Structure and Electrical Conductivity of Compositely Doped Oxide Solid Electrolyte La0.8Sr0.2Ga0.8Mg0.12Co0.08O2.8

稀土学报(英文版), 2007, 25(z1): 59-62.

^1, , ^2, , ^3, , ^4, , ^5, , ^6,

1.School of Materials Science and Engineering, Tianjin University of Technology, Tianjin 300191, China

2.School of Materials Science and Engineering, Tianjin University of Technology, Tianjin 300191, China

3.School of Materials Science and Engineering, Tianjin University of Technology, Tianjin 300191, China

4.School of Materials Science and Engineering, Tianjin University of Technology, Tianjin 300191, China

5.Rolling Technique and Tandem Automation National Key Laboratory, Northeastern University, Shenyang 110004, China

6.School of Materials Science and Engineering, Tianjin University of Technology, Tianjin 300191, China

基金项目: 天津市自然科学基金(033700111)

Structure and Electrical Conductivity of Compositely Doped Oxide Solid Electrolyte La0.8Sr0.2Ga0.8Mg0.12Co0.08O2.8

Ma Xu ^1, , Zhao Jie ^2, , Wang Zhiqi ^3, , Bao Juncheng ^4, , Li Jianping ^5, , Sun Jiashu ^6,

1.School of Materials Science and Engineering, Tianjin University of Technology, Tianjin 300191, China

2.School of Materials Science and Engineering, Tianjin University of Technology, Tianjin 300191, China

3.School of Materials Science and Engineering, Tianjin University of Technology, Tianjin 300191, China

4.School of Materials Science and Engineering, Tianjin University of Technology, Tianjin 300191, China

5.Rolling Technique and Tandem Automation National Key Laboratory, Northeastern University, Shenyang 110004, China

6.School of Materials Science and Engineering, Tianjin University of Technology, Tianjin 300191, China

Keywords： perovskite

(La, Sr) (Ga, Mg) O3-δ, (LSGM) perovskite compositions doped with transition metal Co on the B-site were prepared by solid state reaction. The effect of partial substitution of Ga for Co, La0.8Sr0.2Ga0.8Mg0.12Co0.08O2.8 (LSGMC2008) on the electrical conductivity was discussed. The results showed the compacted samples sintered at 1350℃ possesses increased electrical conductivity at low temperatures. The XRD patterns of the title materials indicated that LSGMC2008 possessed orthorhombic perovskite-type structure. The grains distributed relatively uniform from SEM photo. The Arrhenius plots of ionic conductivity in air of the LSGMC2008 exhibited differing slopes in the low-and high-temperature regions, and the corresponding Ea values were much lower than that of LSGM2020. All of these suggested that even at low sintering temperature, proper amount Co doped was beneficial to improve ionic conductivity of LSGM.

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材料期刊网

Structure and Electrical Conductivity of Compositely Doped Oxide Solid Electrolyte La0.8Sr0.2Ga0.8Mg0.12Co0.08O2.8

参考文献