真空镀铝用石墨坩蜗的研究

Study on Al Vacuum Deposition With Graphite Crucible

本文系统地分析了石墨坩埚在真空镀铝过程中损毁的机理，认为石墨坩埚损毁的主 要原因是浸入到石墨微孔中的铝膨胀所致，而腐蚀和化学反应仅是辅助因素。认为提 高石墨坩埚使用寿命的方法是提高石墨原料的密度（假比重）。研究结果已成功应用于 阜新电碳厂的工业生产中，国产坩埚代替进口品，已取得相当可观的经济效益和社会效 益。

In the article, we analyse systematically the mechanism that the graphite crucibles are broken during Al vacuum deposition, and suggest that the main cause making the graphite crucibles broken is the expansion of the Al permeated into the tiny graphite holes, the corrosion and the chemical reaction are only auxiliary causes. A way that raises the life-time of the graphite crucibles is that raises the bulk density of the raw material.