Method for measuring thermal conductivity

Abstract

A method for measuring thermal conductivity of a material contains the now described steps. A heat pulse is applied to a front side of the material. The resulting time-dependent two-dimensional temperature field of the front side of the material is detected using an infrared detector. An isotherm is identified in the temperature field. First and second thermal conductivities of the material in first and second directions of the material are calculated on the basis of the shape of the isotherm and on the basis of first and second temperatures detected at one point of the front side of the material at two points in time.

Description

Technical field [0001] The invention relates to a method for measuring the thermal conductivity of materials. Background technique [0002] The statements in this section only provide background information related to the present invention and may not constitute prior art. [0003] Thermal conductivity is the ability of a material to conduct heat. The measurement of thermal conductivity plays a major role in the analysis of materials in many different industries (such as the automotive industry, the chemical industry, the electronics industry, and construction). In the heat accumulator, for example, a material having high thermal conductivity can be used. However, thermal shielding requires low thermal conductivity. The statement of the prior art for measuring thermal conductivity is described by H. Czichos, T. Saito and L. Smith (Eds.) in "Handbook of Materials Measurement Methods", 2006, Springer, pp. 399-408. There are three basic methods that can be used to measure thermal ...

AI Technical Summary

Problems solved by technology

Furthermore, most of them require long measurement times and / or can only be performed in a laboratory environment rather than in an industrial environment

Often, these methods are optimal and constrained, respectively, for a particular class of material and / or temperature range

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