Dielectric and Pyroelectric Properties of (Pb0.50Sr0.50)TiO3 Ceramics
Dielectric and Pyroelectric Properties of (Pb0.50Sr0.50)TiO3 Ceramics
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DOI：
10.1088/0256-307x/25/8/083
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发表时间：
2008-08
影响因子：
3.5
通讯作者：
Yan-ping Jiang;Xin-gui Tang;Qiu-Xiang Liu;Yi-Chun Zhou;Chan-Wong Lai-Wa
中科院分区：
文献类型：
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作者：
Yan-ping Jiang;Xin-gui Tang;Qiu-Xiang Liu;Yi-Chun Zhou;Chan-Wong Lai-Wa
钛酸铅锶（Pb0.50Sr0.50）TiO3（PST）陶瓷是采用传统陶瓷加工工艺制备而成。在25°C至300°C的温度范围内研究了介电常数和介电损耗。未极化和极化样品的最大介电常数分别为 9924 和 9683。观察到未极化和极化样品的相变温度分别为 153°C 和 157°C。未极化和极化样品的相变温度不相等，这是由域的极化状态造成的。极化电场 (P – E) 磁滞回线的剩余极化和矫顽电场分别为 18μC/cm2 和 6kV/cm。 PST 陶瓷热电系数的温度依赖性是通过动态技术测量的。极化PST陶瓷的介电常数和损耗tanδ分别为813和0.010。在室温25°C、频率100Hz下，热电系数和品质因数分别为294μC/cm2K和13.6×10-6 Pa-0.5。
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 × 10-6 Pa-0.5, respectively, at room temperature 25°C and frequency 100Hz.