Chemical Stability of Materials Based on Fused Mineral Raw Material in Uzbekistan

Resumo

The chemical stability and change in composition and structure of materials based on fused minerals and sodium liquid glass in the presence of interaction with corrosive liquids were studied. IR spectroscopy and chemical analysis showed that under the action of acids the degree of polymerization of silicate compositions increases as the decrease of the modifier cation content. The action of an alkaline solution is to shift the stretching vibrational bands of the Si–O–Si bonds into the low-frequency region as a result of a reduction of the SiO₂ content. All studied materials are stable in water and 3% CH₃COOH. The materials showing the highest stability in 20% H₂SO₄and 35% NaOH solutions are pyroxene-based.