ZnO白漆的空间环境效应及损伤机理  

Space Environmental Effects and Damage Mechanism of ZnO White Paint

作　　者：姜海富[1,2] 郑慧奇 李宇[1] 刘宇明[1,2] 姜利祥[1,2] JIANG Haifu;ZHENG Huiqi;LI Ya;LIU Yuming;JIANG Lixiang(Beijing Institute of Spacecraft Environment Engineering,Beijing 100094,China;Science and Technology on Reliability and Environmental Engineering Laboratory,Beijing 100094,China)

机构地区：[1]北京卫星环境工程研究所,北京100094 [2]可靠性与环境工程技术国防科技重点实验室,北京100094

出　　处：《硅酸盐学报》2025年第1期10-15,共6页Journal of The Chinese Ceramic Society

基　　金：国家重点研发计划(2022YFF0503602)。

摘　　要：为揭示ZnO白漆空间环境作用损伤机理,优化材料性能,采用空间环境辐照实验对ZnO颜料及硅酸钾包覆的氧化锌(KSZ)白漆空间环境效应及损伤机制进行了研究。电子、质子、紫外及原子氧作用后,ZnO颜料在425 nm左右产生了吸收峰,ZnO颜料中双电离锌空位(V_(Zn)^(2-))在电子、质子、紫外辐照下发生电离,生成单电离锌空位(V'_(Zn)^(-))是光学性能退化的主要机制,而原子氧作用使得V_(Zn)^(2-)极少一部分转化为V'_(Zn)^(-),大部分转化为未电离锌空位(V_(Zn)^(0))。相对于紫外及原子氧辐照,质子和电子辐照对KSZ白漆性能影响较大。在质子剂量3.15×10^(16)p/cm^(2)、电子剂量2.25×10^(16)e/cm^(2)、紫外剂量5000当量太阳小时条件下,KSZ涂层太阳吸收比由0.12增加至0.27。Introduction ZnO inorganic white paint is composed of ZnO pigment and a potassium silicate binder as a type of thermal control coating of spacecraft.It is commonly used for spacecraft antennas,cabin sections,and radiator surfaces.In general,the solar absorptance of ZnO inorganic white paint is lower than that of other thermal control coatings.ZnO mainly exists in the form of wurtzite structure,and its zinc oxygen ratio often deviates from stoichiometry,generating intrinsic defects internally.Oxygen deficient compounds are generally generated due to the easy escape of oxygen in zinc oxide.During the in-orbit service of spacecraft,ZnO inorganic white paint is subjected to space environmental effects,such as electrons,protons,ultraviolet(UV),and atomic oxygen(AO),resulting in its performance degradation and affecting the stable service of spacecraft in orbit.It is thus necessary to investigate the degradation and damage mechanism of ZnO inorganic white paint to support the optimization of material properties.Methods ZnO pigment sample was a circular flake powder,which was pressed into a grinding tool with an inner diameter of 25 mm using a machine.The pressure parameter is 10 kN and the pressure time is 5 min.A circular sample with potassium silicate-coated zinc oxide(KSZ)inorganic white paint with a diameter of 30 mm,composed of K_(2)Si O_(3) binder and ZnO pigment was prepared on an aluminum substrate by a spray coating process.Space environmental irradiation experiments were conducted on ZnO pigments and KSZ coatings by environmental irradiation and low orbit AO equipment.The electron energy of ZnO pigment irradiation experiment is 50 keV,with a fluence of 1×10^(16)cm^(–2),a proton energy is 50 keV,with a fluence 6×10^(15)p/cm^(2) and the UV dose is 5000 ESH.The AO fluence is 1×10^(21)atoms/cm^(2).The electron and proton energies of KSZ irradiation experiment are the same as those in the ZnO pigment experiment,with fluence of2.25×10^(16)e/cm^(2) and 3.15×10^(16)p/cm^(2),respectively.The UV dose is 5000 ESH

关 键 词：氧化锌白漆 空间环境 损伤机理 太阳吸收比 

分 类 号：V524.3[航空宇航科学与技术—人机与环境工程] V255[一般工业技术—材料科学与工程]