Author(s): Tong, XY (Tong, Xing-Ye); Zhou, JJ (Zhou, Jia-Jun); Wang, K (Wang, Ke); Liu, H (Liu, Hong); Fang, JZ (Fang, Jing-Zhong)

Source: JOURNAL OF THE EUROPEAN CERAMIC SOCIETY  Volume: 37  Issue: 15  Pages: 4617-4623  DOI: 10.1016/j.jeurceramsoc.2017.06.049  Published: DEC 2017  

Abstract: Lead-free Bi0.5Na0.5TiO3-SrTiO3 incipient piezoceramics with Li2CO3 and MnO2 additives were successfully fabricated at low firing temperature for applications in co-fired multilayer piezoactuators. The addition of Li2CO3 effectively shifted the sintering temperature from 1230 degrees C down to 1075 degrees C, where the ceramics were co-fired with a Ag/Pd (75/25) inner electrode. The prototype actuators were prepared by tape-casting method using ceramics with the composition of 0.74Bi(0.5)Na(0.5)TiO(3)-0.26 SrTiO3 + 0.15 wt%MnO2 + 0.45 wt%Li2CO3. The total number of active layers was 13, and each ceramic layer had a thickness of 60 pm. The actuator output a large strain up to similar to 0.20% at a driving field of 4 kV/mm, due to the field-induced phase transition between the ergodic relaxor and ferroelectric phases. The excellent voltage-displacement performance of the prototype actuator demonstrates the potential for industrial applications. (C) 2017 Elsevier Ltd. All rights reserved.

IDS Number: FH6ON

ISSN: 0955-2219