Electrical properties of Fe-doped SrTiO3 with B-site-deficient for SOFC anodes

Runping Li; Fanhan Liu; Cheng Zhang; Jianhua Liu; Junwen Zhou; Lei Xu

doi:10.1016/j.ceramint.2019.07.167

Electrical properties of Fe-doped SrTiO₃ with B-site-deficient for SOFC anodes

Runping Li, Fanhan Liu, Cheng Zhang, Jianhua Liu^*, Junwen Zhou, Lei Xu

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17 引用（Scopus）

摘要

Sr(Ti_0.6Fe_0.4)_1-xO_3-δ precursors were prepared through the sol–gel method. The samples sintered in air at 1350 °C for 300 min were characterized in terms of conductivity, bulk density, microstructure and phase analysis via AC impedance, scanning electron microscope (SEM), Archimedes’ method and X-ray diffraction (XRD). The total electrical conductivity of Sr(Ti_0.6Fe_0.4)_1-xO_3-δ samples can be remarkably improved by B-site-deficient level (x). When x = 0.07, the total electrical conductivity reaches a maximum of 0.3445 S/cm at 800 °C. The microstructure of the sample becomes more porous as the B-site-deficient level increases. The relative density of samples is becoming lower with B-site-deficient level increases. Diffraction peaks without impurities appear in the X-ray diffraction pattern, indicating the formation of a single perovskite structure. In addition, the Sr(Ti_0.6Fe_0.4)_1-xO_3-δ/YSZ samples show a great chemical stability and compatibility.

源语言	英语
页（从-至）	21684-21687
页数	4
期刊	Ceramics International
卷	45
期	17
DOI	https://doi.org/10.1016/j.ceramint.2019.07.167
出版状态	已出版 - 1 12月 2019
已对外发布	是

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@article{4ae198d8b47f479da251cbc07f253b8e,

title = "Electrical properties of Fe-doped SrTiO3 with B-site-deficient for SOFC anodes",

abstract = "Sr(Ti0.6Fe0.4)1-xO3-δ precursors were prepared through the sol–gel method. The samples sintered in air at 1350 °C for 300 min were characterized in terms of conductivity, bulk density, microstructure and phase analysis via AC impedance, scanning electron microscope (SEM), Archimedes{\textquoteright} method and X-ray diffraction (XRD). The total electrical conductivity of Sr(Ti0.6Fe0.4)1-xO3-δ samples can be remarkably improved by B-site-deficient level (x). When x = 0.07, the total electrical conductivity reaches a maximum of 0.3445 S/cm at 800 °C. The microstructure of the sample becomes more porous as the B-site-deficient level increases. The relative density of samples is becoming lower with B-site-deficient level increases. Diffraction peaks without impurities appear in the X-ray diffraction pattern, indicating the formation of a single perovskite structure. In addition, the Sr(Ti0.6Fe0.4)1-xO3-δ/YSZ samples show a great chemical stability and compatibility.",

keywords = "B-Site-deficient, Fe-doped SrTiO, Ionic conductivity, Sol–gel method",

author = "Runping Li and Fanhan Liu and Cheng Zhang and Jianhua Liu and Junwen Zhou and Lei Xu",

note = "Publisher Copyright: {\textcopyright} 2019 Elsevier Ltd and Techna Group S.r.l.",

year = "2019",

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doi = "10.1016/j.ceramint.2019.07.167",

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T1 - Electrical properties of Fe-doped SrTiO3 with B-site-deficient for SOFC anodes

AU - Li, Runping

AU - Liu, Fanhan

AU - Zhang, Cheng

AU - Liu, Jianhua

AU - Zhou, Junwen

AU - Xu, Lei

PY - 2019/12/1

Y1 - 2019/12/1

N2 - Sr(Ti0.6Fe0.4)1-xO3-δ precursors were prepared through the sol–gel method. The samples sintered in air at 1350 °C for 300 min were characterized in terms of conductivity, bulk density, microstructure and phase analysis via AC impedance, scanning electron microscope (SEM), Archimedes’ method and X-ray diffraction (XRD). The total electrical conductivity of Sr(Ti0.6Fe0.4)1-xO3-δ samples can be remarkably improved by B-site-deficient level (x). When x = 0.07, the total electrical conductivity reaches a maximum of 0.3445 S/cm at 800 °C. The microstructure of the sample becomes more porous as the B-site-deficient level increases. The relative density of samples is becoming lower with B-site-deficient level increases. Diffraction peaks without impurities appear in the X-ray diffraction pattern, indicating the formation of a single perovskite structure. In addition, the Sr(Ti0.6Fe0.4)1-xO3-δ/YSZ samples show a great chemical stability and compatibility.

AB - Sr(Ti0.6Fe0.4)1-xO3-δ precursors were prepared through the sol–gel method. The samples sintered in air at 1350 °C for 300 min were characterized in terms of conductivity, bulk density, microstructure and phase analysis via AC impedance, scanning electron microscope (SEM), Archimedes’ method and X-ray diffraction (XRD). The total electrical conductivity of Sr(Ti0.6Fe0.4)1-xO3-δ samples can be remarkably improved by B-site-deficient level (x). When x = 0.07, the total electrical conductivity reaches a maximum of 0.3445 S/cm at 800 °C. The microstructure of the sample becomes more porous as the B-site-deficient level increases. The relative density of samples is becoming lower with B-site-deficient level increases. Diffraction peaks without impurities appear in the X-ray diffraction pattern, indicating the formation of a single perovskite structure. In addition, the Sr(Ti0.6Fe0.4)1-xO3-δ/YSZ samples show a great chemical stability and compatibility.

KW - B-Site-deficient

KW - Fe-doped SrTiO

KW - Ionic conductivity

KW - Sol–gel method

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Electrical properties of Fe-doped SrTiO3 with B-site-deficient for SOFC anodes

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Electrical properties of Fe-doped SrTiO₃ with B-site-deficient for SOFC anodes