Process for the production of sintered material based on .alpha.-aluminum oxide, especially for abrasives
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United States of America Patent
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Aug 17, 1993
Grant Date -
N/A
app pub date -
Jun 17, 1992
filing date -
Jun 21, 1991
priority date (Note) -
Expired
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Abstract
A sintered material, especially usuable as an abrasive, based on .alpha.-aluminum oxide is produced from Al(OH).sub.3 or aluminum oxide calcined at a lower temperature. Aluminum hydroxide resulting in the Bayer process can be used as the Al(OH).sub.3. The sintered material is distinguished by a crystallite size of standard <0.5 .mu.m, high density and great hardness.
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