NiSiO2太阳光谱选择吸收涂层的设计制备及热稳定性研究

Optical design and thermal stability of NiSiO_2 solar selective absorbing coating

采用软件模拟辅助实验的方式制备了新型Al/NiSiO_2(M)/NiSiO_2(D)/SiO_2太阳光谱选择吸收涂层,并对其热稳定性进行了研究。使用磁控溅射技术,通过改变氧气(O_2)流量制备了一系列NiSiO_2膜层,研究了O_2流量对膜层光学性能的影响,并使用光学模拟软件对涂层进行设计和优化。根据模拟优化结果在不锈钢基底上成功制备了Al/NiSiO_2(M)/NiSiO_2(D)/SiO_2光谱选择吸收涂层,其吸收率(α)为0.933,400℃下的发射率(ε)为0.14。涂层在空气中450℃高温下热处理100h后,其吸收率与发射率之比(α/ε)由6.66上升至7.62,依然保持着较高的光谱选择性,表明涂层具有较好的热稳定性。

A new Al/NiSiO 2(M)/NiSiO 2(D)/SiO 2 solar selective absorbing coating were carried out by combining experiments with optical simulation.A series of NiSiO 2 single layers were deposited by using magnetron reactive sputtering method with different O 2 gas flowing rates,and the solar absorbing coating was designed and optimized by using optical software.The result indicates that the coating deposited on the stain steel substrate exhibits high absorptance(0.933)and low emittance(0.14)at 400℃.The coating exhibits good thermal stability after aging at 450℃for 100 h in air.After aging at 450℃in air for 100 h,the ratio of absorptance and emittance(α/ε)of the coating increases from 6.66 to 7.62,the result shows that the coating has good thermal stability.