Perovskite Formation in Hematite–Ilmenite Ores Sintered in ...
The hematite ore was thermally decomposed to magnetite-releasing oxygen at high temperatures in an Ar atmosphere. Si 4+ and Al 3+ ions replaced Fe 3+ ions during heating of the hematite ore leading to formation of iron aluminum oxides and silicon oxides phases such as 2Fe 2 O 3 ·FeAlO 3 ·Al 2 O 3 (s) and 3FeO·3SiO 2 ·Al 2 O 3 (s). 2.