Thermal conductivity

ALUMINIUM NITRIDE	HIGH LOW	140	Thermally stable Electrical resistivity
SILICON CARBIDE		60	Hardness Mechanical strength Variable electrical resistivity Distinct properties that can be tailored
ALUMINA		30	General use Wear resistance Electrical insulator Dielectric strength Low dielectric loss
SILICON NITRIDE		25	High toughness Thermal shock resistant Tight tolerances
CORDIERITE		3	Good thermal expansion Excellent thermal shock resistance
ZIRCONIA		3	Toughness Mechanical Strength High Heat Resistance Corrosion Resistance
STEATITE		2	Good dielectric strength Low dielectric loss