| abstract |
An amorphous refractory having excellent spalling characteristics, improved oxidation resistance and corrosion resistance, high thermal conductivity and high strength is provided. An refractory material comprising a refractory material composed of coarse grains, intermediate grains and fine grains, and alumina cement. The amorphous refractory contains 20 to 90% by mass of a composite material of silicon carbide and silicon nitride, and the composite material contains at least one selected from the group consisting of Al, Ca, Fe, Ti, Zr and Mg. Is contained in an amount of 0.1 to 8% by mass in terms of oxide. [Selection] Figure 1 |