基于太阳能选择性吸收的光致发光型铁电陶瓷/TiC基金属陶瓷复合薄膜的研究

The solar selective absorption film is one of the important energy materials, which the photo-thermal conversion performance directly determines the heat utilizing efficiency of solar energy. However, the thermal stability of the film restricts its own development and application, which is now the bottleneck problem in the medium-high temperature field. This project targets at the solar absorbing film with the excellent properties in the medium-high temperature field, takes the new photo-luminescence ferroelectric ceramic / TiC basedceramet composite film as the research object. In order to clarify the mechanism of the effect of luminescent frequency and intensity on the ferroelectric ceramics doped rare earth and other element, the light absorbing coupling effect of new absorption film photo-luminescence is explored by combining of theory and experiment. Thus, the coupling effect of the ceramet film should be taken effective regulation and control. Then the effect of photo-thermal conversion properties and thermal stability of solar selective absorption film are studied by multiscale metal and ceramic, which reveals not only the interaction of multiscale metal and ceramics but also the mechanism of optical absorption. This project means to prepare the new absorbing film with excellent photo-thermal conversion performance, excellent mechanical properties and low cost by using the coating method and coating method-laser cladding technology. It aims to research on the thermal stability of solar selective absorption film and lay a scientific and theoretical foundation for the heat utilization of solar energy, which is extending to the medium-high temperature field.

太阳能选择性吸收薄膜是一种重要的能源材料，该薄膜的光热转换性能直接决定太阳能热利用效率。但性能的热稳定性是其在中高温领域的瓶颈问题，严重制约中高温太阳能薄膜发展及应用。本项目以研究性能优异的中高温太阳能吸收薄膜为目标，将新型光致发光型铁电陶瓷/碳化钛基金属陶瓷复合薄膜作为研究对象，采用理论与实验相结合的方法，探索新型吸收薄膜光致发光-光吸收耦合作用，明晰稀土及其它元素掺杂对铁电陶瓷发光频率及强度的影响机制并对其与金属陶瓷薄膜的耦合效应进行有效调控；研究多尺度金属和陶瓷对太阳能选择性吸收薄膜光热转换性能及热稳定性的影响，揭示多尺度金属—陶瓷的相互作用及光吸收机理；利用涂覆法及涂覆法—激光熔覆技术制备新型吸收薄膜，获得高温光热转换性能及力学性能优异且成本较低的薄膜。本项目旨在研究新型太阳能选择性吸收薄膜性能的热稳定性并为太阳能热利用拓展到中高温领域奠定科学理论基础。

太阳能选择性吸收薄膜是一种重要的能源材料，该薄膜的光热转换性能直接决定太阳能热利用效率。但性能的热稳定性是其在中高温领域的瓶颈问题，严重制约中高温太阳能薄膜发展及应用。本项目以研究性能优异的中高温太阳能吸收薄膜为目标，将新型光致发光型铁电陶瓷/碳化钛基金属陶瓷复合薄膜作为研究对象，采用理论与实验相结合的方法，探索新型吸收薄膜光致发光-光吸收耦合作用，明晰稀土及其它元素掺杂对铁电陶瓷发光频率及强度的影响机制并对其与金属陶瓷薄膜的耦合效应进行有效调控；研究多尺度金属和陶瓷对太阳能选择性吸收薄膜光热转换性能及热稳定性的影响，揭示多尺度金属—陶瓷的相互作用及光吸收机理；利用涂覆法及涂覆法—激光熔覆技术制备新型吸收薄膜，获得高温光热转换性能及力学性能优异且成本较低的薄膜。本项目旨在研究新型太阳能选择性吸收薄膜性能的热稳定性并为太阳能热利用拓展到中高温领域奠定科学理论基础。. 研究发现，利用激光熔敷制备单层多尺度金属陶瓷选择吸收涂层，其光热性能优越，吸收率达到86%，发射率为4%，其光热转化效率达到21（吸收率/发射率）；特别是，该涂层具有极为优异的热稳定性能，经过650℃退火200小时，其吸收率和发射率分别为85%，4.7%。因此，该体系涂层适用于中高温太阳能热利用领域。此外，通过该项目的研究，首次利用激光熔覆制备太阳能选择性吸收涂层，丰富了该领域涂层制备技术，为制备性能优越的太阳能吸收涂层提供有益的探索。