ceramic specifications for alumina, steatitite, cordierite and zirconia

Property	Unit	60% Alumina	75% Alumina	90% Alumina	96% Alumina	99+% Alumina	Steatite	Cordierite	Zirconia
Density	g/cc	3	3.2	3.4	3.6	3.8	>2.6	2.3	6
Hardness	Mohs	7.5	7.5	7.5	8	8	7	6.5	8
Flexural Strength	kpsi	25	30	30-40	40-45	>45	15	9	>110
Compressive Strength	kpsi	65	70	250-300	280-300	>300	60	30	>300
Factor of Expansion	10^–6/⁰C	7.5	8	8	8	8	8	1.3	10
Dielectric Constant		6	6.1	8.1	9.2	9.7	5.5	5	12.3
Dielectric Strength	kV/mm	10	10	15	15	17	>9	13	17
Thermal Conductivity	W/m-k	2.5	12	18	23	24	2.5	2.5	3
Maximum Operating Temp.	⁰C	1100	1150	1500	1600	1700	1200	1100	2200

*The data offered here is for comparative purposes only, and is not to be construed as absolute engineering data.
Actual data may vary due to product configuration. The data does not represent a warranty for which we assume legal responsibility.