Sintered Zirconia Corundum Bricks

Sintered zirconia corundum bricks have strong resistance to molten glass corrosion and high strength. In addition, due to the presence of partially stabilized tetragonal ZrO₂, micro-cracks are formed within the bricks, resulting in a small amount of porosity and superior thermal shock resistance compared to fused cast AZS bricks. They are mainly used in glass kilns, heating furnaces, etc.

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Physical and Chemical Indicators

Item	AZS16	AZS20	AZS32
ZrO₂ (%)	≥ 16	≥ 20	≥ 32
Al₂O₃ (%)	≥ 59	≥ 55	≥ 45
Fe₂O₃ (%)	≤ 0.5	≤ 0.5	≤ 0.5
Cold Crushing Strength (MPa)	≥ 70	≥ 80	≥ 90
Apparent Porosity (%)	≤ 20	≤ 18	≤ 17
Bulk Density (g/cm³)	≥ 3.0	≥ 3.1	≥ 3.2
Refractoriness Under Load (0.2MPa, ℃)	≥ 1620	≥ 1650	≥ 1680

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