Properties of Aluminum Nitride Ceramics

Properties of Aluminum Nitride Ceramics
Item	Unit	Typical Values
Physical Properties
Color	White Grey
Density	g/cm3	3.3-3.4
Chemical Formula	/	AlN
Gas permeability	0
Water Absorption	0
Mechanical Properties
Moh’s Hardness		5
Vickers hardness	Gpa	11
Fracture Toughness KIC	MPa•m1/2	2.6
Flexural Strength	Mpa	466-496
Compressive Strength	Mpa(lb/in2x103)	2100
Modulus of Elasticity(25°C)	Gpa	320
Thermal Properties
Thermal Conductivity	W/m·K	170-186
Thermal Expansion Coefficient	10-6/ºC	3.2-3.4
Thermal Shock Resistance	△T (ºC)	400
Specific Heat(25°C)	J/kg.K	720
Maximum Use Temperature	°C	1000
Electronic Properties
Dielectric Strength	KV/mm	17-19
Dielectric Constant	Er	8.8
Dielectric Loss Angle	1 MHz (×10-3)	0.3
Volume Resistivity(400~600ºC)	Ω.cm	2.75*1014