Today, magnesia ceramics have attracted considerable attention due to their essential properties. Therefore, this paper investigates the impact of temperature (T) and pressure (P) on the thermal manner of magnesia ceramics using molecular dynamics simulations (MDS). As the T increases, the mobility of the structures increases. Therefore, the heat flux (HF) in the structures increments slightly due to the greater movement and the larger oscillation amplitude of the atomic samples. On the other hand, with increasing P, the oscillation amplitude and displacement of atomic samples are limited. Therefore, the thermal properties of the structure are expected to decrease. Studies show that increasing T from 250 to 350 K increases the average HF from 0.73 to 0.89 W/m2. Also, the average thermal conductivity (TC) increases from 30.58 to 38.27 W/mK. So, increasing the T means a certain amount of energy is fluxed in a shorter time. On the other hand, increasing the P from 0 to 5 bar decreases the average HF from 0.82 to 0.65 W/m2. Also, this issue leads to a decrease in the average TC from 33.49 to 30.96 W/mK.
Keywords: Ceramics; Magnesia; Molecular Dynamics simulations; Thermal behavior.
© 2022. The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.