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Abstract: Transient methods are often preferred to steady-state methods when testing the thermophysical properties of materials because of they are simple to use, can quickly produce measurements, and can simultaneously test three thermal properties. There are two factors that influence the accuracy of contact transient testing that must be accounted for when developing a standard: measurement time, and the geometry of the sample and the sensor. To demonstrate this point, when using the transient plane source method to measure the thermal conductivity of a sample of Pyroceram 9606 that was smaller than the recommended size, the results did not match with the certified value of the sample.  

Reference: International Journal of Thermophysics, 26, 6 (2005) 1917-1938

DOI: 10.1007/s10765-005-8605-4