旋流雾化火焰合成热控涂层材料实验研究

Swirling Spray Flame Synthesis of Thermal Control Coating Material

本文针对Y_(2)O_(3)热控涂层材料,开展旋流雾化火焰合成实验研究。借助相机和PDA光学诊断技术解析了喷嘴雾化特性,进而获得粒径小且分布集中的液滴雾化效果,并在此基础上开展合成实验。所合成的颗粒结晶良好,属于稳定立方相Y_(2)O_(3),颗粒平均粒径小于13 nm,具有清晰的(222)晶面。进一步的热辐射特性测试结果表明,该方法制备的纳米粉体具有极低的太阳吸收比(α_(S)=0.062)和吸收发射比(α_(S)/ε=0.0756),在未来航天器热控涂层上具有很大应用潜能。

In this paper,we utilize swirling spray flame synthesis method to prepare Y_(2)O_(3)nanomaterials for the application of thermal control coating.Based on the optical diagnosis technology such as camera imaging and PDA,the atomization characteristics of nozzle are analyzed,and then a good atomization with small-size droplets and concentrated distribution is obtained.Under this condition,the as-synthesized nanoparticles have a well cubic Y_(2)O_(3)crystal phase,with an average diameter of less than 13 nm and an obvious(222)crystal lattice.Further thermal radiation characterization results show that the sample prepared by this method has extremely low solar absorption ratio(α_(S)=0.062)and absorption emission ratio(α_(S)/ε=0.0756),which means that it has a great application potential in the thermal control coating for spacecraft in the future.