The structural and magnetic properties of barium ferrite powders prepared by the sol-gel method  

作　　者：Li Jie Zhang Huai-Wu Li Yuan-Xun Liu Ying-Li Ma Yan-Bing 李颉;张怀武;李元勋;刘颖力;马岩冰(School of Microelectronics and Solid-State Electronics,University of Electronic Science and Technology of China,Chengdu 610054,China)

机构地区：[1]School of Microelectronics and Solid-State Electronics,University of Electronic Science and Technology of China,Chengdu 610054,China

出　　处：《Chinese Physics B》2012年第1期467-470,共4页中国物理B（英文版）

基　　金：Project supported by the National Basic Research Program of China(Grant No.2007CB310407);the Science Fund for Creative Research Groups of the National Natural Science Foundation of China(Grant No.61021061);the National Natural Youth Fund of China(Grant No.61001025);National Programs for Science and Technology Development of Guangdong Province,China(Grant No.2010B090400314)

摘　　要：In this paper, M-type hexagonal barium ferrite powders are synthesized using the sol-gel method. A dried precursor heated in air is analyzed in the temperature range from 50 to 1200 ℃ using thermo-gravimetric analysis and differential scanning calorimetry. The effects of the additives and the cacinating temperature on the magnetic properties are investigated, and the results show that single-phase barium ferrite powders can be formed. After heat-treating at 950 ℃ for 4h with 3 wt% additive, the coercivity and saturation magnetization are found to be 440 Oe and 57.9 emu/g, respectively.In this paper, M-type hexagonal barium ferrite powders are synthesized using the sol-gel method. A dried precursor heated in air is analyzed in the temperature range from 50 to 1200 ℃ using thermo-gravimetric analysis and differential scanning calorimetry. The effects of the additives and the cacinating temperature on the magnetic properties are investigated, and the results show that single-phase barium ferrite powders can be formed. After heat-treating at 950 ℃ for 4h with 3 wt% additive, the coercivity and saturation magnetization are found to be 440 Oe and 57.9 emu/g, respectively.

关 键 词：barium ferrite sol-gel method POWDER magnetic property 

分 类 号：TB383.3[一般工业技术—材料科学与工程]