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采用传统固相反应法,制备了一系列钙钛矿结构的稀土锰氧化物Sm1-xBaxMnO3(x=0～0.5)样品,借助XRD和FTIR对样品的相结构和组成进行了研究,用四端子法测量了样品在室温下的电导率。结果表明,当x<0.4时,样品为单一的钙钛矿结构;当0.4≤x≤0.5时,样品为Sm1-xBaxMnO3和BaMnO3两相共存。红外光谱分析显示,样品在600 cm-1附近的红外吸收峰随着x值的增大向高波数方向偏移。室温下样品的电导率随着x值的增大先增大后减小,在x=0.3时达到最大值,为2.55 S·cm-1。
A series of Sm1-xBaxMnO3 (x = 0 ~ 0.5) samples with perovskite structure were prepared by the conventional solid-state reaction method. The phase structure and composition of the samples were investigated by XRD and FTIR. The method measures the conductivity of the sample at room temperature. The results show that when x <0.4, the sample has a single perovskite structure. When 0.4≤x≤0.5, the samples coexist in two phases, Sm1-xBaxMnO3 and BaMnO3. Infrared spectrum analysis showed that the infrared absorption peak of the sample near 600 cm-1 shifted toward higher wave number with the increase of x value. At room temperature, the conductivity of the sample first increased and then decreased with the increase of x value, reaching the maximum value of 2.55 S · cm-1 at x = 0.3.