Thermal Properties of Metals Using Electro-Pyroelectric Technique

In this work, we proposed a new method, based on photopyroelectric (PPE) principle in order to investigate simultaneously thermal conductivity and thermal diffusivity of materials. This technique consisted in heating electrically and uniformly the samples. The best coincidence between amplitude and phase curves of pyroelectric signal versus to square root modulation frequency and corresponding theoretical ones permitted thermal conductivity and thermal diffusivity values. This method is applied succevely on well-known materials such as aluminum, copper, iron, stainless steel and zinc. The obtained values are in good agreement with those found in literature, with ours uncertainties.