MATERIAL FOR INTERCONNECTOR OF SOLID ELECTROLYTE FUEL CELL, ITS SYNTHESIZING METHOD, AND METHOD FOR FORMING INTERCONNECTOR ON FUEL POLE OF CYLINDRICAL SOLID ELECTROLYTE FUEL CELL

摘要

PURPOSE:To synthesize a material for interconnectors to produce interconnectors which can be co-sintered with fuel cell electrodes, has excellent density, high electron conductivity and excellent chemical stability in an oxidation-reduction atmosphere, and to produce an interconnector film at a low production cost so that the film is used as an electrode (fuel pole) of a cylindrical solid electrolyte fuel cell. CONSTITUTION:La, Ca and Cr are used as the essential source material and mixed by molar ratio of La:Ca:Cr=(1-x):x:(1+y) satisfying 0x=0.4, 0y=0.05. Calcium-doped lanthanum chromite powder is synthesized by citrate method. A supporting tube for fuel pole which is preliminarily formed and calcined is dipped in a slurry obtd. from the calcium-doped lanthanum chromite powder to deposit the slurry on the tube. Then the tube with slurry is cosintered to form a dense interconnector film on the fuel pole.