Open AccessTuning the ferroelectric, dielectric and photoluminescence properties of 0.88(Na0.5Bi0.5)TiO3-0.12BaTiO3 ceramics by Sm ion doping
Author(s) -
Yong Li,
Jun Zhao,
Xinglei Zhang,
QianNan Jia,
Xihong Hao
Publication year - 2019
Publication title -
journal of advanced dielectrics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.38
H-Index - 13
eISSN - 2010-135X
pISSN - 2010-1368
DOI - 10.1142/s2010135x19500413
Subject(s) - ferroelectricity , materials science , doping , dielectric , photoluminescence , ceramic , analytical chemistry (journal) , coercivity , phase boundary , condensed matter physics , phase (matter) , optoelectronics , physics , composite material , chemistry , organic chemistry
Solid solutions of the lead-free 0.88([Formula: see text][Formula: see text]TiO 3 -0.12([Formula: see text][Formula: see text]TiO 3 (NBT-BT: [Formula: see text]Sm) ferroelectric ceramics were synthesized by solid state reaction. The doping of Sm promotes the structure of the ceramics to transform toward morphotropic phase boundary, and it decreases the grain size of the ceramics. With the increase of Sm content, the ferroelectric properties are improved gradually, where the ferroelectric polarization increases and the coercive field decreases. Sm doping induces a dielectric anomaly with obvious frequency dispersion at a low temperature, exhibiting the transition from the ferroelectric to relaxor state. Moreover, the photoluminescence spectra of NBT-BT:[Formula: see text]Sm ceramics exhibit a strong orange emission upon blue light excitation of the 400[Formula: see text]nm to 500[Formula: see text]nm. The emission intensities are strongly dependent on the Sm doping concentration, which reached the optimal value as the doping concentration is 0.7%. These results suggest that the NBT-BT:[Formula: see text]Sm ceramics may have significant technological promise in novel multifunctional devices.