| 摘要 |
An Al2O3 and ZrO2 based abrasive grain containing titanium compounds in a reduced form, especially in the form of oxides and/or suboxides and/or carbides and/or oxycarbides and/or oxycarbonitrides and/or silicides, corresponding to a proportion of 0.5 10 wt. %, expressed as TiO2, containing 20-50 wt. % ZrO2, wherein more than 75 wt. % of the ZrO2 is present in a tetragonal crystal form, having an overall carbon content of 0.03 - 0.5 wt. %, a proportion of impurities caused by raw materials of less than 3.0 wt. %, wherein the rare earth content calculated in the form of oxides is less than 0.1 wt. %, having an Si-compound content of 0.05 -1.0 wt. %, expressed as SiO2, and an Al2O3 content of 50 - 80 wt. %, obtained by melting a mixture required for a corresponding abrasive grain composition, said mixture corresponding to Al2O3, ZrO2, TiO2 and TiO2, and/or raw materials containing the latter in the presence of a surplus of a reducing agent and quenched in such a way that the melt is fully solidified in less than 10 seconds. The invention also relates to a method for the production thereof and the use thereof in abrasives.
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