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|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.
|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.|
|Appears in Collections:||CICECO - Artigos|
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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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