Electrical contact pastes of composition (La0.90Sr0.10)0.98MnO3+d (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 900oC for 2 hours or longer. When held at 900oC in air only, bond strengths were negligible. Substantial bonds could also be created between LSM-10 contact paste and (La0.80Sr0.20)0.98MnO3+d (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.
Revised: July 16, 2010 |
Published: May 15, 2009
Citation
McCarthy B., L.R. Pederson, Y.S. Chou, X.D. Zhou, W. Surdoval, and L. Wilson. 2009.Low temperature sintering of lanthanum strontium manganite-based contact pastes for SOFCs.Journal of Power Sources 180, no. 1:294-300.PNNL-SA-59150.