Aluminum Nitride vs. Low Expansion Glass-ceramic
Aluminum nitride belongs to the non-oxide engineering ceramics classification, while low expansion glass-ceramic belongs to the glass and glass-ceramics. There are 14 material properties with values for both materials. Properties with values for just one material (12, in this case) are not shown.
For each property being compared, the top bar is aluminum nitride and the bottom bar is low expansion glass-ceramic.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 330 | |
| 83 |
| Flexural Strength, MPa | 190 to 400 | |
| 35 |
| Knoop Hardness | 1160 | |
| 530 |
| Poisson's Ratio | 0.21 to 0.31 | |
| 0.22 |
Thermal Properties
| Maximum Temperature: Mechanical, °C | 1380 | |
| 690 |
| Specific Heat Capacity, J/kg-K | 780 | |
| 800 |
| Thermal Conductivity, W/m-K | 80 to 190 | |
| 1.5 |
| Thermal Expansion, µm/m-K | 4.2 to 5.4 | |
| 1.7 |
Electrical Properties
| Dielectric Constant (Relative Permittivity) At 1 MHz | 6.9 to 28 | |
| 5.7 |
| Electrical Resistivity Order of Magnitude, 10x Ω-m | 10 to 12 | |
| 11 |
Otherwise Unclassified Properties
| Density, g/cm3 | 2.9 to 3.3 | |
| 2.4 |
Common Calculations
| Stiffness to Weight: Axial, points | 55 to 63 | |
| 19 |
| Stiffness to Weight: Bending, points | 69 to 80 | |
| 59 |
| Thermal Diffusivity, mm2/s | 31 to 74 | |
| 0.76 |