Measurement of thermal diffusivity of polycrystalline diamond film by the converging thermal wave technique

Abstract

The in-plane thermal diffusivity of a polycrystalline diamond film has been measured to be 7.05 cm2/s with the converging thermal wave technique. This technique is shown to be simple, accurate, rapid to perform, and is independent of sample thickness and shape. Both high and low thermal diffusivity materials can be characterized with the technique.