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http://dx.doi.org/10.9714/psac.2012.14.2.032

Specific Heat Measurement of Insulating Material using Heat Diffusion Method  

Choi, Yeon-Suk (Korea Basic Science Institute)
Kim, Dong-Lak (Korea Basic Science Institute)
Publication Information
Progress in Superconductivity and Cryogenics / v.14, no.2, 2012 , pp. 32-35 More about this Journal
Abstract
The objective of the present work is to develop a precise instrument for measuring the thermal property of insulating material over a temperature range from 30 K to near room temperature by utilizing a cryocooler. The instrument consists of two thermal links, a test sample, heat sink, heat source and vacuum vessel. The cold head of the cryocooler as a heat sink is thermally anchored to the thermal link and used to bring the apparatus to a desired temperature in a vacuum chamber. An electric heater as a heat source is placed in the middle of test sample for generating uniform heat flux. The entire apparatus is covered by thermal shields and wrapped in multi-layer insulation to minimize thermal radiation in a vacuum chamber. For a supplied heat flux the temperature distribution in the insulating material is measured in steady and transient state. The thermal conductivity of insulating material is measured from temperature difference for a given heat flux. In addition, the specific heat of insulating material is obtained by solving one-dimensional heat diffusion equation.
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