authors |
Reddy, AA; Tulyaganov, DU; Pascual, MJ; Kharton, VV; Tsipis, EV; Kolotygin, VA; Ferreira, JMF |
nationality |
International |
journal |
FUEL CELLS |
author keywords |
Coefficient of Thermal Expansion; Electrolyte; Interconnect; Sealing; Solid Oxide Fuel Cells |
keywords |
TRANSPORT-PROPERTIES; SEALING GLASS; ELECTROLYTES; INTERCONNECT; COMPOSITE; STRENGTH; ZIRCONIA |
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. |
publisher |
WILEY-V C H VERLAG GMBH |
issn |
1615-6846 |
year published |
2013 |
volume |
13 |
issue |
5 |
beginning page |
689 |
ending page |
694 |
digital object identifier (doi) |
10.1002/fuce.201200237 |
web of science category |
Electrochemistry; Energy & Fuels |
subject category |
Electrochemistry; Energy & Fuels |
unique article identifier |
WOS:000328132700005
|
file |
fuel_cells_2013_.pdf
|