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添加Sb的Ga2Te3合金熱電性能
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國家自然科學(xué)基金(50871056)


Thermoelectric Properties of Sb-Doped Ga2Te3 Alloy
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    摘要:

    本研究采用等摩爾分數(shù)的Sb元素替換Ga2Te3中的Ga元素，并利用放電等離子燒結(jié)技術(shù)制備Ga1.9Sb 0.1Te3合金，研究其微觀結(jié)構(gòu)和熱電性能。結(jié)果表明，添加Sb元素后，材料的Seebeck系數(shù)為130~240 mV/K，明顯低于單晶Ga2Te3，電導(dǎo)率為3600~1740 W-1·m-1，至少是單晶Ga2Te3的17倍，熱導(dǎo)率提高近25%。在649 K時Ga1.9Sb 0.1Te3合金的熱電優(yōu)值(ZT)達到最大值0.1，是同溫度下單晶Ga2Te3 ZT值的3倍

    Abstract:

    Sb element was substituted for Ga in the Ga2Te3 alloy with the same molar fraction and Ga1.9Sb 0.1Te3 alloy was prepared by spark plasma sintering. The microstructure and the thermoelectric (TE) property of the alloy were investigated. Results show that after Se doping the Seebeck coefficient of the sample is about 130-240 mV/K, much lower than that of single crystal Ga2Te3, and the electrical conductivity decreases from 3600 to 1740 W-1·m-1 with temperature elevation to 649 K, being at least 16 times higher than that of single crystal Ga2Te3 at the corresponding temperature. The thermal conductivity increases by about 25% after Sb doping. The maximum TE figure of merit (ZT) value of 0.1 is obtained at 649 K, which is approximately 3 times as large as that of single crystal Ga2Te3 at the corresponding temperature

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付 紅,應(yīng)鵬展,崔教林,顏艷明,張曉軍.添加Sb的Ga2Te3合金熱電性能[J].稀有金屬材料與工程,2011,40(5):849~852.[Fu Hong, Ying Pengzhan, Cui Jiaolin, Yan Yanming, Zhang Xiaojun. Thermoelectric Properties of Sb-Doped Ga2Te3 Alloy[J]. Rare Metal Materials and Engineering,2011,40(5):849~852.]
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  • 收稿日期:2010-05-21
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