Scopus İndeksli Yayınlar Koleksiyonu
Permanent URI for this collectionhttps://hdl.handle.net/20.500.12416/8651
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Article Raman Wavenumbers Calculated as a Function of Pressure From the Mode Gruneisen Parameter of Pzt (X = 0.48) Ceramic Close To the Monoclinic-Cubic Transition(World Scientific Publ Co Pte Ltd, 2019) Kiraci, A.The isothermal mode Gruneisen parameter gamma(T)(P) of some Raman modes in PbZr1-xTixO3 (PZT, x = 0.48) were calculated as a function of pressure by means of the observed pressure-dependent volume data of PZT (x = 0.48) crystal from the literature at room temperature of 298 K. Those calculated values of gamma(T)(P) were then used to compute the pressure dependence of the Raman modes in PZT (x = 0.48) ceramic studied here. The observed and calculated values of the Raman wavenumbers in PZT were in good agreement, which indicates that the isothermal mode Gruneisen parameter can also be used to predict the pressure-dependent wavenumbers of some other perovskite-type crystals. Additionally, the pressure dependence of the thermodynamic quantities such as isothermal compressibility kappa(T), thermal expansion alpha(P) and the specific heat C-P - C-V of PZT (x = 0.48) ceramic were predicted at constant temperature of 298 K. Here, the experimentally measurable thermodynamic quantities calculated for PZT (x = 0.48) ceramics provide theoretically a significant opportunity for testing.Erratum Citation - WoS: 7Citation - Scopus: 7Retracted: a Simple Analytical Eam Model for Some Bcc Metals (Retracted Article. See Vol. 16, Pg. 4547, 2011)(Elsevier, 2010) Dursun, Ibrahim H.; Guvenc, Ziya B.; Kasap, E.An analytical embedded atom method which can treat bcc transition metal iron has been developed. In this model, a new potential was presented and a modified term has been introduced to fit the negative Cauchy pressure P-C = (C-12 - C-44)/2 for Fe element. The new model was applied to calculate thermodynamic properties of binary alloys of the bcc transition metals: Fe, V and Cr. The calculated dilute-solution enthalpies and formation enthalpies of random alloys are in good agreement with the results of first principles calculations and that of the thermodynamic calculations. (C) 2009 Elsevier B.V. All rights reserved.