Formation and magnetic properties of M-Sr ferrite hollow fibers via organic gel-precursor transformation process

被引：47

作者：

Song, Fuzhan ^{[1
]}

Shen, Xiangqian ^{[1
]}

Xiang, Jun ^{[1
]}

Song, Haojie ^{[1
]}

机构：

[1] Jiangsu Univ, Sch Mat Sci & Engn, Zhenjiang 212013, Jiangsu, Peoples R China

来源：

MATERIALS CHEMISTRY AND PHYSICS | 2010年 / 120卷 / 01期

基金：

中国博士后科学基金; 中国国家自然科学基金;

关键词：

M-Sr ferrite; Hollow fibers; Magnetic property; Shape anisotropy; BARIUM HEXAFERRITE;

D O I：

10.1016/j.matchemphys.2009.10.048

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The M-Sr ferrite hollow fibers have been successfully prepared by the organic gel-precursor transformation process. The phase formation process of M-Sr ferrite is analyzed by FTIR, XRD and consists of the gel-precursor thermal decomposition and the subsequent ferrite phase formation from strontium oxide and iron oxide. The M-Sr ferrite hollow fibers obtained are characterized with SEM and XRD, and show a high aspect ratio, fine diameters around 4 mu m and a ratio of the hollow diameter to the fiber diameter being about 1/2. The optimized M-Sr ferrite hollow fibers are composed of nanograins with a hexagonal plate morphology. Magnetic properties are measured with VSM under a maximum applied of 1194 kA m(-1). The M-Sr ferrite hollow fibers formed at 1100 degrees C for 2 h with the specific saturation magnetization of 53.5 A m(2) kg(-1) possess a shape anisotropy characteristic and the coercivity for the aligned hollow fibers parallel and perpendicular to the applied field is correspondingly 385 and 357 kA m-1. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：213 / 216

页数：4

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