【摘要】 质子传导固体氧化物燃料电池具有广阔的应用前景,文章探索以BaCeO₃为主体均相复合BaZrO₃,采用ZnO为烧结助剂,制备了Y和Yb复合掺杂的BaZrO₃-BaCeO₃,即BaCe_0.5Zr_0.3Y_0.2-xYb_xO_3-δ（x=0、0.08、0.16）质子导体,重点研究了Y和Yb复合掺杂对质子导体材料烧结性、微观结构和电导率的影响。实验结果表明,x=0时,即BCZY-Z试样具有较好的性能,1350℃烧结6h试样相对密度达到了97.1%,600℃电导率为6.3×10^-3S/cm,700℃晶界电阻只有18Ω。更多还原

【Abstract】 Proton-conducting solid oxide fuel cells have been found wide applications. This paper focuses on exploration of a proton-conducting material Ba Ce_{0. 5}Zr_{0. 3}Y_{0. 2-x}Yb_xO_3-δ（ x = 0,0. 08,0. 16）. BaCeO₃ as a host was combined with BaZrO₃ to form a homogeneous composite BaZrO₃ BaCeO₃ and ZnO was used as a sintering aid. The effects of Y and Yb co-doping on the sinter-ability,microstructure and conductivity of BaCe_{0. 5}Zr_{0. 3}Y_{0. 2-x}Yb_xO_3-δ（ x = 0,0. 08,0. 16） proton-conductors were investigated. Experimental results indicated that BCZY-Z showed relatively good properties. 97. 1% of theoretical density was reached after sintering at 1350℃for 6 h. The conductivity was as high as 6. 3×10^-3S/cm at 600℃ in wet hydrogen. The grain boundary resistance only had 18 Ω at 700℃.更多还原