Investigations of Thermal Properties of Glass-Crystalline Samples from CMAS System by the Nondestructive Photoacoustic Method

摘要

The goal of investigations presented in this paper was to change the microstructure of a glass-crystalline material in order to improve its thermal diffusivity. Thermal diffusivity is an important thermo-physical parameter, which determinates the diffusion of heat through a sample. The paper presents results of nondestructive photoacoustic (PA) studies of this parameter for investigated ceramic material. The thermal diffusivity values are evaluated by the fitting of amplitude and phase theoretical characteristics to experimental data in a proposed PA model. The analysis of the data shows that the change of the microstructure of a glass-crystalline material successfully changes the thermal parameters of investigated ceramic material.