介电常数和热释电系数两者都随温度降低而下降，无反常变化。
Both of the dielectric constant and pyroelectric coefficient decrease with decreasing temperature, no anomalies being observed.
研究了它们的介电常数，热电系数，厚度伸缩振动机电耦合系数及其温度依赖性。
The dielectric constant, pyroelectric coefficient, thickness extension vibration electromechanical coupling factor and their temperature dependence are investigated.
随着烧结条件的不同，介电常数几乎不变，但介电损耗以及介电常数的温度系数则较为敏感。
The dielectric constant was almost a constant, while the dielectric loss and temperature coefficient of dielectric constant were sensitive to the sintering conditions.
随着测试频率的增加，测得的材料介电常数略有下降，而居里温度与温度系数基本维持不变。
Moreover, with the increase of the working frequency, the dielectric constants of the PST materials decreased, but the Curie temperature and temperature coefficient basically had no variation.
测量了各种成分样品的介电常数随温度变化曲线以及纵向、横向电致伸缩系数Q_（11）、Q_（12）。
The dielectric constants varied with temperature and electrostrictive coefficients Q_11, Q_12 have been measured.
测量了各种成分样品的介电常数随温度变化曲线以及纵向、横向电致伸缩系数Q_（11）、Q_（12）。
The dielectric constants varied with temperature and electrostrictive coefficients Q_11, Q_12 have been measured.
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