FIELD: process engineering.
SUBSTANCE: invention relates to metallurgy. Proposed mix comprises the following components in wt %: mix of oxides SiO2 and Al2O3 at weight ratio of 0.4:0.6 that corresponds to formation of compound with empirical formula Al2SiO5 - 65-75, ammonium dichromate (NH4)2Cr2O7 - 20, alkali-earth carbonates or hydrosilicates making the rest.
EFFECT: higher resistance to sintering and melting.
1 tbl, 5 ex
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