Inventors:
Cathryn A. Sundback - Harvard MA
Bruce E. Novich - Lexington MA
Angelica E. Karas - New Brunswick NJ
Richard W. Adams - Marlborough MA
Assignee:
Ceramics Process Systems Corporation - Milford MA
International Classification:
C04B 4192
Abstract:
A process for forming articles from inorganic sinterable particulates includes providing a well-dispersed, low pressure injectable slurry, freeze-forming the slurry into a desired geometry, and drying the piece so formed by a predominantly sublimative process, to produce a green article that can be conventionally sintered. The vehicle has a volume change on freezing of not more than. +-. 10% by volume; to further control the volume change on freezing, an emulsion derived from different vehicles can be tailored. The slurries preferably have a solids content of at least about 35 v/o, a viscosity of preferably not more than about 1000 cP at 100 s. sup. -1, and are preferably injectable at not more than about 1000 psi, usually at less than 100 psi.