稀土电解质Ce_(0.8)Gd_(0.2)O_(2-δ)的制备与性能  

Preparation and Properties of Ce_(0.8)Gd_(0.2)O_(2-δ)

作　　者：石倩[1] 郑峰[1] 陈宇[1] 

机构地区：[1]中南大学材料科学与工程学院,湖南长沙410083

出　　处：《稀有金属与硬质合金》2007年第3期1-4,共4页Rare Metals and Cemented Carbides

基　　金：国家自然科学基金重点资助项目(50632070)

摘　　要：采用共沉淀法制备了中温固体氧化物燃料电池(IT-SOFC)电解质材料Ce0.8Gd0.2O2-δ,并对其进行了性能测试。X射线测试表明,前驱体经1 000℃煅烧后得到的粉末为单一的立方萤石结构。SEM测试表明煅烧温度对粉末形貌及烧结体致密度有重大影响,1 350℃烧结后烧结体的相对密度能达到96.4%。同时高温阻抗谱表明,该电解质700℃时离子电导率为0.003 S/cm。Ce0.8Gd0.2O2-δ electrolyte for solid oxide fuel cellI （IT-SOFC）δ was prepared by co-precipitation method. Its properties are tested. The XRD measurement shows that the powder from precursor calcination is of mono-cubic fluorite-type structure. SEM testing shows that the calcination temperature has important influence on powder morphology and density of the sintered body,relative density of which reached 96.4% upon sintering at 1 350 ℃. And the results of impedance spectroscopy showed that ionic conduction of the said electrolyte reached 0. 003 S/cm at 700℃.

关 键 词：共沉淀法 燃料电池 稀土电解质 高温电导率 

分 类 号：O614.33[理学—无机化学]