TY - JOUR
T1 - Role of ZrO2 addition on oxygen transport and stability of ZrO2-promoted SrCo0.4Fe0.6 O3-δ
AU - Yang, Li
AU - Gu, Xuehong
AU - Tan, Liang
AU - Zhang, Lixiong
AU - Wang, Chongqing
AU - Xu, Nanping
PY - 2003/7/1
Y1 - 2003/7/1
N2 - The crystal structure, oxygen permeation and stability of ZrO2-promoted SrCo0.4Fe0.6O3-δ (SCFZ) were compared with those of SrCo0.4Fe0.6 O3-δ (SCF). X-ray diffraction (XRD) and energy dispersive X-ray (EDX) analysis of SCFZ revealed that solubility of Zr into the SCF phase took place, resulting in a lattice expansion of SCF at high temperatures. SCFZ oxide showed enhanced structure stability compared to SCF without undergoing crystallographic phase transition when annealed in helium at high temperatures. The oxygen permeation experiments showed that long-term operation stability of the SCF membrane with addition of ZrO2 was greatly improved, the oxygen permeation flux, however, was slightly reduced probably due to the Zr dissolution in SCF.
AB - The crystal structure, oxygen permeation and stability of ZrO2-promoted SrCo0.4Fe0.6O3-δ (SCFZ) were compared with those of SrCo0.4Fe0.6 O3-δ (SCF). X-ray diffraction (XRD) and energy dispersive X-ray (EDX) analysis of SCFZ revealed that solubility of Zr into the SCF phase took place, resulting in a lattice expansion of SCF at high temperatures. SCFZ oxide showed enhanced structure stability compared to SCF without undergoing crystallographic phase transition when annealed in helium at high temperatures. The oxygen permeation experiments showed that long-term operation stability of the SCF membrane with addition of ZrO2 was greatly improved, the oxygen permeation flux, however, was slightly reduced probably due to the Zr dissolution in SCF.
KW - Mixed conducting membrane
KW - Oxygen permeation membrane
KW - Perovskite-like structure
KW - Phase stability
KW - ZrO-promoted SrCoFe O
UR - http://www.scopus.com/inward/record.url?scp=0037565208&partnerID=8YFLogxK
U2 - 10.1016/S1383-5866(03)00046-7
DO - 10.1016/S1383-5866(03)00046-7
M3 - 文章
AN - SCOPUS:0037565208
SN - 1383-5866
VL - 32
SP - 301
EP - 306
JO - Separation and Purification Technology
JF - Separation and Purification Technology
IS - 1-3
ER -