原子氧和紫外辐射效应对空间光学系统沸石分子筛吸附性能的影响OA北大核心CSTPCD

Aiming at the problem that the detection quality and service life of high-precision,ultra-low temperature optical instruments or other precision detection instruments are seriously affected by the weak adsorption capacity of molecular sieve materials in the low orbit space environment,the appearances and adsorption properties of zeolite samples of ZSM-5,ZSM-22,MCM-41 and SAPO-11 in a low orbit environment are studied.The results show that atomic oxygen has almost no effect on the adsorption properties of the four kinds of material,while ultraviolet radiation can seriously reduce the adsorption properties of MCM-41,and the absorption ratio is reduced by about 2.44%,the adsorption properties of the other three kinds of material are increased in different degrees after ultraviolet irradiation.Compared with ultraviolet irradiation alone,atomic oxygen and ultraviolet radiation have little effect on MCM-41,but have a greater effect on SAPO-11 and ZSM-5,the adsorption capacity of SAPO-11 and ZSM-5 is significantly enhanced,and the absorption ratio is increased by approximately 1.7%.Finally,the four kinds of material are baked,the results show that the absorption ratio of MCM-41 is restored to that of the original sample after heating,which indicates that the network damage caused by UV irradiation can be improved by baking,so the damage of MCM-41 by UV irradiation can be repaired.Overall,the four kinds of material can be reused by baking.