(BI1/2NA1/2)TIO3-BATIO3 SYSTEM FOR LEAD-FREE PIEZOELECTRIC CERAMICS

被引：2001

作者：

TAKENAKA, T

MARUYAMA, K

SAKATA, K

机构：

[1] Science University of Tokyo, Noda, Chiba

来源：

JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS | 1991年 / 30卷 / 9B期

关键词：

PIEZOELECTRIC CERAMICS; LEAD-FREE; RELAXOR; BISMUTH SODIUM TITANATE; (BI1/2NA1/2)TIO3-BASED; MECHANICAL STRENGTH;

D O I：

10.1143/JJAP.30.2236

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

One of the (Bi1/2Na1/2)TiO3 (BNT)-based solid solutions, Ba-modified bismuth sodium titanate, (Bi1/2Na1/2)1-xBax TiO3 (BNBT), is studied for its dielectric and piezoelectric properties as a new group of lead-free piezoelectric ceramics. A rhombohedral (F(alpha))-tetragonal (F(beta)) morphotropic phase boundary (MPB) is shown to exist at x = 0.06 approximately 0.07 by X-ray data, and dielectric and piezoelectric properties. BNBT ceramics with the MPB composition are superior as piezoelectric ceramics in high-frequency ultrasonic applications or as piezoelectric actuator materials because of a lower free permittivity, epsilon(33)T/epsilon(0), and a high electromechanical coupling factor, k(t) or k33, along with high mechanical strength.

引用

页码：2236 / 2239

页数：4

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