Journal
MATERIALS LETTERS
Volume 174, Issue -, Pages 242-245Publisher
ELSEVIER
DOI: 10.1016/j.matlet.2016.03.130
Keywords
Aurivillius ceramics; Electromechanical properties; Conductivity; Structure
Funding
- National Natural Science Foundation of China [51172187]
- SPDRF [20116102130002]
- MOE [B08040]
- Xi'an Science and Technology Foundation [CXY1510-2]
- Fundamental Research Funds for the Central Universities of China [3102014JGY01004]
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(B-1/3/Nb-2/3) (B =Mg, Zn, Cu) co-substituting for Ti4+ in B-site of Bi4Ti3O12-based Aurivillius ceramics were prepared to improve the piezoelectric properties. The electrical properties and conduction mechanisms of them were investigated. The activation energy related with the electrical relaxation determined from the electric modulus spectra was 0.71 eV and the electrical conductivity decreased dramatically by (Mg1/3Nb2/3)-doping, due to the enhanced structural distortion and the decrease in oxygen vacancy concentration. The (Mg-1/3/Nb-2/3)-substituted specimen with a Curie point of 686 degrees C and a large field-induced strain of 0.061% as well as a higher remnant polarization of 12.9 mu C/cm(2) could be a promising material for high-temperature lead-free piezoelectric applications. (C) 2016 Elsevier B.V. All rights reserved.
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