发光示踪材料的空间环境稳定性研究

Space environment effect research on luminescent materials used as the trace marker of spacecraft

通过简单模拟高真空、太阳紫外辐射、冷热交变等空间环境条件,对拟用于飞行器示踪的发光材料SrAl2O4:Eu2+,Dy3+、ZnO:Eu3+,Li1+以及SiO2:Eu3+,Li1+进行了空间环境稳定性试验研究,分别检测了3种材料在高真空条件下的耐强紫外辐射、抗老化、抗热震性能。结果表明,长余辉发光材料SrAl2O4:Eu2+,Dy3+经各试验后发光强度均有一定程度的降低,但由于其自身发光强度很高,下降幅度不影响其在“背日面”的示踪功用;而ZnO:Eu3+,Li1+较SiO2:Eu3+,Li1+的空间环境稳定性比较优越,是适合于“向日面”示踪的发光材料。

Luminescent materials SrAl2 O4 ： Eu^2＋ , Dy^3＋ . ZnO： Eu^3＋ , Lil ＋ and SiO2： Eu^3＋ , Li^1＋ were planed for used as the trace marker of spacecraft. The space environment effects （including high vacuum, ultraviolet irradiation, cold and thermal cycling）on them were investigated. It was demonstrated that ZnO： Eu^3＋ , Li^1＋ shows good space stability so that it is more suit for works as trace marker than SiO2： Eu^3＋ ,Li^1＋ in the＂face to sun＂ side; and the luminescent intensity of SrAl2O4：Eu^2＋ , Dy^3＋ has a little decreased after testing, but it also can be used in the ＂shade of sun＂side.