Abstract This article presents a measurement method of the apparent thermal conductivities of anisotropic insulating materials at high temperature by the parallel hot-wire method. In the proposed variant, the temperature is measured simultaneously at two points located on the main axes of anisotropy of the material to be characterized. A comprehensive model taking into account the anisotropy, the thermal capacity of the heating wire and the contact resistance was developed. A method for the estimation of the thermal properties was devised after carrying out a theoretical study of the reduced sensitivities of the temperatures to the different unknown parameters. An experimental study carried out up to 1000 °C on an anisotropic rigid insulating material confirmed that the thermal conductivities and the volumetric heat capacity of a rigid insulating material could be estimated by the proposed method with an accuracy of approximately 10%.

中文翻译：

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高温下各向异性绝缘材料表观热导率的平行热线法测量

摘要 本文提出了一种用平行热线法测量各向异性绝缘材料在高温下的表观热导率的方法。在所提出的变体中，在位于待表征材料的各向异性主轴上的两个点处同时测量温度。开发了一个综合模型，考虑了各向异性、加热丝的热容量和接触电阻。在对温度对不同未知参数的敏感性降低进行理论研究后，设计了一种估算热性能的方法。