Abrasive grits formed of ceramic containing oxides of...

Details Abrasive grits formed of ceramic containing oxides of... Abrasive grits formed of ceramic containing oxides of...

C - Chemistry, Metallurgy

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C04B 35/10 (2006.01) C01F 7/02 (2006.01) C04B 35/111 (2006.01) C09K 3/14 (2006.01)

Patent

CA 1335627

Ceramic abrasive grits comprising alpha alumina and at least about 0.5 percent by weight rare earth metal oxide are prepared by combining alumina hydrate and rare earth metal oxide or its precursors to produce a blend, drying the blend to produce a dried solid, crushing the dried solid to produce grits, calcining the dried grits to substantially remove bound volatile materials, and firing the grits to produce a ceramic material. The rare earth metal is selected from the group consisting of praseodymium, samarium, ytterbium, neodymium, lanthanum, gadolinium, cerium, dysprosium, erbium, and mixtures of one or more rare earth metal.

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