Phase transition temperatures of divalent and trivalent ions substituted (Bi1/2Na1/2)TiO3 ceramics

被引：78

作者：

Hiruma, Yuji ^{[1
]}

Watanabe, Yoshinori ^{[1
]}

Nagata, Hajime ^{[1
]}

Takenaka, Tadashi ^{[1
]}

机构：

[1] Tokyo Univ Sci, Fac Sci & Technol, 2641 Yamazaki, Noda, Chiba 2788510, Japan

来源：

ELECTROCERAMICS IN JAPAN X | 2007年 / 350卷

基金：

日本学术振兴会;

关键词：

lead-free piezoelectric ceramics; bismuth sodium titanate; morphotropic phase boundary; depolarization temperature;

D O I：

10.4028/www.scientific.net/KEM.350.93

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The phase transition temperatures of divalent and trivalent ions substituted (Bi1/2Na1/2)TiO3 ceramics were investigated in detail by electrical measurement. BNT ceramics substituted by divalent (Ca2+ Sr2+ and Ba2+) and trivalent (La3+, Nd3+, Ho3+ and Yb3+) ions were prepared by conventional ceramic fabrication process. For these ceramics, the depolarization temperature, T-d, the rhombohedral-tetragonal phase transition temperature, TR-T, and the temperature of the maximum dielectric constant, T-m, were determined on the basis of the temperature dependences of dielectric and piezoelectric properties. In this study, we demonstrated the relationship between phase transition temperature and ionic radius of ions substituted in the A-site of BNT ceramics.

引用

页码：93 / +

页数：2

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