Preparation and Thermal Stability of AlMoON Based Solar Selective Absorption Coating

AlMoON based solar selective absorption coatings were deposited on stainless steel substrate by magnetron sputtering.The coatings included infrared reflection layer Mo,absorption layer AlMoN,absorption layer AlMoON and antireflection layer AlMoO from bottom to top.The surface of the deposited coatings is flat without obvious defects.The absorptivity and emissivity are 0.896 and 0.09,respectively,and the quality factor is 9.96.After heat treatment at 500℃-36 h,the surface roughness of the coating increases,a small number of cracks and other defects appear,and the broken part is still attached to the coating surface.A certain degree of element diffusion occurs in the coatings,resulting in the decline of the optical properties of the coatings.The absorptivity and emissivity are 0.883 and 0.131,respectively,the quality factor is 7.06,and the PC value is 0.0335.The coatings do not fail under this condition and have certain thermal stability.

星载大口径网状天线重力卸载研究

为了模拟星载大口径网状天线在太空中零重力环境下进行组装、试验和测试,需要进行重力卸载。分析了影响星载大口径网状天线重力卸载的因素,介绍了几种重力卸载的方法,并设计了二维动态卸载系统。所做研究可以为星载大口径网状天线的地面零重力模拟提供技术参考。

太阳能选择性吸收涂层的研究进展与应用前景

太阳能作为清洁的可再生能源其储量极其丰富,光热转换技术可实现对太阳能的有效利用。太阳能选择性吸收涂层是光热转换技术的核心。阐述了太阳能选择性吸收涂层的选择性吸收原理,并对太阳能选择性吸收涂层的种类、制备方法以及目前的研究进展进行了介绍,最后提出了太阳能选择性吸收涂层目前仍需解决的问题,并对未来的研究方向进行了展望。

低表面能涂层的应用及研究进展

低表面能涂层是近年来快速发展的涂料体系,通过低表面能涂料制备涂层,此类涂层具备疏水性质。低表面能涂层在超疏水、防覆冰、自清洁、防污、减阻降噪、防腐蚀等领域的研究逐渐深入且具有极为广泛的应用前景。简述了低表面能涂层的理论模型及疏水原理,并对低表面能涂层的不同应用领域进行分类;同时总结了相关领域最新的研究成果,最后提出了低表面能涂层需要解决的问题,并对涂层未来的发展方向做出展望。