本研究的目標為利用電弧汽化法製備奈米級氧化鋁粉末，為取代目前工業上所使用的化學法與物理法以降低生產成本，氣相的鋁與氧氣反應快速，能快速氧化釋放其氧化熱，而鋁蒸氣的製造需高溫能量來源，其能量來源可為熱電漿、電阻熱及電弧等[38-40]。以電弧作熱源為例，2006年C. Chazelas等人利用電漿轉移弧汽化鋁塊材[38]，但其實驗無法持續加熱鋁塊塊材，造成能量損失，並無法大量生產。
本實驗以自行設計的粉末製備機利用電弧汽化法，將送入的鋁線經局部高溫汽化後與周圍氣體反應生成粉末，在鋁線持續送入當作電弧反應的陰陽極，使得反應能夠連續進行，並大量的生產。收集反應後生成之粉末去分析，了解到本實驗製備出的粉末為奈米級球形氧化鋁粉末，粉末粒徑約在15-200 nm之間，而大部分的粉末為γ- Al2O3。
將電弧法製備之氧化鋁粉末以及市售氧化鋁粉末3 μm (BUEHLER)、0.3 μm (GREATEN)、00.5 μm (BUEHLER)以1390 ℃持溫燒結4小時燒結後，比較其性質，自製粉末之機械性質能與00.5 μm (BUEHLER) 相當。

Aluminum-oxidation-energy powered engine has attracted our interest in replacing conventional engine powered by liquid fuel. This attraction is due to the high energy density and the reduction of carbon dioxide emission in the combustion of aluminum wires. During this process, we find that the arc-evaporation method can produce alumina nanopowder. Besides, the arc-evaporation method can reduce the production cost in comparison with traditional process.
We design a new equipment to produce alumina nanopowder by the arc-evaporation method. First, it uses the heat which is produced by the arc-evaporation method to evaporate aluminum wire. And the aluminum gas reacts with oxygen to form alumina powder. Then, we analyze the collected powder, finding that the spherical particles produced from the combustion of aluminum wires are several hundreds of nanometers in diameters. Most of the powder is gamma-alumina.

Abstract I
摘要 III
目錄 VI
圖目錄 X
表目錄 XVII
壹、 前言 1
貳、 文獻回顧 3
2.1 氧化鋁的基本介紹 3
2.1.1 氧化鋁背景簡介 3
2.1.2 氧化鋁的結構與性質 3
2.2 氧化鋁粉末之製備方法 11
2.2.1 機械球磨法 14
2.2.2 氣相反應法 15
2.2.3 沉澱法 16
2.2.4 溶膠凝膠法 17
2.2.5 燃燒法 18
2.3 電弧消耗線材 20
2.3.1 電弧放電特性與起弧方式 20
2.3.1.1 電弧放電特性 20
2.3.1.2 電弧的伏安特性 24
2.3.1.3 起弧方式 27
2.3.2 電流對液滴傳遞方式的影響 28
2.4 鋁的氧化機制 35
2.4.1 鋁蒸氣的氧化機制 35
2.4.2 鋁顆粒及鋁液滴的氧化機制 38
參、 實驗方法 44
3.1 實驗流程 44
3.1.1 實驗手法及細節 45
3.1.1.1 粉末製備機台 45
3.1.2 粉末燒結及性質測量 46
3.1.2.1 濕式球磨 46
3.1.2.2 過篩及生胚成型 46
3.1.2.3 試片燒結 46
3.1.2.4 燒結試片緻密度量測 47
3.1.2.5 燒結試片硬度及韌性量測 48
3.1.2.6 熱傳導係數量測 49
3.1.3 實驗儀器 50
3.1.3.1 電弧反應粉末製備機 50
3.1.3.2 氬焊機 52
3.2 性質測量及其他分析 53
3.2.1 X光繞射分析儀(XRD) 53
3.2.2 掃描式電子顯微鏡(SEM) 53
3.2.3 雷射粒徑分析儀 54
肆、 結果與討論 55
4.1 粉末製備之參數 55
4.1.1 送線速度調整 55
4.1.2 高週波起弧 57
4.1.3 氣體流率調整 57
4.2 粉末製備機電極之設計 58
4.2.1 V型長筒石墨杯及石墨杯外罩設計 60
4.2.2 V型石墨杯口徑加大型設計 64
4.2.3 上電極氣氛保護罩設計 68
4.2.4 V型石墨杯長度加長型設計 72
4.2.5 氧化鋯電流集中設計 76
4.2.6 石墨杯電流集中設計 80
4.2.7 上下電極石墨杯電流集中設計 84
4.3 電弧反應製成粉末之分析 88
4.3.1 粉末之XRD分析 90
4.3.2 粉末之SEM以及粒徑分析 91
4.4 粉末燒結之分析 104
4.4.1 硬度、韌性、理論密度及導熱度測量 105
4.4.2 X光繞射分析儀(XRD) 109
伍、 結論 110
陸、 研究貢獻 112
柒、 未來研究方向 113
捌、 參考文獻 114

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