Sol-gel alumina shaped bodies

Details Sol-gel alumina shaped bodies Sol-gel alumina shaped bodies

1990-05-09

1991-07-30

Group, Karl

Abrasive tool making process, material, or composition

With inorganic material

Metal or metal oxide

501 12, 501 95, 501127, B24D 302

Patent

active

050357247

ABSTRACT:
A process for producing dry substantially crack-free shaped bodies, such as grinding wheels, from a sol-gel alumina hydrate composition is disclosed. The shaped bodies are formed by either a one or a two step forming process and avoid having to pre-prepare alpha alumina grits. The addition of specific crack-avoiding drying control additives, e.g. whiskers, chopped fibers, agarose gels, and formamide, to the sol-gel alumina hydrate prior to water removal therefrom substantially prevents crack-formation during the water removal operation.

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patent: 4786292 (1988-11-01), Janz et al.
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