On the crystal and defect structure of manganese-doped barium titanate ceramics

被引：47

作者：

Langhammer, HT ^{[1
]}

Muller, T ^{[1
]}

Polity, A ^{[1
]}

Felgner, KH ^{[1
]}

Abicht, HP ^{[1
]}

机构：

[1] UNIV HALLE WITTENBERG,DEPT CHEM,D-06099 HALLE,GERMANY

来源：

MATERIALS LETTERS | 1996年 / 26卷 / 4-5期

关键词：

barium titanate (BaT:O-3); manganese-doped; crystal structures; tetragonal; cubic; hexagonal; BATIO3; CERAMICS; MN;

D O I：

10.1016/0167-577X(95)00230-8

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The influence of Mn on the microstructure, crystal structure, thermal expansivity, and positron lifetime of BaTi1-xMnxO3 ceramics (0 less than or equal to x less than or equal to 0.05) was investigated. The crystal structure changes from tetragonal/cubic to hexagonal between x = 0.015 and 0.018 which causes a drastic change in the microstructure and the vanishing of the anomaly of the thermal expansion coefficient for x greater than or equal to 0.018. Several reasons for the stabilization of the hexagonal phase by manganese are discussed. The detected positron trap should be a complex of two singly charged accepters and one doubly charged oxygen vacancy.

引用

页码：205 / 210

页数：6

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