SiAlON vs. Engineering Porcelain
SiAlON belongs to the non-oxide engineering ceramics classification, while engineering porcelain belongs to the oxide-based engineering ceramics. There are 23 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.
For each property being compared, the top bar is SiAlON and the bottom bar is engineering porcelain.
Metric UnitsUS Customary Units
Mechanical Properties
| Compressive (Crushing) Strength, MPa | 2620 | |
| 590 |
| Elastic (Young's, Tensile) Modulus, GPa | 290 | |
| 67 to 150 |
| Flexural Strength, MPa | 680 | |
| 43 to 160 |
| Fracture Toughness, MPa-m1/2 | 6.3 | |
| 2.0 |
| Knoop Hardness | 1700 | |
| 600 |
| Poisson's Ratio | 0.23 | |
| 0.17 |
| Shear Modulus, GPa | 120 | |
| 34 |
| Tensile Strength: Ultimate (UTS), MPa | 190 | |
| 130 |
Thermal Properties
| Maximum Temperature: Mechanical, °C | 1200 | |
| 1170 |
| Maximum Thermal Shock, °C | 300 | |
| 170 to 290 |
| Specific Heat Capacity, J/kg-K | 880 | |
| 600 to 1000 |
| Thermal Conductivity, W/m-K | 19 | |
| 1.8 to 6.5 |
| Thermal Expansion, µm/m-K | 3.6 | |
| 2.0 to 6.6 |
Electrical Properties
| Dielectric Constant (Relative Permittivity) At 1 MHz | 9.3 | |
| 6.5 |
| Dielectric Strength (Breakdown Potential), kV/mm | 8.3 | |
| 11 to 25 |
| Electrical Resistivity Order of Magnitude, 10x Ω-m | 14 | |
| 9.0 to 12 |
Otherwise Unclassified Properties
| Density, g/cm3 | 3.3 | |
| 2.3 to 3.0 |
Common Calculations
| Stiffness to Weight: Axial, points | 50 | |
| 16 to 29 |
| Stiffness to Weight: Bending, points | 67 | |
| 49 to 65 |
| Strength to Weight: Axial, points | 16 | |
| 12 to 16 |
| Strength to Weight: Bending, points | 22 | |
| 19 to 25 |
| Thermal Diffusivity, mm2/s | 6.4 | |
| 0.73 to 3.9 |
| Thermal Shock Resistance, points | 13 | |
| 11 to 53 |