Method for improving the quality of abrasive grains

US4278449A · kind A · utility

Assignee

• Tyrolit—Schleifmittelwerke Swarovski AG & Co K.G. · AT

Inventors

• Harald Helletsberger · Wattens, AT
• Anton Aichhorn · Thaur, AT
• Erich Bogusch · Schwaz, AT

Key dates

• Filing date: Dec 6, 1979
• Grant date: Jul 14, 1981
• Expiry date: Dec 6, 1999

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09K3/1436
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Abrasive grain, corundum (Al.sub.2 O.sub.3) comprising titanium oxide, preferably Ti.sub.2 O.sub.3, is provided with a ceramic coating. The abrasive grain is subjected to a heat treatment whereby the Ti-oxides change from the trivalent into the quadrivalent degree of oxidation. The coating and the change of the degree of oxidation are effected simultaneously.