STEADY-STATE TEST METHOD FOR HEAT-CONDUCTING PROPERTY IN THE DIRECTION ALONG PLANE OF SHEET MATERIAL

• Main Authors: HOU, Dexin, YE, Shuliang
• Format: Patent
• Language: English; French; German
• Published: 13.11.2019
• Subjects: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MEASURING; PHYSICS; TESTING

The present invention discloses a steady-state test method for in-plane heat-conducting performance of a sheet test sample. In the present invention, the sheet sample is locally heated until a thermal equilibrium state is reached, and then a thermal conductivity is calculated according to a result of integration performed for a temperature gradient on a heat transfer section. The present invention is characterized in that heat flow is not required to be uniform, a test may be performed based on an extremely small region of the sheet sample, surface heat loss power is relatively small, and an influence of surface heat dissipation on test accuracy of the thermal conductivity is reduced. Meanwhile, the method is characterized by an apparent thermal conductivity within a small range of a sheet. Therefore, quantitative evaluation for spatial distribution of thermal conductivities of a non-uniform sheet can be obtained by changing the test region. Based on the same idea, the method is also applicable to a sheet material oriented to thermal anisotropy after being slightly modified.