Norton Company

Thomas E Cottringer

Ralph Bauer

Ronald H Van De Merwe

Charles V Rue

Richard J Klok

Scott W Pellow

Walter A Yarbrough

Martin Bradley Barnes

Fine powders of ceramic materials can be obtained by firing a precursor powder in a rotary kiln while carried on coarse carrier particles.

Firing fines

An alumina based ceramic fiber having submicron sized alpha alumina crystals and a density of at least 95% theoretical is obtained from a sol-gel process.

Alumina sol-gel fiber

The hardness and microstructure of aluminous abrasives produced from alumina gels are enhanced by introduction of seed material as by wet vibratory milling of the material with alumina media, or by the direct addition of very fine alpha alumina particles in the amount of 1% or less.

Abrasive material and method

A process is described for the production of bonded abrasive products in which the abrasive particles are filamentary alumina particles with a substantially uniform cross-section and an aspect ratio of at least about 1:1.

Sintered sol gel alumina abrasive filaments

A filament shaped sintered alumina based abrasive made up predominantly of fine alpha alumina crystals.

Growing community of inventors

Niagara Falls, Canada

Thomas E Cottringer