HIGH-RESOLUTION ELECTRON-MICROSCOPY STUDY OF (BASRCA)TIO3 CERAMICS

被引：4

作者：

KOSEKI, K

NAKANO, Y

NOMURA, T

ISSHIKI, T

NISHIO, K

SAIJO, H

SHIOJIRI, M

机构：

[1] KYOTO INST TECHNOL,DEPT ELECTR & INFORMAT SCI,SAKYO KU,KYOTO 606,JAPAN

[2] TDK CORP,MAT RES CTR,NARITA 286,JAPAN

来源：

PHYSICA STATUS SOLIDI A-APPLIED RESEARCH | 1994年 / 143卷 / 02期

关键词：

D O I：

10.1002/pssa.2211430207

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

(BaSrCa)TiO3 ceramics used as varistors are investigated by high-resolution electron microscopy with the aid of image simulation. Two samples prepared by slightly different reducing heat treatments are observed. One is composed of large crystalline grains and microcrystalline regions (or grains), both of which have the same chemical composition, and also amorphous grain boundary areas rich in SiO2, MgO, and BaO. The other is only composed of well-developed crystalline grains with a boundary of facet structure. The interface between facets of the bicrystals is the composition plane of the (111bar) twin, and is not a Ti layer but a (BaSrCa)-O3 layer. The atomic projection of the crystals near the grain boundary is also described.

引用

页码：245 / 253

页数：9

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