The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 23, 1993
Filed:
Apr. 18, 1991
Frederick F Lange, Santa Barbara, CA (US);
Bhaskar V Velamakanni, Woodbury, MN (US);
Regents of the University of California, Oakland, CA (US);
Abstract
A method of preparing dense ceramic product is described, wherein a coagulated network of ceramic powder particles in water is formed and then treated to increase the volume fraction of particles, thereby forming a water-saturated powder compact. The compact is formed into a desired shape and fired to provide the dense ceramic product. A coagulated network may advantageously be formed by mixing a ceramic powder with water at a pH that produces a net surface charge, to form a dispersed slurry and adding a sufficient amount of salt to the dispersed slurry to cause particles within the slurry to form the coagulated network. In view of the unique rheological properties of the powder compacts prepared from coagulated networks of ceramic powder particles, the compact may be processed into complex, near-net-shaped forms by introducing the compact into a mold and subjecting the mold to vibration, whereby the compact adopts the shape of the mold; once removed from the mold, the compact retains its shape without distortion.