SiAlON vs. Silicon Nitride
Both SiAlON and silicon nitride are non-oxide engineering ceramics. There are 17 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown.
For each property being compared, the top bar is SiAlON and the bottom bar is silicon nitride.
Metric UnitsUS Customary Units
Mechanical Properties
Compressive (Crushing) Strength, MPa | 2620 | |
600 to 2950 |
Elastic (Young's, Tensile) Modulus, GPa | 290 | |
140 to 310 |
Flexural Strength, MPa | 680 | |
130 to 810 |
Fracture Toughness, MPa-m1/2 | 6.3 | |
3.1 to 6.2 |
Poisson's Ratio | 0.23 | |
0.24 to 0.27 |
Thermal Properties
Maximum Temperature: Mechanical, °C | 1200 | |
1000 to 1330 |
Maximum Thermal Shock, °C | 300 | |
290 to 750 |
Specific Heat Capacity, J/kg-K | 880 | |
720 to 800 |
Thermal Conductivity, W/m-K | 19 | |
12 to 31 |
Thermal Expansion, µm/m-K | 3.6 | |
2.5 to 3.2 |
Electrical Properties
Dielectric Constant (Relative Permittivity) At 1 MHz | 9.3 | |
8.0 to 10 |
Dielectric Strength (Breakdown Potential), kV/mm | 8.3 | |
18 |
Electrical Resistivity Order of Magnitude, 10x Ω-m | 14 | |
11 to 12 |
Otherwise Unclassified Properties
Density, g/cm3 | 3.3 | |
2.2 to 3.4 |
Common Calculations
Stiffness to Weight: Axial, points | 50 | |
34 to 53 |
Stiffness to Weight: Bending, points | 67 | |
65 to 78 |
Thermal Diffusivity, mm2/s | 6.4 | |
7.5 to 13 |