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    Title: 熱電材料Ag(Sb1-xGex)Te2及AgSb(Te2-xSex)的物性研究
    Physical Properties of the Thermoelectric Material of Ag(Sb1-xGex)Te2 and AgSb(Te2-xSex)
    Authors: 林垣豪
    Lin, Yuan Hao
    Contributors: 陳洋元
    Chen, Yang Yuan
    林垣豪
    Lin, Yuan Hao
    Keywords: 熱電材料
    高熱電優值
    低熱傳導系數
    Thermoelectric materials
    High ZT value
    Low thermal conductivity
    Date: 2016
    Issue Date: 2016-09-02 00:15:03 (UTC+8)
    Abstract: AgSbTe2是一種相當好的熱電材料,具有相當低的熱傳導係數以及接近於1的熱電優值(ZT值)。一些文獻中有提到此材料在約600 K左右會產生第二相。因此,在這篇論文中,我們希望能夠研究在不一樣比例摻雜的Ge、Se,使材料的熱電性質上的改變;爾後我們也希望藉由熱示差掃瞄卡量計(DSC(Differential Scanning Calorimeter))來驗證其他文獻中的結果:約600 K左右可以得到第二相。為了使樣品混和均勻,在製備樣品時,利用熔融及搖勻(Melting and Shaking)的方法,也就是將樣品熔融之後進行搖勻的動作,在樣品燒結成塊材之前,得到相對較均勻的樣品。我們一共使用了5種的比例合成Ag(Sb1-xGex)Te2、AgSb(Te2-xSex),分別為:x = 0.01~0.05。在樣品燒結完成以後,將樣品進行破管,磨成細粉,為了在之後利用電漿火花燒結(SPS (Spark Plasma Sintering))壓製出我們所需要的樣品。進行量測時,我們利用了雷射熱擴散量測系統(LFA(Laser Flash Apparatus))以及賽貝克係數與電阻率量測系統ZEM-3得到我們所需要的熱傳導係數、電傳導係數、賽貝克係數(Seebeck係數)、以及功率因子(Power factor),利用這幾個得到的參數計算,得到我們所需要的熱電優值(ZT值)。其後我們也為了知道是否在600 K左右得到相變,利用了熱示差掃瞄卡量計(DSC(Differential Scanning Calorimeter))來做量測,在600-630 K左右我們兩種摻雜的樣品得到了第二相的變化,使熱傳導係數大幅下降。最後我們得到最高的熱電優值為摻雜Ge比例0.03的樣品,在680 K左右可以得到熱電優值為2.5;Se摻雜比例0.05的樣品,在660 K可以達到2.02左右。
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    Description: 碩士
    國立政治大學
    應用物理研究所
    103755009
    Source URI: http://thesis.lib.nccu.edu.tw/record/#G0103755009
    Data Type: thesis
    Appears in Collections:[應用物理研究所 ] 學位論文

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