Photoacoustic analysis of the ferroelectric ceramics specific heat
Por:
Castañeda-Guzmán R., Villagrán-Muniz M., Saniger-Blesa J.M., Pérez-Ruiz S.J., Pérez-Martínez O.
Publicada:
1 ene 2000
Resumen:
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 (Cp) for ceramic materials. This analysis was applied to a BaTiO3 ferroelectric ceramic and a good agreement with previously published Cp versus temperature curves was obtained. Additionally, the phase transition temperature and the Cp curve of a samarium-doped lead titanate ceramic (Pb0.88Sm0.08TiO3) are presented. The phase transition temperature of the Pb0.88Sm0.08TiO3 obtained with this technique was corroborated with classical differential thermal analysis and dielectric permittivity measurements. © 2000 American Institute of Physics.
Filiaciones:
Castañeda-Guzmán R.:
Centro de Instrumentos, Univ. Nac. Auton. de México, A.P. 70-186, C.P. 04510 México, Mexico
Villagrán-Muniz M.:
Centro de Instrumentos, Univ. Nac. Auton. de México, A.P. 70-186, C.P. 04510 México, Mexico
Saniger-Blesa J.M.:
Centro de Instrumentos, Univ. Nac. Auton. de México, A.P. 70-186, C.P. 04510 México, Mexico
Pérez-Ruiz S.J.:
Centro de Instrumentos, Univ. Nac. Auton. de México, A.P. 70-186, C.P. 04510 México, Mexico
Pérez-Martínez O.:
Faculted de Física, Depto. Inst. Mat. Reactivos E., Universidud de la Habana, L. Vedado, La Huhana 10400, Cuba
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