N型鎂矽錫合金及其熱電模組研究

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姓名

徐昱璿(Yu-Hsuan Hsu) 查詢紙本館藏

畢業系所

電機工程學系

論文名稱

N型鎂矽錫合金及其熱電模組研究
(Thermoelectric Module Properties of N-type Mg2(Si,Sn)Alloy)

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摘要(中)

近年來全球暖化嚴重性急遽上升，地球環境及生態也因此不斷地改變，因此開發綠色能源逐漸被世人所重視，並積極地開發相關研究議題。我們知道綠能發電能減緩甚至改善地球生態劣化的程度，而其中熱電效應之應用為一種優秀的方式。熱電效應，一種熱能和電能能夠相互轉換的效應，其在環保上的價值非常高，可應用於廢熱回收、溫差發電、熱電致冷等。當中影響熱電效應的好壞主要取決於熱電材料本身具有的熱電優值(ZT)，因此，致力提升ZT優值在熱電材料研究中最為重要。
本研究透過矽摻雜反應，製作出N/P type之奈米粉末，與鎂錫粉末加以混合後冷壓成塊材，再用不同溫度的環境做退火反應，評估出熱電特性最好的製程，最後使用其製程製備塊材來製作模組，並量測其熱電上之特性。

摘要(英)

In these years, the power consumption has been reaching new records, consuming lots of energy from coal, gasoline, fuel, and nuclear. These energy resource has their own drawbacks, resulting in pollutions and hazardous substance. Due to the concern of environmental sustainability, clean energy is in demand and in dire need.
In this study, P and N-type nanopowders were prepared by mechanical grinding, followed by doping and mixing to obtain the designed composition. Then it was cold-pressed into ingots and annealed at different temperatures to study the thermoelectric properties. The thermoelectric module was made and measured to test its conversion efficiency.

關鍵字(中)

★ 鎂矽錫合金
★ 熱電材料
★ 熱電模組
★ ZT優值

關鍵字(英)

論文目次

摘要 i
Abstract ii
致謝 iii
目錄 iv
圖目錄 vi
表目錄 ix
第一章、導論 - 1 -
1-1前言 - 1 -
1-2 熱電效應 - 2 -
1-3研究動機 - 3 -
第二章、實驗方法與儀器 - 4 -
2-1 球磨矽粉末 - 4 -
2-2 混合粉末與摻雜 - 4 -
2-3 冷壓成塊材 - 4 -
2-4 加壓Cr、封管與退火 - 4 -
2-5組裝模組 - 4 -
2-6 量測儀器 - 5 -
2-6-1 Seebeck Coefficient量測 - 5 -
2-6-2 電導率量測 - 6 -
2-6-3 密度量測 - 7 -
2-6-4 熱擴散量測 - 8 -
2-6-5 比熱量測 - 9 -
2-6-6 熱導率量測 - 10 -
2-6-7 熱電優值(ZT figure of merit) - 10 -
2-6-8 粉末粒徑觀測 - 11 -
2-6-9 X光繞射分析(X-ray diffraction XRD) - 11 -
2-6-10 模組電性分析 - 12 -
第三章、實驗流程與步驟 - 15 -
3-1 前言 - 15 -
3-2 實驗流程設計 - 16 -
3-3 實驗步驟 - 17 -
3-3-1 矽粉末球磨 - 17 -
3-3-2 N-type摻雜 - 20 -
3-3-3 混和Mg、Si、Sn粉末 - 23 -
3-3-4 冷壓成塊材 - 23 -
3-3-5 加壓Cr、封管與退火 - 25 -
3-3-6 組裝模組 - 26 -
第四章、實驗結果與討論 - 28 -
4-1 前言 - 28 -
4-2 觀察與分析 - 29 -
4-2-1 SEM - 29 -
4-2-2 退火後塊材外觀 - 30 -
4-3 塊材之電導率與席貝克係數 - 36 -
4-3-1 150℃製程之塊材 - 37 -
4-3-2 200℃製程之塊材 - 40 -
4-3-3 250℃製程之塊材 - 44 -
4-3-4 300℃製程之塊材 - 48 -
4-4 加壓Cr粉末之塊材退火量測 - 52 -
4-4-1 Cr加壓厚度測試與量測 - 52 -
4-4-2 塊材加壓300 μm Cr、加額外錫之退火與量測 - 53 -
4-5 模組特性 - 61 -
第五章、結論 - 63 -
參考文獻 - 65 -

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指導教授

辛正倫(Cheng-Lun Hsin)

審核日期

2018-7-25

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