Materials / Compare
Ceramic Alumina 96% vs. Wood
Compare Ceramic Alumina 96% vs. Wood strength, stiffness, weight and thermal properties.
| Try it on a partA sample part to run stress or thermal on, free in your browser | Open in LessCAD | Open in LessCAD |
|---|---|---|
| Mechanical | ||
| Yield strength | not given (tensile used) | not given (tensile used) |
| Ultimate tensile strength | 221MPasourcetypical tensile strength, 25 °C (ACMA Test #4) | 99MPasourcemodulus of rupture (no direct tensile value) |
| Compressive strength | 2,068MPasourcetypical, 20 °C (ASTM-C773) | 46.6MPasourcecompression parallel to grain (maximum crushing strength), 12% MC |
| Flexural strength | 358MPasourceflexural strength (MOR), 20 °C (ASTM-F417) | 99MPasourcemodulus of rupture (static bending), 12% MC |
| Elongation at break | not sourced | not sourced |
| Young's modulus (stiffness) | 303GPasourcetypical, 20 °C (ASTM-C848) | 12.5GPasourcebending MOE, parallel to grain |
| Density | 3,720kg/m³sourcetypical (ASTM-C20) | not sourced |
| Strength to weight | 59.4kN·m/kg | not sourced |
| Stiffness to weight | 81.5MN·m/kg | not sourced |
| Poisson's ratio | 0.21sourcetypical, 20 °C (ASTM-C848) | 0.35sourcemu_LR (red oak group, ~12% MC) |
| Shear modulus | 125GPa27x stiffer in shear | 4.63GPa |
| Bulk modulus | 174GPa | 13.9GPa |
| Speed of sound | 9,025m/s | not sourced |
| Thermal | ||
| Thermal conductivity | 24.7W/m·Ksourcetypical, 20 °C (ASTM-C408) | 0.18W/m·Ksourceacross grain, 12% MC (Table 4-7, approximate) |
| Thermal expansion | 8.2µm/m·Ksourcemean, 25-1000 °C (ASTM-C372) | 3.1–4.5µm/m·Ksourceparallel to grain, ovendry wood, range across species |
| 100 mm part over a 50 °C swing | 41µm growth | 19µm growth2.16x less |
| Specific heat | 880J/kg·Ksourcetypical, 100 °C (ASTM-E1269) | 1,700J/kg·Ksourcesolid wood (all species), 12% MC, 27 C |
| Heats up and cools (diffusivity) | 7.55mm²/s | not sourced |
| Thermal shock resistance | 1,736W/m7.12x more resistant | 244W/m |
| Values for | CoorsTek AD-96, nominal 96% Al2O3 sintered alumina, typical values; CoorsTek "Ceramic Seal Material Properties" (© 2018, 01899 F). AD-96 is the general 96% grade, not the ADS-96R substrate grade. | Northern red oak (Quercus rubra), clear straight-grained specimens at 12% MC, parallel to grain unless stated; USDA FPL Wood Handbook FPL-GTR-282 (2021) Ch. 4 and Ch. 5 |
Every value links to the document that states it. "Not sourced" means no citable source states it (or only a specification minimum); figures computed from it are left out too.
Questions
Is Ceramic Alumina 96% stronger than Wood?
Ceramic Alumina 96% is stronger: its tensile strength is 221 MPa against 99 MPa for Wood (2.23x).
Which is stiffer, Ceramic Alumina 96% or Wood?
Ceramic Alumina 96% is stiffer: Young's modulus 303 GPa against 12.5 GPa for Wood, so the same part in Ceramic Alumina 96% deflects less under the same load.
Which conducts heat better, Ceramic Alumina 96% or Wood?
Ceramic Alumina 96% conducts heat better: 24.7 W/m·K against 0.18 W/m·K for Wood.
Which expands less with temperature?
Wood expands less: 3.8 µm/m·K against 8.2 µm/m·K for Ceramic Alumina 96%.