Magnetic properties of La-Zn substituted Sr-hexaferrites by self-propagation high-temperature synthesis
来源期刊：JOURNAL OF RARE EARTHS2008年第1期
论文作者：YOU Lishun SHENG Jiawei JIANG Meiyan ZHENG Jingwu QIAO Liang JIANG Liqiang
Key words：high-temperature synthesis; ferrites; substitution; magnetic properties; rare earths;
Abstract: The La-Zn substituted SrM-type ferrites with the composition of Sr1-xLaxFe12-xZnxO19 (x=0-0.4) were prepared by self-propagating high-temperature synthesis (SHS). The single SrM phase was detected by XRD in the as-received samples by controlling the Fe contents in the reagents. The substitution of La3+ and Zn2+ obviously increased the magnetic properties of the as-prepared samples. The maximum improvements of Br, Hcb and (BH)m were 14.4%, 15.3% and 30.7%, respectively compared with that of the samples without La-Zn substitution. Microstructure observation by SEM showed that the SHS method benefited forming the better particle features and achieving the higher Hcj in comparison with the traditional firing method.
YOU Lishun1，SHENG Jiawei1，JIANG Meiyan1，ZHENG Jingwu1，QIAO Liang1，JIANG Liqiang1
(1.College of Chemical Engineering and Materials Science, Zhejiang University of Technology, Hangzhou 310014, China)
Abstract:The La-Zn substituted SrM-type ferrites with the composition of Sr1-xLaxFe12-xZnxO19 (x=0-0.4) were prepared by self-propagating high-temperature synthesis (SHS). The single SrM phase was detected by XRD in the as-received samples by controlling the Fe contents in the reagents. The substitution of La3+ and Zn2+ obviously increased the magnetic properties of the as-prepared samples. The maximum improvements of Br, Hcb and (BH)m were 14.4%, 15.3% and 30.7%, respectively compared with that of the samples without La-Zn substitution. Microstructure observation by SEM showed that the SHS method benefited forming the better particle features and achieving the higher Hcj in comparison with the traditional firing method.
Key words:high-temperature synthesis; ferrites; substitution; magnetic properties; rare earths;
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