Dielectric and Pyroelectric Properties of (Pb0.50Sr0.50)TiO3 Ceramics
JIANG Yan-Ping1,2, TANG Xin-Gui1, LIU Qiu-Xiang1, ZHOU Yi-Chun2, CHAN-WONG Lai-Wa3
1School of Physics and Optoelectric Engineering, Guangdong University of Technology, Guangzhou Higher Education Mega Center, Guangzhou 5100062Key Lab of Low-Dimensional Materials and Application Technology (Ministry of Education), Xiangtan University, Xiangtan 4111053Department of Applied Physics and Materials Research Centre, Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong
Dielectric and Pyroelectric Properties of (Pb0.50Sr0.50)TiO3 Ceramics
JIANG Yan-Ping1,2, TANG Xin-Gui1, LIU Qiu-Xiang1, ZHOU Yi-Chun2, CHAN-WONG Lai-Wa3
1School of Physics and Optoelectric Engineering, Guangdong University of Technology, Guangzhou Higher Education Mega Center, Guangzhou 5100062Key Lab of Low-Dimensional Materials and Application Technology (Ministry of Education), Xiangtan University, Xiangtan 4111053Department of Applied Physics and Materials Research Centre, Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong
摘要Lead strontium titanate (Pb0.50Sr0.50)TiO3 (PST) ceramics are prepared by the traditional ceramic processing. The dielectric constants and dielectric loss have been investigated in a temperature range from 25°C to 300°C. The maximum dielectric constants for unpoled and poled samples are 9924 and 9683, respectively. The temperatures of phase transition for unpoled and poled samples are observed at 153°C and 157°C, respectively. The phase-transition temperatures for unpoled and poled samples are not equal, which results from the polarization state of the domains. The remnant polarization and the coercive electric field are 18μC/cm2 and 6kV/cm, respectively, from polarization-electric field (P-E) hysteresis loop. The temperature dependence of pyroelectric coefficients of the PST ceramics is measured by a dynamic technique. The dielectric constant and loss tan δ of the poled PST ceramics are 813 and 0.010, respectively. The pyroelectric coefficients and figure of merit are 294μC/cm2K and 13.6×10-6Pa-0.5, respectively, at room temperature 25°C and frequency 100Hz.
Abstract：Lead strontium titanate (Pb0.50Sr0.50)TiO3 (PST) ceramics are prepared by the traditional ceramic processing. The dielectric constants and dielectric loss have been investigated in a temperature range from 25°C to 300°C. The maximum dielectric constants for unpoled and poled samples are 9924 and 9683, respectively. The temperatures of phase transition for unpoled and poled samples are observed at 153°C and 157°C, respectively. The phase-transition temperatures for unpoled and poled samples are not equal, which results from the polarization state of the domains. The remnant polarization and the coercive electric field are 18μC/cm2 and 6kV/cm, respectively, from polarization-electric field (P-E) hysteresis loop. The temperature dependence of pyroelectric coefficients of the PST ceramics is measured by a dynamic technique. The dielectric constant and loss tan δ of the poled PST ceramics are 813 and 0.010, respectively. The pyroelectric coefficients and figure of merit are 294μC/cm2K and 13.6×10-6Pa-0.5, respectively, at room temperature 25°C and frequency 100Hz.
2008, Vol. 25 
