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Aluminum Oxide |
Al2O3 |
aluminum oxide, alumina, corundum
Aluminum oxide (Al2O3), or more commonly referred to alumina, is a white crystalline substance that available in various polymorph structures depending on the operational conditions in which it is formed or used. Alumina oxide is a hard material that can be used as an abrasive, is a good electrical insulator (dielectric), has relatively high thermal conductivity, can be used as a catalyst or as a catalyst carrier, is chemically inert and non-toxic, and exhibits good thermal stability. MemPro's aluminum oxide nCeramic™ nanofibers are available in either gamma (γ) or alpha (α) crystalline structure with narrow fiber diameter distributions (ave. 100 - 120 nm).
Applications
- advanced ceramic composites
- strengthening of materials
- optical displays
- high-temperature filtration
- electrical components
- catalyst support structures
- fillers for plastics
- catalyst in the Claus process for waste gas treatment in refineries
- superconducting devices
- insulation
- fire retardant
- manufacturing of zeolites
Characteristics
Appearance |
white, flake, fibrous, hygroscopic |
Structure |
crystalline (gamma- or alpha- polymorphs) |
Density |
4 gcm-3 |
Surface area |
150 - 200 m2g-1 |
Melting Point |
2,072°C |
Thermal Conductivity |
30 Wm-1K-1 |
Electrical Conductivity |
< 10-14 Sm-1 |
Dielectric Strength |
13.4 MVm-1 |
Hardness |
9 (Mohs) |
Fiber diameter |
100 - 120 nm (ave.) |
Fiber length |
>5 µm |
Refractive Index |
1.74926 (λ=1.36 µm) |
Catalyst Support |
Yes |
Other |
high chemical resistance, catalytically active, insoluble in water |
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