1Laboratory of Functional Inorganic Materials, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050
2Laboratory of Modern Acoustics, Institute of Acoustics, Nanjing University, Nanjing 210093
A New Noncontact Probe for Thermophysical Properties of Solid Surfaces
1Laboratory of Functional Inorganic Materials, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050
2Laboratory of Modern Acoustics, Institute of Acoustics, Nanjing University, Nanjing 210093
Abstract： Based on the photothermal displacement effect and the optical diffraction effect, an alternative pulsed photothermal technique has been developed. This technique overcomes some disadvantages of conventional methods and provides a sensitive, noncontact and nondestructive probe of the transient thermal and mechanical process at solid and thin film surfaces. Meanwhile, a three-dimensional theoretical model has also been presented to describe the experimental phenomena. Excellent agreement between the theory and the experiment is obtained. As an example, the technique is demonstrated by measuring the thermal diffusivity of aluminum and brass thin plates.
2000, Vol. 17 
