Diopside - Mg orthosilicate and diopside - Ba disilicate glass-ceramics for sealing applications in SOFC: Sintering and chemical interactions studies

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abstract

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.

keywords

OXIDE FUEL-CELLS; PHYSICAL-PROPERTIES; RO-BAO-SIO2 R; SEALANTS; SYSTEM; CRYSTALLIZATION; BEHAVIOR; MICROSTRUCTURE; INTERCONNECTS; FORSTERITE

subject category

Chemistry; Electrochemistry; Energy & Fuels

authors

Reddy, AA; Tulyaganov, DU; Goel, A; Pascual, MJ; Kharton, VV; Tsipis, EV; Ferreira, JMF

our authors

foto Allu Amarnath Reddy

Allu Amarnath Reddy

PhD Student
foto José Maria da Fonte Ferreira

José Maria da Fonte Ferreira

Retired Professor
foto Vladislav Kharton

Vladislav Kharton

Invited Principal Researcher

Groups

G5 - Biomimetic, Biological and Living Materials

Projects

Self healing glass-ceramic seals for solid oxide fuel cells: A multi-layered approach (PTDC/CTM-CER/114209/2009)

acknowledgements

This study was financially supported by the University of Aveiro, CICECO, and FCT, Portugal (PTDC/CTM-CER/114209/2009).

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Publication Details

type
Journal Article
year
2012
journal
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
volume
37
publisher
PERGAMON-ELSEVIER SCIENCE LTD
issn
0360-3199
issue
17
digital object identifier
10.1016/j.ijhydene.2012.05.130
web of science article identifier
WOS:000309024700055

Journal Metrics (JCR 2019)

Journal Impact Factor
4.939
Journal Impact Factor (5 yrs)
4.469
category normalized journal percentile
73.237

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