Glass-ceramic joining material and method of joining

Details Glass-ceramic joining material and method of joining Glass-ceramic joining material and method of joining

C - Chemistry, Metallurgy

04

B

C04B 37/00 (2006.01) C03C 10/00 (2006.01) G01N 27/28 (2006.01) G01N 27/407 (2006.01) H01M 2/08 (2006.01) H01M 8/02 (2006.01) H01M 8/12 (2006.01)

Patent

CA 2380101

The present invention is a glass-ceramic material and method of making useful for joining a solid ceramic component and at least one other solid component. The material is a blend of M1-M2-M3, wherein M1 is BaO, SrO, CaO, MgO, or combinations thereof, M2 is Al2O3, present in the blend in an amount from 2 to 15 mol%, M3 is SiO2 with up to 50 mol% B2O3 that substantially matches a coefficient of thermal expansion of the solid electrolyte. According to the present invention, a series of glass ceramics in the M1-Al2O3-M3 system can be used to join or seal both tubular and planar solid oxide fuel cells, oxygen electrolyzers, and membrane reactors for the production of syngas, commodity chemicals and other products.

L'invention concerne un composite à matrice vitrocéramique et son procédé de fabrication, qui permet de joindre un composant céramique solide et au moins un autre composant solide. Le matériau est un mélange de M1-M2-M3, M1 représentant BaO, SrO, CaO, MgO ou des combinaisons de ceux-ci. M2 est Al2O3, présent dans le mélange dans une proportion allant de 2 à 15 mol %; M3 représente SiO2 avec jusqu'à 50 mol % de B2O3 correspondant sensiblement à un coefficient de dilatation thermique de l'électrolyte solide. Selon l'invention, une série de vitrocéramiques dans le système M1-Al2O3-M3 peut être utilisée pour joindre ou sceller des piles à combustible à oxyde solide tubulaires et plates, des électrolyseurs à oxygène et des réacteurs à membrane pour la production notamment de gaz de synthèse et de produits chimiques.

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