基于多尺度模拟的航天器用镧锶锰氧热控涂层光吸收性能研究  

Multiscale simulation-based investigation of optical absorption properties of lanthanum strontium manganese oxide thermal control coatings for spacecraft

作　　者：郭昊峰 汪新智 侯光耀 马一高 韩骁 卢松涛 吴晓宏 GUO Haofeng;WANG Xinzhi;HOU Guangyao;MA Yigao;HAN Xiao;LU Songtao;WU Xiaohong(State Key Laboratory of Space Power-Sources,School of Chemistry and Chemical Engineering,Harbin Institute of Technology;School of Materials Science and Engineering,Harbin Institute of Technology:Harbin 150001,China)

机构地区：[1]哈尔滨工业大学化工与化学学院空间电源全国重点实验室 [2]哈尔滨工业大学材料科学与工程学院,哈尔滨150001

出　　处：《航天器环境工程》2025年第2期201-207,共7页Spacecraft Environment Engineering

基　　金：国家重点研发计划项目(编号:2022YFB3806300);国家自然科学基金项目(编号:52371061)。

摘　　要：热控涂层是对航天器进行温度控制的重要手段。通过建立多尺度模拟体系,可以更深入理解新型热控材料的物理化学性质。针对La_(0.75)Sr_(0.25)MnO_(3)(LSMO)热控涂层,文章提出一种结合原子尺度与微纳尺度的多尺度设计方法系统研究其光吸收性能。首先,利用第一性原理计算方法,对LSMO材料的晶体结构进行了优化,并确定了其重要光学常数;然后,采用时域有限差分(FDTD)法对LSMO涂层在不同厚度下的光吸收特性进行了模拟。研究发现,LSMO涂层在太阳光谱区间内展现出高效的光吸收能力;并且当涂层厚度超过1μm时,其光吸收效率达到稳定状态。所做研究为揭示新型镧锶锰氧涂层的光学特性提供了理论支持,对于航天器热控涂层的设计及应用开发具有参考意义。Thermal control coatings serve as an important technology for spacecraft temperature management and regulation.The establishment of a multi-scale simulation framework allows for a deeper understanding of the physical and chemical properties of novel thermal control materials.A multi-scale design approach combining atomic and micro/nano scales has been developed in this study to investigate the optical absorption properties of La_(0.75)Sr_(0.25)MnO_(3)(LSMO)thermal control coatings.Initially,first-principles calculations were employed to optimize the crystal structure of LSMO material and determine its critical optical constants.Subsequently,the finite-difference time-domain(FDTD)method was used to simulate the optical absorption characteristics of LSMO coatings at various thicknesses.The results demonstrate that LSMO coatings exhibit high-efficiency optical absorption across the solar spectrum,and the absorption efficiency reaches a steady state when coating thicknesses exceed 1μm.The simulation methods used in this study provide theoretical support for revealing the optical properties of novel lanthanum strontium manganese oxide coatings,and offer a reference for the design and application development of thermal control coatings for spacecraft.

关 键 词：镧锶锰氧 第一性原理计算 时域有限差分法 光吸收 

分 类 号：V415[航空宇航科学与技术—航空宇航推进理论与工程] TQ172.5[化学工程—水泥工业]