GLASS-FORMATION AND CRYSTALLIZATION OF BARIUM FERRITE IN THE NA2O-BAO-FE2O3-SIO2 SYSTEM

被引：33

作者：

LEE, CK

SPEYER, RF

机构：

[1] School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, 30332-0245, GA

来源：

JOURNAL OF MATERIALS SCIENCE | 1994年 / 29卷 / 05期

关键词：

D O I：

10.1007/BF00975087

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Amorphous ribbons of approximate composition 0.13Na2O-0.30BaO-0.30Fe2O3-0.27SiO2 were successfully fabricated using roller-quenching, after melting at 1400-degrees-C. Devitrification of the amorphous phase by annealing at 710-degrees-C for 2 h formed a uniform distribution of barium ferrite (BaFe12O19) particles with a mean diameter of 55.88 nm. Other crystalline phases formed on heat treatment were BaFe2O4 and Na2Ba2Si2O7. Devitrified ribbons showed a saturation magnetization (M(s)) of 24.41 emu g-1 and a coercivity (H(c)) of 3.06 kOe.

引用

页码：1348 / 1351

页数：4

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