REFRACTORY PRODUCT WITH HIGH CONTENT OF ZIRCONIUM DIOXIDE Russian patent published in 2013 - IPC C04B35/484 

FIELD: construction.

SUBSTANCE: product contains the following oxide-based components, wt %: SiO₂: from 3.5 to 6.0, Al₂O₃: from 0.7 to 1.5, Na₂O+K₂O: from 0.10 to 0.43, B₂O₃: from 0.05 to 0.80, CaO+SrO+MgO+ZnO: <0.4, P₂O₅: <0.05, Pe₂O₃+TiO₂: <0.55, other particles: <1.5%, ZrO₂+HfO₂: the balance up to 100%.The ratio of weight percentages Al₂O₃/(Ha₂O+K₂O) is greater than or equal to 3.5 and the ratio of weight percentages B₂O₃/(Na₂O+K₂O) ranges from 0.3 to 2.5.

EFFECT: obtaining a product with improved creep flow properties and resistance to temperature changes.

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