期刊
JOURNAL OF RARE EARTHS
卷 26, 期 1, 页码 81-84出版社
ELSEVIER
DOI: 10.1016/S1002-0721(08)60042-3
关键词
high-temperature synthesis; ferrites; substitution; magnetic properties; rare earths
The La-Zn substituted SrM-type ferrites with the composition of Sr1-x,LaxFe12-x,ZnxO19 (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 B-r, H-cb 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 H-cj in comparison with the traditional firing method.
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