ZnO/SBA-15无机热控涂层填料及涂层性能
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北京卫星制造厂有限公司,北京 100190

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TG174.44

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The Performance of Inorganic Thermal Control Pigment and Coatings Based on ZnO/SBA-15
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Beijing Spacecrafts, Beijing 100190

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    摘要:

    开展高紫外-可见-近红外反射能力热控填料的制备,研制新型低吸收比(αS)高发射率(εH)无机热控涂层。以自制SBA-15和ZnO前驱体为原料通过溶剂热浸渍和高温煅烧法制备ZnO/SBA-15填料,然后与硅酸钾(K2SiO3)制备无机热控涂层;采用SAXD、XRD、 SEM、太阳反射光谱分析填料和涂层的性能。结果显示采用硝酸锌作为前驱体、m(ZnO)∶m(SBA-15)=3∶7、950 ℃下烧结3 h可以得到高紫外-可见-近红外反射能力的填料;ZnO/SBA-15/K2SiO3无机涂层的αS为0.09,εH为0.91,涂层结合力等级为1级,经过100次-196~100 ℃热循环实验后,涂层无脱落和开裂现象。SBA-15改性ZnO可以获得具有高紫外反射率和低αS的热控填料,ZnO/SBA-15填料制备的无机热控涂层同样具备高紫外反射率、低αS和高εH,可以满足航天器高效散热的需求,应用前景良好。

    Abstract:

    The work aims to develop a new type of low absorption (αS) high emissivity (εH) inorganic thermal control coating, and to study inorganic thermal control pigments with high UV-VIS - NIR reflectivity. Using self-made SBA-15 and ZnO precursors as raw materials, ZnO/SBA-15 fillers were prepared by solvothermal impregnation and high-temperature calcination, and then fillers and potassium silicate (K2SiO3) were used to prepare inorganic thermal control coatings.SAXD, XRD, SEM, solar reflectance spectroscopy were used to analyze the performance of fillers and coatings. The results showed that using zinc nitrate as the precursor,m(ZnO)∶m(SBA-15)=3∶7, sintered at 950 ℃ for 3 h to obtain ZnO/SBA-15 pigment with high UV-visible-near infrared reflectance. The test of ZnO/SBA-15/K2SiO3 inorganic coating shows that the αS is 0.09, εH is 0.91. Through the cross-cut test, it is known that the adhesion level of the coating is level 1. After 100 thermal cycle experiments at -196~100 ℃, the coating did not fall off or crack. It means that SBA-15 modify ZnO can obtain thermal control pigments with high UV reflectivity and low αS. The inorganic thermal control coating prepared with ZnO/SBA-15 powder as a pigment also has high ultraviolet reflectance, low αS and high εH, which can meet the needs of spacecraft for efficient heat dissipation and has a good application prospect.

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张东,张立功,张有玮,张家强,孟腾. ZnO/SBA-15无机热控涂层填料及涂层性能[J].宇航材料工艺,2021,51(5):108-114.

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  • 收稿日期:2021-03-10
  • 最后修改日期:2021-07-07
  • 录用日期:2021-06-22
  • 在线发布日期: 2021-10-26
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