纳米多晶氟化锂透明陶瓷的高温高压烧结
唐名轩

西南交通大学 物理与科学技术学院，四川成都，610031；

摘要：本文采用大腔体压机静压烧结技术，在3-5 GPa压力、600-800 ℃烧结温度、15-120 min保温时间的工艺范围内，分别在添加与不添加烧结助剂的条件下，制备了LiF多晶透明陶瓷。围绕温度、压力、烧结时间、烧结助剂四个核心维度，系统分析了高温高压烧结条件与多晶陶瓷透明性之间的关联规律。研究发现，升高烧结温度与增大压力可促进陶瓷内部孔隙闭合，进而提升透明性；烧结助剂的添加有助于氟化锂晶粒的再生长，推动烧结过程中致密化程度的提升，但过短的保温时间不利于烧结助剂的排出，反而可能降低陶瓷的透明性。最终在800 ℃、5 GPa、保温15 min的工艺条件下，烧结获得了在477 nm波长处最大透过率达69.19%的LiF多晶陶瓷，研究结果可为多晶窗口材料的制备工艺研究提供一定的分析与参考。

关键词：高温高压；氟化锂；透明窗口

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