TY - JOUR
T1 - A new series of Sr(Co,Fe,Zr)O3-δ perovskite-type membrane materials for oxygen permeation
AU - Yang, Li
AU - Tan, Liang
AU - Gu, Xuehong
AU - Jin, Wanqin
AU - Zhang, Lixiong
AU - Xu, Nanping
PY - 2003/5/28
Y1 - 2003/5/28
N2 - A new series of SrCo0.4Fe0.6-xZrxO3-δ (0 ≤ x ≤ 0.2) and SrCo0.95-xFexZr0.05O3-δ (0.1 ≤ x ≤ 0.8) oxides were synthesized by the solid-state reaction method. The incorporation of Zr and its effect on the crystal chemistry, oxygen permeation, and structural stability of SrCo0.4Fe0.6-xZrxO3-δ have been investigated. Formation of the solid solutions with the cubic perovskite-type structure was found in the SrCo0.4Fe0.6-xZrxO3-δ oxide system in the range of 0 ≤ x < 0.1. The incorporation of the proper content of Zr into SrCo0.4Fe0.6O3-δ suppressed the oxygen loss at high temperature and could stabilize the cubic structure of perovskite in a low oxygen partial pressure atmosphere, while the oxygen permeability of SrCo0.4Fe0.6-xZrxO3-δ membranes decreased with increasing Zr content. A total of 5 mol % of Zr cation dissolution was considered to be enough for the structural stability without deleteriously affecting the oxygen flux. Meanwhile, an investigation of the effect of the Co content on the oxygen permeation and structural stability of SrCo0.95-xFexZr0.05O3-δ series oxides showed that, with increasing Co content, the oxygen permeability increased, but no phase transition occurred in low oxygen partial pressure for all of the samples investigated. Our results indicated that the content of Zr played a critical role in the stability of Sr-Co-Fe-Zr-O series oxides. When good structural stability and oxygen permeation properties are combined, these Sr(Co,Fe,Zr)O3-δ oxides are considered to be promising candidates as oxygen separation membranes.
AB - A new series of SrCo0.4Fe0.6-xZrxO3-δ (0 ≤ x ≤ 0.2) and SrCo0.95-xFexZr0.05O3-δ (0.1 ≤ x ≤ 0.8) oxides were synthesized by the solid-state reaction method. The incorporation of Zr and its effect on the crystal chemistry, oxygen permeation, and structural stability of SrCo0.4Fe0.6-xZrxO3-δ have been investigated. Formation of the solid solutions with the cubic perovskite-type structure was found in the SrCo0.4Fe0.6-xZrxO3-δ oxide system in the range of 0 ≤ x < 0.1. The incorporation of the proper content of Zr into SrCo0.4Fe0.6O3-δ suppressed the oxygen loss at high temperature and could stabilize the cubic structure of perovskite in a low oxygen partial pressure atmosphere, while the oxygen permeability of SrCo0.4Fe0.6-xZrxO3-δ membranes decreased with increasing Zr content. A total of 5 mol % of Zr cation dissolution was considered to be enough for the structural stability without deleteriously affecting the oxygen flux. Meanwhile, an investigation of the effect of the Co content on the oxygen permeation and structural stability of SrCo0.95-xFexZr0.05O3-δ series oxides showed that, with increasing Co content, the oxygen permeability increased, but no phase transition occurred in low oxygen partial pressure for all of the samples investigated. Our results indicated that the content of Zr played a critical role in the stability of Sr-Co-Fe-Zr-O series oxides. When good structural stability and oxygen permeation properties are combined, these Sr(Co,Fe,Zr)O3-δ oxides are considered to be promising candidates as oxygen separation membranes.
UR - http://www.scopus.com/inward/record.url?scp=0037687628&partnerID=8YFLogxK
U2 - 10.1021/ie020931e
DO - 10.1021/ie020931e
M3 - 文章
AN - SCOPUS:0037687628
SN - 0888-5885
VL - 42
SP - 2299
EP - 2305
JO - Industrial and Engineering Chemistry Research
JF - Industrial and Engineering Chemistry Research
IS - 11
ER -