Electrical and magnetic properties of magnesium-substituted lithium ferrite

被引：64

作者：

Fu, Yen-Pei ^{[1
]}

Hu, Shao-Hua ^{[2
]}

机构：

[1] Natl Dong Hwa Univ, Dept Mat Sci & Engn, Shoufeng 974, Hualien, Taiwan

[2] Dahan Inst Technol, Dept Environm Resources Management, Sincheng 971, Hualien, Taiwan

来源：

CERAMICS INTERNATIONAL | 2010年 / 36卷 / 04期

关键词：

Powders: solid state reaction; Electrical properties; Magnetic properties; Spinels; Soft magnets; MICROWAVE-INDUCED COMBUSTION; THERMOELECTRIC-POWER; DIELECTRIC-PROPERTIES; CONDUCTIVITY; LIFE5O8;

D O I：

10.1016/j.ceramint.2009.12.019

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Magnesium-substituted lithium ferrite of different composition (Li(0.5)Fe(2.5-x)Mg(x)O(4-delta)) were prepared for x = 0.0-1.0 by conventional ceramic technique. The crystal structure characterization and morphology were investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM). Initial permeability and quality factor were measured in the frequency range of 1 kHz to 100 MHz. The permeability decreased gradually from mu(f = 10 MHz) = 34.0 for Li(0.5)Fe(2.5)O(4) to mu (f = 10 MHz) = 11.5 for Li(0.5)Fe(1.5)Mg(1.0)O(4). Electrical conductivity measurements were carried in the range of 250-700 degrees C in air. The maximum electrical conductivity, sigma(700 degrees C) = 0.1274 S/cm has been found to be for Li(0.5)Fe(2.5)O(4) specimen. With increasing Mg-substituted content, the decreased in the electrical conductivity. (C) 2010 Elsevier Ltd and Techna Group S.r.l. All rights reserved.

引用

页码：1311 / 1317

页数：7

共 28 条

[1] MICROWAVE LITHIUM FERRITES - OVERVIEW [J].