Abstract
This article is a review of new possibilities offered by two photothermal (PT) methods, a contact (photopyroelectric (PPE) calorimetry) and a non-contact one (photothermal radiometry (PTR)) for accurate measurements of dynamic thermal parameters (thermal diffusivity and effusivity) of condensed matter samples. Among a large variety of detection configurations, we selected in the article a recent proposed one, allowing for coupled PPE–PTR experiments. The detection cell of such a configuration is composed by a directly irradiated pyroelectric sensor, a liquid layer (coupling fluid) and a solid/liquid backing material. The measurements are based on the thickness scanning procedure of the coupling fluid (TWRC technique). Some recent applications concerning measurements of thermal diffusivity and effusivity of some liquids and solids (thin layers or bulk materials) together with a study of the accuracy of the investigations are described.
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