Visualization of Grain Boundary as Blocking Layer for Oxygen Tracer Diffusion and a Proposed Defect Model in Non Doped BaTiO3 Ceramics

被引：21
|
作者：
Watanabe, Ken [2 ,3 ]
Sakaguchi, Isao [1 ]
Hishita, Shunichi [1 ]
Ohashi, Naoki [1 ]
Haneda, Hajime [1 ]
机构：
[1] Natl Inst Mat Sci, Opt & Elect Mat Unit, Tsukuba, Ibaraki 3050044, Japan
[2] Natl Inst Mat Sci, ICYS, Tsukuba, Ibaraki 3050044, Japan
[3] Natl Inst Mat Sci, Int Ctr Mat Nanoarchitecton MANA, Tsukuba, Ibaraki 3050044, Japan
来源：
APPLIED PHYSICS EXPRESS | 2011年 / 4卷 / 05期
关键词：
SEMICONDUCTING BARIUM TITANATE; NICKEL ELECTRODES; CAPACITORS; RESISTIVITY; DEGRADATION;
D O I：
10.1143/APEX.4.055801
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We performed visualization of the oxygen diffusion path in oxidized and reduced BaTiO3 ceramics by utilizing an ion-imaging technique. The oxygen tracer diffused quickly from the surface up to the grain boundary, and then behaved as discontinuous steps at the grain boundary. The grain boundary acted as a blocking layer against oxygen diffusion. The reduction process enhanced the blocking effect. The blocking of oxygen diffusion at the grain boundary originated in the formation and distribution of complex defects between the charged oxygen vacancy and the reduced Ti near the grain boundary. (C) 2011 The Japan Society of Applied Physics
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页数：3
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