兆巴压力冲击压缩下蓝宝石是金属冲击温度测量的重要窗口，也能体现下地幔物质的结构特性。然而冲击压缩过程蓝宝石微观结构变化研究尚不充分，不同相变区冲击发光辐射机理也存在争议。本项目拟在解决动态过程辐射信息捕获关键技术基础上，对蓝宝石在120-220GPa压力区间的冲击发光辐射特性和微观结构变化展开研究。首先，利用辐射高温计技术和时间分辨光谱技术研究兆巴压力调控下蓝宝石瞬态发光特性以及变化规律，结合实验测量和模型分析，在不同相变区得到蓝宝石辐射强度、辐射温度等物理参数。其次，通过非均匀热辐射模型和剪切带热平衡模型合理解释蓝宝石的冲击发光辐射机理，给出辐射温度与高压结构相变、高压熔化线的关系，得到利用熔化线限定蓝宝石高压相图的一种新途径。研究结果有助于修正金属冲击温度实验数据与模型，理解透明材料的冲击动力学行为，在物质高温高压状态方程、高压凝聚态物理和地球科学研究领域具有重要应用价值。

Sapphire is an important window for metal shock temperature measurement under the shock pressures of mega-bar, and it can also reflect the structural characteristics of lower mantle materials. The microstructure of sapphire under shock compression is not sufficient. But the mechanism of shock light emission in the different phase structure area is still controversial. Based on the techniques to solve radiation information acquisition, research the non-uniform radiation characteristics and the mechanism of micro-structure changes under shock pressure range 120 to 220GPa. First, we study the transient luminescence characteristics and the changing rule of sapphire under the regulation of mega-bar pressure using radiation pyrometer and time-resolved spectroscopy. Physical parameters of sapphire such as radiation intensity and radiation temperature will be obtained in different phase structure areas which are obtained with experimental measurements and model analysis. Second, it will be reasonable to explain the mechanism of sapphire shock light emission through the non-uniform thermal radiation model and shear band thermal equilibrium model. It is giving the relationship between the temperature, high pressure structure phase transition and melting line. It will be obtaining a new way about the melting line to limit transparent crystal material phase diagram under high pressure. The results can help to correct shock temperature experimental data and models for metal materials and to understand the shock dynamics for transparent materials. This study has an important application value in the material of Equation of State with high temperature and high pressure, high pressure condensed matter physics and earth science research.