Abstract:

 (La_0.8Sr_0.2)_0.9MnO_3-δ (LSM) powders were successfully synthesized via a gel-casting technique and traditional solid state reaction method by using oxide and carbon as raw materials. The perovskite phase formation temperature of LSM powders synthesized by the gel-casting technique was about 850℃, which is nearly 150℃ lower than that of LSM powders synthesized by the conventional solid-state reaction route. The significantly reduced phase formation temperature of the gel-casting LSM powder was most likely due to the homogeneously distributed and immobilized precursor particles in a polymeric network, which promoted the sintering and crystallization process. Furthermore, the electrochemical catalytic performance of LSM electrodes prepared by LSM powders synthesized gel-casting technique and sintered at different temperature was also investigated in detail.

Key words: , gel-casting, solid state reaction, solid oxide fuel cell,  , (La_0.8Sr_0.2)_0.9MnO_3-&delta