Tape Casting and Sintering of Strontium-Doped Lanthanum Chromite for a Planar Solid Oxide Fuel Cell Bipolar Plate

Nonagglomerated strontium‐doped lanthanum chromite powders were prepared by a modified Pechini resinintermediate process and tape cast to form bipolar plates for a planar solid oxide fuel cell. An air‐sintering technique for the strontium‐doped lanthanum chromite was developed, which involved placing the green tape between Cr2O3‐fired plates. The sintering process was found to be diffusion controlled, with densification beginning at the surface and proceeding to the interior. A bipolar plate of 2‐mm thickness was fired to more than 93.5% theoretical density when fired at 1670°C for 7 h.