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用混合硝酸盐分解法和柠檬酸络合法分别制取了单一钙铁矿型多晶粉末LaNiO_3和LaMnO_3.XRD 分析表明LaNiO_3的形成经历了混合氧化物转化为LaNiO_3的同相反应;而LaMnO_3晶相直接由无定形相转化而来。根据DTA、TG、IR 分析两者的形成,NO_3~-离子都起了重要作用.同时讨论了络合剂柠檬酸的作用.
A single perovskite-type polycrystalline LaNiO 3 and LaMnO 3 powders were prepared by mixed nitrate decomposition and citric acid complexation respectively. XRD analysis showed that the formation of LaNiO 3 underwent the same phase reaction of mixed oxides into LaNiO 3. The LaMnO 3 crystal phase was directly From the amorphous phase into. According to the formation of DTA, TG and IR, NO_3 ~ - ions play an important role. At the same time, the role of complexing agent citric acid is discussed.