TY - JOUR
T1 - Photoluminescence and temperature dependent electrical properties of er-doped 0.94 Bi 0.5 Na 0.5 TiO 3-0.06 BaTiO 3 ceramics
AU - Hu, Bin
AU - Pan, Zhao
AU - Dai, Ming
AU - Guo, Fei Fei
AU - Ning, Huanpo
AU - Gu, Zheng Bin
AU - Chen, Jun
AU - Lu, Ming Hui
AU - Zhang, Shan Tao
AU - Yang, Bin
AU - Cao, Wenwu
N1 - Publisher Copyright:
© 2014 The American Ceramic Society.
PY - 2014/12
Y1 - 2014/12
N2 - Er-doped 0.94Bi0.5Na0.5TiO3-0.06BaTiO3 (BNT-6BT: xEr, x is the molar ratio of Er3+ doping) lead-free piezoceramics with x = 0-0.02 were prepared and their multifunctional properties have been comprehensively investigated. Our results show that Er-doping has significant effects on morphology of grain, photoluminescence, dielectric, and ferroelectric properties of the ceramics. At room temperature, the green (550 nm) and red (670 nm) emissions are enhanced by Er-doping, reaching the strongest emission intensity when x = 0.0075. The complex and composition-dependent effects of electric poling on photoluminescence also have been measured. As for electrical properties, on the one hand, Er-doping tends to flatten the dielectric constant-temperature (εr-T) curves, leading to temperature-insensitive dielectric constant in a wide temperature range (50°C-300°C). On the other hand, Er-doping significantly decreases the ferroelectric-relaxor transition temperature (TF-R) and depolarization temperature (Td), with the TF-R decreasing from 76°C to 42°C for x = 0-0.02. As a result, significant composition-dependent electrical features were found in ferroelectric and piezoelectric properties at room temperature. In general, piezoelectric and ferroelectric properties tend to become weaker, as confirmed by the composition-dependent piezoelectric coefficient (d33), planar coupling factor (kp), and the shape of polarization-electric field (P-E), current-electric field (J-E), bipolar/unipolar strain-electric field (S-E) curves. Furthermore, to understand the relationship between the TF-R/Td and the electrical properties, the composition of x = 0.0075 has been intensively studied. Our results indicate that the BNT-6BT: xEr with appropriate Er-doping may be a promising multifunctional material with integrated photoluminescence and electrical properties for practical applications.
AB - Er-doped 0.94Bi0.5Na0.5TiO3-0.06BaTiO3 (BNT-6BT: xEr, x is the molar ratio of Er3+ doping) lead-free piezoceramics with x = 0-0.02 were prepared and their multifunctional properties have been comprehensively investigated. Our results show that Er-doping has significant effects on morphology of grain, photoluminescence, dielectric, and ferroelectric properties of the ceramics. At room temperature, the green (550 nm) and red (670 nm) emissions are enhanced by Er-doping, reaching the strongest emission intensity when x = 0.0075. The complex and composition-dependent effects of electric poling on photoluminescence also have been measured. As for electrical properties, on the one hand, Er-doping tends to flatten the dielectric constant-temperature (εr-T) curves, leading to temperature-insensitive dielectric constant in a wide temperature range (50°C-300°C). On the other hand, Er-doping significantly decreases the ferroelectric-relaxor transition temperature (TF-R) and depolarization temperature (Td), with the TF-R decreasing from 76°C to 42°C for x = 0-0.02. As a result, significant composition-dependent electrical features were found in ferroelectric and piezoelectric properties at room temperature. In general, piezoelectric and ferroelectric properties tend to become weaker, as confirmed by the composition-dependent piezoelectric coefficient (d33), planar coupling factor (kp), and the shape of polarization-electric field (P-E), current-electric field (J-E), bipolar/unipolar strain-electric field (S-E) curves. Furthermore, to understand the relationship between the TF-R/Td and the electrical properties, the composition of x = 0.0075 has been intensively studied. Our results indicate that the BNT-6BT: xEr with appropriate Er-doping may be a promising multifunctional material with integrated photoluminescence and electrical properties for practical applications.
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U2 - 10.1111/jace.13217
DO - 10.1111/jace.13217
M3 - Article
AN - SCOPUS:84915823010
SN - 0002-7820
VL - 97
SP - 3877
EP - 3882
JO - Journal of the American Ceramic Society
JF - Journal of the American Ceramic Society
IS - 12
ER -