Field enhanced bulk conductivity of acceptor-doped BaTi1-xCaxO3-x ceramics

被引：40
|
作者：
Maso, Nahum [1 ]
Prades, Marta [2 ]
Beltran, Hector [2 ]
Cordoncillo, Eloisa [2 ]
Sinclair, Derek C. [1 ]
West, Anthony R. [1 ]
机构：
[1] Univ Sheffield, Dept Mat Engn, Sheffield S1 3JD, S Yorkshire, England
[2] Univ Jaume 1, Dept Quim Inorgan & Organ, Castellon de La Plana 12071, Spain
来源：
APPLIED PHYSICS LETTERS | 2010年 / 97卷 / 06期
基金：
英国工程与自然科学研究理事会;
关键词：
barium compounds; ceramics; electrical conductivity; RESISTANCE DEGRADATION BEHAVIOR; MG CONCENTRATION; BATIO3; CERAMICS;
D O I：
10.1063/1.3476355
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The electrical properties of Ca-doped BaTiO3 are very different when Ca substitutes onto Ba or Ti sites. The p-type semiconductivity of Ti-substituted ceramics increases reversibly by one to two orders of magnitude under a dc-bias voltage of <= 100 V cm(-1), whereas Ba-substituted ceramics show little sensitivity to a dc bias. This increase in BaTi1-xCaxO3-x, studied over the temperature range 150-600 degrees C, is independent of electrode material and atmosphere and is attributed to ionization of underbonded O2- ions adjacent to acceptor-doped Ca2+ ions. (C) 2010 American Institute of Physics. [doi:10.1063/1.3476355]
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页数：3
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