Phase diagram of unpoled lead-free (1-x)(Bi1/2Na1/2)TiO3–xBaTiO3 ceramics
Date
Authors
Major Professor
Advisor
Committee Member
Journal Title
Journal ISSN
Volume Title
Publisher
Authors
Research Projects
Organizational Units
Journal Issue
Is Version Of
Versions
Series
Department
Abstract
A phase diagram for unpoled ceramics in the lead-free (1−x)(Bi1/2Na1/2)TiO3–xBaTiO3 binary system is constructed for the first time based on transmission electron microscopy (TEM) and dielectric study. In contrast to the reported phase diagram determined using poled ceramics, an additional phase region exhibiting P4bm nanodomains was revealed. A new concept “relaxor antiferroelectric” was proposed to describe the unique short-range antiferroelectric order of this phase. The results suggest that electric field-induced phase transitions must be taken into consideration in optimizing the piezoelectric properties in these lead-free ceramics.
Comments
NOTICE: this is the author’s version of a work that was accepted for publication in Solid State Communications. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Solid State Communications 150, 1497-1500 (2010). DOI: 10.1016/j.ssc.2010.06.006.