Sealing materials and devices utilizing such materials

Details Sealing materials and devices utilizing such materials Sealing materials and devices utilizing such materials

2007-03-13

2007-03-13

Sample, David (Department: 1755)

Chemistry: electrical current producing apparatus, product, and

With pressure equalizing means for liquid immersion operation

C501S017000, C501S018000, C501S021000, C501S032000, C501S068000, C501S069000, C501S072000

Reexamination Certificate

active

11038921

ABSTRACT:
A solid oxide fuel cell device incorporates a sealing material resistant to hydrogen gas permeation at a sealing temperature in the intermediate temperature range of 600° C.–800° C., the seal having a CTE in the 100×10−7/° C. to 120×10−7/° C., wherein the sealing material comprises in weight %, of: (i) a 80 to 95 wt % of glass frit, the glass frit itself having a composition in mole percent of: SiO270–85%; Al2O30–5%; Na2O30–8%; K2O 10–25%; ZnO 0–10%; ZrO20–6%; MgO 0–7%; TiO20–2%; and (ii) and 5 wt % to 25 wt % of addition comprising at least one of: alumina, zirconia or leucite.

REFERENCES:
patent: 4946622 (1990-08-01), Kiss et al.
patent: 5273837 (1993-12-01), Aitken et al.
patent: 5308803 (1994-05-01), Clifford et al.
patent: 6291092 (2001-09-01), Kohli et al.
patent: 2005/0277541 (2005-12-01), Yoshii et al.
patent: 2001319670 (2001-11-01), None
patent: WO2003/007400 (2003-01-01), None
patent: WO2004/031088 (2004-04-01), None

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