Sm_2O_3和Nd_2O_3共同掺杂CeO_2基电解质材料的研究  

Study on Sm_2O_3 and Nd_2O_3 Co-doped Ceria Based Electrolyte

作　　者：刘燕祎[1] 潘伟[1] 李彬[1] 陈争辉[1] 

机构地区：[1]清华大学材料科学与工程系新型陶瓷与精细工艺国家重点实验室,北京100084

出　　处：《稀有金属材料与工程》2007年第A02期609-612,共4页Rare Metal Materials and Engineering

基　　金：国家自然科学基金项目(50232020;50572042)资助

摘　　要：采用柠檬酸-硝酸盐法合成出单一相、均匀的Ce_(0.8)Sm_xNd_(0.2-x)O_(1.9)粉体,XRD结果表明该粉体为单相萤石结构,粒径约在11.7 nm～20.1 nm之间。将粉体干压成型,在1400℃下无压烧结5 h可得到高致密度陶瓷。SEM照片显示陶瓷微观结构均匀,晶粒尺寸在2μm～4μm。经直流四端电极法测试得到该样品在500℃时电导率约在0.012 S/cm。该结果说明与单项掺杂相比,两相共掺杂会进一步提高材料的电导率。Nano-erystalline and fluorite single-phased Ce0.8SmxNd0.2-xO1.9 powders were prepared by low-temperature combustion process in citric-nitrate system. It is calculated from X-ray diffraction patterns that the size of the powders was between 11.7 nm and 20.1 nm. A high density ceramic can be obtained after the powders were dry pressed and sintered at 1400 ℃ for 5 h. The SEM mierographs showed the mierostructure of the ceramic was homogenous, and the grain size was between 2 μm and 4μm. The electrical conductivity of the sample at 500 ℃ can reach to 0.012 S/cm. It can be concluded that co-doped ceria based electrolyte possesses a higher electrical conductivity in comparison with single-doped ceria based materials

关 键 词：固体燃料电池 氧化铈 电解质 电导率 

分 类 号：TB383.3[一般工业技术—材料科学与工程]