• Alumina / Aluminum Oxide Synonyms:

Al2O3, alpha-Alumina, alumina, activated alumina, aluminum oxide, aluminum oxide (2:3), aluminum trioxide, CAS# 1344-28-1, aluminum oxide, al2o3, alumina fused, abrasive, grit,

• Alumina / Aluminum Oxide Formula: 
  
          Al₂O₃

• Alumina / Aluminum Oxide Description:

a) Aluminium hydroxide minerals are the main component of bauxite, the principal ore of aluminium. The bauxite ore is made up of a mixture of the minerals gibbsite (Al(OH)3), boehmite (?-AlO(OH)), and diaspore (a-AlO(OH)) along with iron oxides and hydroxides, quartz and clay minerals.

b) Bauxite is purified by the Bayer process: Al2O3 + 3 H2O + 2 NaOH ? 2NaAl(OH)4

c) The other components of bauxite do not dissolve. The SiO2 dissolves as silicate Si(OH)62-. Upon filtering, Fe2O3 is removed. When the Bayer liquor is cooled, Al(OH)3 precipitates, leaving the silicates in solution. The mixture is then calcined (heated strongly) to give aluminium oxide: 2 Al(OH)3 ? Al2O3 + 3 H2O

d) The formed Al2O3 from bauxite is alumina. The alumina formed tends to be multi-phase; i.e., constituting several of the alumina phases rather than solely corundum. The production process can therefore be optimized to produce a tailored product.

• Alumina / Aluminum Oxide Typical Chemical Properties Available:

a) Purities available from 95% (industrial grade) to 99.999% (high purity grade)

b) Product is also available to MIL-A-22262B

• Alumina / Aluminum Oxide Typical Physical Properties Available:

Sintered pieces, targets, single crystals, tumbling media (1 1/2" x 2" down to 24 x 240 mesh), coarse grit, hollow bubbles, fine powder, in a colloidal dispersion, and nanoparticles

• Alumina / Aluminum Oxide Nominal Physical Constants: