Abstract
The effect of processing conditions of high rotation shearing mixer on the properties of composite cathode materials of SOFC was investigated. Morphology, BET specific surface area and particle size were evaluated for the processed composite powders. The electrochemical properties and microstructure of the cathode electrode made by the composite powders were also evaluated. As a result, smaller bulk resistance and interfacial resistance were obtained than those of cathodes made by simple mixing. Both resistances were smaller as BET specific surface area of the processed powder became smaller. It was discussed that smaller BET surface area led to better organized network structure in the cathode. However, the shearing mixer used in this paper was less effective for obtaining smaller BET surface area of composite powders compared to that made by vertical axis shearing mixer already reported by the authors.
