Property	Unit	99.8% Alumina	99.5% Alumina	Zirconia	Quartz
Mechanical	Color	-	Ivory	Ivory/White	Ivory	white/transparent
	Density	g/cm3	3.9	3.8-3.9	5.79-6.05	2.2
	Water Absorption	%	0	0	0	0
	Flexural Strength	MPa@R.T.	400	310-379	900-980	80
	Compressive Strength	MPa@R.T.	3180	2070 - 2620	-	650-1100
	Hardness	Gpa	14.0-15.0	13.8-17.6	11.0-12.7	11.5-13.5
Thermal	Coefficient of Linear thermal Expansion	1E-6/ºC (>25ºC to  £1000ºC)	8.0	9.0-9.4	9.2-10.3	0.55
	Thermal Conductivity	W/mºK@R.T.	29.5	25.1-35.6	2.2-3.8	1.4
	Specific Heat	cal/gºC@R.T.	0.21	0.19-0.21	0.12	0.16
	Thermal Shock resistance	DT( ºC )	250	200	280-360	-
	Maximum Use temperature	ºC	1800	1600-1750	2400	1200
Electrical	Volume Resistivity	Wcm@R.T.	>1014	>1014	-	7 x 107
	Dielectic Constant	1Mhz@R.T.	9.8	9.6-10.2	-	3.75