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草酸镧热分解产物氧化镧直接水解得到反应活性高的氢氧化镧，用热重（ＴＧ）和差热分析（ＤＴＡ）研究了氧化镧的活性，方法简单且不易引进其它杂质。
Lanthanum oxalate thermal decomposition product of lanthanum oxide was directly hydrolyzed to obtain lanthanum hydroxide with high reactivity. The activity of lanthanum oxide was studied by TG and DTA. The method was simple and not easy to introduce other impurities.