Journal
SCRIPTA MATERIALIA
Volume 75, Issue -, Pages 70-73Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2013.11.025
Keywords
Bi4Ti3-x(Mg1/3Nb2/3)(x)O-12; Aurivillius ferroelectric ceramics; Piezoelectricity; Rietveld refinement; Leakage current
Categories
Funding
- National Natural Science Foundation [51172187]
- SRPDF [20116102130002, 20116102120016]
- 111 Program of MOE [B08040]
- Shaanxi Province Science Foundation [2013KW12-02]
- Excellent Doctorate Foundation of NPU
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The effect of Mg2+/Nb5+ co-substitution at the B-site on the structures and electrical properties of modified Aurivillius ceramics, Bi4Ti3-x(Mg1/3Nb2/3)(x)O-12, was investigated. Rietveld refinement suggested that Bi4Ti3-x(Mg1/3Nb2/3)(x)O-12 crystallized in the orthorhombic space group B2cb at room temperature. A high remnant polarization of 15.5 mu C cm(-2), a large field-induced strain of 0.068% and a high piezoelectric activity of 30 pC N-1 were observed in Bi4Ti2.95(Mg1/3Nb2/3)(0.05)O-12, with a Curie point of 685 degrees C, due to an enhancement in structural distortion and a reduction in leakage current.,. (C) 2013 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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