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首页> 外文期刊>Thermochimica Acta: An International Journal Concerned with the Broader Aspects of Thermochemistry and Its Applications to Chemical Problems >CHARACTER OF THE PHASE TRANSITION IN LIQUID CRYSTALS BY AC CALORIMETRY
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CHARACTER OF THE PHASE TRANSITION IN LIQUID CRYSTALS BY AC CALORIMETRY

机译：交流量热法测定液晶中的相变特征

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摘要

A method based on the analysis of the temperature sensor of a high-resolution AC calorimeter has been developed in order to determine the character of the phase transition in liquid crystals. A comparative study between this method, denoted as 'thermistor method', and the standard phase shift procedure is carried out in different kind of liquid crystal phase transitions. The sensitivity of the standard phase shift method has been studied through the thermal models for our system. Finally, the method, when it is applied to first-order transitions, provides additional thermal features as coexistence region, metastability and latent heat ratio between transitions, and it could allow to elucidate the assignment of the character of the transition lines in phase diagrams. (C) 1997 Elsevier Science B.V. [References: 33]
机译：为了确定液晶中的相变特性，已经开发了一种基于高分辨率交流热量计的温度传感器的分析方法。在不同类型的液晶相变中，对这种方法（称为“热敏电阻器方法”）和标准相移程序进行了比较研究。通过我们系统的热模型已经研究了标准相移方法的灵敏度。最后，该方法应用于一阶跃迁时，可提供其他热特征，如共存区域，跃迁之间的亚稳定性和潜热比，并且可以在相图中阐明跃迁线的特性分配。 （C）1997 Elsevier Science B.V. [参考：33]

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