C - Chemistry – Metallurgy – 04 – B
Patent
C - Chemistry, Metallurgy
04
B
C04B 35/10 (2006.01) B24D 3/00 (2006.01) B24D 3/06 (2006.01) B24D 3/14 (2006.01) B24D 11/00 (2006.01) B24D 18/00 (2006.01) C04B 35/111 (2006.01) C04B 35/626 (2006.01) C09K 3/14 (2006.01) C04B 35/60 (1990.01)
Patent
CA 2137667
A method of making abrasive particles having a specified shape and abrasive articles containing abrasive particles having a specified shape. The method for preparing such an abrasive particle comprises the steps of: (a) providing a dispersion contain- ing particles of a precursor of alpha alumina, preferably particles of alpha alumina monohydrate, in a liquid, which liquid com- prises a volatile component; (b) providing a mold having a first surface and a second surface opposed to said first surface, said first surface having an opening to a mold cavity having a specified shape; (c) introducing the dispersion into said mold cavity; (d) removing a sufficient portion of the volatile component of the liquid from the dispersion while the dispersion is in the mold cavity, to form a precursor of an abrasive particle having approximately the same shape as the shape of the recess of the mold cavity; (e) removing the precursor of the abrasive particle from the recess of the mold; (f) calcining the removed precursor of the abrasive particle; and (g) sintering the calcined precursor to form the desired abrasive particle.
Berg James G.
Berg Todd A.
Leonard William K.
Rowenhorst Donley D.
Minnesota Mining And Manufacturing Company
Smart & Biggar
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