Journal
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
Volume 37, Issue 15, Pages 4617-4623Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.jeurceramsoc.2017.06.049
Keywords
Lead-free piezoceramics; Perovskite; Na0.5Bi0.5TiO3
Categories
Funding
- National Nature Science Foundation of China [51402297, 51302144]
- West Light Foundation of the Chinese Academy of Sciences [A14K001]
- Youth Innovation Promotion Association CAS [2016334]
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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.
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