N型鎂矽錫熱電材料之製程開發

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姓名

李定洲(Ting-Chou Li) 查詢紙本館藏

畢業系所

電機工程學系

論文名稱

N型鎂矽錫熱電材料之製程開發
(Process Innovation of N-type Mg2(Si,Sn) Thermoelectric Materials)

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摘要(中)

科技日新月異，石化能源帶動人類發展從工業革命至今，足以見人類社會進步的足跡，卻也造成全球暖化和能源枯竭等問題，人們迫切尋找替代能源做為新的方案。熱電材料能利用熱能，將閒置或多餘的能量轉換成電能，使得系統使用能量的效率進一步提升，此特質讓它具有成為再生能源的潛力。
本實驗透過Mg2Si和Mg2Sn粉末，經混粉、冷壓成形、退火及不銹鋼球磨，再用不同比例和不同的製程溫度合成Mg2SiSn熱電試片，以求最佳的熱電優值。最後我們製備Mg2SiSn塊材來製作模組，並量測其熱電特性。

摘要(英)

With new technological advances, from the Industrial Revolution to the present, petrochemical energy has been enough to see human social progress, but it has also caused problems such as global warming and energy depletion. People are eager to find new solutions as alternative energy. Thermoelectric materials can use thermal energy to convert idle or excess energy into electrical energy, so that the efficiency of the system′s energy use is further improved. This feature gives it the potential to become a renewable energy.
In this study, Mg2Si and Mg2Sn powders were mixed, cold-pressed, annealed and stainless steel ball milled. Then, Mg2SiSn thermoelectric sample were syn-thesized with different proportions and different process temperatures to find the best thermoelectric figure of merit. Finally, we prepare Mg2SiSn bulk materials to make modules and measure thermoelectric characteristics.

關鍵字(中)

★ 熱電材料
★ 鎂矽錫

關鍵字(英)

★ Thermoelectric Materials
★ Mg2(Si,Sn)

論文目次

致謝 vi
摘要 vii
Abstract viii
目錄 ix
圖目錄 xii
表目錄 xvii
第壹章、導論 1
1-1前言 1
1-2熱電歷史 1
1-3熱電應用與前景 3
第貳章、熱電理論與文獻回顧 4
2-1前言 4
2-2熱電理論 4
2-2-1熱電優值 4
2-2-2席貝克效應 6
2-2-3功率因子 7
2-2-4熱導率 9
2-3文獻回顧 10
2-3-1 研究動機 10
2-3-2 熱電塊材的製備方法 11
2-3-3 熱電結構 13
2-3-4 鎂矽錫熱電材料 16
第參章、製程開發與量測 18
3-1前言 18
3-2矽粉摻雜 19
3-2-1氧化改善 21
3-3二元化合物 22
3-3-1 Mg2Sn材料製程 22
3-3-2 Mg2Si 材料製程 24
3-3-3 Mg2SiSn材料製程 24
3-4模組製程 25
3-5量測儀器 27
3-5-1電導率量測 27
3-5-2 席貝克係數量測 28
3-5-3 密度量測 30
3-5-4 熱擴散係數量測 31
3-5-5 比熱量測 32
3-5-6 熱導率分析 32
3-5-7 結構分析 33
3-5-8 晶體結構分析 35
3-5-9 模組電性分析 37
第肆章、實驗結果與討論 39
4-1前言 39
4-2 Mg2Si分析 39
4-2-1 Mg2Si添加額外Mg 39
4-2-2摻雜矽粉製程變因 41
4-2-3 矽粉氧化分析 42
4-2-4 Mg2Si製程設備變因 44
4-3 Mg2Sn分析 49
4-4球磨分析 52
4-5 Mg2SiSn分析 59
4-5-1 Mg2Si0.4Sn0.6在退火1小時下不同製程溫度的特性 60
4-5-2 Mg2Si0.4Sn0.6在550度縮短時間退火的特性 64
4-5-3 Mg2Si0.4Sn0.6在400度拉長時間退火的特性 67
4-5-4 Mg2Si0.4Sn0.6摻雜Sb特性分析 70
4-5-5 Mg2Si0.4Sn0.6退火48和96小時的熱電優值 73
4-6 單極熱電模組 78
第伍章、結論 81
參考資料 82

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指導教授

辛正倫(Cheng-Lun Hsin)

審核日期

2021-8-9

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