Du-Co Ceramics manufactures 99.65% crushable alumina ceramic for demanding applications requiring high-purity aluminum oxide combined with controlled porosity and excellent high-temperature performance. Unlike fully dense alumina ceramics, crushable alumina contains significant porosity that allows the material to compress or conform in certain assemblies while still providing excellent wear resistance, mechanical strength, and thermal stability. This unique combination of properties makes crushable alumina an ideal material for specialized electrical, thermal, and industrial applications.
Mechanical, Thermal and Physical Properties
| Material Grade | 99.65% Crushable Alumina Oxide (S-669) ASTM: E1625-15 |
| Chemical Analysis | |
| AL2O3, % | 99.65 min |
| SiO2, % | 0.08 max |
| CaO, % | 0.08 max |
| Fe2O3, % | 0.04 max |
| MgO, % | 0.08 max |
| Mechanical Properties | |
| Porosity, % | MIN 17 |
| Bulk Density, gm/cc | 2.20 |
| Flexural Strength, psi | 5,000-25,000 |
| Compressive Strength, psi | 7,000-30,000 |
| Thermal Properties | |
| Thermal Expansion 25O-700O inch/inch/O CX10-6 | 7.8 |
| Max Operating Temp., OC | |
Need a Specialized High-Purity Alumina Solution?
Du-Co Ceramics manufactures 99.65% crushable alumina ceramic for demanding applications requiring a unique combination of high purity, controlled porosity, and high-temperature performance. Our engineering team can help determine whether crushable alumina is the right material for your application and develop a custom solution to meet your requirements. Contact us today to discuss your project or request a quote.