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镧化合物加碳氯化的实验研究

Yin-ju JIANG,Yong-chun DENG,Yong-qiang WANG,Wen-bin XIN

Chinese Rare Earths（2017）

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Abstract
分别研究了铈磷灰石型La9.31(Si1.04O4)6O2和La2O3两种化合物氯气加碳的氯化过程.实验得到较佳的氯化条件为:La2O3在600℃氯化45 min,氯化率达95％;Lag.31 (Si1.04O4)6O2在825℃氯化90 min,氯化率达86％.La9.31(Si104O4)6O2的化学稳定性高于La2O3,致使La9.31(Si1.04O4)6O2的氯化难度加大.此外,X射线衍射分析发现,两种镧化合物均为分步氯化过程,LaOCl是中间产物;但La2O3氯化为LaOCl步骤的速度较La9.31(Si1.04O4)6O2快.
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