The effect of rare-earth (La, Sm, Dy, Ho and Er) and Mg on the microstructure in BaTiO3

被引：250

作者：

Kishi, H

Kohzu, N

Sugino, J

Ohsato, H

Iguchi, Y

Okuda, T

机构：

[1] Taiyo Yuden Co Ltd, Haruna, Gunma 3703347, Japan

[2] Nagoya Inst Technol, Showa Ku, Nagoya, Aichi 4668555, Japan

来源：

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

关键词：

rare earth; microstructure-final; X-ray methods; BaTiO3 and titanates; capacitors;

D O I：

10.1016/S0955-2219(98)00370-7

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 effect of rare-earth elements, La, Sm, Dy, Ho and Er, on the microstructure in BaTiO3(BT)-MgO-rare-earth oxide based system was studied Larger amount of MgO was required to suppress the grain growth for the larger ionic radius rare-earth ion (La, Sm)-doped samples than for rite smaller ion (Dy, Ho, Er)-doped samples. Also, substitution modes of rare-earth elements and Mg in BT lattice were investigated The solubility of rare-earth th ions in BT lattice and the substitution ratio of ml e-earth ions into Ba-site decreased as ionic radius decreases. This suggests that the formation of core-shell structures in BT-MgO-rare-earth oxide based system is dependent on the substitution ratio of rare-ear th ions into Ba-site. (C) 1999 Elsevier Science Limited. All rights reserved.

引用

页码：1043 / 1046

页数：4

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