resumo
Diopside (CaMgSi2O6) based glasses compositions containing magnesium orthosilicate or barium aluminosilicates phases have been appraised for sealing applications in solid oxide fuel cells (SOFCs) and other solid-electrolyte devices. The sintering behavior and crystalline phase evolution of glass powders has been investigated under isothermal and non-isothermal conditions in the SOFC operating temperature range (800-900 degrees C). All the glass compositions exhibited two-stage shrinkage behavior resulting in well sintered and mechanically strong glass-ceramics with Augite as the primary crystalline phase. The appropriate coefficient of thermal expansion (CTE), long term thermal stability (300 h at 900 degrees C), high electrical resistivity, good adhesion and minimal reactivity with SOFC components makes the investigated glass-ceramics potential candidates for further experimentation as SOFC sealants. Copyright (C) 2012, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
palavras-chave
OXIDE FUEL-CELLS; PHYSICAL-PROPERTIES; RO-BAO-SIO2 R; SEALANTS; SYSTEM; CRYSTALLIZATION; BEHAVIOR; MICROSTRUCTURE; INTERCONNECTS; FORSTERITE
categoria
Chemistry; Electrochemistry; Energy & Fuels
autores
Reddy, AA; Tulyaganov, DU; Goel, A; Pascual, MJ; Kharton, VV; Tsipis, EV; Ferreira, JMF
nossos autores
Allu Amarnath Reddy
Estudante de doutoramento
José Maria da Fonte Ferreira
Professor(a) Jubilado(a)
Vladislav Kharton
Investigador Principal Covidadoagradecimentos
This study was financially supported by the University of Aveiro, CICECO, and FCT, Portugal (PTDC/CTM-CER/114209/2009).