Steatite vs. Engineering Porcelain
Both steatite and engineering porcelain are 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 steatite and the bottom bar is engineering porcelain.
Metric UnitsUS Customary Units
Mechanical Properties
| Compressive (Crushing) Strength, MPa | 540 to 620 | |
| 590 |
| Elastic (Young's, Tensile) Modulus, GPa | 68 to 120 | |
| 67 to 150 |
| Flexural Strength, MPa | 32 to 150 | |
| 43 to 160 |
| Poisson's Ratio | 0.23 | |
| 0.17 |
| Tensile Strength: Ultimate (UTS), MPa | 60 to 220 | |
| 130 |
Thermal Properties
| Maximum Temperature: Mechanical, °C | 750 to 1230 | |
| 1170 |
| Maximum Thermal Shock, °C | 90 to 160 | |
| 170 to 290 |
| Specific Heat Capacity, J/kg-K | 850 to 860 | |
| 600 to 1000 |
| Thermal Conductivity, W/m-K | 1.8 to 2.5 | |
| 1.8 to 6.5 |
| Thermal Expansion, µm/m-K | 7.0 to 9.0 | |
| 2.0 to 6.6 |
Electrical Properties
| Dielectric Constant (Relative Permittivity) At 1 Hz | 6.0 | |
| 5.0 to 10 |
| Dielectric Constant (Relative Permittivity) At 1 MHz | 5.7 to 6.5 | |
| 6.5 |
| Dielectric Strength (Breakdown Potential), kV/mm | 7.9 to 16 | |
| 11 to 25 |
| Electrical Dissipation At 1 Hz | 0.0014 to 0.022 | |
| 0.0043 to 0.028 |
| Electrical Dissipation At 1 MHz | 0.0010 to 0.0060 | |
| 0.00043 to 0.013 |
| Electrical Resistivity Order of Magnitude, 10x Ω-m | 8.0 to 11 | |
| 9.0 to 12 |
Otherwise Unclassified Properties
| Density, g/cm3 | 1.9 to 2.8 | |
| 2.3 to 3.0 |
Common Calculations
| Stiffness to Weight: Axial, points | 14 to 32 | |
| 16 to 29 |
| Stiffness to Weight: Bending, points | 52 to 83 | |
| 49 to 65 |
| Strength to Weight: Axial, points | 6.4 to 32 | |
| 12 to 16 |
| Strength to Weight: Bending, points | 13 to 42 | |
| 19 to 25 |
| Thermal Diffusivity, mm2/s | 0.79 to 1.1 | |
| 0.73 to 3.9 |
| Thermal Shock Resistance, points | 5.1 to 33 | |
| 11 to 53 |