FIELD: chemistry.
SUBSTANCE: invention relates to a heat-resistant ceramic article for facing high-temperature ferrous and non-ferrous metallurgy assemblies, as well as mineral material kilns. The moulded fire-resistant ceramic article is made using an additive formed from a solidified melt and consisting of ≥95 wt % MgO and calcium zirconate, with MgO content between 45 wt % and 65 wt % and content of calcium zirconate between 35 wt % and 55 wt %. The moulded heat-resistant article with a MgO-based matrix contains said additive in amount of 3-30 wt %, and consists of more than 95 wt % periclase and calcium zirconate structural phases.
EFFECT: improved fracture mechanics properties of articles.
13 cl, 1 tbl, 1 dwg
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