SUPPRESSION OF ACCEPTOR SOLUBILITIES IN BATIO3 DENSIFIED IN HIGHLY REDUCING ATMOSPHERES

被引：32

作者：

BHEEMINENI, V ^{[1
]}

CHANG, EK ^{[1
]}

LAL, M ^{[1
]}

HARMER, MP ^{[1
]}

SMYTH, DM ^{[1
]}

机构：

[1] LEHIGH UNIV,MAT RES CTR,BETHLEHEM,PA 18015

来源：

JOURNAL OF THE AMERICAN CERAMIC SOCIETY | 1994年 / 77卷 / 12期

关键词：

D O I：

10.1111/j.1151-2916.1994.tb04566.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 solubilities of acceptor impurities are strongly suppressed when BaTiO3 is densified in highly reducing atmospheres. This is evidenced by a shift in the minimum in the equilibrium electrical conductivity to higher oxygen activities, a decrease in the ionic contribution to the conductivity, and a decrease in the leakage current and the rate of leakage current degradation under temperature-voltage stress. The normal solubility is restored by subsequent anneals in air that result in substantial grain growth, and the properties then revert to those of BaTiO3 sintered in air. The solubility suppression is attributed to a mass-action interaction between the processes that generate oxygen vacancies, those that result from the compensation of acceptor centers, and those that result from reduction.

引用

页码：3173 / 3176

页数：4

共 15 条

[1]

[Anonymous], [No title captured], Patent No. [3.330.697, 3330697]

[2]

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