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Unique high temperature polarization stability state in Bi 0.5 Na 0.5 TiO 3 –BaTiO 3 system at the morphotropic phase boundary
Author(s) -
Yang Ling,
Zhou Changrong,
Zeng Weidong,
Yuan Changlai,
Chen Guohua,
Xiao Jianrong,
Ma Jiafeng,
Zhou Qin
Publication year - 2015
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.201431864
Subject(s) - phase boundary , materials science , depolarization , polarization (electrochemistry) , condensed matter physics , figure of merit , piezoelectricity , ceramic , analytical chemistry (journal) , phase (matter) , optoelectronics , composite material , chemistry , physics , medicine , organic chemistry , chromatography , endocrinology
The high‐temperature stability of piezoelectric property is an important merit for applications at elevated temperatures. However, understanding the depolarization mechanism is a fundamental issue that remained unclear for decades. In this study, the ex situ depolarization behavior between open‐circuited and short‐circuited annealed samples is measured for (1– x )Bi 0.5 Na 0.5 TiO 3 – x BaTiO 3 (BNT– x BT) ceramics. A unique high temperature polarization stability state with respect to the prominent improvement depolarization temperature is observed for the morphotropic phase boundary (MPB) composition ( x = 0.06) with open‐circuited annealed samples. It is suggested that this enhancement can be attributed to the alignment of the nanodomains induced by the bias fields.