vacuum deterioration

With the analysis on the gland system, control mode of unit operation and the operation conditions of unit, it is found that air leakage into gland system is the essential cause for vacuum deterioration, and some feasible solutions are proposed accordingly.

通过对轴封系统、机组运行调节方式、机组运行工况的分析,得出空气漏入轴封系统是真空恶化的根本原因,提出了可行的解决措施。

The theory and the process of a technique called vacuum vaporization is presented that the material is Vaporized in vacuum and then cooled down rapidly-which could be used to fabricate nano-matefials.

介绍了真空汽化冷凝技术制备纳米级材料实验的原理和过程,用真空汽化冷凝技术制备纳米块状锌,并用扫描电镜观察纳米锌的形貌、晶粒度,用X射线衍射测定真空汽化冷凝钠米锌的生长方式及择优取向,用显微硬度计测定了合金锌、粉状锌以及纳米锌的显微硬度,并对此进行了分析。