Please use this identifier to cite or link to this item:
http://hdl.handle.net/10773/20878
Title: | SrO-Containing Diopside Glass-Ceramic Sealants for Solid Oxide Fuel Cells: Mechanical Reliability and Thermal Shock Resistance |
Author: | Reddy, A. A. Tulyaganov, D. U. Pascual, M. J. Kharton, V. V. Tsipis, E. V. Kolotygin, V. A. Ferreira, J. M. F. |
Keywords: | TRANSPORT-PROPERTIES SEALING GLASS ELECTROLYTES INTERCONNECT COMPOSITE STRENGTH ZIRCONIA |
Issue Date: | 2013 |
Publisher: | WILEY-V C H VERLAG GMBH |
Abstract: | A series of glasses and glass-ceramics (GCs) aiming at applications as sealants for solid oxide fuel cells (SOFCs) were synthesized by partial substitution of Ca for Sr in the diopside-Ba disilicate composition. X-ray diffraction in conjunction with the Rietveld-RIR technique were employed to quantify the crystalline (diopside and Sr-diopside) and amorphous phases in the glasses sintered/heat treated at 850 degrees C in humidified 10%H-2-90%N-2 gas mixture for 250h. Weibull modulus varied in the range 11.6-34.4 implying toward good mechanical reliability of synthesized GCs. Thermal shock resistance of model electrochemical cells made of yttria-stabilized zirconia, gadolinia-doped ceria, and lanthanum gallate based solid electrolytes, hermetically sealed by one diopside-based composition, was evaluated employing quenching from 800 degrees C in air and water. Suitable thermal expansion coefficient, mechanical reliability, and strong adhesion to stabilized zirconia and metallic interconnects, are all suggesting a good suitability of the sealants for SOFC applications. |
Peer review: | yes |
URI: | http://hdl.handle.net/10773/20878 |
DOI: | 10.1002/fuce.201200237 |
ISSN: | 1615-6846 |
Publisher Version: | 10.1002/fuce.201200237 |
Appears in Collections: | CICECO - Artigos |
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File | Description | Size | Format | |
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SrO-Containing Diopside Glass-Ceramic Sealants for Solid Oxide Fuel Cells Mechanical Reliability and Thermal Shock Resistance_10.1002fuce.201200237.pdf | 423.61 kB | Adobe PDF |
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