Doped lanthanum chromite material for bipolar interconnects for solid oxide fuel cells
AssigneeGas Research Institute
InventorsAshok C. Khandkar, Christopher E. Milliken, Singaravelu Elangovan, Joseph J. Hartvigsen
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Abstract
An improved ceramic interconnect component for a solid oxide fuel cell having good electrical conductivity and thermodynamic stability in the presence of fuel and a coefficient of thermal expansion matching closely that of zirconia electrolytes is disclosed. The interconnect is a lanthanum chromite material including strontium and magnesium as dopants.
Claims5
An electroconductive conducting interconnect having a composition with a thermal coefficient of expansion substantially equivalent to zirconia comprising:
- a doped chromite ceramic composition having the formula La.sub.0.99-x Sr.sub.x Cr.sub.1-y Mg.sub.y O.sub.3-.delta., wherein
- x has a value in the range of 0.0<x.ltoreq.0.10;
- y has a value in the range of 0.0<y.ltoreq.0.2 ;
- and
- .delta. has a value in the range of 0.0-0.15.
An electroconductive conducting composition having a thermal coefficient of expansion substantially equivalent to zirconia comprising:
- a doped chromite ceramic composition having the formula La.sub.0.99-x Sr.sub.x Cr.sub.1-y Mg.sub.y O.sub.3-.delta., wherein
- x has a value in the range of 0.0<x.ltoreq.0.10;
- y has a value in the range of 0.0<y.ltoreq.0.2;
- and
- .delta. has a value in the range of 0.0-0.15.
Dependencies are inferred from the claim text.