Granular abrasive material

US5259147A · kind A · utility

Assignee

• Vereinigte Schmirgel-und Maschinenfabriken Aktiengesellschaft · DE

Inventors

• Wolfgang Falz · Seelze, DE
• Gunter Bigorajski · Gehrden, DE
• Herbert Exner · Waldsee, DE

Key dates

• Filing date: Feb 18, 1993
• Grant date: Nov 9, 1993
• Expiry date: Feb 18, 2013

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/24413
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

A granular abrasive material is produced from a dispersion consisting of raw materials containing alumina, compounds containing silica and other additives. The dispersion is ground to a sinterable slip with a grain size of less than 1 micrometer. The slip is dried and may be pressed before being subjected to a multi-stage heating process to produce sintered corundum crystals.