Borosilicate Glass vs. Germanium Oxide Glass
Both borosilicate glass and germanium oxide glass are glass and glass-ceramics. There are 11 material properties with values for both materials. Properties with values for just one material (17, in this case) are not shown. Please note that the two materials have significantly dissimilar densities. This means that additional care is required when interpreting the data, because some material properties are based on units of mass, while others are based on units of area or volume.
For each property being compared, the top bar is borosilicate glass and the bottom bar is germanium oxide glass.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 67 to 80 | |
| 63 |
| Flexural Strength, MPa | 34 to 69 | |
| 79 |
| Poisson's Ratio | 0.21 | |
| 0.3 |
Thermal Properties
| Specific Heat Capacity, J/kg-K | 830 | |
| 430 |
| Thermal Conductivity, W/m-K | 1.2 | |
| 0.0060 |
| Thermal Expansion, µm/m-K | 3.3 to 5.1 | |
| 9.0 |
Otherwise Unclassified Properties
| Density, g/cm3 | 2.2 to 2.6 | |
| 4.8 |
| Refractive Index | 1.5 | |
| 1.8 |
Common Calculations
| Stiffness to Weight: Axial, points | 15 to 17 | |
| 7.3 |
| Stiffness to Weight: Bending, points | 55 to 61 | |
| 28 |
| Thermal Diffusivity, mm2/s | 0.54 to 0.63 | |
| 0.0029 |