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- Alumina (Al2O3) Synonyms:
aluminum oxide, alumina, activated alumina, calcined alumina, tabular alumina, hydrated alumina, dispersing alumina, infiltrating alumina, reactive alumina, AL203, alumina, ground alumina, synthetic boehmite, CAS# 1344-28-1,
- Alumina (Al2O3) Formula:
Al2O3
- Alumina (Al2O3) Description:
a) Native alumina is found as the mineral corundum. Most bauxite is refined by the Bayer process to remove impurities and produce a nominal 99.5% Al2O3 product.
b) Four types of alumina are generally utilized: calcined, tabular, hydrated, and synthetic boehmite. Aluminas are a family of aluminum oxides (Al2O3) that can take many forms.
c) As a general term, “alumina” refers to the lower temperature transition alumina forms.
- Alumina (Al2O3) Typical Chemical Properties Available:
Purities available from 85%% (industrial grade) up to 99.999% (high purity grade)
- Alumina (Al2O3) Typical Physical Properties Available:
Sintered pieces, targets, tumbling media, colloidal dispersion, and numerous powder granulations as small as nanoparticles
- Alumina (Al2O3) Nominal Physical Constants:
| Molecular Weight (g/mol.) |
101.94 |
| Apparent Density (g/cm3) |
0.7- 0.9 |
| Loose Bulk Density (g/cm3) |
~0.83- 1.01 |
| Max. Use Temperature (°C) (in air) |
1750 |
| Boiling Point (°C) |
a=2040 |
| Specific Surface Area (m2/g) |
0.5- 50 |
| Thermal Conductivity (cal/s-cm-°C) |
0.004- 0.10 |
| Mohs Hardness @20°C |
9.0 |
| pH |
7 -9 |
| Specific Gravity |
3.4- 4.0 |
| Color |
Ivory / White |
| Crystallography |
hexagonal |
- Alumina (Al2O3) Typical Applications:
a) Refractories, abrasives, cement, slag adjusters, traditional & advanced ceramics (lamp components, mechanical and pump seals, nozzles, semiconductor equipment components, nuclear insulation, magnetic recording media, IC packages, & tool bits), aluminum chemicals, flame retardants, fillers, welding fluxes, adsorbents, adhesives, coatings, and detergent zeolites
b) Alumina is an excellent thermal and electrical insulator. Additionally, it is extremely resistant to wear and corrosion.
c) Ceramic injection molding
- Alumina (Al2O3) Typical Packaging:
50 lbs. bags, poly-lined fiber drums and bulk bags
- Alumina / Aluminum Oxide TSCA (SARA Title III) Status:
a) Listed
b) "Aluminium oxide was taken off the United States Environmental Protection Agency's chemicals lists in 1988. Aluminium oxide is on EPA's TRI list if it is a fibrous form." Source: Wikipedia
c) NIOSH Pocket Safety Guide
- Alumina (Al2O3) CAS Number:
CAS# 1344-28-1
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