Silicon Nitride vs. High-alumina Refractory
Silicon nitride belongs to the non-oxide engineering ceramics classification, while high-alumina refractory belongs to the oxide-based engineering ceramics. There are 8 material properties with values for both materials. Properties with values for just one material (9, in this case) are not shown.
For each property being compared, the top bar is silicon nitride and the bottom bar is high-alumina refractory.
Metric UnitsUS Customary Units
Material Properties
| Density, g/cm3 | 2.2 to 3.4 | |
| 2.1 |
| Flexural Strength, MPa | 130 to 810 | |
| 28 |
| Maximum Temperature: Mechanical, °C | 1000 to 1330 | |
| 1200 |
| Maximum Thermal Shock, °C | 290 to 750 | |
| 210 |
| Specific Heat Capacity, J/kg-K | 720 to 800 | |
| 800 |
| Thermal Conductivity, W/m-K | 12 to 31 | |
| 1.5 |
| Thermal Diffusivity, mm2/s | 7.5 to 13 | |
| 0.87 |
| Thermal Expansion, µm/m-K | 2.5 to 3.2 | |
| 4.3 |