Mixed-conducting perovskite-type SrxBi1-xFeO3-δ oxygen-permeating membranes

Zongping Shao; You Cong; Guoxing Xiong; Shishan Sheng; Weishen Yang

doi:10.1007/BF02969448

Mixed-conducting perovskite-type Sr_xBi_1-xFeO_3-δ oxygen-permeating membranes

Zongping Shao, You Cong, Guoxing Xiong, Shishan Sheng, Weishen Yang

CAS - Dalian Institute of Chemical Physics

Research output: Contribution to journal › Article › peer-review

10 Scopus citations

Abstract

Sr_xBi_1-xFeO_3-δ (SBF) series mixed conductors were synthesized using standard ceramic method. The properties of such materials were characterized by XRD, O₂-TPD techniques. Abnormal crystal phenomena were found and explained and correlated with the oxygen permeation results. By analysis of the critical radius (r_c), the degree of openness of the lattice (F_v) and the average metal-oxygen bonding energy of the perovskite lattice (ABE), it was proposed that the oxygen permeation flux is determined mainly by the oxygen diffusion rate in bulk when 1-x≤0.5, and by the concentration of oxygen vacancy when 1-x≥0.5. The stability of Sr_0.5Bi_0.5FeO_3-δ was also investigated, and the high stability of it was attributed to the stable BO₆ octahedra.

Original language	English
Pages (from-to)	421-427
Number of pages	7
Journal	Science in China, Series B: Chemistry
Volume	43
Issue number	4
DOIs	https://doi.org/10.1007/BF02969448
State	Published - Aug 2000
Externally published	Yes

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title = "Mixed-conducting perovskite-type SrxBi1-xFeO3-δ oxygen-permeating membranes",

abstract = "SrxBi1-xFeO3-δ (SBF) series mixed conductors were synthesized using standard ceramic method. The properties of such materials were characterized by XRD, O2-TPD techniques. Abnormal crystal phenomena were found and explained and correlated with the oxygen permeation results. By analysis of the critical radius (rc), the degree of openness of the lattice (Fv) and the average metal-oxygen bonding energy of the perovskite lattice (ABE), it was proposed that the oxygen permeation flux is determined mainly by the oxygen diffusion rate in bulk when 1-x≤0.5, and by the concentration of oxygen vacancy when 1-x≥0.5. The stability of Sr0.5Bi0.5FeO3-δ was also investigated, and the high stability of it was attributed to the stable BO6 octahedra.",

author = "Zongping Shao and You Cong and Guoxing Xiong and Shishan Sheng and Weishen Yang",

year = "2000",

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T1 - Mixed-conducting perovskite-type SrxBi1-xFeO3-δ oxygen-permeating membranes

AU - Shao, Zongping

AU - Cong, You

AU - Xiong, Guoxing

AU - Sheng, Shishan

AU - Yang, Weishen

PY - 2000/8

Y1 - 2000/8

N2 - SrxBi1-xFeO3-δ (SBF) series mixed conductors were synthesized using standard ceramic method. The properties of such materials were characterized by XRD, O2-TPD techniques. Abnormal crystal phenomena were found and explained and correlated with the oxygen permeation results. By analysis of the critical radius (rc), the degree of openness of the lattice (Fv) and the average metal-oxygen bonding energy of the perovskite lattice (ABE), it was proposed that the oxygen permeation flux is determined mainly by the oxygen diffusion rate in bulk when 1-x≤0.5, and by the concentration of oxygen vacancy when 1-x≥0.5. The stability of Sr0.5Bi0.5FeO3-δ was also investigated, and the high stability of it was attributed to the stable BO6 octahedra.

AB - SrxBi1-xFeO3-δ (SBF) series mixed conductors were synthesized using standard ceramic method. The properties of such materials were characterized by XRD, O2-TPD techniques. Abnormal crystal phenomena were found and explained and correlated with the oxygen permeation results. By analysis of the critical radius (rc), the degree of openness of the lattice (Fv) and the average metal-oxygen bonding energy of the perovskite lattice (ABE), it was proposed that the oxygen permeation flux is determined mainly by the oxygen diffusion rate in bulk when 1-x≤0.5, and by the concentration of oxygen vacancy when 1-x≥0.5. The stability of Sr0.5Bi0.5FeO3-δ was also investigated, and the high stability of it was attributed to the stable BO6 octahedra.

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JF - Science in China, Series B: Chemistry

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Mixed-conducting perovskite-type Sr_xBi_1-xFeO_3-δ oxygen-permeating membranes

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