Thermal shock resistant ceramic composites

Details Thermal shock resistant ceramic composites Thermal shock resistant ceramic composites

2006-07-25

2006-07-25

Dixon, Merrick (Department: 1774)

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Including a second component containing structurally defined...

C428S698000

Reexamination Certificate

active

07081294

ABSTRACT:
A ceramic composite is able to whithstand temperatures in excess of 2200 F on a repeated basis without cracking due to thermal shock. The composite has a web of reinforcement fibers; and a matrix that substantially the web after the firing step. The matrix is formed around the web by impregnating the web with a sol containing alumina and, in some cases, rare earth oxides, and firing the composite after the impregnation. The web may be a three-dimensional orthogonal weave of the reinforcement fibers, where the fibers are a transitional phase alumina. The composite is essentially free of Group I and Group II metals and transition metal oxides. The composite may be used as a refractory brick or lining and may also be used as an insulatingmaterial due to its chemically non-reactive nature.

REFERENCES:
patent: 5006423 (1991-04-01), Draskovich
patent: 5609741 (1997-03-01), Illston et al.
patent: 5635454 (1997-06-01), Baker et al.
patent: 5656217 (1997-08-01), Rogers et al.

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