贮存氢化锂表面潮解层的化学稳定性研究

发布时间：2018-06-10 19:40

  本文选题：LiH + 潮解　； 参考：《原子能科学技术》2017年02期

【摘要】：利用X射线光电子能谱(XPS)等分析技术研究了LiH表面潮解产物LiOH在室温密封干燥贮存条件下发生的化学变化。结果表明,LiOH和LiH发生固体扩散反应生成Li_2O并放出氢气,以致由聚合物表面包覆的LiH样品密封贮存4a后,表层保护膜与LiH基体之间出现分层或有气泡的现象。实验发现,当样品表面潮解产物LiOH与环境中CO_2气体反应生成稳定的Li_2CO_3后,得以完好保存。本文提出在LiH加工过程中,用一定浓度的CO_2作保护气体钝化其表面,使潮解产物LiOH及时转化为Li_2CO_3,可提高其贮存稳定性。
[Abstract]:The chemical changes of LiOH on LiH surface were studied by X-ray photoelectron spectroscopy (XPS) and other analytical techniques under room temperature sealed and dry storage conditions. The results show that solid diffusion reaction occurs between LiOH and LiH to produce Li2O and release hydrogen. After storage for 4 years by LiH sample coated on polymer surface, there is delamination or bubble between the protective film and LiH matrix. It was found that LiOH, the surface hydrolysate of the sample, could be well preserved when it reacted with COs _ 2 gas in the environment to form a stable LiSZ _ 2CO _ (3). In this paper, it is proposed that the surface of LiH can be passivated by using a certain concentration of CO-2 as protective gas during LiH processing, so that LiOH can be transformed into Li2CO3 in time, and its storage stability can be improved.
【作者单位】： 中国工程物理研究院材料研究所;
【分类号】：TQ131.11

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