Silicon Carbide vs. Silica Aerogel
Silicon carbide belongs to the non-oxide engineering ceramics classification, while silica aerogel belongs to the oxide-based engineering ceramics. There are 11 material properties with values for both materials. Properties with values for just one material (10, 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 silicon carbide and the bottom bar is silica aerogel.
Metric UnitsUS Customary Units
Mechanical Properties
Elastic (Young's, Tensile) Modulus, GPa | 370 to 490 | |
0.0050 |
Poisson's Ratio | 0.14 to 0.21 | |
0.2 |
Tensile Strength: Ultimate (UTS), MPa | 210 to 370 | |
0.016 |
Thermal Properties
Thermal Conductivity, W/m-K | 120 to 170 | |
0.016 |
Thermal Expansion, µm/m-K | 4.0 to 4.5 | |
2.0 |
Otherwise Unclassified Properties
Density, g/cm3 | 3.0 to 3.2 | |
0.1 |
Common Calculations
Stiffness to Weight: Axial, points | 69 to 84 | |
0.028 |
Stiffness to Weight: Bending, points | 79 to 82 | |
57 |
Strength to Weight: Axial, points | 18 to 34 | |
0.044 |
Strength to Weight: Bending, points | 24 to 38 | |
1.4 |
Thermal Shock Resistance, points | 6.9 to 18 | |
110 |