TRANSITION METAL SILICIDES AND TELLURIDES - CRYSTAL STRUCTURE, HEAT CAPACITIES, AND DERIVED THERMODYNAMIC PROPERTIES FROM ABSOLUTE ZERO TO 2200 K

摘要

The harsh conditions of temperature, pressure, and atmosphere experienced in much of today's technology have fostered the development and detailed study of materials that can with stand these environments and function effectively. The transition metal silicides are stable to high temperatures, retain high tensile strength to these temperatures, resist oxidation, and have low electrical resistivity. They find use as refractory materials, as furnace elements, in high temperature aerospace work, and in interconnect technologies. The transition metal chalcogenides, which also are stable to high temperatures, are layered 2-dimensional solids. As a consequence they exhibit facile cleavage and have highly anisotropic physical properties. They find use as semiconductors, battery components, catalysts, and as solid lubricants at high temperatures. We report here on three materials on which we have made adiabatic calorimetric measurements of heat capacities: tungsten ditelluride WTe2, tungsten disilicide WSi2.06, molybdenum disilicide, MoSi2.067. [References: 21]