Method for preparing shaped, green ceramic compacts

Details Method for preparing shaped, green ceramic compacts Method for preparing shaped, green ceramic compacts

C - Chemistry, Metallurgy

04

B

25/131

C04B 35/64 (2006.01) C04B 35/113 (2006.01) C04B 35/634 (2006.01)

Patent

CA 1067682

METHOD FOR PREPARING SHAPED, GREEN CERAMIC COMPACTS ABSTRACT OF THE DISCLOSURE A method for preparing shaped, green ceramic compacts suitable for firing to form high density .beta."- alumina containing ceramic bodies comprising: (1) mixing between about 2.5 parts by weight and about 4.5 parts by weight of a ceramic composition comprising at least about 80 weight percent of aluminum oxide and from about 5 to about 15 weight percent of sodium oxide with 1 part by weight of a binder composition comprising between about 20 weight percent and about 35 weight percent of polyvinyl pyrrolidone having a number average molecular weight (?n) between about 20,000 and about 160,000 and between about 80 weight percent and about 65 weight percent of ethylene glycol; (2) extruding the mixture so formed through a die of desired configuration; and (3) heating the extrudate at temperatures and for periods of time necessary to evaporate the ethylene glycol solvent and burn off the polyvinyl pyrrolidone. - 1 -

244559

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