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Barium Borosilicate Sealing Glasses Synthesized by a Sol-Gel Process: Chemical Interactions with a Stainless Steel and Gas-Tightness of a SOFC

Puig, Jean and Ansart, Florence and Lenormand, Pascal and Bailly, Nicolas and Georges, Samuel and Dailly, Julian Barium Borosilicate Sealing Glasses Synthesized by a Sol-Gel Process: Chemical Interactions with a Stainless Steel and Gas-Tightness of a SOFC. (2014) Fuel Cells, 14 (6). 1014-1021. ISSN 1615-6846

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Official URL: https://doi.org/10.1002/fuce.201300289

Abstract

Abstract Several glasses synthesized by sol-gel route and based on the BaO-B2O3-X-Al2O3-SiO2 (X=CaO, MgO) glass system have been investigated to evaluate their applicability as sealant for solid oxide fuel cell (SOFC). Chemical interactions with K41X stainless steel and hydrogen-tightness of these materials were evaluated after operations at high temperatures over 1,000h in air atmosphere. Formation of a new phase at the steel?glass interface and formation of porosity in the glass were observed and determined as critical problems over mid-term operations. The role of MgO is important to obtain a gas-tight sealing. Application of the glass paste without binder addition was performed in order to avoid possible residual porosity related problems. The best glass was finally used as sealant between anodic and cathodic compartments in complete SOFCs operated at 760 and at 800°C. Open circuit voltages and power densities of the cells were recorded during the first hours of operation.

Item Type:Article
HAL Id:hal-01999471
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Other partners > EDF (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT (FRANCE)
Other partners > Institut polytechnique de Grenoble (FRANCE)
Other partners > Université Grenoble Alpes - UGA (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UPS (FRANCE)
Other partners > Universität Karlsruhe (GERMANY)
Other partners > Université Joseph Fourier Grenoble 1 - UJF (FRANCE)
Other partners > Université de Savoie Mont Blanc - USMB (FRANCE)
Laboratory name:
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Deposited By: Yves MOMBOISSE
Deposited On:30 Jan 2019 09:16

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