1. VD and working procedure.Experiments showed that major of the LF step foreign inclusions are aluminium sesquioxide. spotted non-deforming inclusion and sulphuret.
   VD及成材工序现场取样.系统分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.实验结果表明.
2. 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。
3. 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.
   采用硝酸分解法可制取纯度高于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.

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