Fe/Sr ratio effect on magnetic properties of strontium ferrite powders synthesized microwave-induced combustion process

被引：97

作者：

Fu, YP ^{[1
]}

Lin, CH ^{[1
]}

机构：

[1] Wu Feng Inst Technol, Dept Chem Engn, Chiayi, Taiwan

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2005年 / 386卷 / 1-2期

关键词：

strontium ferrite powder; combustion synthesis; VSM; saturation magnetization; intrinsic coercive force;

D O I：

10.1016/j.jallcom.2004.04.148

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 [物理化学]; 081704 [应用化学];

摘要：

Strontium hexaferrite nano-particles were successfully synthesized by microwave-induced combustion process. Magnetic properties of strontium ferrite powders with Fe/Sr ratios varying from 11 to 12 and different annealing temperatures range of 850 to 1050degreesC were studied. The resultant powders were investigated by XRD, TEM, SEM, VSM, TG/DTA, and surface area measurement. The optimum magnetic properties of strontium ferrite powders were as follows: the composition with an Fe/Sr ratio of 11.6 annealed at 1000degreesC for 2 It possessed a saturation magnetization of 62 emu/g and an intrinsic coercive force of 1950 Oe. Moreover, the microwave-heated strontium ferrite powders with a Fe/Sr ratio of 11.6 annealed at various temperatures had particle size ranging from 52 to 78 nm. Low-coercivity strontium ferrite powders can be obtained by microwave-induced combustion process without doping with metal elements such as Co-Ti, Co-Sn, Zn-Sn, etc. These low coercive strontium ferrite powders are suitable for magnetic recording applications in hard disks, floppy disks, video tapes, etc. (C) 2004 Elsevier BN. All rights reserved.

引用

页码：222 / 227

页数：6

共 15 条

[1]

MAGNETIC-PROPERTIES OF HYDROTHERMALLY SYNTHESIZED STRONTIUM HEXAFERRITE AS A FUNCTION OF SYNTHESIS CONDITIONS [J].