摘要
采用缓冲溶液法制备出NiO-GDC复合粉末,该粉末压制、烧结后再经氢气气氛还原得到Ni-GDC金属陶瓷阳极。使用XRD,TEM,SEM对NiO-GDC和Ni-GDC的物相、形貌进行了观察分析,测定了阳极还原前后的相对密度、总孔隙率及开孔隙率。实验结果表明,由于NiO转变为Ni,有O的失去,使得还原后试样的相对密度明显下降,而孔隙率由15.4%提高到29.6%,且开孔隙率达到23.1%,可满足阳极作为燃料扩散通道的作用。多孔结构的Ni-GDC金属陶瓷阳极有望成为中温固体氧化物燃料电池的阳极材料。
The NiO-GDC composite powder was synthesized by the buffer solution method. After compaction, sintering, reduction with hydrogen, the Ni-GDC cermet was fabricated. The phase identification and morphology of the synthesized powder were measured by X-ray diffraction （XRD） and transmission electron microscope （TEM）. The relative density, opening porosity and total porosity of the N iO-GDC anode before and ＂,ffter reduction were also determined. The results showed that because of losing of O after reduction, the relative density obviously decline and the porosity obviously increase from 15.4% to 29.6%. At the same time, the opening porosity reached at 23.1%. From the SEM micrograph, it showed that the porous Ni-GDC cermet was the potential porous anode material for IT-SOFC.
出处
《稀有金属快报》
CSCD
2006年第11期22-25,共4页
Rare Metals Letters
基金
南昌航空工业学院自选课题资助(EC200501014)
