| 摘要 |
<P>PROBLEM TO BE SOLVED: To solve such a problem that when the electrolyte of a solid oxide fuel cell operating at intermediate or low temperatures of about 600°C is produced by sintering a raw powder material, an additive element for promoting the sintering is added in order to obtain a dense body because the sinterability of an electrolyte material is low, but this kind of additive inhibits proton conductivity. <P>SOLUTION: The element of a sintering aid which remains in the dense body of sintered electrolyte and inhibits electrical conduction is replaced utilizing solid phase diffusion of other element in an electrode substrate in tight contact therewith. For example, the electrolyte is BaZrO<SB POS="POST">3</SB>, and the sintering aid of that powder is In. The electrode substrate is NiO doped or BaZr<SB POS="POST">x</SB>Y<SB POS="POST">1-x</SB>O<SB POS="POST">3-δ</SB>. In of the electrolyte is replaced by Y of the electrode to become BaZr<SB POS="POST">x</SB>Y<SB POS="POST">1-x</SB>O<SB POS="POST">3-δ</SB>and shows good proton conductivity. <P>COPYRIGHT: (C)2012,JPO&INPIT |
