High-accuracy method for testing thermal interface material
A technology of thermal interface material and testing method, which is applied in the field of testing, and can solve problems such as temperature measurement uncertainty error, difficult interface contact thermal resistance measurement accuracy, etc.
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[0051] The present invention proposes a symmetrical test structure using positive and negative bi-directional heat flow on the basis of the American national standard ASTM D5470, which can basically eliminate the occurrence of different contact conditions between the multiple temperature sensors arranged on the test heat flow meter and the test heat flow meter. Uncertainty errors in temperature measurement, combined with temperature-controllable thermal radiation shields and auxiliary heating measures to reduce heat flow loss, and using an optimized minimum test heat flow to ensure the one-dimensionality of the temperature gradient of the test material, to To achieve the purpose of testing the thermophysical parameters of the thermal flowmeter with high precision, the method can measure the contact thermal resistance performance and effective equivalent thermal conductivity of the thermal interface material with high precision.
[0052] The present invention will be described i...
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