研究生: |
劉志浩 |
---|---|
論文名稱: |
生醫應用熱電Bi-Sb-Te材料之相平衡與液相線投影圖 Phase equilibria and liquidus projection of Bi-Sb-Te thermoelectric biomedical materials |
指導教授: | 陳信文 |
口試委員: |
張志溥
黃振東 張立信 |
學位類別: |
碩士 Master |
系所名稱: |
工學院 - 化學工程學系 Department of Chemical Engineering |
論文出版年: | 2012 |
畢業學年度: | 100 |
語文別: | 中文 |
論文頁數: | 154 |
中文關鍵詞: | 熱電材料 、鉍-銻-碲 液相線投影圖 、鉍-銻-碲 相平衡 |
相關次數: | 點閱:2 下載:0 |
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Bi2Te3摻雜Sb在室溫下具有非常好的熱電性質,而液相線投影圖與等溫截面相圖的建立對材料的選擇與開發有非常重要的幫助,本研究以實驗方法探討建構Bi-Sb-Te三元系統的液相線投影圖與250℃及500℃之等溫截面相圖。在液相線投影圖的研究中,其組成之二元Bi-Sb系統為完全互溶,並沒有二元介金屬相,其組成之Sb-Te二元系統則有δ、γ與Sb2Te3等三個介金屬,在Bi-Te二元系統中,除了Bi2Te3之外,其它二元相尚未經確認。在Bi2Te3-Sb-Te這個範圍內,除了上述之δ、γ、Sb2Te3與Bi2Te3等二元介金屬相、以及三個組成元素之固溶體(solid solution)為首要析出相之外,並未觀察到三元固化相的存在。在250℃等溫截面相圖方面,經過7個月熱處理後還是無法使合金達相平衡,因此本研究未能建構出Bi-Sb-Te三元系統250℃等溫截面相圖。而500℃等溫截面相圖方面,除了Bi-Te二元系統中未經確認之區域外,本研究完成了大部分相區之建構與探討,另外,並未發現任何三元相的存在。
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