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THIN, FINE GRAINED AND FULLY DENSE GLASS-CERAMIC SEAL FOR SOFC STACK
The invention relates to a thin, fine grained and fully dense glass-ceramic seal for sofc stack. A solid oxide ceramic includes a substrate defining a surface, the substrate including at least one material selected from the group consisting of yttria-stabilized zirconia (YSZ), lanthanum strontium titanate (LST), lanthanum strontium manganite (LSM), and nickel oxide-YSZ composite. The solid oxide ceramic further includes a seal coating at least a portion of the surface, the seal including a Sanbornite (BaO.2SiO2) crystal phase, a Hexacelsian (BaO.Al2O3.2SiO2) crystal phase, and a residual glass phase, wherein the seal has a coefficient of thermal expansion equal to or less than that of the substrate at said surface. The glass composition can have a difference between a glass crystallization temperature and a glass transition temperature in a range of between about 200 DEG C. and about 400 DEG C. at a heating rate of about 20 DEG C./min.
THIN, FINE GRAINED AND FULLY DENSE GLASS-CERAMIC SEAL FOR SOFC STACK
The invention relates to a thin, fine grained and fully dense glass-ceramic seal for sofc stack. A solid oxide ceramic includes a substrate defining a surface, the substrate including at least one material selected from the group consisting of yttria-stabilized zirconia (YSZ), lanthanum strontium titanate (LST), lanthanum strontium manganite (LSM), and nickel oxide-YSZ composite. The solid oxide ceramic further includes a seal coating at least a portion of the surface, the seal including a Sanbornite (BaO.2SiO2) crystal phase, a Hexacelsian (BaO.Al2O3.2SiO2) crystal phase, and a residual glass phase, wherein the seal has a coefficient of thermal expansion equal to or less than that of the substrate at said surface. The glass composition can have a difference between a glass crystallization temperature and a glass transition temperature in a range of between about 200 DEG C. and about 400 DEG C. at a heating rate of about 20 DEG C./min.
THIN, FINE GRAINED AND FULLY DENSE GLASS-CERAMIC SEAL FOR SOFC STACK
PARIHAR SHAILENDRA S (author) / QUEREL GILLES (author) / GICH MARTI (author)
2015-12-23
Patent
Electronic Resource
English
IPC:
C03C
Chemische Zusammensetzungen für Gläser, Glasuren oder Emails
,
CHEMICAL COMPOSITION OF GLASSES, GLAZES, OR VITREOUS ENAMELS
/
C04B
Kalk
,
LIME
/
H01M
Verfahren oder Mittel, z.B. Batterien, für die direkte Umwandlung von chemischer in elektrische Energie
,
PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
THIN, FINE GRAINED AND FULLY DENSE GLASS-CERAMIC SEAL FOR SOFC STACK
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