Fused Zirconia Corundum Brick (AZS)

Fused-cast AZS brick for glass tank furnaces, with high resistance to molten glass and low glass contamination, in grades AZS33Y, AZS36Y and AZS41Y with ordinary, quasi-void-free and void-free casting.

Grades / types: AZS33Y, AZS36Y, AZS41Y

Product overview

Fused zirconia corundum (AZS) brick is used mainly in glass industry tank furnaces. It has high resistance to molten glass attack and low contamination of the glass.

Three grades are specified, with bulk density values for ordinary or tilt casting, quasi-void-free casting and void-free casting.

Key characteristics

High resistance to molten glass attack
Low contamination of molten glass
Specified static corrosion rate, exudation and bubble precipitation
Ordinary, quasi-void-free and void-free casting

Technical data

Physical and chemical specification
Property	Unit	AZS33Y	AZS36Y	AZS41Y
ZrO₂	%	32~36	35~40	40~44
SiO₂	%	≤16	≤14	≤13
Na₂O	%	≤1.45	≤1.45	≤1.3
Fe₂O₃+TiO₂+CaO+MgO+K₂O+Na₂O	%	≤2.0	≤2.0	≤2.0
Fe₂O₃+TiO₂	%	≤0.3	≤0.3	≤0.3
Bulk Density	g/cm³	≥3.75	≥3.8	≥3.95
Apparent Porosity	%	≤1.5	≤1.0	≤1.0
Static Corrosion (1500℃×36h)	mm/24h	≤1.6	≤1.5	≤1.3
Exudation Temperature	℃	≥1400	≥1400	≥1400
Bubble Precipitation Rate (1300℃×10h)	%	≤2.0	≤1.5	≤1.0
Exudation Amount of Glass Phase (1500℃×4h)	%	≤2.0	≤3.0	≤3.0
Bulk Density (Ordinary / tilt casting)	kg/m³	≥3400	≥3450	≥3550
Bulk Density (Quasi-void-free casting)	kg/m³	≥3600	≥3700	≥3850
Bulk Density (Void-free casting)	kg/m³	≥3700	≥3750	≥3900