Related Experiment Video
Updated: Jul 14, 2026
The Frequency Domain Thermoreflectance Technique for Thermal Property Measurements
Published on: December 5, 2025
On the accurate determination of thermal diffusivity of liquids by using the photopyroelectric thickness scanning
S Delenclos1, D Dadarlat, N Houriez
1Laboratoire de Thermophysique de la Matière Condensée, Université du Littoral Côte d'Opale, équipe de l'UMR CNRS 8024, 59140 Dunkerque, France.
Abstract:
An enhanced accurate method of measuring the thermal diffusivity of liquids by the sample's thickness scan of the phase of the photopyroelectric signal is presented. The method, making use of the absolute values of the phase and sample thickness, leads to very accurate results for the room temperature values of thermal diffusivity (about +/-0.3%). The high accuracy of the method is due to a very precise control of the sample's thickness variation (0.1 microm step), to a proper localization of the thickness scan range, and to a new procedure of data analysis. The high accuracy of the method recommends it for the study of processes associated with small changes of the thermal parameters.
