WEAR RESISTANT GLASS CERAMIC MATERIAL Russian patent published in 1995 - IPC

FIELD: production of glass ceramic materials. SUBSTANCE: proposed material contains Al₂O₃ and glass, their ratio being (75-85):(25-15) respectively. Mentioned above glass contains (mass % ): SiO₂ 38.13-45.6, TiO₂ 11.55-17.75, Al₂O₃ 16.53-19.24, CaO 2.12-3.64, BaO 18.52-22.2, B₂O₃ 1.36-3.98. Al₂O₃ powder and glass powder are thoroughly mixed, desired articles are prepared by thermoplastic compressing, 0.5 % of oleic acid and 16.5 % of paraffin being added. Paraffin is burnt out by slowly increasing temperature to 860-880 C, thus prepared half-finished products are calcined within 50 min at 1475-1500 C. Wear resistance thus prepared material is (2,99-4,7)·10^-3 mm, its hardness is 10100-10250 MPa, specific volume resistance is (3.0-3.5)(3,0-3,5)·10⁸ ohm·cm. ohm cm. EFFECT: improves quality of desired material. 1 tbl