The oxidized hexagonal aluminum bar is obtained by chemically treating the bauxite raw material to remove oxides of silicon, iron, titanium, etc., and is a high purity alumina raw material, and the Al2O3 content is generally above 99%. The mineral phase consists of 40% to 76% γ-Al2O3 and 24% to 60% α-Al2O3. γ-Al2O3 can be converted to α-Al2O3 (corundum) at 950-1200 °C, and ficant volume shrinkage occurs at the same time.
Containing elements
Aluminum and oxygen
Chemical properties
Acid reaction
Al2O3 + 6HCL == 2AlCl3 + 3H20
Al2O3 + 6H+ == 2Al3+ + 3H2O
Reaction with alkali
Al2O3 + 2NaOH == 2NaAlO2 + H2O
Al2O3 + 2OH- == 2AlO2- + H2O
