Aluminum Nitride
Family Overview
Aluminum Nitrides (AlN) combine high thermal conductivity with strong electrical resistance, making AlN an excellent solution for many electronic applications. Unlike most electrically insulative materials — which are often also thermally insulative — AlN allows electrical systems to dissipate heat quickly in order to maintain maximum efficiency.
- Thermally stable
- Electrical resistivity
Hot Pressed Aluminum Nitride
Hot pressed aluminum nitride (AlN) is used in applications requiring high electrical resistivity in additional to exceptional thermal conductivity. The applications for hot pressed AlN typically involve rigorous or abrasive environments and high-temperature thermal cycling.
Direct Sintered Aluminum Nitride
Direct sintered aluminum nitride is used in applications requiring high thermal conductivity and electrical resistivity with extreme temperature fluctuation, like high-intensity discharge lighting.
Ceramics Expertise
CoorsTek engineers our aluminum nitrides to meet our customers' specifications. Our application-specific formulations combined with over a century of experience mean we can help you find the optimal ceramic material for your application.
| Properties | Units | AlN 180 | AlN-HP | AlN-HTC |
| Density | g/cm³ | 3.30 | 3.25 | 3.30 |
| Color | — | TAN | GRAY | GRAY |
|
4-PT Flexural Strength (MOR) |
MPa (psi x 10³) |
300 | 365 | 375 |
| Young's Modulus (20° C) |
GPa (psi x 106) |
310 | 276 | 330 |
| Compressive Strength (20° C) |
MPa |
2000 | — | — |
| Fracture Toughness (KIC) |
MPa m1/2 | 3.03 | 3.25 | — |
| Thermal Conductivity (20° C) |
W/m | 180 | 80 | 150 - 170 |
| Coefficient of Thermal Expansion (25-1000°C) |
1x10-6/°C | 5.6 | 5.5 | 5.5 |
| Specific Heat (100° C) |
J/kg*K | 738 | 705 | 705 |
| Dielectric Strength (6.35mm) |
ac-kV/mm (ac V/mil) |
20 | 16 | — |
| Dielectric Constant (1 MHz) |
25° C | 8.6 | 8.5 | 9.05 |
| Dielectric Loss (tan delta) (1 MHz 25° C) |
25° C | |||
| Volume Resistivity (25° C) |
ohm-cm | >1012 | >1013 | >1014 |