Abstract

Thermoelastic properties of materials at high temperature, is directly related to thermal pressure and volume expansion of the materials. In the present work we have made a comparative study of temperature dependence of thermal pressure for geophysical minerals MgO and Al2O3 by using Suzuki formulation and Maxwell's formulation. It is observe that ΔPTh calculated by using Suzuki formulation is in good agreement with the experimental values up to 800K, but after this limit there is deviation from experimental values, whereas, in case of Maxwell's formulation the agreement is valid only upto T=300K. This depart in the agreement has been interpreted using Hardy's Theory.

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