FIELD: manufacture of refractory articles; manufactore of linings for heating furnaces, muffle furnaces for stomatology in particular, melting crucibles and shaped refractory articles.
SUBSTANCE: proposed burden contains the following components, mass-%: boron nitride, 25-55; synthetic corundum, 15-40; molten mullite, 10-15; alumina, 10-25; fire clay and kaoline, 5-15; rare-earth metal oxide from groups La2O3, Nd2O3 and Gd2O3, 0.5-5; alumo-containing compound, 0.1-5. Used as alumo-containing compound is aluminum hydroxide, aluminum chloride or aluminum carbonate.
EFFECT: enhanced chemical resistance to reaction-active melts; enhanced heat resistance and refractoriness in vacuum and in shielding atmospheres.
4 cl, 1 tbl
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