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对不同太阳能光热薄膜的热稳定性进行研究,并分析温度诱导的衰老行为.热稳定性初始测试在278℃下分别退火36、75、150、300和600h.最终测试在308℃下退火342 h.薄膜的光学性能通过UV/VIS/NIR分光光度计和FTIR光谱仪分析,微观结构和成分变化由FESEM、XRD分析.结果表明,经退火薄膜出现微裂纹、微孔、起泡和脱落,以及新的氧化相,主要的衰老机制是元素的扩散和氧化.“,”The thermal stability and temperature-induced degradation mechanisms of different solar thermal films were studied and analzsed in this work.The initial tests were annealed at 278 ℃ for 36,75,150,300 and 600 h,respectively.Final annealed is at 308 ℃ for 342 h.The optical properties of the film is analzsed by UV/VIS/NIR spectrophotometer,microstructure,composition analzsed by FESEM,EDS,XRD.The results showed that the main mechanism are diffusion and oxidation,as well as micro-structure,micro-cracks and pores play an important role in the aging process.