Alumina vs. GM-120 Glass Ceramic
Alumina belongs to the oxide-based engineering ceramics classification, while GM-120 glass ceramic belongs to the glass and glass-ceramics. There are 10 material properties with values for both materials. Properties with values for just one material (16, in this case) are not shown.
For each property being compared, the top bar is alumina and the bottom bar is GM-120 glass ceramic.
Metric UnitsUS Customary Units
Material Properties
| Density, g/cm3 | 3.4 to 4.1 | |
| 2.5 |
| Dielectric Strength (Breakdown Potential), kV/mm | 8.9 to 12 | |
| 11 |
| Elastic (Young's, Tensile) Modulus, GPa | 220 to 370 | |
| 56 |
| Electrical Resistivity Order of Magnitude, 10x Ω-m | 6.2 to 14 | |
| 10 |
| Flexural Strength, MPa | 260 to 430 | |
| 57 |
| Maximum Thermal Shock, °C | 200 to 300 | |
| 110 |
| Stiffness to Weight: Axial, points | 35 to 53 | |
| 13 |
| Stiffness to Weight: Bending, points | 57 to 62 | |
| 52 |
| Thermal Conductivity, W/m-K | 14 to 30 | |
| 3.0 |
| Thermal Expansion, µm/m-K | 6.7 to 8.2 | |
| 9.5 |