Physics – Condensed Matter – Materials Science
Scientific paper
1995-03-15
Physics
Condensed Matter
Materials Science
Geophys. Res. Lett., in press, 7 pages, 4 figures, uuencoded ps file
Scientific paper
Using the non-empirical Variational Induced Breathing (VIB) model, the thermal properties of periclase (MgO) under high pressures and temperatures are investigated using molecular dynamics, which includes all anharmonic effects. Equations of state for temperatures up to 3000K and pressures up to 310 GPa were calculated. Bulk modulus, thermal expansivity, Anderson-Gruneisen parameter, thermal pressure, Gruneisen parameter and their pressure and temperature dependencies are studied in order to better understand high pressure effects on thermal properties. The results agree very well with experiments and show that the thermal expansivity decreases with pressure up to about 100 GPa ($\eta$=0.73), and is almost pressure and temperature independent above this compression. It is also effected by anharmonicity at zero pressure and temperatures above 2500K. The thermal pressure changes very little with increasing pressures and temperatures, and the Gruneisen parameter is temperature independent and decreases slightly with pressure.
Cohen Richard E.
Inbar Iris
No associations
LandOfFree
High Pressure Effects on Thermal Properties of MgO does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with High Pressure Effects on Thermal Properties of MgO, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and High Pressure Effects on Thermal Properties of MgO will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-230902