一种基于氧化高熵膜的宽带宽温超疏水热发射器
Broadband and wide-temperature-range thermal emitter with super-hydrophobicity based on oxidized high-entropy film
摘要：
提出了一种基于氧化高熵膜的宽带宽温超疏水热辐射体。退火的（NiCuCrFeSi）O高熵薄膜具有以下三个特点：i）在2.5 μ m ~ 20 μ m的宽带中红外区具有高的类黑体发射; ii）高发射率在300 ~ 1000 K的宽温度范围内，iii）具有151度的高接触角（CA）和5度的低倾斜角（TA）的超疏水性。XRD和SEM/EDX分析结果表明，这些特征源于薄膜的再结晶和退火后形成的具有大量纳米多面体和孔洞的海绵状结构。这一工作可能为热辐射器在相当宽的温度范围内的应用提供新的思路。
英文摘要：
This paper demonstrates broadband and wide-temperature-range thermal emitter with super-hydrophobicity based on an oxidized high-entropy film. The annealed (NiCuCrFeSi)O high-entropy film can serve as a mid-infrared emitter due to its three characteristics: i) High blackbody-like emission in a broadband mid-infrared region from 2.5 um to 20 um; ii) High emittance (more than 90%) in a wide temperature range from 300 K to 1000 K; iii) Super-hydrophobicity with high contact angle (CA) of 151 degree and low title angle (TA) of 5 degree. These characteristics originate from the recrystallization of as-deposited film and formation of cavernous structure with a plethora of nanoscale polyhedrons and holes after an annealing process, supported by the results of XRD and SEM/EDX. This work may provide new ideas for applications of thermal emitters operating at substantially wide temperature range.
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