BLEND FOR PREPARING STRUCTURAL ALUMINA CERAMIC MATERIAL AND METHOD OF MANUFACTURING PRODUCTS MADE THEREOF Russian patent published in 2001 - IPC

FIELD: chemical industry, preparation of structural alumina materials from natural bauxites. SUBSTANCE: blend comprises natural alumina bauxite and sintering additives: 6-12 wt % of titanium dioxide cellulated per blend including initial content thereof in bauxite and depending on degree of ferruginosity of bauxite and 1-3 wt % of calcium fluoride or fluorite. Bauxite comprises, wt %: Al₂O₃, 69-80; TiO₂, 2.5-8.4; Fe₂O₃, 1.08-4.65; SiO₂, 5-25; and other admixtures, 0.7-2.8. Method comprises mixing natural refractory bauxite with sintering fluoride and oxide additives, burning, grinding, pressing, drying and sintering at temperatures from 1340 to 1420 C. EFFECT: new composition of blend having high an stable values of mechanical characteristics. 3 cl, 5 ex