SiAlON vs. Hexagonal Boron Nitride
Both SiAlON and hexagonal boron nitride are non-oxide engineering ceramics. There are 15 material properties with values for both materials. Properties with values for just one material (11, in this case) are not shown.
For each property being compared, the top bar is SiAlON and the bottom bar is hexagonal boron nitride.
Metric UnitsUS Customary Units
Mechanical Properties
| Compressive (Crushing) Strength, MPa | 2620 | |
| 21 to 250 |
| Elastic (Young's, Tensile) Modulus, GPa | 290 | |
| 14 to 60 |
| Flexural Strength, MPa | 680 | |
| 18 to 140 |
| Poisson's Ratio | 0.23 | |
| 0.11 |
Thermal Properties
| Maximum Temperature: Mechanical, °C | 1200 | |
| 1030 to 2350 |
| Specific Heat Capacity, J/kg-K | 880 | |
| 840 to 1610 |
| Thermal Conductivity, W/m-K | 19 | |
| 29 to 96 |
| Thermal Expansion, µm/m-K | 3.6 | |
| 0.54 to 18 |
Electrical Properties
| Dielectric Constant (Relative Permittivity) At 1 MHz | 9.3 | |
| 4.0 to 4.4 |
| Dielectric Strength (Breakdown Potential), kV/mm | 8.3 | |
| 61 to 200 |
| Electrical Resistivity Order of Magnitude, 10x Ω-m | 14 | |
| 13 to 15 |
Otherwise Unclassified Properties
| Density, g/cm3 | 3.3 | |
| 1.9 to 2.1 |
Common Calculations
| Stiffness to Weight: Axial, points | 50 | |
| 4.1 to 18 |
| Stiffness to Weight: Bending, points | 67 | |
| 42 to 69 |
| Thermal Diffusivity, mm2/s | 6.4 | |
| 9.9 to 34 |