High Alumina (AlO) Content: Typically 80% alumina.
Low Impurities: Low in FeO (iron oxide), TiO (titanium oxide), alkalis, and silica.
High Refractoriness: Can withstand temperatures above 1700C.
Good Thermal Stability: Resists thermal shock, abrasion, and corrosion.
These are typically produced by calcining bauxite at 16001800C, enhancing alumina content and improving physical properties.
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