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Method of producing fuel cells with solid electrolytes and ceramic oxide electrode layers

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1. METHOD OF PRODUCING FUEL CELLS CONSISTING OF SOLID ELECTROLYTE AND CERAMIC OXIDE ELECTRODE LAYERS, WHICH COMPRISES SIMULTANEOUSLY SINTERING A CERAMIC ELECTRONCONDUCTING OXIDE ANODE LAYER AND A CERAMIC ELECTRONCONDUCTING OXIDE CATHODE LAYER TO A SOLID OXYGEN-ION CONDUCTING ELECTROLYTE IN THE SAME ATMOSPHERE OF LOW PARTIAL PRESSURE OF OXYGEN, SAID SINTERING BEING CARRIED OUT AT A TEMPERATURE OF BETWEEN 1700* AND 1900*C. WHILE THE PARTIAL PRESSURE OF OXYGEN, AT LEAST DURING THE LAST PART OF THE PROCESS, DOES NOT INCREASE TO MORE THAN ABOUT 10**-3 ATMOSPHERES, AND THE ATMOSPHERE, AT LEAST DURING THE LAST PHASE OF SINTERING, CONSISTING OF A GAS WITH VOLUME RATIO OF CARBON DIOXIDE PLUS STEAM TO CARBON MONOXIDE PLUS HYDROGEN OF ABOUT 4-20 AND ANY ADMIXTURE OF INERT GAS.
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