Synthesis and electrical conductivity of La_<0.6>Sr_<0.4>Ru_<0.9>Mg_<0.1>O_<3-δ> perovskite solid solution

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La0.6Sr0.4Ru0.9Mg0.1O3-δ (LSRM) powder was prepared by co-precipitation method using ammonium carbonate solution and nitrate solutions. The freeze-dried suspension was decomposed at 1000°C in air. The obtained LSRM powder was sintered in air at 1200°C for 4 h to measure the electrical conductivity. The LSRM solid solution, which was stable in the temperature range from 1000 to 1500°C in air, was referred to an orthorhombic structure. The measured true density of LSRM powder was close to the density calculated using X-ray diffraction data. No chemical reaction occurred between LSRM and Gd-doped ceria electrolyte at 1000°C in air. The electronic conductivity of LSRM measured by a four-terminal DC method was 423 and 361 S·cm-1 at 300 and 800°C, respectively.
公益社団法人日本セラミックス協会の論文
2009-05-01