Chemical Composition
Item		Unit	AZS 33	AZS 36	AZS 41
Al2O3		%	Residue	Residue	Residue
ZrO2			32.0-36.0	35.0-40.0	40.0-44.0
SiO2	≤		16	14	13
Na2O			1.5	1.6	1.3
CaO+MgO+K2O+B2O3			0.7	0.6	0.9
Fe2O3+TiO2			0.3	0.3	0.3
Physical properties
Bulk density	≥	g/cm3	3.7	3.75	3.9
Apparent porosity	≤	%	2	1.5	1.3
Stactic Corrosion of Molten glass (soda-lime glass, 1500oC*36h)	≤	Mm/24h	1.6	1.5	1.3
Exudating Temp.	≥	oC	1400	1400	1400
Blister rate (soda-lime glass, 1300oC*10h)	≤	%	2	1.5	1
Glass Exudation  (Volume %) (1500oC*4h)		%	providing  actual tested data
Thermal expansion ratio(1000oC)		%	providing  actual tested data
Unit Volume  Min.    >	PT,QX	g/cm3	3.4	3.45	3.55
	ZWS	g/cm3	3.55	3.7	3.8
	WS	g/cm3	3.65	3.75	3.85