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

稀土学报(英文版), 2013, (10): 983-987. doi: 10.1016/S1002-0721(12)60390-1

李颉 ^1, , 张怀武 ^2, , 李强 ^3, , 李元勋 ^4, , 郁国良 ^5,

1.State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu 610054, China

2.State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu 610054, China

3.State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu 610054, China

4.State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu 610054, China

5.State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu 610054, China

基金项目: the National Basic Research Program of China(2012CB933100) National Natural Science Foundation of China(61001025,60721001,51132003,61171047)

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

LI Jie ^1, , ZHANG Huaiwu ^2, , LI Qiang ^3, , LI Yuanxun ^4, , YU Guoliang ^5,

1.State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu 610054, China

2.State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu 610054, China

3.State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu 610054, China

4.State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu 610054, China

5.State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu 610054, China

Keywords： M-type barium ferrites

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)xFe12-2xO19 (x=0.0-0.5) 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 (Hc) reached the maximum value of 65.15 Am2/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.

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

参考文献