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Ferro-Ceramic Grinding Inc. machines over 15 different materials

Aluminum Nitride

Aluminum Nitride Properties
Aluminum Nitride Ceramic materials physical, mechanical, thermal and electrical properties reference chart.

Aluminum Nitride Properties

While AlN is not a 'new' material, recent manufacturability developments over the past 15 years have made this an exciting and viable ceramic design material.

One of the most useful applications AlN has found is in replacing beryllium oxide (BeO) in the semiconductor industry.  This substitution is due to BeO's toxicity.  The thermal expansion coefficient of AlN is lower than BeO or alumina, and closely matches that of the silicon wafers used in electronics.  Once a limitation for AlN's use in electronic applications there are now processes to metallize AlN.

There are electronic and structural grades of this material, classified as such by the thermal conductivity, which is controlled by the purity of the AlN.  Pristine material is White, high purity is tan, and grey color indicates contaminants. 

 

Properties
Units
Test
Value
Physical
Chemical Formula
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C
Density, r
g/cm3
ASTM C20
2.25
Color
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black
Crystal Structure
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hexagonal
Water Absorption
% @R.T.
ASTM C373
0.5 - 3.0
Hardness
Moh's
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1.0 - 1.5
Hardness
knoop (kg/mm2)
Knoop 100g
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Mechanical
Compressive Strength
MPa @ R.T.
ASTM C773
96
Tensile Strength
MPa @ R.T.
ACMA Test #4
4.8
Modulus of Elasticity
(Young's Mod.)
GPa
ASTM C848
4.8
Flexural Strength (MOR)
MPa @ R.T.
ASTM F417
50
Poisson's Ratio, u
-
ASTM C818
--
Fracture Toughness, KIc
MPa x m1/2
Notched Beam Test
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Thermal
Max. Use Temperature
(* denotes inert atm.)
șC
No load cond.
3650 *
Thermal Shock Resistance
DT (șC)
Quenching
200 - 250
Thermal Conductivity
W/m-K @ R.T.
ASTM C408
24
Coefficient of Linear Thermal Expansion, al
mm/m-șC (~25șC through ±1000șC)
ASTM C372
8.39
Specific Heat, cp
cal/g-șC @ R.T.
ASTM C351
0.16
Electrical
Dielectric Constant
1MHz @ R.T.
ASTM D150
--
Dielectric Strength
kV/mm
ASTM D116
--
Electrical Resistivity
Wcm @ R.T.
ASTM D1829
7 x 10-3
 
 
*Although we have no reason to doubt the accuracy of the data presented, Ferro-Ceramic Grinding Inc. offers this information for comparison only, and disclaims any and all liability from error, omissions or inaccuracies, such that it does not constitute a warranty or representation for which we shall assume legal responsibility.