Mullite vs. Glass-bonded Mica
Mullite belongs to the oxide-based engineering ceramics classification, while glass-bonded mica belongs to the glass and glass-ceramics. There are 20 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.
For each property being compared, the top bar is mullite and the bottom bar is glass-bonded mica.
Metric UnitsUS Customary Units
Mechanical Properties
| Compressive (Crushing) Strength, MPa | 800 | |
| 270 |
| Elastic (Young's, Tensile) Modulus, GPa | 110 to 170 | |
| 71 |
| Flexural Strength, MPa | 130 to 160 | |
| 79 |
| Tensile Strength: Ultimate (UTS), MPa | 160 | |
| 39 |
Thermal Properties
| Maximum Temperature: Mechanical, °C | 1680 | |
| 450 |
| Maximum Thermal Shock, °C | 170 to 230 | |
| 110 |
| Specific Heat Capacity, J/kg-K | 950 | |
| 500 |
| Thermal Conductivity, W/m-K | 3.5 to 11 | |
| 23 |
| Thermal Expansion, µm/m-K | 5.8 | |
| 6.7 |
Electrical Properties
| Dielectric Constant (Relative Permittivity) At 1 MHz | 6.3 | |
| 6.8 |
| Dielectric Strength (Breakdown Potential), kV/mm | 16 to 17 | |
| 20 |
| Electrical Dissipation At 1 MHz | 0.0025 | |
| 0.0016 |
| Electrical Resistivity Order of Magnitude, 10x Ω-m | 10 to 11 | |
| 10 |
Otherwise Unclassified Properties
| Density, g/cm3 | 2.7 to 3.0 | |
| 2.6 |
Common Calculations
| Stiffness to Weight: Axial, points | 22 to 31 | |
| 15 |
| Stiffness to Weight: Bending, points | 58 to 62 | |
| 52 |
| Strength to Weight: Axial, points | 15 to 17 | |
| 4.1 |
| Strength to Weight: Bending, points | 22 to 24 | |
| 9.7 |
| Thermal Diffusivity, mm2/s | 1.4 to 3.7 | |
| 18 |
| Thermal Shock Resistance, points | 12 to 19 | |
| 5.9 |