锌掺杂钴铁氧体:硬磁→软磁  

Zinc doped cobalt ferrite:hard magnetic→soft magnetic

作　　者：李诗瑢[1] 任勇[1] 王改花[1] 吕世雅[1] 代波[1] 

机构地区：[1]西南科技大学材料科学与工程学院,四川绵阳621010

出　　处：《功能材料》2013年第3期345-348,共4页Journal of Functional Materials

基　　金：国家重点基础研究发展计划(973计划)资助项目(2011CB612212);教育部新世纪优秀人才支持计划资助项目(MCET-11-1061)

摘　　要：采用共沉淀法制备了不同Zn2+掺杂量的Co1-xZnxFe2O4,研究了Zn2+掺杂量对其结构和磁性的影响。X射线衍射测试表明Co1-xZnxFe2O4成相良好,结晶随烧结温度增加而愈加完善。经400℃热处理2h的Co0.7Zn0.3Fe2O4晶粒尺寸由谢乐公式计算为8.57nm。利用振动样品磁强计研究其静态磁性,结果表明,Zn2+掺杂量对Co1-xZnxFe2O4磁性有显著影响,Zn2+含量越高矫顽力越低,同时饱和磁化强度越大,当x=0.3时,矫顽力仅为1352.82A/m,磁化强度为42A.m2/kg,实现了CoFe2O4从硬磁性到软磁性的转变,可作为潜在的高频软磁材料。Co1-xZnxFe2O4 doped with different amount of zinc were prepared by the chemical co-precipitation method,and the influences of doped zinc on structure and magnetic properties of cobalt ferrite were studied.The average grain size of Co0.7Zn0.3Fe2O4 was 8.566nm at the 400℃ for 2h,which was calculated from X-ray diffraction data according to Scherrer＇s formula.Static magnetism of Co1-xZnxFe2O4 was investigated by vibrating sample magnetometer.Great changes have been found in magnetic properties with the degree of zinc substitution： the value of saturation magnetization increased with increasing of Zn2＋ ion contents,while the coercive force decreased.When x=0.3,the coercive force was only 1352.82A/m and the saturation magnetization was 42A·m2/kg,which realized transition of CoFe2O4 from hard magnetic to soft magnetic,so it can be considered as potential soft magnetic materials at high frequency.

关 键 词：钴锌铁氧体 磁晶各向异性 矫顽力 饱和磁化强度 

分 类 号：TQ138.1[化学工程—无机化工]