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复合氧化物系统在材料研究中占有重要地位。本文参照文献[1],预测了稀士氧化物与一氧化铅系统生成中间化合物的情况。表1列出了所用预测参数和结果。预测表明,RE_2O_3-PbO系统可能存在中间化合物。实验所用EU_2O_3纯度为99.99％,属立方结构,a=10.869(?);PbO为化学纯的黄色粉末,属正交结构。按不同配比混合Eu_2O_3和PbO粉末,在400kg/cm~2压力下压成圆柱状样品,然后在氧化铝坩埚中,于825℃灼烧12小时。烧好的样品磨成粉末,供X射线衍射和化学分析使用。
Complex oxide systems play an important role in material research. In this paper, reference [1], predicted the formation of intermediate compounds between the rare earth oxides and the lead oxide system. Table 1 lists the forecast parameters and results used. The prediction shows that intermediate compounds may exist in the RE 2 O 3 -PbO system. The purity of EU_2O_3 used in the experiment is 99.99%, which belongs to the cubic structure with a = 10.869 (?). PbO is a chemically pure yellow powder with an orthorhombic structure. The Eu_2O_3 and PbO powders were mixed at various ratios and pressed into a cylindrical sample at a pressure of 400 kg / cm ~ 2, followed by firing in an alumina crucible at 825 ° C for 12 hours. The burned sample is ground into powder for X-ray diffraction and chemical analysis.