Strontium hexaferrite powders prepared by a microwave-induced combustion process and some of their properties

被引:46
作者
Fu, YP [1 ]
Lin, CH [1 ]
Pan, KY [1 ]
机构
[1] Natl Tsing Hua Univ, Dept Mat Sci & Engn, Hsinchu 300, Taiwan
关键词
strontium ferrite; combustion synthesis; VSM;
D O I
10.1016/S0925-8388(02)00867-8
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Strontium hexaferrite powders were successfully synthesized by a microwave-induced combustion process. The process only took a few minutes to obtain calcined strontium hexaferrite powders. The resultant powders were investigated by XRD, TEM, VSM, TG/DTA, and surface area measurement. The as-received product shows strontium ferrite with a saturation magnetization (M-N) of approximate to38 emu/g and an intrinsic coercive force (H-i(c)) of 525 Oe, whereas, upon annealing at 1000 degreesC for 2 h, the saturation magnetization increases to 62 emu/g and the intrinsic coercive force reaches 1950 Oe. (C) 2002 Elsevier Science B.V. All rights reserved.
引用
收藏
页码:228 / 231
页数:4
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