A Procedure for determining the thermal diffusivity of materials

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Author	Search for: Stephenson, D. G.¹
Affiliation	National Research Council Canada
Format	Text, Article
Subject	Roofing; diffusivity; thermal conductivity; specific heat; heat transfer; granite; walls; roofs; thermal diffusivity; thermal conductivity; heat capacity; specific heat; granite; guarded hot plate apparatus; Insulation; Couvertures; diffusivité; conductivité thermique; chaleur massique; transfert de chaleur; mur; toiture
Abstract	The thermal diffusivity of a solid material can be determined using pairs of identical specimens prepared for a thermal conductivity determination in a Guarded Hot Plate apparatus (ASTM C-177). Specimens are placed one on top of the other with a temperature sensor between them, and the pair is placed between the heat-sink plates of a Guarded Hot Plate apparatus. The temperature of these plates is varied at a constant rate. The thermal conductivity, specific heat and density of the material are assumed to be constant over the range of temperature used for the test. For a pair of granite slabs, at a mean temperature of 8 degrees C, the thermal diffusivity is 8.49 x 10-7 m2/s + or - 0.02 x 10-7 m2/s.
Publication date	1987-04
In	Journal of Thermal Insulation 10 (April 1987): 236–242.
Language	English
Peer reviewed	Yes
Identifier	IRC-P-1480
NRC number	NRCC 28337 NRC-IRC-1766
NPARC number	20377619
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Record identifier	575a33e0-3064-4d42-a904-e05be08152e5
Record created	2012-07-24
Record modified	2020-06-06

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Date modified:: 2026-04-24