UD<sub>3</sub>的表面钝化和氧化特性研究

UD₃的表面钝化和氧化特性研究

摘要: 本文研究了UD₃的表面钝化和氧化特性。利用XRD、激光拉曼技术观察到钝化的UD₃表面致密保护层的主要成分为UO₂。利用量热法研究了钝化的UD₃在空气中的氧化自燃特性，结果显示：当反应温度低于110 ℃时，钝化的UD₃在空气中反应缓慢；当反应温度高于130 ℃时，钝化的UD₃表面保护层被破坏，UD₃在空气中剧烈氧化，钝化的UD₃的自燃温度约为140 ℃。

Abstract: The superficial passivation and oxidation characteristics of UD₃ were researched in this paper. The passivated UD₃ was analyzed by XRD and Raman measurements, and it was found that the protective layer of the passivated UD₃ is mainly UO₂. The oxidized characteristic of the passivated UD₃ was performed in a thermal analyser in the air. The ignition didn’t occur at room temperature. When the reaction temperature is lower than 110 ℃, the passivated UD₃ reacts slowly in the air. When the reaction temperature is higher than 130 ℃, the protective layer of the passivated UD₃ is damaged, and the UD₃ reacts violently in the air. The ignition occurrs at about 140 ℃.