METHOD FOR FORMING COATING LAYER OF SOLID OXIDE FUEL CELL SEPARATE PLATE

摘要

A method for forming a coating layer of a separator for a solid oxide fuel cell is provided to improve oxidation resistance and electrical conductivity by coating it without a connecting hole. The method comprises the step of thermal spray coating LSM (LaSrMnO3) or LSCF ((La0.6Sr0.4)(Fe0.8Co0.2)O3) on a substrate by using a theta-gun equipped with an afterburner under the condition of a ratio of oxygen (SCFH)/fuel (GPH) of 220-350, a thermal spray distance of 140-160 mm and an acetylene flux of 20-25 L/min. Preferably the LSM (LaSrMnO3) or LSCF ((La0.6Sr0.4)(Fe0.8Co0.2)O3) has a size of 5-45 micrometers and the formed coating layer has a thickness of 40-150 micrometers.