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摻雜Al的(In2Te3)0.09(SnTe)0.91化合物熱電性能
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Thermolelectric Properties of Al-Doped (In2Te3)0.09(SnTe)0.91 Compound
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    摘要:

    以等摩爾分?jǐn)?shù)的Al元素替代(In2Te3)0.09 (SnTe)0.91中的In元素，利用放電等離子燒結(jié)技術(shù)、采用相同的工藝制備了(In2Te3)0.09(SnTe)0.91和(In1.9Al0.1Te3)0.09 (SnTe)0.91 2種化合物，并對(duì)兩者的微觀結(jié)構(gòu)和熱電性能進(jìn)行對(duì)比。結(jié)果表明，摻雜Al元素后，材料的Seebeck系數(shù)降低很小，電導(dǎo)率為1×105~2.3×105 W-1?m-1，是摻雜前的2.4~3倍，晶格熱導(dǎo)率kL值大幅度降低。在693 K時(shí)，摻雜Al后的化合物ZT 值達(dá)到最大值0.4，是同溫度下?lián)诫s前ZT 值的2倍。

    Abstract:

    Al element was substituted for In in the (In2Te3)0.09 (SnTe)0.91 compound with the same molar fraction and (In2Te3)0.09 (SnTe)0.91 and (In1.9Al0.1Te3)0.09(SnTe)0.91 compounds were prepared by spark plasma sintering. The microstructure and the thermoelectric property of the compounds were investigated. Results show that although the Seebeck coefficient of the sample is almost unchanged after Al doping, the electrical conductivity increases to 1×105 W-1·m-1 at 321 K and to 2.3×105 W-1·m-1 at 705 K, being at least 2.4~3 times that of Al free (In2Te3)0.09(SnTe)0.91 compound, and the lattice thermal conductivity is significantly decreased. The highest ZT value of 0.4 is obtained at 693 K, which is approximately 2 times as large as that of the Al-free (In2Te3)0.09(SnTe)0.91 compound at the same temperature.

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付 紅,張伯權(quán),崔教林.摻雜Al的(In2Te3)0.09(SnTe)0.91化合物熱電性能[J].稀有金屬材料與工程,2013,42(6):1231~1235.[Fu Hong, Zhang Boquan, Cui Jiaolin. Thermolelectric Properties of Al-Doped (In2Te3)0.09(SnTe)0.91 Compound[J]. Rare Metal Materials and Engineering,2013,42(6):1231~1235.]
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  • 收稿日期:2012-06-20
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