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.
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Saracco, G., Versteeg, G. F., van Swaaij, W. P. M., Current hurdles to the success of high-temperature membrane reactors, J. Membr. Sci., 1994, 95: 105.
Balachandran, U., Dusek, J. T., Mieville, R. L. et al., Dense ceramic membranes for partial oxidation of methane to syngas, Appl. Catal. A: Gen., 1995, 133: 19.
Bose, A. C., Stiegel, G. J., Sammells, A. F., Ion-electron conducting ceramic membrane-based technologies of the future, Proc. of 5th ICIM’98, Nagoya, 1998, 6–9.
Burggraaf, A. J., Boukamp, B. A., Vinke, I. C. et al., Recent developments in oxygen-ion conducting solid electrolyte and electrode materials, Advances in Solid-State Chemistry, 1989, 1: 259.
Li, S., Cong, Y., Yang, W. et al., Oxygen permeating properties of the mixed conducting membrane without cobalt, Mater. Res. Bull., 1988, 33: 183.
ten Elshof, J. E., Bouwmeester, H. J. M., Verweij, H., Oxygen transport through La1-xSrxFeO3-δ membranes, II. Permeation in air/CO, CO2 gradients, Solid State Ionics, 1996, 89: 81.
Wu, Y., Yu, T., Dou, B. et al., A comparative study on perovskite-type mixed oxide catalysts A x ′A1-x BO3-δ (A′ = Ca, Sr, A = La, B = Mn, Fe, Co) for NH3 oxidation, J. Catal., 1989, 120: 88.
Ramadass, N., ABO3-type oxides—Their structure and properties—A bird’s eye view, Mater. Sci. Eng., 1978, 36: 231.
Shannon, R. D., Prewitt, C. T., Revised values of effective ionic radii, Acta Cryst., 1970, B26: 1046.
Cook, R. L., Sammells, A. F., On the systematic selection of perovskite solid electrolytes for intermediate temperature fuel cells, Solid State Ionics, 1991, 45: 311.
Itoh, N., Kato, T., Uchida, K. et al., Preparation of pore-free disk of La1-x Sr x CoO3 mixed conductor and its oxygen perme-ability, J. Membr. Sci., 1994, 92: 239.
Cook, R. L., MacDuff, R. C., Sammells, A. F., Perovskite solid electrolytes for intermediate temperature solid oxide fuel cells, J. Electrochem. Soc., 1990, 137: 3309.
Kilner, J. A., Brook, R. J., A study of oxygen ion conductivity in doped non-stoichiometric oxides, Solid State Ionics, 1982, 6: 237.
Pei, S., Kleefisch, M. S., Kobylinski, T. P. et al., Failure mechanisms of ceramic membrane reactors in partial oxidation of methane to synthesis gas, Catal. Lett., 1995, 30: 201.
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Shao, Z., Cong, Y., Xiong, G. et al. Mixed-conducting perovskite-type SrxBi1-xFeO3-δ oxygen-permeating membranes. Sc. China Ser. B-Chem. 43, 421–427 (2000). https://doi.org/10.1007/BF02969448
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DOI: https://doi.org/10.1007/BF02969448