Measurement of thermal conductivity and diffusivity - is obtained from recording of thermal shock effects on isolating materials

Abstract

Abstract Rapid measurements of thermal conductivity and thermal diffusion of isolating materials overcomes problems when long time periods are involved and enables measurements to be made during manufacture. A sample (16) is placed in a housing (10) onto a heat exchanging plate (12) which has a fluxmeter (14) in its upper surface. The plate is heated by an electrical generator (18) to produce a given level of heat on the sample. A second identical plate (20) is placed above the sample with its fluxmeter (22) on its lower surface and is connected to a second generator (24). A thermal shock is generated by applying the upper plate to the sample. Results are recorded on a two channel recorder (26) from which calculations are made.

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