FUSION-CAST BRICK HAVING HIGH CONTENT OF ZIRCONIUM DIOXIDE Russian patent published in 2012 - IPC C04B35/484 

FIELD: chemistry.

SUBSTANCE: present invention relates to a fusion-cast brick having high content of zirconium dioxide, which can be used as a refractory lining of a glass-melting furnace in contact with molten glass mass. The refractory brick contains (wt %): zirconium dioxide (ZrO₂+Hf₂O) more than 85, silicon oxide 1-10, aluminium oxide 0.1-2.5 and dopants, wherein standard deviation σ of local content of zirconium dioxide divided by the volume of the brick is less than 7.5. Standard deviation σ of local content of zirconium dioxide is estimated using several samples selected randomly or in positions distributed within the brick.

EFFECT: longer service life of the refractory brick owing to uniform wear of the surface in contact with molten glass.

15 cl, 3 tbl, 3 dwg