Method of making .beta."-alumina

Details Method of making .beta."-alumina Method of making .beta."-alumina

C - Chemistry, Metallurgy

01

F

23/248

C01F 7/04 (2006.01) C01F 7/02 (2006.01) C04B 35/10 (2006.01) C04B 35/113 (2006.01)

Patent

CA 1328982

ABSTRACT The invention provides a method of making .beta."-alumina by heating aluminium oxide in the presence of Na2O. A metal oxide dopant in the form of Li2O, MgO, ZnO, CoO, NiO, FeO or mixtures thereof, or a precursor of the dopant, is dispersed in a cubic-close packed aluminium oxide or a precursor thereof to form a starting mixture which is calcined by heating to 250-1100°C in an oxygen- containing atmosphere. Na2O is then dispersed in the calcined starting mixture to form a final mixture, and the final mixture is heated in an oxygen-containing atmosphere to above 1100°C to produce .beta."-alumina.

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