Determination of Thermal Diffusivity and Thermal Effusivity of the (Bi0.5Na0.5)0.935Ba0.065TiO3Ferroelectric Ceramics by Photothermal Techniques

In this work, the thermal diffusivity and thermal effusivity properties of the (Bi0.5Na0.5)0.935 Ba0.065TiO3 lead-free ferroelectric ceramics are studied since it can be use as pyroelectric detectors. Photoacoustic and photothermal techniques were used to determine thermal diffusivity and thermal effusivity respectively. The preparation of the ceramics was perform in our laboratory by using the oxide-mixing conventional method. The ceramics present high value of thermal diffusivity compared with barium Titanate. All measurements were made at room temperature.