ELECTRICAL-PROPERTIES OF POLYCRYSTALLINE NICKEL ZINC FERRITES

被引:79
作者
IRVINE, JTS [1 ]
HUANOSTA, A [1 ]
VALENZUELA, R [1 ]
WEST, AR [1 ]
机构
[1] NATL AUTONOMOUS UNIV MEXICO,INST INVEST MAT,MEXICO CITY 04510,DF,MEXICO
关键词
electrical properties; ferrites; grain boundaries; nickel; zinc;
D O I
10.1111/j.1151-2916.1990.tb06580.x
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
The electrical properties of three ferrites of composition (Ni0.36Zn0.64)1–xFe2+xO4, x=−0.03, 0, 0.13, were investigated by impedance spectroscopy. The observed impedance responses corresponded to that of a highly resistive grain‐boundary component in series with a less resistive bulk component. Bulk resistances gave linear Arrhenius conductivity plots (Ea≤0.25 eV) that were independent of thermal cycling. Grain‐boundary resistances changed greatly on cycling between room temperature and 200°C, probably because of changes in the extent of oxidation at the grain boundaries. Copyright © 1990, Wiley Blackwell. All rights reserved
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页码:729 / 732
页数:4
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