Abstract
AgScMo2O8 was synthesized by wet-chemistry 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 AgLnMo2O8 (Ln = lanthanide). The XRD and DTA/TG, DSC results showed that the formation temperature of AgScMo2O8 was found to be as low as 450°C, and AgScMo2O8 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°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).
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