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Process for slip casting textured tubular structures

United States Patent

January 1, 2002
View the Complete Patent at the US Patent & Trademark Office
A process for centrifugal slip casting a textured hollow tube. A slip made up of a carrier fluid and a suspended powder is introduced into a porous mold which is rotated at a speed sufficient to create a centrifugal force that forces the slip radially outward toward the inner surface of the mold. The suspended powder, which is formed of particles having large dimensional aspect ratios such as particles of superconductive BSCCO, settles in a textured fashion radially outward toward the mold surface. The carrier fluid of the slip passes by capillary action radially outward around the settled particles and into the absorbent mold. A layer of mold release material is preferably centrifugally slip cast to cover the mold inner surface prior to the introduction of the BSCCO slip, and the mold release layer facilitates removal of the BSCCO greenbody from the mold without fracturing.
Steinlage; Greg A. (West Lafayette, IN), Trumble; Kevin P. (West Lafayette, IN), Bowman; Keith J. (West Lafayette, IN)
Purdue Research Foundation (West Lafayette, IN)
09/ 438,011
November 10, 1999
This invention was made with Government support under Grant #DE-FG02-90ER45427 awarded by the Department of Energy. The Government has certain rights in the invention.