The synthesis of an inorganic heat-insulating material - glass-foam ceramics with the use of activating methods for preparing a charge in the form of its extrusion and autoclaving is considered. The interaction of the amorphous phases of the opalcristobalite rock with NaOH intensifies, resulting in a significant decrease in the average density of the material. The economic effect is achieved due to a proportional reduction in the content of expensive sodium hydroxide in the material. The introduction of an additive for container cullet into the charge contributes to an even more significant decrease in the average density of samples and a reduction in the consumption of NaOH, and, consequently, to a reduction in the cost of foam glass ceramics.
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