SOLID OXIDE FUEL BATTERY ELECTROLYTE SHEET AND SOLID OXIDE FUEL BATTERY SINGLE CELL EQUIPPED WITH THE SAME, AS WELL AS SOLID OXIDE FUEL BATTERY ELECTROLYTE SHEET INSPECTION METHOD AND SOLID OXIDE FUEL BATTERY ELECTROLYTE SHEET MANUFACTURING METHOD

摘要

PROBLEM TO BE SOLVED: To provide a solid oxide fuel battery electrolyte sheet which exhibits strength characteristics with higher reliability than ever.SOLUTION: A solid oxide fuel battery electrolyte sheet of the prevent invention is such that the number of flaws on the surface on at least one side of the sheet detected by fluorescence penetrant testing is 30 or less in each block of the sheet divided into square blocks in side dimension of within 30 mm. A solid oxide fuel battery single cell of the present invention comprises a fuel electrode, an air electrode, and the solid oxide fuel battery electrolyte sheet of the prevent invention disposed between the fuel electrode and the air electrode. A solid oxide fuel battery of the prevent invention includes the solid oxide fuel battery single cell of the prevent invention.