Sol-gel alumina abrasive wheel with improved corner holding
OwnerDavid A. Sheldon, Robert S. Lundberg +1inventors
InventorsDavid A. Sheldon, Robert S. Lundberg, Xiaoming Li
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Abstract
The present invention provides a vitreous-bonded abrasive grinding wheel wherein the abrasive grit portion comprises a sol-gel alumina abrasive and wherein the wheel has improved corner or form holding characteristics and mechanical properties. The invention further includes the bond composition which allows for improved corner or form holding and mechanical properties with sol-gel alumina abrasives.
Claims7
An abrasive grinding wheel comprising a sol-gel alumina abrasive and a vitreous bond wherein the vitreous bond after firing comprises greater than 47 weight % SiO.sub.2, less than about 16 weight % Al.sub.2 O.sub.3, from about 0.5 to about 2.5 weight % K.sub.2 O, about 2.0 to about 3.4 weight % Li.sub.2 O, from about 7 to about 11 weight % Na.sub.2 O and from about 9 to about 16 weight % B.sub.2 O.sub.3.
A vitreous bond for a sol-gel alumina abrasive grinding wheel comprising:
- from about 2.0 to about 3.4 weight % Li.sub.2 O, from about 7 to about 11 weight % Na.sub.2 O, from about 0.5 to about 2.5 weight % K.sub.2 O, from about 52 to about 62 weight % SiO.sub.2, from about 12 to about 16 weight % Al.sub.2 O.sub.3, and from about 9 to about 16 weight % B.sub.2 O.sub.3.
Dependencies are inferred from the claim text.