Low-temperature sintering of lanthanum strontium manganite-based contact pastes for SOFCs

B. P. McCarthy, L. R. Pederson, Y. S. Chou, X. D. Zhou, W. A. Surdoval, L. C. Wilson

Research output: Contribution to journalArticle

35 Citations (Scopus)

Abstract

Electrical contact pastes of composition (La0.90Sr0.10)0.98MnO3 + δ (LSM-10) formed strong bonds (∼3 MPa) to (Co,Mn)3O4 spinel-coated Crofer 22 APU ferritic steel coupons when exposed to alternating flows of air and nitrogen (10 ppm O2) at 900 °C for 2 h or longer. When held at 900 °C in air only, bond strengths were negligible. Substantial bonds could also be created between LSM-10 contact paste and (La0.80Sr0.20)0.98MnO3 + δ (LSM-20) porous cathodes by processing in alternating air and nitrogen, without simultaneous densification of the cathode. Enhanced sintering of LSM-10 is attributed to transients in the defect structure induced by oxygen partial pressure changes.

Original languageEnglish
Pages (from-to)294-300
Number of pages7
JournalJournal of Power Sources
Volume180
Issue number1
DOIs
Publication statusPublished - 15 May 2008
Externally publishedYes

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Keywords

  • Contact paste
  • Enhanced shrinkage
  • Lanthanum strontium manganite
  • Oxygen partial pressure cycling
  • Sintering
  • Solid oxide fuel cell

ASJC Scopus subject areas

  • Electrochemistry
  • Fuel Technology
  • Materials Chemistry
  • Energy (miscellaneous)

Cite this

McCarthy, B. P., Pederson, L. R., Chou, Y. S., Zhou, X. D., Surdoval, W. A., & Wilson, L. C. (2008). Low-temperature sintering of lanthanum strontium manganite-based contact pastes for SOFCs. Journal of Power Sources, 180(1), 294-300. https://doi.org/10.1016/j.jpowsour.2008.01.097