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首页> 外文期刊>Journal of Materials Science. Materials in Electronics >Synthesis, characterization, high temperature phase transition and electrical properties of solid solution AgScMo_(2)O_(8)
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Synthesis, characterization, high temperature phase transition and electrical properties of solid solution AgScMo_(2)O_(8)

机译：固溶体AgScMo_（2）O_（8）的合成，表征，高温相变和电性能

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摘要

AgScMo_(2)O_(8) was synthesized by wetchemistry method. The samples were characterized by differential thermal analysis/thermogravimetry, differential scanning calorimetry (DTA/TG, DSC), X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). The novel structure of the sample is different to the other oxide AgLnMo_(2)O_(8) (Ln velence lanthanide). The XRD and DTA/TG, DSC results showed that the formation temperature of AgSc Mo_(2)O_(8) was found to be as low as 450 deg C, and AgScMo_(2)O_(8) crystallized in a monoclinic-type structure at room temperature. With increasing of the temperature two phase transition processes (monoclinic to hextetrahedral and tetragonal) appeared. The electrical property of the samples was also investigated by using A.C impedance spectroscopy. It showed that an abrupt increase of electrical conductivity was found around 500 deg C, which attributes to phase transition. The facts indicted that this kind of material shows a potential application in intermediate-temperature solid oxide fuel cells (SOFCs).
机译：采用湿化学法合成了AgScMo_（2）O_（8）。通过差示热分析/热重分析，差示扫描量热法（DTA / TG，DSC），X射线衍射（XRD）和X射线光电子能谱（XPS）来表征样品。样品的新颖结构不同于其他氧化物AgLnMo_（2）O_（8）（Ln velence镧系元素）。 XRD和DTA / TG，DSC结果表明，AgScMo_（2）O_（8）的形成温度低至450℃，AgScMo_（2）O_（8）以单斜晶型结晶。在室温下的结构。随着温度的升高，出现了两个相变过程（单斜晶向六面体和四方晶）。还通过使用交流阻抗谱研究了样品的电性能。结果表明，在500摄氏度附近发现电导率突然增加，这归因于相变。事实表明，这种材料在中温固体氧化物燃料电池（SOFC）中显示出潜在的应用。

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