Thermal shock resistant ceramic composites
AssigneeStanton Advanced Ceramics, Inc.
InventorsKarl-Heinz Schofalvi, Gerald C. Dodds
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Abstract
The disclosed invention relates to a ceramic composite, comprising: reinforcement fibers, the reinforcement fibers comprising alumina, zirconia or magnesium silicate; the reinforcement fibers containing microcracking; and deposits derived from a sol comprising alumina or zirconia and optionally a rare earth oxide reacted with the reinforcement fibers. A process for making the composite is also disclosed.
Claims18
A ceramic composite, comprising:
- reinforcement fibers, the reinforcement fibers comprising alumina, zirconia or magnesium silicate;
- the reinforcement fibers containing microcracking;
- and deposits derived from a sol comprising alumina or zirconia and optionally a rare earth oxide reacted with the reinforcement fibers.
A refractory brick, refractory liner, panel or insulating material comprising a ceramic composite, the ceramic composite, comprising:
- reinforcement fibers, the reinforcement fibers comprising alumina, zirconia or magnesium silicate;
- the reinforcement fibers containing microgracking;
- and deposits derived from a sol comprising alumina or zirconia and optionally a rare earth oxide reacted with the reinforcement fibers.
A ceramic composite able to withstand temperatures in excess of about 2200° F. (1204.4° C.) on a repeated basis without cracking due to thermal shock, the composite being made using a firing step, the composite comprising:
- a web of reinforcement fibers containing microcracking;
- and a matrix formed from an alumina sol, the matrix impregnating the web prior to the firing step, the matrix substantially embedding the web after the firing step.
A ceramic composite able to withstand temperatures in excess of about 2200° F. (1204.4° C.) on a repeated basis without cracking due to thermal shock, the composite being made using a firing step, the composite comprising:
- a web of reinforcement fibers containing microcracking;
- and a matrix formed from an alumina sol, the matrix impregnating the web prior to the firing step, the matrix substantially embedding the web after the firing step, wherein:
- the composite is free of Group I and Group II metals and transition metal oxides.
A refractor brick, comprising:
- a ceramic material able to withstand temperatures in excess of about 2200° F. (1204.4° C.) on a repeated bases without cracking due to thermal shock, the ceramic material comprising a web of reinforcement fibers containing microcracking and an alumina matrix substantially embedding the web.
An insulating material for a fuel cell, comprising:
- a ceramic material able to withstand temperatures in excess of about 2200° F. (1204.4° C.) on a repeated basis without cracking due to thermal shock, the ceramic material comprising a web of reinforcement fibers containing microcracking and an alumina matrix substantially embedding the web, the ceramic material being free of Group I and Group II metals and transition metal oxides.
Dependencies are inferred from the claim text.