在相变温度区域里，介电、热电和压电都有明显的热滞效应，具有一级相变特性。

Near the transition temperature, a thermal hysteresis was found in dielectric, pyroelectric and piezoelectric measurements. Thus the transition should be of the first order transition.

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在相变温度区域里，介电、热电和压电都有明显的热滞效应，具有一级相变特性。

Near the transition temperature, a thermal hysteresis was found in dielectric, pyroelectric and piezoelectric measurements. Thus the transition should be of the first order transition.

youdao