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Abstract No.: |
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Scheduled at:
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Wednesday, May 22, 2019, Saal Brüssel 3:40 PM Brazing of ceramic and glass
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Title: |
Crystallization processes of BaO-CaO-SiO2-glasses as sealing material for the application in SOCs
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Authors: |
Sonja-Michaela Groß-Barsnick* / Forschungszentrum Jülich GmbH, Germany Jeerawan Brendt / Forschungszentrum Jülich GmbH, Germany Carole Babelot/ Forschungszentrum Jülich GmbH, Germany Ghaleb Natour/ Forschungszentrum Jülich GmbH, Germany
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Abstract: |
For a successful operation of solid oxide cells (SOCs) a robust sealant material that shows a good performance under thermal cycling and last for long-term runs is necessary. The joint needs to be electrically insulating and to have an adapted thermal expansion coefficient as well as mechanical and thermochemical stability. Glass-ceramic sealants can meet most of these requirements. During the joining of the SOFC components, the glass-ceramic sealant partially crystallizes. Due to crystallization the initial glass transforms into a mechanically stronger material. Fast crystallization also leads to a shorter heat treatment of the stack in the start-up time which would be very favorable in terms of industrialization. The standard glass composition of the BaO-CaO-SiO2 system developed at Forschungszentrum Jülich (glass
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