臺灣博碩士論文加值系統

本研究在探討人造以及不同厚度的天然高導熱石墨片之熱傳特性。實驗部分以Angstrom’s method為基礎，架設熱擴散係數量測設備。測得於室溫環境下，人造石墨片之熱擴散係數約為(8.24±0.93) x 10 -4 m2/s，而天然石墨片測得值約介於(2.04±0.26) x 10 -4至(2.67±0.17) x 10 -4 m2/s之間，且經實驗誤差分析後，發現以此方法建立之設備，量測誤差約為±10%左右。以電子磅秤進行重量之量測而得到密度，以及示差掃描熱量分析儀(DSC)進行比熱量測之後，綜合密度及比熱即可得樣本之熱傳導係數。結構分析部分，以光學顯微鏡(OM)、掃描式電子顯微鏡(SEM)以及穿透式電子顯微鏡(TEM)，進行表面結構、分子結構之觀測分析。綜合本研究實驗結果以及微奈米觀測分析出，人造石墨片之碳結構能有較好之晶格特性以及石墨純度，因此相較天然石墨片能有較高的熱擴散係數。

This paper aims to investigate thermal conductivity properties originated between artificial and different thicknesses natural high thermal conductivity graphite sheets. The Angstrom’s method was used to establish a thermal diffusivity measurement instrument. The experimental results showed the room temperature thermal diffusivity of artificial graphite sheet is about (8.24±0.93) x 10^-4 m^2/s, and the values of natural graphite sheets are in the range (2.04±0.26) x 10^-4 to (2.67±0.17) x 10^-4 m^2/s. The experimental results also showed the error within ±10% by the uncertainty analysis. The graphite sheet densities and specific heat were measured by an electronic balance and differential scanning calorimetry (DSC). Combining the thermal diffisivity, density, and specific heat, the thermal conductivity can be obtained. Optical microscope (OM), scanning electron microscopy (SEM) and transmission electron microscopy (TEM) were used to observe and analyze the graphite sheets surface and atomic structures. The experimental result and micro/nano observation showed that carbon structures of artificial graphite sheets are well arranged in lattice and high purity. That results in a better thermal conductivity than natural graphite sheets.

摘要 i
Abstract ii
目錄 iii
圖目錄 iv
表目錄 vi
第一章 緒論 1
1.1前言 1
1.2 研究動機與目的 1
1.3 研究方法與目標 2
1.4 文獻回顧 3
1.4.1 石墨片材料相關研究 3
1.4.2 熱擴散係數量測之研究 4
1.5 論文架構 15
第二章 研究基礎理論與原理 16
2.1 熱擴散係數量測 16
2.2 熱擴散係數量測誤差分析 17
2.3 石墨片比熱量測 20
第三章 實驗設計與規劃 22
3.1實驗方法 22
3.2 實驗步驟 24
第四章 實驗結果與量測分析 26
4.1 熱擴散係數量測結果 26
4.2 熱擴散係數量測誤差分析 33
4.3 石墨片比熱量測結果 34
4.4 推論熱傳導係數及比較 37
4.5 石墨片表面形貌量測 39
4.5.1 光學顯微鏡量測結果 49
4.5.2 掃描電子顯微鏡量測結果 41
4.5.3 穿透式電子顯微鏡量測結果 46
4.6 石墨片截面形貌量測 47
第五章 結論與未來展望 50
5.1 結論 50
5.2 未來展望 51
參考文獻 52
附錄 54

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