ABSTRACT Based on the Devonshire theory, a ratio of two thermodynamic parameters, a polarization – temperature coefficient, is found as the crucial for pyroelectric and dielectric tunability effects. Smaller ratio corresponds to larger degree of shift of dielectric peak and larger E-induced polarization. The materials will have higher temperature-stable dielectric tunability suitable for microwave devices. Larger ratio corresponds to larger change of electric hysteresis loop in shape and size with decreasing temperature from the Curie point. The materials will have larger pyroelectric coefficient. An experimental law that pyroelectric coefficient over square root of dielectric constant is a constant is derived.

中文翻译：

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电场诱导极化对介电可调性和热电系数的影响

摘要 基于德文郡理论，发现两个热力学参数的比率，即极化 - 温度系数，是热释电和介电可调性效应的关键。较小的比率对应于较大程度的介电峰位移和较大的 E 诱导极化。该材料将具有适用于微波设备的更高的温度稳定性介电可调性。较大的比率对应于随着温度从居里点降低，电滞回线在形状和尺寸上的较大变化。材料将具有较大的热电系数。推导出介电常数平方根上的热电系数为常数的实验规律。