The influence of grain boundary internal stress on permeability: temperature curve for Mn-Zn ferrites

被引：29

作者：

Chen, SH

Chang, SC

Lin, IN

机构：

[1] Natl Tsing Hua Univ, Dept Mat Sci & Engn, Hsinchu 30043, Taiwan

[2] Natl Tsing Hua Univ, Ctr Mat Sci, Hsinchu 30043, Taiwan

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2000年 / 209卷 / 1-3期

关键词：

mu(i)-T characteristics; internal stress; external stress; ferrites;

D O I：

10.1016/S0304-8853(99)00685-X

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The oxygen partial pressure (PO2) utilized in homogenization or cooling stage of sintering process has been observed to significantly influence the initial permeability-temperature (mu(i)-T) characteristics of the materials. Higher oxygen partial pressure (PO2) during homogenization period lowers the mu(i)-value without shifting the secondary maximum peak (T-smp). However, higher PO2 (0.1%) during cooling period shifts the T-smp toward lower-temperature regime. This phenomenon is accounted for by the induction of compressive stress onto the ferrite grains, which in turn, is due to preferential oxidation along grain boundaries. (C) 2000 Elsevier Science B,V. All rights reserved.

引用

页码：193 / 196

页数：4