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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 |
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| Cite this article: |
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JIANG Yan-Ping, TANG Xin-Gui, LIU Qiu-Xiang et al 2008 Chin. Phys. Lett. 25 3044-3047 |
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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.
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| Keywords:
77.70.+a
77.84.-s
77.22.Ej
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Received: 29 April 2008
Published: 25 July 2008
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| PACS: |
77.70.+a
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(Pyroelectric and electrocaloric effects)
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77.84.-s
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(Dielectric, piezoelectric, ferroelectric, and antiferroelectric materials)
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77.22.Ej
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(Polarization and depolarization)
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