VD and working procedure.Experiments showed that major of the LF step foreign inclusions are aluminium sesquioxide. spotted non-deforming inclusion and sulphuret.

VD及成材工序样.系统析了各工序中夹杂物的行为.特征.数量.变化历程及影响因素.实验结果表.

High purity titanium sesquioxide was obtained by the reaction of high purity hydrogen and titanium dioxide in the presence of titanium tetrachloride.

用高纯氢和高纯二氧化钛，在四氯化钛存在下，可以得到高纯三氧化二钛。

The indium sesquioxide with over 99% purity can be prepared by a decomposition of nitric acid. The method was characterized by fewer equipments, simple operation, low cost and quick yield.

采用硝酸法可制纯度高于99%的三氧化二铟.本法具有设备少、操作简单、成本低、见效快等优点.