Influence of La-Co substitution on the structure and magnetic properties of low-temperature sintered M-type barium ferrites  

作　　者：李颉 张怀武 李强 李元勋 郁国良 

机构地区：[1]State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China

出　　处：《Journal of Rare Earths》2013年第10期983-987,共5页稀土学报（英文版）

基　　金：Project supported by the National Basic Research Program of China(2012CB933100);National Natural Science Foundation of China(61001025,60721001,51132003,61171047);support of the Fundamental Research Funds for the Central Universities (ZYGX2011X006);the second item of strongpoint industry of Guangdong province (2012A090100001);the Opening Fund of State Key Laboratory of Electronic Thin Films and Integrated Devices (KFJJ201102)

摘　　要：La-Co substituted M-type barium ferrites （BaM） were prepared by traditional solid state method and sintered at low tem- perature （1173 K）. X-ray diffraction （XRD）, scanning electron microscopy （SEM） and vibrating sample magnetometer （VSM） were employed to investigate the influence of La-Co on the structure and magnetic properties of the samples. By sintering at 1173 K for 6 h in air, single phase M-type barium ferrites with chemical composition of Ba（LaCo）xFel〉z^Oj9 （x=0.0~）.5） were formed. M-H curves showed that the magnetic properties of barium ferrites were obviously effected by La-Co substitution. The saturation magnetization （Ms） and coercivity （He） reached the maximum value of 65.15 AmZ/kg and 4165 Oe, respectively. This behavior was attributed to the sites of La-Co substitutions and the particles size. SEM revealed that the shape of ferrite particles was influenced by La-Co substitution.La-Co substituted M-type barium ferrites （BaM） were prepared by traditional solid state method and sintered at low tem- perature （1173 K）. X-ray diffraction （XRD）, scanning electron microscopy （SEM） and vibrating sample magnetometer （VSM） were employed to investigate the influence of La-Co on the structure and magnetic properties of the samples. By sintering at 1173 K for 6 h in air, single phase M-type barium ferrites with chemical composition of Ba（LaCo）xFel〉z^Oj9 （x=0.0~）.5） were formed. M-H curves showed that the magnetic properties of barium ferrites were obviously effected by La-Co substitution. The saturation magnetization （Ms） and coercivity （He） reached the maximum value of 65.15 AmZ/kg and 4165 Oe, respectively. This behavior was attributed to the sites of La-Co substitutions and the particles size. SEM revealed that the shape of ferrite particles was influenced by La-Co substitution.

关 键 词：M-type barium fenites La-Co substitution magnetic properties rare earths 

分 类 号：TM277[一般工业技术—材料科学与工程] TQ174.758[电气工程—电工理论与新技术]