Preparation and dielectric characterizations of the novel perovskite-type oxides (Ln1/2Na1/2)TiO3 (Ln = Dy, Ho, Er, Tm, Yb, Lu)

被引：38
|
作者：
Shan, YJ
Nakamura, T
Inaguma, Y
Itoh, M
机构：
[1] Utsunomiya Univ, Fac Engn, Dept Appl Chem, Utsunomiya, Tochigi 321, Japan
[2] Tokyo Inst Technol, Mat & Struct Lab, Midori Ku, Yokohama, Kanagawa 226, Japan
来源：
SOLID STATE IONICS | 1998年 / 108卷 / 1-4期
关键词：
lanthanide sodium titanates; perovskite-type oxide; Rietveld refinement; dielectric property; quantum paraelectric behavior;
D O I：
10.1016/S0167-2738(98)00029-0
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The novel perovskite-type oxides (Ln(1/2)Na(1/2))TiO3 (Ln = Dy, Ho, Er, Tm, Yb, Lu) were synthesized, and their crystal structures and dielectric properties were examined. (Ln(1/2)Na(1/2))TiO3 (Ln = Dy, Ho, Er, Tm, Yb, Lu) possess an orthorhombic symmetry with space group Pnma similar to (Ln(1/2)Na(1/2))TiO3 (Ln = Pr, Nd, Sm, Eu, Gd and Tb). Their lattice parameters and dielectric constants decrease with an increase in the atomic number of Ln (Ln = Dy to Lu). At low temperatures, (Ln(1/2)Na(1/2))TiO3 (Ln = Dy, Ho, Er, Tm, Yb, Lu) shows quantum paraelectric behavior. (C) 1998 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：123 / 128
页数：6
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