La0.05Ba0.95FeO3-δ-Gd0.2Ce0.8O2-δ双相透氧膜材料的制备及其性能研究  

Preparation and Properties of La0.05Ba0.95FeO3-δ-Gd0.2Ce0.8O2-δDual-phase Oxygen Permeable Membranes

作　　者：沈乐宇 邓红 赵海雷[1,2] SHEN Leyu;DENG Hong;ZHAO Hailei(School of Materials Science and Engineering,University of Science and Technology Beijing,Beijing 100083,China;Beijing Municipal Key Laboratory of New Energy Materials and Technologies,Beijing 100083,China)

机构地区：[1]北京科技大学材料科学与工程学院,北京100083 [2]新能源材料与技术北京市重点实验室,北京100083

出　　处：《陶瓷学报》2020年第6期913-918,共6页Journal of Ceramics

基　　金：国家重点研发计划(2018YFB1502202)。

摘　　要：采用传统陶瓷方法制备了致密的La0.05Ba0.95FeO3-δ(LBFO)-Gd0.2Ce0.8O2-δ(GDC)双相透氧膜材料,并对不同比例的双相材料进行结构和性能表征。结果表明,LBFO和GDC之间具有很好的化学相容性,1300°C致密化烧结后未见杂质产生。两相可以相互结合形成致密陶瓷。GDC相含量的增加使材料的电导率、透氧率降低,但有助于材料结构稳定性的提高。当GDC含量为70wt.%时,该透氧膜材料在还原气氛下具有较好的稳定性,其透氧率在900℃时可以到达0.34 mL·min^-1·cm^-2。La0.05Ba0.95FeO3-δ(LBFO)-Gd0.2Ce0.8O2-δ(GDC)dual-phase oxygen permeation membranes were prepared by using the conventional ceramic route,while their structure and properties as a function of the phase ratio were studied.It is found that the LBFO and GDC phases have high chemical compatibility,without the presence of impurities after sintering at 1300℃.The two phases can be effectively combined to form dense samples.With increasing content of GDC,the electrical conductivity and oxygen permeability are decreased,while the structure stability against reducing atmosphere is increased.When the content of GDC reaches 70wt.%,the dual-phase membrane delivers an oxygen permeability of 0.34 mL·min^-1·cm^-2 at 900℃.

关 键 词：透氧膜 双相材料 铁基钙钛矿 钆掺杂氧化铈 结构稳定性 

分 类 号：TQ174.75[化学工程—陶瓷工业]