Sintered abrasive particles for grinding wheels are prepared by sintering bauxite or alumina powder and have a truncated prism shape on two of their surfaces

摘要

Abrasive particles prepared by sintering alumina or bauxite powder have a surface/volume ratio above 2 mm-1, preferably above 10 mm-1, more preferably above 20 mm-1, and a truncated prism shape, preferably on two surfaces plane and perpendicular to the axis of the prism. The prism can have a section with concavities, such as a star-shaped section, and can have a symmetry of revolution of 3 to 6. The height/width ratio of the particles is preferably 1-2.5. An Independent claim is given for use of the abrasive particles in grinding wheels for steel.