期刊
SEPARATION AND PURIFICATION TECHNOLOGY
卷 81, 期 1, 页码 88-93出版社
ELSEVIER
DOI: 10.1016/j.seppur.2011.07.007
关键词
BSCF; Yttrium; Oxygen separation; Partial substitution; Perovskite
资金
- Australian Research Council [DP0878849]
- Australian Government
- University of Queensland
- Australian Research Council [DP0878849] Funding Source: Australian Research Council
This work investigates the partial substitution of yttrium in place of iron in BSCF to form Ba0.5Sr0.5Co0.8Fe0.2-xYxO3-delta, where x varied between 0 and 0.2. X-ray diffraction patterns showed the formation of a perovskite cubic phase structure up to x = 0.15, whilst the full substitution of yttrium (x = 0.2) for iron resulted in a non-cubic crystal structure that did not exhibit oxygen permeation. The yttrium partial substitution in BSCFY discs (1.2 mm thick) delivered best results for x = 0.025, as oxygen fluxes reached 2.05 ml cm(-2) min(-1) at 900 degrees C, an increase of 160% as compared to a blank BSCF (x = 0) membrane. This was attributed to the combined effect of the formation of a greater number of oxygen vacancies, together with improved ion mobility, associated with the beneficial yttrium substitution into the BSCF perovskite structure which stemmed from the crystal lattice expansion. (C) 2011 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据