Process for casting ceramic materials

Details Process for casting ceramic materials Process for casting ceramic materials

2005-02-22

2005-02-22

Chin, Peter (Department: 1731)

Plastic and nonmetallic article shaping or treating: processes

Outside of mold sintering or vitrifying of shaped inorganic...

Utilizing binder to add green strength to preform

C264S234000, C264S635000

Reexamination Certificate

active

06858174

ABSTRACT:
A process for producing ceramic, or ceramic composite, components having microfeatures by creating a chemical reaction in a castable slurry to bond nano-sized or submicron-sized ceramic powders. The bonding process that gives coherency and strength to the material creates a reaction product or gel-phase resulting from a chemical reaction between the ceramic powder and a reagent, such as an acid, alkali, or inorganic salt solution, that binds the ceramic powder. This gel-phase can be de-hydrated, cured, or crystallized by a higher-temperature firing step, but at a temperature lower than the temperature range at which sintering starts to occur in the ceramic (typically lower than 1,000°C.)

REFERENCES:
patent: 4574063 (1986-03-01), Scherer
patent: 4639388 (1987-01-01), Ainsworth et al.
patent: 5858313 (1999-01-01), Park et al.
patent: 6284682 (2001-09-01), Troczynski et al.
patent: 6660192 (2003-12-01), Kim et al.

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