BONDING MATERIAL, AND FUEL BATTERY STACK STRUCTURE ARRANGED BY USE THEREOF

摘要

PROBLEM TO BE SOLVED: To provide a fuel battery stack structure which has a plurality of cells arranged like a stack and is bonded to a support plate by a bonding material, and in which the occurrence of crack in the bonding material can be suppressed.SOLUTION: The fuel battery stack structure comprises: a plurality of cells 100; and a support plate 210. The support plate 210 has a plurality of insertion holes 211 on its surface for inserting one ends of the plurality of cells 100. In the fuel battery stack structure, the one end of each cell 100 is loosely fit in the corresponding insertion hole 211. A bonding material 300 is provided at least to fill in a gap located in a bonding portion of each insertion hole 211 and the one end of the corresponding cell 100 between the inner wall of the insertion hole 211 and the outer wall of the one end of the corresponding cell 100. The bonding material 300 consists of crystallized glass including multiple kind of crystal phases, which are produced by raising the temperature of amorphous glass to a crystallization temperature to facilitate its crystallization. The volume change rate (crystallization volume change rate) of the bonding material owing to the crystallization under the condition of the crystallization temperature is -0.77 to 1.0%.