结构与磁学性能进行了观测和研究。实验结果表明,这种钙系永磁铁氧体拥有比传统锶永磁铁氧体更高的剩磁和内禀矫顽力,应用于新能源领域有利于器件的小型化。La-Co substituted R1-x-yCaxLay·nFe（2n-z）/nCoz/nO3, M-Type calcium ferrites were prepared by ceramic process. The crystal structure and magnetic properties was studied by means of X-ray diffraction（XRD）, scanning electron microscope（SEM）,vibrating sample magnetometer（VSM） and permanent magnet material measuring instrument. Influences of La-Co substitution on the structure and magnetic properties of R1-x-yCaxLay·nFe（en-z）/nCoz/nO3 were systematically investigated. The experimental results show that Ca permanent ferrite has higher remanence and intrinsic coercivity than traditional Sr ferrite. The new Ca permanent ferrite is expected to be applied in the field of new energy.

关 键 词：M型钙系铁氧体 La-Co取代 磁性能 结构 

分 类 号：TM277.2[一般工业技术—材料科学与工程]