Solar selective black cobalt: preparation, structure, and thermal stability
Solar selective black cobalt: preparation, structure, and thermal stability
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DOI：
10.1063/1.328276
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发表时间：
1980-08
影响因子：
3.2
通讯作者：
Geoffrey B. Smith;A. Ignatiev;G. Zajac
中科院分区：
文献类型：
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作者：
Geoffrey B. Smith;A. Ignatiev;G. Zajac
在寻求在空气中稳定至500 °C的电镀选择性黑色涂层的过程中，已经通过三种技术制备了黑钴，以产生（a）电镀的硫化钴，（B）电镀的氧化钴-氢氧化物，和（c）通过热氧化电镀的钴金属制备的氧化钴。在300 °-500 °C范围内的温度下长时间暴露于空气之前和之后，分析了各种涂层的光学特性。由于严重的热降解，硫化物黑钴不能作为高温选择性吸收剂。电镀氧化物在400 °C左右是一种很好的选择性吸收剂，而热氧化炭黑在稍高的温度下是一种很好的选择性吸收剂，但在500 °C时会降解。报告了通过扫描电子显微镜（SEM）、俄歇电子能谱（AES）和X射线光电子能谱（XPS）进行的结构研究，这些研究充分说明了加热前后的涂层化学。研究表明，该材料具有较高的太阳吸收率。
In the quest for an electroplated selective black coating stable to 500 °C in air, black cobalts have been prepared by three techniques to yield (a) plated cobalt sulphides, (b) plated cobalt oxide‐hydroxide, and (c) cobalt oxide prepared by thermal oxidation of electropolated cobalt metal. The optical properties of the various coatings are analyzed before and after exposure to air for extended periods of time at temperatures in the 300 °–500 °C range. The sulfide black cobalt is not acceptable as a high‐temperature selective absorber due to severe thermal degradation. The plated oxide is a good selective absorber to about 400 °C, and the thermally oxidized black to a slightly higher temperature, but degrades at 500 °C. Structure studies via scanning electron microscopy (SEM), Auger electron spectroscopy (AES), and x‐ray photoemission spectroscopy (XPS) are reported which yield a full account of the coating chemistry before and after heating. The studies reveal that the high solar absorptance of the accep...