摘要
The 0.93(Na_(0.5)Bi_(0.5))_(1–x)Sm_(x)TiO_(3)-0.07BaTiO_(3) multifunctional ceramics were prepared by solid-phase reaction method.The phase structure,microstructure,electrical and photoluminescent properties were systematically studied.With increasing x,the ceramics undergoes the phase transition from rhombohedral to tetragonal with some rhombohedral distortion,along with a reduced grain size and increased relative density.On the other hand,the Sm^(3+)doping enhances the electric-field driven reversible phase transition and domain size,and reduces the domain walls,thereby contributing to improved piezoelectricity and decreased depolarization temperature(T_(d))from 91℃ to 40℃.Excellent piezoelectric properties of d_(33)=213 pC/N and kp=29.9% are achieved in the x=0.010 ceramic.Under excitation(407 nm),the Sm^(3+)-doped ceramic exhibits bright reddish-orange fluorescence at 564,599,646 nm and 710 nm.A polarization-induced enhancement of photoluminescence is obtained in BNBT-_(x)Sm ceramics with an improved relative intensity of emission band at 646 nm.These results indicate that Sm^(3+)-doped BNBT ceramics show great potential in electro-optic integration and coupling device applications.
基金
This work was supported by Natural Science Foundation of Guangxi,China(2022GXNSFBA035612,ZY22096009,AD21075033)
Guangdong Basic and Applied Basic Research Foundation(2020A1515111004)
Guangdong Provincial Key Laboratory of Materials and Technologies for Energy Conversion(Grant No.MATEC2022KF002)
Natural Science Foundation of China(Grant No.51872180)
Foundation for Guangxi Bagui scholars.
作者简介
Shuai Cheng is now a postdoctoral fellow at Shanghai University. He obtained his bachelor degree in Materials Physics from the Shaanxi University of Science and Technology in 2012. He obtained his master degree in Materials Physics and Chemistry from Kunming University of Science and Technology in 2015. He obtained his Ph.D. at University of Science & Technology Beijing in 2019. His research interests focus on the preparation and performance of lead-free ferroelectric ceramics,contributed equally to this work;Kehong Zhang,contributed equally to this work;Corresponding author:Jianguo Chen received his Ph.D. degree in electronic material and device from Shanghai University China, in 2010. He was invited as a Postdoctoral Fellow with Peking University, Beijing, China, from 2011 to 2012. He is currently a full professor in the School of Materials Science and Engineering, Shanghai University. He is researching and fabricating Bi(Me)O_(3) based ceramics, and designing and fabricating high temperature sensors and actuators. His current research interests include high-temperature piezoelectric ceramics and multiferroic material for sensor and actuator applications,E-mail addresses:kpfocus@shu.edu.cn;Corresponding author:Boping Zhang obtained her B.A. at Huazhong University of Science and Technology in 1984. She also received her M.D. and Ph.D. at Tohoku University in 1990 and 1993, respectively. She has been a researcher of Tohoku University and the Northeast Institute of industrial technology of Japan, respectively. Now she works as a professor in University of Science & Technology Beijing since 2003. Her research interests mainly focus on lead-free piezoelectric ceramics, dielectric/piezoelectric ceramics, thermoelectric materials and thermoelectric devices,E-mail addresses:bpzhang@ustb.edu.cn;Corresponding author:Guanghui Rao,E-mail addresses:rgh@guet.edu.cn;Corresponding author:Siqi Shi,E-mail addresses:sqshi@shu.edu.cn。
