Yoshio D Ichikawa

US Patent:

45043175, Mar 12, 1985

Filed:

Mar 7, 1983

Appl. No.:

6/472526

Inventors:

Eugene E. Smeltzer - Export PA
Yoshio Ichikawa - Pittsburgh PA
George N. Schneider - North Huntingdon PA

Assignee:

Westinghouse Electric Corp. - Pittsburgh PA

International Classification:

C04B 735

US Classification:

106 90

Abstract:

Disclosed is a process for encapsulating in cement a boric acid slurry which is at least about 30% boric acid. To the sulrry is added about 3. 5 to about 4. 5% dispersing agent, about 0. 02 to about 0. 03 ml/g of a cement retarder, up to about 0. 4% of a hardener, and sufficient cement to bring the weight ratio of water to cement to about 0. 4 to about 0. 6. Also disclosed is a cement composition produced by said method.

US Patent:

44143370, Nov 8, 1983

Filed:

May 19, 1982

Appl. No.:

6/379813

Inventors:

Yoshio Ichikawa - Pittsburgh PA
George M. Halgas - Monroeville PA

Assignee:

Westinghouse Electric Corp. - Pittsburgh PA

International Classification:

C04B 3548

US Classification:

501103

Abstract:

A composition is disclosed of about 0. 45 to about 5. 5 percent of an organic water-soluble binder which has a thermal decomposition temperature of about 100 to about 500. degree. C. and a viscosity of less than about 10,000 poises at 20. degree. C. , about 1. 5 to about 4. 0 percent of a starch which has a thermal decomposition temperature of about 250 to about 535. degree. C. where the thermal decomposition temperature of the binder and the starch are at least about 50. degree. C. apart, about 1. 5 to about 3. 5 percent cellulose, about 0. 5 to about 2. 0 percent of a dispersant, and about 7 to about 11 percent water, and about 75 to about 89 percent of a high temperature refractory material such as stabilized zirconia. The composition is de-aired, formed into a shape, and fired to produce a ceramic structure.