Engineering Porcelain vs. Aluminum Nitride
Engineering porcelain belongs to the oxide-based engineering ceramics classification, while aluminum nitride belongs to the non-oxide engineering ceramics. There are 20 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 engineering porcelain and the bottom bar is aluminum nitride.
Metric UnitsUS Customary Units
Mechanical Properties
| Compressive (Crushing) Strength, MPa | 590 | |
| 2100 |
| Elastic (Young's, Tensile) Modulus, GPa | 67 to 150 | |
| 330 |
| Flexural Strength, MPa | 43 to 160 | |
| 190 to 400 |
| Fracture Toughness, MPa-m1/2 | 2.0 | |
| 2.9 |
| Knoop Hardness | 600 | |
| 1160 |
| Poisson's Ratio | 0.17 | |
| 0.21 to 0.31 |
Thermal Properties
| Maximum Temperature: Mechanical, °C | 1170 | |
| 1380 |
| Maximum Thermal Shock, °C | 170 to 290 | |
| 220 |
| Specific Heat Capacity, J/kg-K | 600 to 1000 | |
| 780 |
| Thermal Conductivity, W/m-K | 1.8 to 6.5 | |
| 80 to 190 |
| Thermal Expansion, µm/m-K | 2.0 to 6.6 | |
| 4.2 to 5.4 |
Electrical Properties
| Dielectric Constant (Relative Permittivity) At 1 MHz | 6.5 | |
| 6.9 to 28 |
| Dielectric Strength (Breakdown Potential), kV/mm | 11 to 25 | |
| 15 to 56 |
| Electrical Dissipation At 1 Hz | 0.0043 to 0.028 | |
| 0.0019 |
| Electrical Dissipation At 1 MHz | 0.00043 to 0.013 | |
| 0.00020 to 0.0010 |
| Electrical Resistivity Order of Magnitude, 10x Ω-m | 9.0 to 12 | |
| 10 to 12 |
Otherwise Unclassified Properties
| Density, g/cm3 | 2.3 to 3.0 | |
| 2.9 to 3.3 |
Common Calculations
| Stiffness to Weight: Axial, points | 16 to 29 | |
| 55 to 63 |
| Stiffness to Weight: Bending, points | 49 to 65 | |
| 69 to 80 |
| Thermal Diffusivity, mm2/s | 0.73 to 3.9 | |
| 31 to 74 |