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Room temperature screening of thermal conductivity by means of thermal transient measurements

García-Cañadas, Jorge, Cheng, Shudan, Márquez-García, Lourdes, Prest, Martin J., Akbari-Rahimabadi, Ahmad and Gao, Min ORCID: 2016. Room temperature screening of thermal conductivity by means of thermal transient measurements. Measurement Science and Technology 27 (10) , -. 10.1088/0957-0233/27/10/105602

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A proof of concept of the possibility to estimate thermal conductivity of bulk disc samples at room temperature by means of thermal decays is demonstrated. An experimental set-up was designed and fabricated, which is able to perform thermal transient measurements by using a specially designed multifunctional probe that has the ability to measure temperature at its tip. Initially, the probe is heated by a heater coil located in its interior until the tip temperature reaches a steady state. Then, the probe is contacted with a disc sample which produces a temperature decay until a new state is reached. The difference between the initial and final states temperatures shows a correlation with the thermal conductivity of the sample. Employing a calibration equation, obtained using reference materials, the thermal conductivity can be calculated. Reasonably good random and systematic errors (<13% and ~9% respectively) are obtained. Theoretical simulations performed using COMSOL show a good qualitative agreement with experimental results. This new method involves an inexpensive and simple set-up which can be especially useful for thermal conductivity screening and high-throughput measurements.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Engineering
Publisher: IOP Publishing
ISSN: 0957-0233
Date of Acceptance: 16 August 2016
Last Modified: 02 Nov 2022 09:57

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