... : 101.96 Chemical Formulas: Al 2O 3Aluminum Oxide, AluminaThe chemical composition of alumina, impurity content, no more than:Fe2O3 - 0,03 ... %; SiO2 - 0,02%; Na2O- 0,4%The phase composition of the material:α- Al2O3 ≈10-15 %, γ- Al2O3≈80-90%, other ...