Mechanism of improvement of resistance degradation in Y-doped BaTiO3 based MLCCs with Ni electrodes under highly accelerated life testing

被引：74

作者：

Sato, S ^{[1
]}

Nakano, Y ^{[1
]}

Sato, A ^{[1
]}

Nomura, T ^{[1
]}

机构：

[1] TDK Corp, Mat Res Ctr, Nimani Hatori, Narita 2868588, Japan

来源：

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 1999年 / 19卷 / 6-7期

关键词：

Ni electrode; defects; lifetime; BaTiO3 and titanates; capacitors;

D O I：

10.1016/S0955-2219(98)00374-4

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The mechanism of improvement of resistance degradation irt Y-doped BaTiO3 based multilayer ceramic capacitors (MLCCs) with Ni electrodes has been studied using electrical measurement techniques, minor phase identification and rite measurement of oxygen vacancy concentration. Admittance spectroscopy and thermally stimulated current measurements show the relaxation due to barium vacancy states caused by Y doping. The minor phase identification by XRD indicated those Y3+ substitutes for perovskite A-site. Oxygen vacancy concentration measurement indicated that Y decreases the oxygen ion vacancy concentration in BaTiO3. These results suggest that Y3+ acts as a donor and creates barium vacancies, which compensate for the oxygen vacancies and thereby improve the resistance degradation. (C) 1999 Published by Elsevier Science Limited. All rights reserved.

引用

页码：1061 / 1065

页数：5

共 7 条

[1] REVERSIBLE WEIGHT CHANGE OF ACCEPTOR-DOPED BATIO3 [J].

HAGEMANN, HJ ;

HENNINGS, D .

JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 1981, 64 (10) :590-594

[2]

HITOMI A, 1997, 8 US JAP SEM DIEL PI, P44

[3]

HITOMI A, 1993, J JPN SOC POWDER POD, V39, P455

[4]

Nakano Y., 1993, Ceram. Trans, V32, P119

[5]

NOMURA T, 1992, J JPN SOC POWDER POW, V39, P590

[6]

NOMURA T, 1993, J JPN SOC POWDER POW, V40, P677

[7]

NOMURA T, 1993, DENSHI TOKYO, V31, P168

← 1 →