一定温度范围内、温度每升高1℃时介电常数的相对平均变化率。表达式为：(式中，αε为介电常数的温度系数，℃-1；ε为介电常数，F/m ；Δε为温度升高后介电常数的变化量；Δt为温度的升高值，℃)。
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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.
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