掺杂M型钡铁氧体纳米粉体的制备与软磁化研究  

Fabrication and Tunable Soft Magnetic Properties of M-type Barium Ferrite

作　　者：吕世雅[1] 任勇[1] 徐光亮[1] 李诗瑢[1] 

机构地区：[1]西南科技大学新材料研究所,四川省非金属复合与功能材料重点实验室-省部共建国家重点实验室培育基地,绵阳621010

出　　处：《人工晶体学报》2012年第4期1070-1075,共6页Journal of Synthetic Crystals

基　　金：四川省非金属复合与功能材料重点实验室-省部共建国家重点实验室培育基地开放基金(11zxfk24;10zxfk28);西南科技大学博士研究基金资助项目(10zx7117)

摘　　要：采用溶胶-凝胶自蔓延法制备Co-Zr离子共掺BaFe12O19,并研究不同掺杂量和煅烧温度对样品微结构和磁性能的影响。利用X射线衍射仪、扫描电镜测试了样品的相结构和微观形貌,其宏观静态磁性用振动样品磁强计进行表征。研究发现热处理温度对掺杂前后的M型钡铁氧体宏观磁性有决定性影响,其中BaFe10Co1.0Zr1.0O19在1100℃保温4 h,矫顽力Hc为136 Oe,但是饱和磁化强度Ms仅32 emu/g;BaFe10.4Co0.8Zr0.8O19在1100℃保温4 h,矫顽力为606 Oe,Ms增加到48 emu/g。这说明M型钡铁氧体的磁性能可以实现从传统的永磁到近软磁这样大范围的调控,使其拥有更广泛地应用空间。Co-Zr substituted BaM ferrite particles were prepared by the sol-gel method, the influence of temperature on mierostructure and magnetic properties was studied. Phase structure and microscope image of sample were investigated by X-ray diffraction and scanning electron microscopy, its static magnetic properties were studied by a vibrating sample magnetometer. It is found that the temperature of heat treatment determine the magnetic properties of M-type barium ferrite in before and after ion doping. Furthermore, coercivity of BaFe9.6Co1.2Zr1.2O19 is only 136 Oe and saturation magnetization is 32 emu/g after heat treatment at 1100 ℃ for 4 h, and coereivity of BaFe10.4Co0.8Zr0.8 O 19 is 606 Oe, the saturation magnetization is 48 emu/g after heat treatment at 1100 ℃ for 4 h. This wide tailoring of coercivity and saturation magnetization makes more promising applications of BaM ferrite.

关 键 词：M型钡铁氧体 软磁化 晶位 磁晶各向异性 

分 类 号：TB321[一般工业技术—材料科学与工程]