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本文主要研究制备方法对改变二氧化铅(PbO_2)纳米涂层的太阳光谱吸收选择性的影响。通过恒电流沉积法制备PbO_2纳米涂层,并通过改变制备条件以得出最佳光谱吸收选择性,并对该吸收涂层进行了紫外-可见光谱(Uv-vis),傅里叶红外光谱(FTIR),扫描电子显微镜(SEM),透射电子显微镜(TEM)等对涂层性能和结构进行分析。测试结果显示,在沉积电流在5 mA.cm,沉积时间500s的情况下得到吸收率(α)达到0.9和热发射率(ε)达到0.09的太阳能选择性吸收涂层。涂层的吸收率会随着沉积电流的增加和沉积时间的增加而出现有规律性的变化,是由于电沉积过程中气体的溢出对涂层表面形貌产生了影响,从而导致涂层的光谱性能产生差异。
This paper mainly studies the influence of preparation method on the change of solar spectrum absorption selectivity of lead dioxide (PbO 2) nano-coating. The PbO 2 nano-coating was prepared by constant current deposition method, and the optimal absorption selectivity was obtained by changing the preparation conditions. The UV-Vis and Fourier transform infrared (FTIR) FTIR), scanning electron microscopy (SEM), transmission electron microscopy (TEM), etc. The coating properties and structure were analyzed. The test results show that a solar selective absorbing coating with an absorption (α) of 0.9 and a thermal emissivity (ε) of 0.09 is obtained at a deposition current of 5 mA · cm for a deposition time of 500 s. The absorption rate of the coating changes regularly with the increase of the deposition current and the deposition time, which is due to the influence of the gas overflow on the surface morphology of the coating during the electrodeposition, which leads to the spectrum of the coating Performance differences.