基于二氧化钒的辐射率可调涂层设计
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中国科学院上海硅酸盐研究所

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TB34

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Structure Design of VO2  ̄Based Multilayer Structure With Tunable Emittance
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    摘要:

    设计了基于VO2的非对称FP 腔薄膜结构的智能热控涂层ꎬ并应用光学模拟计算的方法研究了不
    同膜层厚度对薄膜结构辐射率的影响ꎬ以及辐射率随角度的变化规律ꎮ 计算结果表明ꎬ当相变层VO2层的厚度
    从15 nm 增至120 nm 时ꎬ薄膜结构的辐射率变化Δε 先增加再减小ꎬVO2厚度为50 nm 时ꎬΔε 达到最大ꎬ约为
    0.6ꎮ 介质层HfO2的厚度主要影响多层薄膜结构的高温吸收带位置ꎬ但Δε 在HfO2层厚度为800~1 000 nmꎬ均
    可达到约0.6 的最大值ꎮ 多层薄膜结构在0°~ 70°ꎬ仍保持明显的辐射率变化ꎬΔε 在0.4 以上ꎮ

    Abstract:

    In present studyꎬ a multilayer structure comprised of VO2 layer was designed to achieve tunable emit ̄
    tance based on the principle of asymmetric Fabry ̄Perot (FP) cavity. Influence of thickness of different layers constitu ̄
    ting the multilayer structure on its emittance property and the angle dependence of the emittance were investigated u ̄
    sing the method of optical simulation computation.It is found that the variation of the emittance Δε increased first and
    then decreased with the thickness of VO2 increasing from 15 nm to 120 nm and the Δε reached a maximum at 50 nm
    of VO2 film. While the thickness of HfO2 layer influenced the position of absorption band of the multilayer structure
    and the Δε remained around the maximum of 0.6 at the wide range of thickness of HfO2 from 800 nm to 1 000 nm.
    The calculation for emittance of the multilayer structure at varied angles indicates that significant Δε of above 0.4
    could be remained in a wide range of angles from 0° to 70°.

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闫 璐1 王 孝1 曹韫真1 沈自才2.基于二氧化钒的辐射率可调涂层设计[J].宇航材料工艺,2016,46(3).

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  • 在线发布日期: 2016-11-28
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