table2

Properties	Units	Test	Value
	Physical
Chemical Formula	-	-	AIN
Density, r	g/cm3	ASTM C20	3.25
Color	-	-	white/tag/gray
Crystal Structure	-	-	hexagonal
Water Absorption	% @R.T.	ASTM C373	0
Hardness	Moh's	-	5
Hardness	knoop (kg/mm2)	Knoop 100g	1170
	Mechanical
Compressive Strength	MPa @ R.T.	ASTM C773	2068
Tensile Strength	MPa @ R.T.	ACMA Test #4	--
Modulus of Elasticity (Young's Mod.)	GPa	ASTM C848	308
Flexural Strength (MOR)	MPa @ R.T.	ASTM F417	428
Poisson's Ratio, u	-	ASTM C818	0.25
Fracture Toughness, KIc	MPa x m1/2	Notched Beam Test	3.5
	Thermal
Max. Use Temperature (* denotes inert atm.)	ºC	No load cond.	1600
Thermal Shock Resistance	DT (ºC)	Quenching	400
Thermal Conductivity	W/m-K @ R.T.	ASTM C408	170
Coefficient of Linear Thermal Expansion, al	mm/m-ºC (~25ºC through ±1000ºC)	ASTM C372	4.6-5.7
Specific Heat, cp	cal/g-ºC @ R.T.	ASTM C351	0.25
	Electrical
Dielectric Constant	1MHz @ R.T.	ASTM D150	8.0-9.1
Dielectric Strength	kV/mm	ASTM D116	15
Electrical Resistivity	Wcm @ R.T.	ASTM D1829	>1014