The thermal conductivity λ b, thermal diffusivity α b of the thin black paint layer sprayed on solid surface and absorptivity α for laser beam are measured by applying a non-contact measurement method of the thermophysical properties of solids. The...
The thermal conductivity λ b, thermal diffusivity α b of the thin black paint layer sprayed on solid surface and absorptivity α for laser beam are measured by applying a non-contact measurement method of the thermophysical properties of solids. The values of α=0.67, λb =1.45 W/mK and αb=1.24×10-6 ㎡/s are obtained for the sprayed layer thickness zb=40㎛. Furthermore, for the zb=24㎛ thick layers which are formed by rubbing with a glass rod after spraying, the values of α=0.73, λb =1.85 W/mK and αb=1.09×10-6 ㎡/s are obtained. It is also shown that the present thermal diffusivity αb for zb=40㎛ is about 30~80% larger than those obtained by Araki et al for the thicker layer zb=150~248㎛. This method could be applied to the measurement of thermophysical properties of thin layer on solids.