Improved abrasives by concurrent fire-comminuting and...

Details Improved abrasives by concurrent fire-comminuting and... Improved abrasives by concurrent fire-comminuting and...

C - Chemistry, Metallurgy

09

K

C09K 3/14 (2006.01) C04B 35/111 (2006.01) C04B 35/624 (2006.01)

Patent

CA 2212508

Sol-gel alumina that is dried but unfired can be explosively comminuted by feeding the dried gel into a furnace held at temperatures above those at which vaporizable materials are eliminated from the particles of gel. At suitably elevated temperatures the firing is sufficient to form fully densified alpha alumina particles of a size suitable for direct use as abrasive grits.

Du sol-gel d'alumine séché mais non cuit peut être fragmenté par explosion si on le place dans un four dont la température est maintenue au-dessus des températures auxquelles les matières vaporisables sont éliminées des particules de gel. Lorsque la température est élevée à un degré adéquat, la cuisson est suffisante pour former des particules d'alumine alpha entièrement densifiées dont la taille convient à l'utilisation directe comme grains abrasifs.

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