Kennecott Corporation

Russell D Smith

Richard E Tressler

John D Teneyck

Chhattar S Kucheria

Kurt W Hoff

A two part castable ceramic cement having low density, good thermal shock resistance, good temperature resistance and extended storage life. The first and second parts are mixed together prior to use. The first part is a slurry of solids in water. The solids comprise 0 to 10 weight percent organic fibers, about 35 to about 80 weight percent ceramic organic fibers, about 5 to about 15 weight percent colloidal silica and about 3 to about 10 weight percent organic adhesive. The second part is essentially dry and comprises from about 50 to about 100 weight percent calcium aluminate. The invention further includes a method for forming the cement by mixing the two parts and includes the cast cement resulting from casting and drying the mixed first and second parts.

Two part castable ceramic cement

A method for uniformly coating ceramic fibers comprising from about 40 to 100 weight percent aluminum oxide with Cr.sub.2 O.sub.3. The method comprises precipitating Cr.sub.2 O.sub.3.xH.sub.2 O (chromium oxide hydrate) upon the fibers followed by converting the Cr.sub.2 O.sub.3.xH.sub.2 O to Cr.sub.2 O.sub.3. The resulting Cr.sub.2 O.sub.3 coated fibers have good shrinkage resistance, good temperature resistance and good flexibility in thick fiber articles.

Method for coating alumina containing refractory fibers with chromium

A ceramic fiber and a shrink resistant article manufactured therefrom. The fiber comprises at least 80 weight percent of a refractory compound selected from the group consisting of silica, alumina, aluminum silicate, titania, zirconia, zirconium silicate and mixtures thereof and which comprises less than 5 combined weight percent of alkali or alkaline metal oxide or alkali or alkaline metal silicate. The fiber is uniformly coated with from about 0.01 to about 5 weight percent of Cr.sub.2 O.sub.3.

Method for producing chromium oxide coated refractory fibers

There is disclosed a fire-resistant seal for sealing around a member passing through a fire-resistant building divider. The seal is formed of an adhesive fire-resistant cement on at least one side generally in the plane of the divider surface, behind the adhesive cement is placed bulk ceramic fiber. The second surface of the seal may be covered with an adhesive cement.

Growing community of inventors

Grand Island, NY, United States of America

Russell D Smith