Diffusivity measurement of thick samples by thermography and heating-cooling technique

The technique consisting in using a Peltier cell in contact with the material and producing successively heating and cooling conditions is presented for the measurement of diffusivity. Results on thermally thin materials with well known characteristics like stainless steel AISI 304 gives measurement values with precision around 10%. Analyzing the situation of a thermally thick marble sample, the in-depth propagation affects also the lateral ones. This is of general interest for a future use of this technique in the field where the thickness of the material may be important.