ELECTROLYTE SHEETS FOR SOLID OXIDE FUEL CELLS AND PRODUCTIONPROCESS THEREOF

摘要

An electrolyte sheet for solid oxide fuel cells, wherein adherence to electrode films that are formed on both sides of the sheet is enhanced, and the electricity generation characteristics of the fuel cells can be improved by increasing the electrode reaction area. The electrolyte sheet is a sheet of sintered body, and the surface roughness Rz of each side of the sheet, which is measured by an optical laser non-contact three-dimensional configuration measuring system, is 2.0-20 ~m, and the surface roughness Ra 0.20-3.0 ~m. Th e Rz ratio of the Rz of one side (i.e. the side of large Rz and Ra) to that of the other side of small Rz and Ra is 1.0-3.0, and the Ra ratio is 1.0-3.0. T he ratio of the Rmax to the Rz (Rmax/Rz ratio) of at least one side is 1.0-2.0. A method for manufacturing such an electrolyte sheet is also disclosed.