ELECTROLYTE SHEET FOR SOLID OXIDE FUEL CELL, METHOD FOR PRODUCING ELECTROLYTE SHEET FOR SOLID OXIDE FUEL CELL, AND CELL UNIT FOR SOLID OXIDE FUEL CELL

An electrolyte sheet for solid oxide fuel cells that includes a ceramic plate body having a thickness of 200 μm or less, and defining at least one through hole penetrating the ceramic plate body in a thickness direction thereof, and wherein with a minimum value and a maximum value among radii of the at least one through hole being defined as R min and R max, respectively, the at least one through hole has a ratio R min/R max of 0.99 to 1.00 in a plan view from the thickness direction.