Electric-field-induced strain for (Bi1/2Na1/2)TiO3-based lead-free multilayer actuator

被引：35

作者：

Nagata, Hajime ^{[1
]}

Hiruma, Yuji ^{[1
]}

Takenaka, Tadashi ^{[1
]}

机构：

[1] Tokyo Univ Sci, Dept Elect Engn, Fac Sci & Technol, Chiba 2788510, Japan

来源：

JOURNAL OF THE CERAMIC SOCIETY OF JAPAN | 2010年 / 118卷 / 1380期

关键词：

Lead-free; Multilayer ceramic actuator; Electric-field-induced strain; Bismuth sodium titanate; FREE PIEZOELECTRIC CERAMICS; PHASE-TRANSITION TEMPERATURES; FERROELECTRIC CERAMICS; TITANATE CERAMICS; RESIDUAL-STRESS; NI-ELECTRODES; CAPACITORS; SYSTEM; NA0.5BI0.5TIO3; PERFORMANCE;

D O I：

10.2109/jcersj2.118.726

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：

Multilayer prototype actuators were demonstrated using (Bi1/2Na1/2)TiO3 [BNT]-based ceramics as active layers and Pt as internal electrodes. One of the BNT-based solid solutions, 0.68(Bi1/2Na1/2)TiO3-0.04(Bi1/2Li1/2)TiO3-0.28(Bi1/2K1/2)TiO3 (BNLKT4-28) has been selected as the an active layer and it showed a relatively large piezoelectric strain constant d(33) of 130 pC/N and a high depolarization temperature T-d of 226 degrees C. The total number of layers was 10 and the active layer thickness was 125 mu m for the sintered body. The final compact dimensions were approximately 5 x 5 x 2 mm(3). From the SEM observation, there were no apparent delaminations around the interface between Pt electrodes and active BNLKT layers. The large electric-field-induced strain at 70 kV/cm was 0.17% and the longitudinal dynamic displacement at the same electric field was 2.1 mu m. (C) 2010 The Ceramic Society of Japan. All rights reserved.

引用

页码：726 / 730

页数：5

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