Coefficient of thermal expansion

CORDIERITE	LOW HIGH	<0.2(22-23℃）	Good thermal expansion Excellent thermal shock resistance
SILICON NITRIDE		2.4-3.2	High toughness Thermal shock resistant Tight tolerances
SILICON CARBIDE		3.7-4.4	Hardness Mechanical strength Variable electrical resistivity Distinct properties that can be tailored
ALUMINIUM NITRIDE		4.6	Thermally stable Electrical resistivity
ALUMINA		7.3	General use Wear resistance Electrical insulator Dielectric strength Low dielectric loss
STEATITE		7.7-10	Good dielectric strength Low dielectric loss
ZIRCONIA		11	Toughness Mechanical Strength High Heat Resistance Corrosion Resistance