Aluminum Nitride vs. SiAlON
Both aluminum nitride and SiAlON are non-oxide engineering ceramics. There are 18 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.
For each property being compared, the top bar is aluminum nitride and the bottom bar is SiAlON.
Metric UnitsUS Customary Units
Mechanical Properties
| Compressive (Crushing) Strength, MPa | 2100 | |
| 2620 |
| Elastic (Young's, Tensile) Modulus, GPa | 330 | |
| 290 |
| Flexural Strength, MPa | 190 to 400 | |
| 680 |
| Fracture Toughness, MPa-m1/2 | 2.9 | |
| 6.3 |
| Knoop Hardness | 1160 | |
| 1700 |
| Poisson's Ratio | 0.21 to 0.31 | |
| 0.23 |
Thermal Properties
| Maximum Temperature: Mechanical, °C | 1380 | |
| 1200 |
| Maximum Thermal Shock, °C | 220 | |
| 300 |
| Specific Heat Capacity, J/kg-K | 780 | |
| 880 |
| Thermal Conductivity, W/m-K | 80 to 190 | |
| 19 |
| Thermal Expansion, µm/m-K | 4.2 to 5.4 | |
| 3.6 |
Electrical Properties
| Dielectric Constant (Relative Permittivity) At 1 MHz | 6.9 to 28 | |
| 9.3 |
| Dielectric Strength (Breakdown Potential), kV/mm | 15 to 56 | |
| 8.3 |
| Electrical Resistivity Order of Magnitude, 10x Ω-m | 10 to 12 | |
| 14 |
Otherwise Unclassified Properties
| Density, g/cm3 | 2.9 to 3.3 | |
| 3.3 |
Common Calculations
| Stiffness to Weight: Axial, points | 55 to 63 | |
| 50 |
| Stiffness to Weight: Bending, points | 69 to 80 | |
| 67 |
| Thermal Diffusivity, mm2/s | 31 to 74 | |
| 6.4 |