Preparation of magnetic glass-ceramics through glass crystallization in the Na2O-SrO-Fe2O3-B2O3 system

被引：0
|
作者：
D. D. Zaitsev
E. A. Gravchikova
P. E. Kazin
A. V. Garshev
Yu. D. Tret’yakov
M. Jansen
机构：
[1] Moscow State University,
[2] Max-Planck-Institut für Festkörperforschung,undefined
来源：
Inorganic Materials | 2006年 / 42卷
关键词：
Oxide; Electron Microscopy; Crystallization; Thermal Analysis; Strontium;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
Glasses with the nominal compositions SrFe12O19 + nNa2Sr2B4O9 (n = 4, 6, 8, 10) and SrFe12O19 + 6Na2Sr3B4O10 were prepared via rapid quenching of oxide melts and were then heat-treated between 500 and 800°C in order to produce glass-ceramics containing fine SrFe12O19 particles. The materials were characterized by x-ray diffraction, differential thermal analysis, electron microscopy, and magnetic measurements. The crystallization behavior of the glasses was investigated. The coercivity of the glass-ceramics was shown to increase with heat-treatment temperature, up to 486 kA/m. By dissolving the nonmagnetic matrix of the glass-ceramics with the nominal compositions SrFe12O19 + 6Na2Sr3B4O10 and SrFe12O19 + 4Na2Sr2B4O9, submicron-sized strontium hexaferrite particles were obtained.
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页码：326 / 330
页数：4
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