Sealing material
AssigneeFlexitallic Investments, Inc.
InventorsStuart John Shaw, John Hoyes
Life of this patent
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Abstract
The present invention relates to composite sealing materials for a gasket. The gaskets are useful in solid oxide fuel/electrolyser cells (SOFC and SOEC). The fuel cell gaskets contain sealing material based upon chemically exfoliated vermiculite that has improved corrosion resistance. The sealing material comprises chemically exfoliated vermiculite; filler; and insoluble carbonate.
Claims21
A gasket for sealing two mating surfaces of a solid oxide cell, the gasket comprising a core layer interposed between a first and a second coating layer, wherein the core layer comprises a composite sealing material comprising:
- (a) a chemically exfoliated vermiculite (“CEV”);
- (b) a filler;
- and
- (c) an insoluble carbonate, wherein the insoluble carbonate has a solubility in water of less than 0.1 g/ml at 25° C.;
- wherein the coating layers each comprise glass, glass-ceramic, and/or ceramic material, and wherein the coating layers have a softening temperature in the range of 500° C. to 950° C.
Dependencies are inferred from the claim text.