CERTAIN PHYSICO-CHEMICAL PROPERTIES OF GLASS AND GLASS-CERAMICS OF Li₂O-CdO-SiO₂ SYSTEMS NUCLEATED WITH CaF₂

The area of the occurrence of glasses in the system Li₂O-CdO-SiO₂ nucleated with CaF₂ and the method of their preparation are determined. Detailed investigations were carried out for 4 glasses and glass-ceramics obtained from these glasses. The DTA method and the gradient furnace were used to determine the parameters of thermal treatment of the starting glasses. The specific electric resistance as a function of temperature, density, the microhardness and chemical durability on water action of the starting glasses and of glass-ceramics obtained from them were investigated. Using the method of X-ray diffraction the phase composition of the glass-ceramics was determined. The obtained glass-ceramics demonstrate very great microhardness, high electric resistance at elevated temperature and good chemical durability on water action.