alpha-beta Transition in Quartz: Temperature and Pressure Dependence of the Thermodynamic Quantities for beta-Quartz and beta-Cristobalite as Piezoelectric Materials


Lider M. C. , YURTSEVEN H. H.

3D RESEARCH, cilt.5, 2014 (ESCI İndekslerine Giren Dergi) identifier identifier

Özet

Temperature and pressure dependencies of the thermal expansivity (alpha(p)), isothermal compressibility (j(T)) and the specific heat (C-p - C-v) are studied for piezoelectric materials, in particular, for beta-quartz. By analyzing the temperature (at 1 atm) and pressure (at 848 K) dependence of the observed volume V from the literature, the thermodynamic functions (ap, jT and C-p - C-v) are obtained and the Pippard relations (C-p - C-v vs. Vap and ap vs. j(T)) close to the transition from the beta-quartz to the beta-cristobalite are examined.