Norton Company

Christopher E Knapp

Ralph Bauer

Scott W Pellow

Ronald W Trischuk

Useful ceramic bodies can be made by mixing zirconia powder with seeded alumina gel, drying, and firing at a high enough temperature to convert the alumina in the gel to microcrystalline alpha alumina. Abrasive grits made in this way, with a zirconia content between 15 and 30 weight percent and at least half the zirconia in the tetragonal crystal form are particularly valuable for use in grinding wheels for snagging steels.

Sintered alumina-zirconia ceramic bodies

Stabilized sintered zirconia bodies are made by employing zirconia powders made from rapidly quenched co-fusions of zirconia with a stabilizing metal oxide. Finer crystallinity and higher strength is achieved in the fired body.

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Hamilton, Canada

Christopher E Knapp