Knowing the thermal expansion of a material and the correlation analysis of the photoacoustic signals, it is possible to obtain the phase transition temperature and a qualitative curve of the specific heat at constant pressure for ceramic materials. This analysis was applied to a ferroelectric ceramic and a good agreement with previously published versus temperature curves was obtained. Additionally, the phase transition temperature and the curve of a samarium-doped lead titanate ceramic are presented. The phase transition temperature of the obtained with this technique was corroborated with classical differential thermal analysis and dielectric permittivity measurements.
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