Abstract Thermal expansion performance of Aluminum/polysiloxane/glass coatings with low infrared emissivity was improved by adding zinc powder. The influences of zinc powder on phase structure, composition, surface microstructure, thermal expansion, adhesion and infrared radiation of Aluminum/polysiloxane/glass coating was systematically studied. The thermal mechanical analysis indicated that thermal expansion coefficient can be adjusted by adding zinc powder in the coating. The tensile strength test results show that the matching of the thermal expansion could improve the adhesion strength of the coatings. As a result, compared with the coating without zinc powder, the adhesion strength was enhanced by 2.0 ± 0.4 MPa when the heat treatment temperature at 450 and 500 °C, and increased by 3.0 ± 0.4 MPa at 550 °C. Simultaneously, average infrared emissivity value of the coating with good thermal stability was about 0.20 in the 3–5 μm wavebands, and approximately 0.34 within 8–14 μm after heated at 550 °C. These results indicated that the good thermal expansion performance and low infrared emissivity coatings were obtained by adding zinc powder.

中文翻译：

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锌粉改善低红外辐射铝/聚硅氧烷/玻璃涂层的热膨胀性能

摘要 锌粉的加入提高了低红外辐射铝/聚硅氧烷/玻璃涂层的热膨胀性能。系统研究了锌粉对铝/聚硅氧烷/玻璃涂层的相结构、组成、表面微观结构、热膨胀、附着力和红外辐射的影响。热力学分析表明，在涂层中加入锌粉可以调节热膨胀系数。拉伸强度测试结果表明，热膨胀的匹配可以提高涂层的附着强度。结果表明，与不含锌粉的涂层相比，热处理温度在450℃和500℃时提高了2.0±0.4MPa，在550℃时提高了3.0±0.4MPa。同时地，具有良好热稳定性的涂层的平均红外发射率值在 3-5 μm 波段约为 0.20，在 550°C 加热后在 8-14 μm 范围内约为 0.34。这些结果表明，通过添加锌粉获得了良好的热膨胀性能和低红外发射率的涂层。