TITANIUM OXIDE-CONTAINING ALUMINIUM OXIDE PARTICLES BASED ON CORUNDUM MELTED IN AN ELECTRIC ARC FURNACE FROM CALCINED ALUMINA, AND A METHOD FOR THE PRODUCTION THEREOF

摘要

Titanium oxide-containing aluminium oxide particles on the basis of in the electric arc furnace of calcined alumina molten corundum, with the chemical composition:– Al₂O₃ 97.0%.%– Fe₂O₃ ≥ 0.05 – 0.2 Wt..%– Sio₂ ≥ 0.1 – & Lt; 0.5% by.%– Tio₂ 1.3 – 1.8 Wt..%– Zro₂ ≥ 0.02 – & Lt; 0.1% by.%– Na₂O 0.05 – 2.0 wt.% and– Cao + mgo + k₂O 0.2 wt..%,based in each case on the total weight of the molten corundum,characterized in thatthe ratio of the sum of the parts by weight of fe₂O₃, Sio₂ and zro₂ to the proportion by weight of na₂5 & Lt; 10 is.