Low alkali sealing frits, and seals and devices utilizing...

Details Low alkali sealing frits, and seals and devices utilizing... Low alkali sealing frits, and seals and devices utilizing...

2007-05-08

2007-05-08

Sample, David (Department: 1755)

Chemistry: electrical current producing apparatus, product, and

With pressure equalizing means for liquid immersion operation

C501S015000, C501S017000, C501S018000, C501S021000, C501S065000, C501S066000, C501S068000, C501S069000, C501S070000, C501S072000, C501S077000

Reexamination Certificate

active

11051202

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.–900° 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 wt % to 100 wt % glass frit, the glass frit itself having a composition comprising in mole percent of: SiO215–65; Li2O 0–5; Na2O 0–5; K2O 0–10; MgO 0–5; CaO 0–32; Al2O30–10; B2O30–50; SrO 0 to 25, wherein the total amount of alkalis is less than 10 mole %; and(ii) zirconia or leucite addition 0 wt % to 30 wt.

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