Machinable aluminium nitride
Final Advanced Materials provides machinable aluminium nitride : Rods, boards or machined parts according to your drawings
Aluminium nitride presentation
It is an electrical insulating refractory material having very high thermal conductivity ( higher than that of copper at 200°C) and showing high resistance to oxidation and abrasion. Unlike sintered ceramics, machining with conventional tools is possible.
This aluminum nitride has equivalent characteristics to Shapal M while being economically more interesting.
This ceramic is available in bars (maxi D.58x300mm), in plates (maxi 315x200x60mm) or in parts machined by ourselves according to plans.
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Properties |
Units |
Alumina silicate raw |
Alumina silicate 1100°C |
Alumina silicate 1300°C |
Macor® |
Glass ceramic (Vitro 800) |
Machinable alumina |
Machinable boron nitride |
Aluminium nitride (Shapal M™) |
Machinable Aluminium nitride |
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Physical characteristics |
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Density |
g/cm3 |
2.2 |
2.4 |
2.5 |
2.52 |
2.7 |
3.8 |
1.85 |
2.9 |
2.9 |
|
Porosity |
% |
1.5 - 2 |
0 - 0.5 |
0 - 0.5 |
0 |
0.096 |
10 |
14 |
0 |
< 0,1 |
|
Water uptake |
% |
1.5 - 2 |
0 - 0.5 |
0 - 0.5 |
0 |
0.038 |
2 - 3.5 |
/ |
0 |
0 |
|
Mechanical characteristics |
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Hardness |
Mohs: 2.5 |
Mohs: 5.5 |
Mohs: 7.5 |
Rockwell A: 48 |
Mohs: 4 |
Mohs: 5 |
Knopp: 4 kg/mm² |
Vickers: 3900 Mpa |
Vickers: 3750 Mpa |
|
|
Compressive Strength |
N/mm2 |
6 |
150 |
800 |
345 |
488 |
422 |
20 |
1200 |
1170 |
|
Flexural Strength |
N/mm2 |
12 |
50 |
80 |
94 |
108 |
267 |
50 |
300 |
300 |
|
Modulus of Elasticity |
GPa |
/ |
/ |
/ |
66.9 |
65 |
/ |
/ |
190 |
180 |
|
Thermal characteristics |
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|
Peak Temperature |
°C |
900 |
1100 |
1400 |
1000 |
800 |
1650 |
850 |
1000 |
1000 |
|
Continuous Temperature |
°C |
700 |
1100 |
1300 |
800 |
800 |
1650 |
850 |
1000 |
1000 |
|
Specific Heat at 20°C |
J/kg°K |
/ |
/ |
/ |
0.79 |
/ |
/ |
1.5 |
/ |
/ |
|
Thermal Conductivity at 100°C |
W/m°K |
1.07 |
1.7 |
2.2 |
1.46 |
1.68 |
4.61 |
90 |
90 |
90 |
|
Coefficient of Expansion 20 - 40°C |
10-6/°K |
/ |
/ |
/ |
9.3 |
/ |
/ |
/ |
4.4 |
/ |
|
20 - 600°C |
/ |
2.9 - 3.6 |
6-8 |
11.4 |
8,6 |
/ |
/ |
4.8 |
4.5 |
|
|
20 - 800°C |
/ |
/ |
/ |
12.6 |
/ |
/ |
/ |
5.1 |
/ |
|
|
20 - 1000°C |
7-12 |
/ |
4-10 |
/ |
/ |
/ |
0.57 |
/ |
/ |
|
|
Electrical characteristics |
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|
Specific Resistivity at 20°C |
Ohm.cm |
1010 |
1012 |
1012 |
1016 |
1.8x1014 |
1014 |
1014 |
1012 |
1012 |
|
Dielectric Constant at 20°C |
at 1 KHz |
/ |
/ |
6.1 |
6.03 |
6~7 |
9 (@ 100kHz) |
4 |
7.1 |
7.1 |
|
Loss Tangent |
at 1 KHz |
/ |
/ |
9x10-5 |
0.005 |
/ |
/ |
0.0012 |
0.001 |
/ |
|
Dielectric Strength at 20°C |
kV/mm |
8-10 |
6-7 |
12-17 |
40 |
> 15 |
7.87 |
2 |
40 |
40 |
|
Chemical characteristics |
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Corrosion resistance at 20°C |
B |
B |
B |
B |
B |
B |
/ |
/ |
/ |
|
|
Resistance to alkalis at 20°C |
B |
B |
B |
TB |
TB |
B |
/ |
/ |
/ |
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