Ln_(0.7)Sr_(0.3)Co_(0.9)Cu_(0.1)O_(3-δ)(Ln=Pr,Nd)氧化学扩散性能的研究  

Investigation on Oxygen Chemical Diffusion Propeties of Ln_(0.7)Sr_(0.3)Co_(0.9)Cu_(0.1)O_(3-δ)(Ln=Pr,Nd)

作　　者：王晓波[1] 丁铁柱[1] 潮洛蒙[1] 尚涛[1] 朱成军[1] 张磊[1] 闫祯[1] 

机构地区：[1]内蒙古大学物理科学与技术学院,内蒙古呼和浩特010021

出　　处：《稀土》2011年第6期76-79,共4页Chinese Rare Earths

基　　金：内蒙古高校自然科学重点项目(NJ09002)

摘　　要：采用固相反应法合成了Ln0.7Sr0.3Co0.9Cu0.1O3-δ(Ln=Pr,Nd)钙钛矿氧化物样品,通过XRD和XPS研究样品的物相结构与化学状态,用电导驰豫法研究样品的氧化学扩散系数。实验结果表明,Ln0.7Sr0.3Co0.9Cu0.1O3-δ的氧化学扩散系数随温度的升高而上升;样品Pr0.7Sr0.3Co0.9Cu0.1O3-δ氧扩散系数在800℃时达到3.97×10-5cm2.s-1,是比较理想的中温固体氧化物燃料电池阴极材料。Perovskite oxides of Ln0.7Sr0.3Co0.9Cu0.1O3-δ（Ln=Pr,Nd） samples were obtained by solid state-reaction method.The phase structures and chemistry state were analyzed by X-ray diffraction（XRD） and X-ray photoelectron spectroscopy（XPS）.The oxygen chemical diffusion properties of Ln0.7Sr0.3Co0.9Cu0.1O3-δ（Ln=Pr,Nd） were determined by electrical conductivity relaxation technique.The results show that the oxygen chemical diffusion coefficients of Ln0.7Sr0.3Co0.9Cu0.1O3-δ increase with temperature increasing.The oxygen chemical diffusion coefficients of Pr0.7Sr0.3Co0.9Cu0.1O3-δ achieved 3.97× 10-5cm2·s-1 at 800℃.It is a potential cathodes material for intermediate temperature solid oxide fuel cells.

关 键 词：Ln0.7Sr0.3Co0.9Cu0.1O3-δ 氧化学扩散系数 钙钛矿氧化物 电导弛豫 

分 类 号：O552.2[理学—热学与物质分子运动论]