The effect of MgO and rare-earth oxide on formation behavior of core-shell structure in BaTiO3

被引：158

作者：

Kishi, H ^{[1
]}

Okino, Y ^{[1
]}

Honda, M ^{[1
]}

Iguchi, Y ^{[1
]}

Imaeda, M ^{[1
]}

Takahashi, Y ^{[1
]}

Ohsato, H ^{[1
]}

Okuda, T ^{[1
]}

机构：

[1] NAGOYA INST TECHNOL,DEPT MAT SCI & ENGN,SHOWA KU,NAGOYA,AICHI 466,JAPAN

来源：

JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS | 1997年 / 36卷 / 9B期

关键词：

barium titanate; magnesium; holmium; rare-earth oxide; BaTiO3-MgO-Ho2O3; core shell; lattice parameter at high temperatures; acceptor; donor;

D O I：

10.1143/JJAP.36.5954

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The formation mechanism of the core-shell structure of a BaTiO3(BT)-MgO-Ho2O3-based system was studied. Mg reacted with BT at low temperatures and showed poor diffusivity compared with Ho. The core-shell structure was considered to be formed by the suppression of the diffusion of Ho into the core region by Mg. Also, replacement modes of Mg and Ho in perovskite were investigated. Lattice parameters were determined at temperatures higher than the Curie temperature in order to avoid crystal structure change. It was confirmed that Mg dissolved in Ti site, and Ho dissolved in both Ba and Ti sites. This indicates that Mg ions act as accepters and Ho ions act as both donors and accepters in the shell phase.

引用

页码：5954 / 5957

页数：4

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