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Relaxor to Ferroelectric Transitions in ( Bi 1/2 Na 1/2 ) TiO 3 – Bi ( Zn 1/2 Ti 1/2 ) O 3 Solid Solutions
Author(s) -
Patterson Eric A.,
Cann David P.
Publication year - 2012
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1551-2916.2012.05320.x
Subject(s) - ferroelectricity , materials science , dielectric , hysteresis , analytical chemistry (journal) , mineralogy , chemistry , physics , condensed matter physics , chromatography , optoelectronics
Recently, ( Bi 1/2 Na 1/2 ) TiO 3 solid solutions have been found to exhibit excellent dielectric and piezoelectric properties. In this study, the dielectric and ferroelectric properties of (1– x )( Bi 1/2 Na 1/2 ) TiO 3 – x Bi (Zn 1/2 Ti 1/2 )O 3 ( BNT – BZT ) solid solutions were investigated. Up to a solubility limit of 8% BZT , distortions to the parent cubic perovskite phase were observed in the diffraction data through splitting of the (001), (011), and (111) reflections. At low concentrations of BZT , the material behaved very much like a conventional ferroelectric, with well‐saturated loops with high remanent polarization ( P r ~ 35 μC/cm 2 ). As the BZT content increased, the dielectric behavior displayed characteristics of relaxor behavior. Polarization hysteresis data at elevated temperatures and a thermal hysteresis in the dielectric maximum were evidence for a relaxor to ferroelectric transition.