| 摘要 |
<P>PROBLEM TO BE SOLVED: To minimize occurence of cracking in a support substrate during calcination, in a fuel cell which is a calcined body including a planar porous support substrate having a gas passage formed therein. <P>SOLUTION: The fuel cell is a calcined body including a planar porous support substrate 11 having a gas passage 18 formed therein, and a power generation element provided on the principal surface of the support substrate 11 and having at least a fuel electrode 12, a solid electrolyte 13, and an air electrode 14 laminated in this order. Note that occurence of cracking in the support substrate has strong correlation with "the surface roughness of the wall surface of the gass passage" of the fuel cell in the state of non-reductant. When the fuel cell is in the state of non-reductant not subjected to heat treatment in reduction atmosphere, occurrence of cracking is minimized if the surface roughness of the wall surface of the gass passage 18 is 0.11-5.1 μm in terms of arithmetic average roughness Ra. <P>COPYRIGHT: (C)2013,JPO&INPIT |
