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

Abstract

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 Cr 2 O 3 ‐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.