摘要
以有机基流延工艺制备出了不同Ni含量的NiO/Sm0.2Ce0.8O1.9(NiO/SCO)燃料电池阳极支撑体膜。研究了制备工艺条件和Ni含量等因素对阳极膜微结构和性能的影响。试验结果表明:NiO/SCO流延生坯的烧结温度对最终阳极烧结体的孔隙特性有着决定的影响;为获得具有较高孔隙率和一定孔径分布的阳极烧结体,生坯的烧结温度应不超过1350℃;此外,不同含Ni量阳极流延生坯的烧结行为及烧结体的性能也存在明显的差异,在相同的烧结温度下,高含Ni量阳极烧结体的孔隙率和孔径都明显小于低含Ni量的烧结体,其晶粒的平均尺寸则增大。对不同温度下Ni/SCO阳极电导率的测量结果则表明,Ni/SCO阳极的导电性能也与其Ni含量和制备工艺有着密切的关系。
With an organic based tape casting processing, green NiO (Ni) / SCO anode supports with 40% similar to 80% Ni content were prepared and sintered at temperatures ranging from 1200degreesC similar to 1450degreesC. The density and porosity were measured and the pore size and their distribution were checked by a N-2 bubble-point method for the green and sintered anode supports. The microstructure and electrical conductivity were also tested by scanning electron microscope (SEM) and with a four-point technique, respectively. It was found that the porosity and pore size and their distribution were greatly dependent on the sintering temperature of green tapes, all of which decreased with increase of sintering temperature, consistent with the SEM observation. Furthermore, an increase of Ni content in the anode supports results in the decrease of porosity and mean pore size. It is also shown that the processing parameters as well as the Ni content play key roles in determining the electrical conductivity of Ni/SCO anodes.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2003年第12期986-990,共5页
Rare Metal Materials and Engineering
基金
国家自然科学基金(20071029)
国家"973"计划(G-2000026409)资助项目
