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, sa.4, 2014 (ESCI) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 5 Sayı: 4
  • Basım Tarihi: 2014
  • Doi Numarası: 10.1007/s13319-014-0028-1
  • Dergi Adı: 3D RESEARCH
  • Derginin Tarandığı İndeksler: Emerging Sources Citation Index (ESCI), Scopus
  • Anahtar Kelimeler: Piezoelectricity, Thermodynamic quantities, Pippard relations, beta-Quartz, beta-Cristobalite, PHASE-TRANSITION, INCOMMENSURATE PHASE, ELASTIC PROPERTIES, HEAT-CAPACITY, SCATTERING, SHIFT, ORDER
  • Orta Doğu Teknik Üniversitesi Adresli: Evet

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.