1H МҰЗ МОДИФИКАЦИЯСЫНЫҢ ЖОҒАРҒЫ ҚЫСЫМ МЕН ТӨМЕНГІ ТЕМПЕРАТУРАЛАРДАҒЫ СЕРПІМДІЛІК ЖӘНЕ ЖЫЛУЛЫҚ ҚАСИЕТТЕРІН ЗЕРТТЕУ

Abstract

In this article, for the first time, the pressure dependence of the relative volume of ice 1h modification was experimentally measured within the pressure range of 15-680 MPa at constant temperatures of 130 K and 170 K, along with the propagation of longitudinal and transverse waves in the medium. For isothermal processes, based on experimentally obtained physical parameters, known physical laws, and formulas, the pressure dependencies of the volumetric expansion coefficient of the studied sample, the Debye characteristic and reduced temperatures, and the specific heat capacity were calculated. During the research, the phase diagram of ice in P-T coordinates, which holds significant theoretical and practical importance, was used. The determination of the pressure dependence of the volumetric thermal expansion coefficient at various temperatures – which defines the mechanical and energetic properties of solids – was carried out by differentiating the experimentally obtained portion of the V(P)_t curve up to the first-order phase transition. The pressure-dependent deformation of the high-pressure chamber and pistons at all temperatures and pressures was taken into account during the analysis. The thermal volumetric increases of the camera parts were ignored due to their small size.