Jo, Wook, Daniels, John E., Jones, Jacob L., Tan, Xiaoli, Thomas, Pam A., Damjanovic, Dragan and Rödel, Jürgen (2011) Evolving morphotropic phase boundary in lead-free (Bi1/2Na1/2)TiO3–BaTiO3 piezoceramics. Journal of Applied Physics, Vol.109 (No.1). 014110. doi:10.1063/1.3530737 ISSN 0021-8979.

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Abstract

The correlation between structure and electrical properties of lead-free (1-x)(Bi(1/2)Na(1/2))TiO(3)-xBaTiO(3) (BNT-100xBT) polycrystalline piezoceramics was investigated systematically by in situ synchrotron diffraction technique, combined with electrical property characterization. It was found that the morphotropic phase boundary (MPB) between a rhombohedral and a tetragonal phase evolved into a morphotropic phase region with electric field. In the unpoled material, the MPB was positioned at the transition from space group R3m to P4mm (BNT-11BT) with optimized permittivity throughout a broad single-phase R3m composition regime. Upon poling, a range of compositions from BNT-6BT to BNT-11BT became two-phase mixture, and maximum piezoelectric coefficient was observed in BNT-7BT. It was shown that optimized electrical properties are related primarily to the capacity for domain texturing and not to phase coexistence.

Item Type:	Journal Article
Subjects:	Q Science > QC Physics
Divisions:	Faculty of Science, Engineering and Medicine > Science > Physics
Library of Congress Subject Headings (LCSH):	Piezoelectric materials -- Structure, Piezoelectric materials -- Electric properties
Journal or Publication Title:	Journal of Applied Physics
Publisher:	American Institute of Physics
ISSN:	0021-8979
Official Date:	1 January 2011
Dates:	Date Event 1 January 2011 Published
Volume:	Vol.109
Number:	No.1
Page Range:	014110
DOI:	10.1063/1.3530737
Status:	Peer Reviewed
Publication Status:	Published
Access rights to Published version:	Restricted or Subscription Access
Date of first compliant deposit:	19 December 2015
Date of first compliant Open Access:	19 December 2015
Funder:	ADRIA, Australian Institute of Nuclear Science and Engineering (AINSE), United States. Dept. of the Army, National Science Foundation (U.S.) (NSF)
Grant number:	W911NF-09-1-0435 (Army), DMR-0746902 (NSF)

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