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論文名稱 Title |
銀基氧化鋁複合電氣接點材料之研發 Research and Development for Electric Contact Materials of Silver Matrix Alumina |
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系所名稱 Department |
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畢業學年期 Year, semester |
語文別 Language |
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學位類別 Degree |
頁數 Number of pages |
134 |
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研究生 Author |
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指導教授 Advisor |
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召集委員 Convenor |
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口試委員 Advisory Committee |
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口試日期 Date of Exam |
2002-06-22 |
繳交日期 Date of Submission |
2002-06-28 |
關鍵字 Keywords |
複合材料、銀、轉移損耗量、氧化鋁、損耗機制、接點、混合 silver, erosion mechanism, composite, erosion amount, alumina, mix, contact |
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統計 Statistics |
本論文已被瀏覽 5663 次,被下載 3472 次 The thesis/dissertation has been browsed 5663 times, has been downloaded 3472 times. |
中文摘要 |
摘要 隨著高科技的發展以及國際環保的日趨嚴格規範,以往具有最佳接點性能之銀-氧化鎘複合材料,因有鎘氣致癌的疑慮將被禁用,因此本研究將開發與銀-氧化鎘接點性能相當且價格便宜的新接點材料。 本研究內容以銀粉(粒徑2~4μm)添加氧化鋁粉末(粒徑0.5μm),經由自行開發之混合機加以混合均勻後,以粉末冶金法製成電氣接點試片。並使用開閉接點試驗機、靜態接點試驗機和掃描式電子顯微鏡探討在供應電壓、電流、定間隙及混合條件下,接點轉移損耗量、電弧能量和接觸電阻值以及損耗機制。結果發現在氧化鋁含4%wt時,有最佳的接點性能,且與市售不同接點之性能比較,發現銀基氧化鋁接點有良好的接點性能。 |
Abstract |
Abstract With the development of new technology and the stringent requirement for the international environmental regulation, the silver-oxide cadmium composites with the best contact performance will be prohibited due to the anxiety to cause cancer. Therefore, this study intends to develop a new contact materials with the best contact performance and cost. This study intends to use the silver powder (2~4μm) as the major component, and the alumina ceramic powders (0.5μm) as the minor component. The self-development mixer is used to uniformly mix silver powder with alumina powder, and then the powder metallurgy is used to make the electric contacts. Under the supply voltage and current, as well as the mixing conditions, the contact erosion amount, the arc energy, and the contact resistance are measured to investigate the erosion mechanism. Results show that the electric contact with 4%wt alumina ceramic powder has the best performance. Furthermore, the new electric contacts of silver base alumina composite material appear the acceptable performance compared with the commercial electric contacts. |
目次 Table of Contents |
總 目 錄 頁次 中文摘要 i 總目錄 ii 圖目錄 v 表目錄 xi 第一章 緒論 1 1-1 研究動機 1 1-2 文獻回顧 4 1-2-2 接點材料損耗及轉移 6 1-2-3 接點材料的特性 8 1-3 本文重點…………………………………………………….10 第二章 混伴基本原理與電弧形成原理 11 2-1 超微粒子的介紹 11 2-1-1 超微粒子 11 2-1-2 次粒子與2次粒子 11 2-1-3 超微粒子的特性 12 2-2 混合技術 12 2-2-1 粉體混合概論 12 2-2-2 混合機制 13 2-2-3 兩種混合物之排列狀態 16 2-2-4 影響粉末混合的因素 18 2-2-5 粉末混合之方法 19 2-3 電弧形成原理與種類 25 2-3-1 長間隙之氣體崩潰 25 2-3-2 電弧放電的過程 28 2-3-3 架橋(bridge)的形成 30 2-3-4 開離電弧的形成 30 2-3-5 閉合電弧的形成 34 第三章 實驗設備與方法 35 3-1 實驗設備 35 3-1-1 接點試片製作 38 3-1-2 動態接點試驗 43 3-1-3 靜態微間隙接點試驗 50 3-2 銀基氧化鋁接點 54 3-2-1 試片製作的材料及藥品 54 3-2-2 粉末冶金 55 3-3 實驗材料 61 3-3-1 接點試片尺寸及其材料特性 61 3-3-2 試片處理 64 3-4 實驗條件 68 3-5 實驗步驟 70 第四章 實驗結果與討論 74 4-1 混合均勻度的辨識 74 4-2 乾、濕式混合結果 75 4-3 添加不同分散劑對混合均勻度的影響 84 4-4 不同均勻度之銀基氧化鋁接點試片損耗的再現性 90 4-5 添加氧化鋁對銀接點燒結的影響 94 4-6 自行開發接點混合結果與市售接點混合結果之比較 95 4-7 不同氧化鋁含量的銀基接點之動態接點試驗結果與討論 103 4-8 銀基氧化鋁接點與市售常用接點之動態接點試驗結果 110 4-9 銀基氧化鋁接點與市售常用接點之靜態接點試驗結果討論 115 第五章 結論 128 參考文獻 130 |
參考文獻 References |
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