| 摘要 |
PURPOSE:To improve the efficiency of abrasion by powdering an ingot obtd. by melting and quenching a raw material of an alumina-zirconia abrasive material, heat-treating the powder at the crystal transition point of zirconia or above and specifying the content of remaining cubic zirconia crystal. CONSTITUTION:A raw material of an alumina-zirconia abrasive material consisting of Al2O3, 10-60wt.% ZrO3 and, if necessary, 0.05-7wt.% stabilizer selected among Y2O3, CaO, MgO, TiO2 and other rare earth oxides is melted and quenched to obtain an ingot. After this ingot is powdered, it is heat-treated at a temp. which is the crystal transition point of zirconia or above, pref. at 650+ or -50 deg.C for 3-10hr to obtain a lapping compound with a content of remaining cubic zirconia crystal of 30% or less. If necessary, 5-50wt.% above powdered lapping compound with a mean particle diameter of 0.5-50mum and a max. particle diameter of 100mum, water and an acidic compd. are compounded to obtain a compsn. for abrasion. |
