請用此 Handle URI 來引用此文件:
http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/76564
標題: | 銅表面改質於熱導管與均熱板內微結構之毛細力提升 Copper Surface Modification on Wick Structures in Heat Pipes and Vapor Chambers: An Improvement on Capillarity |
作者: | Wei-Kong Sheng 盛維康 |
指導教授: | 陳炳煇(Ping-Hei Chen) |
關鍵字: | 表面改質,熱導管,均熱板,溶膠凝膠法,毛細力, surface modification,heat pipe,vapor chamber,sol-gel method,capillarity, |
出版年 : | 2017 |
學位: | 碩士 |
摘要: | 本研究之主旨為透過銅金屬表面改質,提升熱導管與均熱板內導水微結構的毛細力。改質方法分為三種:第一種是藉由溶膠凝膠法配合浸塗法,將二氧化矽奈米粒子均勻塗覆於銅表面上;第二種是使用氧化腐蝕法,將銅表面轉為二氧化銅結構;第三種則是結合前兩種方法的混合改質法,在氧化腐蝕後的表面再行塗佈二氧化矽粒子。實驗分則為三個部份:第一部份為兩平行銅板間平均吸水高度;第二部份為多層編織銅線上的毛細吸水平均爬升速率及吸水淨重;第三部份則為水平靜置之均熱板半成品在單層或雙層平面網狀微結構下水的擴散速率。
第一個實驗結果顯示氧化腐蝕法擁有極高的平均吸水高度,相較於未改質試片在不同間距下提升了42.9%至50.9%不等的靜態吸水高度;第二個實驗顯示二氧化矽奈米粒子的表面改質較氧化腐蝕法之改質表面擁有較高之水爬升速率,但吸水淨重結果則是後者較重,混合改質法則發現爬升速率與吸水淨重皆介於兩者之間;第三個實驗顯示氧化腐蝕法仍較其他兩種方法來得更優異,但與僅經過初步酸洗還原處理的對照組比較後,並無太大優勢。 最後,在結論中將實驗結果與類似之既有物理模型進行比較。除了整理出一個合理的物理詮釋,亦嘗試推論並預測一個更佳的編織方法和改質參數優化。 This study is aimed at applying surface modification on copper to enhance the capillary force of wick structures inside heat pipes and vapor chambers. There are three types of surface modifications: first be the sol-gel method with silicon dioxide (SiO2) nanoparticles being dip coated; second be the hot alkali solution method which oxidize the copper metal into copper oxide (CuO) fine structure; the last one be the hybrid method of the two mentioned above as copper oxide fine structure being covered by SiO2 particles via dip coating method. Experiments of the comparison among the modification methods can be set apart into three sections, which are water static height between two parallel plates, average water rising speed and water net weight on braided copper wire and the last, two dimensional water diffusion rate on semi-finished vapor chamber with one or two meshed-wick layers. The results show that CuO method enhanced static water height between two parallel plates by 42.9% to 50.9%. On braided copper wires, SiO2 method dominates in water rising speed while CuO method performs better at net water weight. The hybrid method performs in between under the two prospects. CuO method performs much better than other two methods involving dip-coating in horizontal water diffusion rate. However, it is only slightly superior to the acid-reduction-only sample. In the conclusion, a brief comparison of the results to their existing theoretical counterparts is made. Besides physical interpretation, prediction for finer tuning on modification parameters and suggestion on braiding pattern are both included. |
URI: | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/76564 |
DOI: | 10.6342/NTU201701656 |
全文授權: | 未授權 |
顯示於系所單位: | 機械工程學系 |
文件中的檔案:
檔案 | 大小 | 格式 | |
---|---|---|---|
ntu-106-R03522325-1.pdf 目前未授權公開取用 | 4.65 MB | Adobe PDF |
系統中的文件,除了特別指名其著作權條款之外,均受到著作權保護,並且保留所有的權利。