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:
Nov. 03, 1992
Filed:
Sep. 08, 1987
David E Clark, Gainesville, FL (US);
Kenneth W Wistrom, Gainesville, FL (US);
University of Florida, Gainesville, FL (US);
Abstract
A method of preparing a composite of a metal oxide matrix with reinforcement particles distributed therein in gel form, by preparing a sol of a metal oxide of Al.sub.2 O.sub.3, SiO.sub.2, MgO, ZrO.sub.2, Y.sub.2 O.sub.3 and mixtures thereof, bringing the sol near the point of gelation, adding reinforcement material consisting of Al.sub.2 O.sub.3, SiC, SiO.sub.2, MgO, ZrO.sub.2, Y.sub.2 O.sub.3 and mixtures thereof in particulate form in an amount from about 5% by volume to about 90% by volume, and adding a control gelling agent in the form of an aqueous solution of a metal salt consisting of aluminum nitrate, magnesium nitrate, zirconium nitrate, chromium nitrate, silicon nitrate, neodymium nitrate and mixtures thereof in an amount corresponding to from about 1% to about 5% by weight of the metal salt based on the metal oxide in the sol to promote controlled gelation.