Sealing materials and devices utilizing such materials

H - Electricity – 01 – M

Patent

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H01M 2/08 (2006.01) C03C 8/02 (2006.01) C03C 8/04 (2006.01) C03C 8/16 (2006.01) C03C 8/20 (2006.01) C03C 8/24 (2006.01)

Patent

CA 2593765

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 100x10-7 /~C to 120x10-7/~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 : SiO2 70-85%; Al2O30-5%; Na2O3 0-8%; K2O 10-25%; ZnO 0-10%; ZrO2 0-6%; MgO 0-7%; TiO2 0-2%; and (ii) and 5wt % to 25wt% of addition comprising at least one of: alumina, zirconia or leucite.

L'invention concerne une pile à combustible à oxyde solide dans laquelle est utilisé un matériau de scellement résistant au passage du gaz hydrogène à une température de scellement comprise dans la plage de température intermédiaire comprise entre 600 °C et 800 °C, le matériau possédant un coefficient de dilatation thermique compris entre 100x10-7 / °C et 120x10-7/ °C. Le matériau de scellement comprend : (i) 80 à 95 % en poids de fritte de verre, la fritte de verre renfermant elle-même 70-85 % de SiO2, 0-5 % d'Al2O3, 0-8 % de Na2O3, 10-25 % de K2O, 0-10 % de ZnO, 0-6 % de ZrO2, 0-7 % de MgO et 0-2 % de TiO2 ; et (ii) 5 à 25 % en poids d'un produit d'addition renfermant au moins un des éléments sélectionnés dans le groupe comprenant de l'alumine, de la zircone ou de la leucite.

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