【摘要】 化学气相传输法制取无水DyBr₃,以Dy₂O₃为原料,无水溴化铝为溴化剂和传输介质,Dy₂O₃（s）与过量的溴化铝反应,生成DyBr₃（s）。无水溴化铝在高温下形成气态Al₂Br₆,并与Dy₂O₃（s）反应,生成气态配合物DyAl₃Br₁₂,该气态配合物在低温下分解。在高温端温度为723～753K,低温端温度为453～473K的温度梯度场中,进行化学气相传输反应,实现DyBr₃（s）的气相传输分离,得无水DyBr₃。经分析可知,随气相传输反应时间的延长,DyBr₃的产率增加,利用化学气相传输法可获得纯度较高的无水溴化镝。更多还原

【Abstract】 The preparation of anhydrous dysprosium bromide by chemical vapor transport method was reported. DyBr3(s) was produced by the reaction of Dy2O3(s) (raw material) with excess amount of AlBr3(transportation). Vapor Al2Br6 was formed at high temperature, which reacted further with DyBr3(s) to form complex DyAl3Bri2, which decomposed back into Al2Br6 and DyBr3 at low temperature. Thus, after chemical vapor transport reaction in the temperature gradient field of which the higher temperature range was 723~753 K and the lower temperature range was 453 ~ 473 K, anhydrous DyBr3 was separated from other solids finally. The analysis shows that the longer the chemical vapor transport time prolong, the more the yield of DyBr3 increase. It is concluded that anhydrous dysprosium bromide of the high purity can be obtained by chemical vapor transport method.更多还原