FIELD: chemistry.
SUBSTANCE: invention relates to refractory articles and can be used particularly in making containers for producing aluminium through electrolysis. The sintered refractory block based on silicon carbide (SiC) with silicon nitride binder (Si3N4) in mass ratio Si3N4/SiC equal to 0.05-0.45 contains 0.05-1.5 wt % boron. Boron is added to the raw mixture in form of an oxide, carbide, nitride, fluoride or alloy with a metal, preferably in form of B4C or CaB6. When realising the method, a load which contains silicon carbide and a boron compound is moulded, dried in air and roasted at 1100-1700°C in a nitrogen atmosphere.
EFFECT: higher corrosion resistance relative products which contain fluorine and molten cryolite.
27 cl, 1 tbl, 2 dwg
