ALBERT

Description: 〈p〉Publication date: December 2019〈/p〉 〈p〉〈b〉Source:〈/b〉 Journal of the European Ceramic Society, Volume 39, Issue 15〈/p〉 〈p〉Author(s): Shu Wang, Lei Shi, Zhiang Xie, Yuan He, Dong Yan, Man-Rong Li, Juergen Caro, Huixia Luo〈/p〉 〈h5〉Abstract〈/h5〉 〈div〉〈p〉A series of composites based on (100-〈em〉〈sub〉x〈/sub〉〈/em〉)wt.%Ce〈sub〉0.9〈/sub〉Pr〈sub〉0.1〈/sub〉O〈sub〉2-〈/sub〉δ-〈em〉x〈/em〉wt.%Pr〈sub〉0.6〈/sub〉Ca〈sub〉0.4〈/sub〉FeO〈sub〉3-〈/sub〉δ (〈em〉x〈/em〉 = 25, 40 and 50) doped with the cheap and abundant alkaline earth metal Ca〈sup〉2+〈/sup〉 at the A-site has been successfully designed and fabricated. The crystal structure, oxygen permeability, phase and CO2 stability were evaluated. The composition of 60wt.%Ce〈sub〉0.9〈/sub〉Pr〈sub〉0.1〈/sub〉O〈sub〉2-〈/sub〉δ-40wt.%Pr〈sub〉0.6〈/sub〉Ca〈sub〉0.4〈/sub〉FeO〈sub〉3-〈/sub〉δ(60CPO-40PCFO) possesses the highest oxygen permeability among three studied composites. At 1000 °C, the oxygen permeation fluxes through the 0.3 mm-thickness 60CPO-40PCFO membranes after porous La〈sub〉0.6〈/sub〉Sr〈sub〉0.4〈/sub〉CoO〈sub〉3-〈/sub〉δ each to 1.00 mL cm〈sup〉−2〈/sup〉 min〈sup〉−1〈/sup〉 and 0.62 mL cm〈sup〉−2〈/sup〉 min〈sup〉−1〈/sup〉 under air/He and air/CO〈sub〉2〈/sub〉 gradients, respectively. 〈em〉In situ〈/em〉 XRD results demonstrated that the 60CPO-40PCFO sample displayed a perfect structural stability in air as well as CO〈sub〉2〈/sub〉-containing atmosphere. Thus, low-cost, Co-free and Sr-free 60CPO-40PCFO has high CO〈sub〉2〈/sub〉 stability and is economical and environmental friendly since the expensive and volatile element Co was replaced by Fe and Sr was waived since it easily forms carbonates.〈/p〉〈/div〉 〈h5〉Graphical abstract〈/h5〉 〈div〉〈p〉〈figure〉〈img src="https://ars.els-cdn.com/content/image/1-s2.0-S0955221919304558-ga1.jpg" width="500" alt="Graphical abstract for this article" title=""〉〈/figure〉〈/p〉〈/div〉