Ab initio study of thermophysical properties of β-PbO2 under high temperature and pressure
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作者:
Farida Bounab
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机构:Université de M’sila,Laboratoire des Matériaux Inorganiques
Farida Bounab
Nacer-Eddine Chelali
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机构:Université de M’sila,Laboratoire des Matériaux Inorganiques
Nacer-Eddine Chelali
Abdallah Merrouche
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机构:Université de M’sila,Laboratoire des Matériaux Inorganiques
Abdallah Merrouche
Loubna Salik
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机构:Université de M’sila,Laboratoire des Matériaux Inorganiques
Loubna Salik
Nadir Bouarissa
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机构:Université de M’sila,Laboratoire des Matériaux Inorganiques
Nadir Bouarissa
Salah Daoud
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机构:Université de M’sila,Laboratoire des Matériaux Inorganiques
Salah Daoud
机构:
[1] Université de M’sila,Laboratoire des Matériaux Inorganiques
[2] Université Mohamed Elbachir El Ibrahimi de Bordj Bou Arreridj,Laboratoire Matériaux et Systèmes Electroniques (LMSE), Faculté des Sciences et de La Technologie
[3] University of M’sila,Laboratory of Materials Physics and Its Applications
Thermophysical properties;
Quasi-harmonic Debye model;
Lead dioxide;
High temperature;
Pressure effect;
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摘要:
We report a theoretical investigation on the finite temperature thermophysical properties of tetragonal lead dioxide (β-PbO2) material using ab initio calculations in the framework of the density functional theory within the generalized gradient approximation. The thermophysical properties for temperatures up to 600 K are determined and analyzed in detail using the quasi-harmonic Debye model. Experimentally, the β-PbO2 transforms to α-PbO2 at around 1 GPa. For that, the maximum value of pressure considered here is taken to be 1 GPa. Our findings show that the thermophysical properties of interest vary monotonically with both temperature and pressure which is consistent with previous studies of semiconducting materials. At zero pressure and temperature of 300 K, the isothermal bulk modulus and the Debye temperature are found to be around 113 GPa and 370.5 K, respectively.
机构:
Bhabha Atom Res Ctr, Appl Phys Div, Mumbai 400085, Maharashtra, IndiaBhabha Atom Res Ctr, Appl Phys Div, Mumbai 400085, Maharashtra, India
Sahoo, B. D.
Joshi, K. D.
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机构:
Bhabha Atom Res Ctr, Appl Phys Div, Mumbai 400085, Maharashtra, India
Homi Bhabha Natl Inst, Mumbai 400094, Maharashtra, IndiaBhabha Atom Res Ctr, Appl Phys Div, Mumbai 400085, Maharashtra, India