Grain boundary structure and composition in strontium titanate

被引：26

作者：

Pan, X

Gu, H

Stemmer, S

Ruhle, M

机构：

来源：

INTERGRANULAR AND INTERPHASE BOUNDARIES IN MATERIALS, PT 1 | 1996年 / 207-卷

关键词：

strontium titanate; SrTiO3; segregation; grain boundary; HRTEM; EELS;

D O I：

10.4028/www.scientific.net/MSF.207-209.421

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Grain boundaries (GBs) in Fe-doped SrTiO3 were investigated by high resolution transmission electron microscopy and spatially resolved electron energy loss spectroscopy (SREELS). Special GBs, such as Sigma 3 (111) and Sigma 5 (310), are free of any amorphous phase, while ''arbitrary'' GBs in polycrystalline SrTiO3 contain an amorphous film with an average thickness of 0.7+/-0.2 nm. Chemical analysis using SREELS showed that the Ti/O ratio at the GB is higher than in the bulk, which is insensitive to the Fe doping. Segregation of acceptor dopant Fe was detected at GBs.

引用

页码：421 / 424

页数：4

共 9 条

[1] GRAIN-BOUNDARY CHEMISTRY OF BARIUM-TITANATE AND STRONTIUM-TITANATE .2. ORIGIN OF ELECTRICAL BARRIERS IN POSITIVE-TEMPERATURE-COEFFICIENT THERMISTORS [J].