RESEARCHING OF GLASS FORMATION IN THE SODIUM-CALCIUM SILICATE COMPOSITIONS DURING HEAT TREATMENT
The paper presents the results of mixtures of silica and sodium and calcium compounds thermal behavior up to 1000ºС for the purpose of low-temperature glass synthesis. The temperature ranges of sodium compounds decomposition stages are found and showed that silicate formation independent on the crystalline state of silica. The formation of silicates in all cases proceeds according nonstoichiometric type below 820oC and can be done without technological step of the melt formation. The resulting lowtemperature glass can be used as a raw for the manufacture of foam glass.