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Synthesis of LaGaO_3-Based Electrolyte Material and Its compatibility with Novel Electrode Materials

Journal of Rare Earths 2005年第S1期23卷 214-218页

作者：刘荣辉马文会王华杨斌戴永年 Faculty of Materials and Metallurgical Engineering Kunming University of Science and Technology Kunming 650093 China Key Laboratory of Vacuum Metallurgy of Non-Ferrous metals of Yunnan Province Kunming University of Science and Technology Kunming 650093 China Key Laboratory of Vacuum Metallurgy of Non-Ferrous metals of Yunnan Province Kunming University of Science and Technology Kunming 650093 China Faculty of Materials and Metallurgical Engineering Kunming University of Science and Technology Kunming 650093 China

La_ 1-xSr_xGa_ 1-yMg_yO_ 3-δ(LSGM)electrolyte material was synthesized by solid-state reaction method. The microstructure characteristics were tested via X-ray diffraction(XRD), scanning electron microcopy (SEM), and energy dispersive spectroscopy (EDS). XRD patterns indicate that perovskite phase began to form when the mixed materials were sintered at 1000 ℃, and the material has a pure LSGM perovskite phase when the mixed materials were sintered at 1450 ℃ in air for 24 h. No chemical reaction between LSGM electrolyte material and La_ 1-xSr_xMn_ 1-yCr_yO_ 3-δ(LSMC) anode material or La_ 1-xSr_xFe_ 1-yCo_yO_ 3-δ (LSFC) cathode material was detected after the mixed materials consisting of LSGM and LSMC or LSFC was sintered at 1200 ℃ in air for 15 h respectively, which shows that LSGM electrolyte material has excellent chemical compatibility with LSMC anode and LSFC cathode materials. According to SEM, LSMC anode film and cathode composite film of LSFC and LSMC prepared using direct painting method by sintering at 1150 ℃ are both porous and well cohered on LSGM electrolyte substrate.

关键词： solid-state reaction La_ 1-xSr_xGa_ 1-yMg_yO_ 3-δ chemical and thermodynamic compatibility

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