| 摘要 |
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 DEG -1100 DEG 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 DEG C. to produce beta ''-alumina. |
