輻射冷卻裝置為抑制太陽輻射熱吸收，同時將物體熱能透過大氣窗波段(8 μm – 13 μm)向外太空傳遞，過程中不需耗費任何能量。本研究將利用不同電壓、溫度、時間之陽極處理方式製作陽極氧化鋁膜(anodic aluminum oxide, AAO)輻射冷卻裝置，並探討上述不同製程下樣本輻射冷卻效果。本研究藉由半球輻射性質量測系統與日照實驗，量測樣本於波長0.4 μm – 13 μm區間放射率與實際降溫效果，以驗證樣本效果。成果中發現，表面樹枝狀結構(非一般孔洞結構)之AAO可將大氣窗波段放射率由原先趨近於0提升至0.8。實際降溫效果中，樹枝狀結構之AAO不論在日間或夜間中皆顯現其具備良好之降溫效果。再進一步分析，本研究以樹枝狀樣本之厚度以及SEM所得之孔洞週期輸入有限差分時域法中，針對在大氣窗波段中特殊放射率峰值與谷值，探討其電磁場分佈，佐證其輻射冷卻物理機制。

Radiative cooling devices is used to decrease radiative heat absorption and dissipate the heat of the object through the atmospheric window (8 μm – 13 μm) to outer space without any energy consumption. This study use different anodizing voltage, temperature, and anodizing time to make a new anodic aluminum oxide (AAO) radiative cooling device. The hemispherical radiative properties (0.4 μm – 13 μm) and temperature (sunshine exposed) of AAO samples are measured during experiment to analyze the effects on samples. The hemispherical radiative and temperature result shows that branch shaped surface AAO can enhance the emissivity in the atmospheric window from 0 to 0.8 and decrease the temperature below the control group during day and night both. Furthermore, this study also used Finite Difference Time Domain method (FDTD) to simulate branch shaped surface AAO electromagnetic field distribution. The electromagnetic field distribution result show some special phenomena in the AAO surface which improved the cooling ability.

摘要----------------------------i
Abstract------------------------ii
致謝----------------------------iii
目錄----------------------------iv
圖目錄--------------------------vii
表目錄--------------------------x
符號表--------------------------xi
第一章 緒論---------------------1
1.1 研究背景--------------------1
1.2 研究動機--------------------3
1.3 研究目標--------------------3
第二章 理論基礎-----------------5
2.1大氣窗波段與輻射冷卻----------5
2.2陽極氧化鋁膜-----------------6
第三章 材料與方法----------------8
3.1基板與電解液-----------------8
3.2實驗設置與步驟---------------8
3.2.1實驗設置-------------------8
3.2.2實驗步驟-------------------9
3.3半球輻射性質量測設備----------12
3.3.1短波長量測系統-------------12
3.3.2長波長量測系統-------------14
3.4日照實驗平台-----------------15
第四章 數值模擬-----------------17
4.1 Multi-layer材料參數設置-----17
4.2 FDTD模型設置----------------18
第五章 結果與討論----------------22
5.1樣本表面形貌-----------------23
5.1.1第一批次樣本---------------23
5.1.2第二批次樣本---------------24
5.1.3第三批次樣本---------------25
5.2輻射性質量測-----------------27
5.2.1第一批次樣本---------------27
5.2.2第二批次樣本---------------28
5.2.3第三批次樣本---------------29
5.3日照實驗---------------------31
5.3.1第一批次樣本---------------31
5.3.2第二批次樣本---------------32
5.3.3第三批次樣本---------------34
5.4數值模擬結果-----------------36
5.4.1Multi-layer鋁膜厚度回推----37
5.4.2 FDTD分析電磁場分佈--------38
第六章 結論與未來工作------------44
6.1結論-------------------------44
6.2未來工作---------------------45
參考文獻------------------------47

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