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SPS法制備的三元合金Ag0.405Sb0.532Te的熱電性能
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Thermoelectric Properties of Ternary Alloy Ag0.405Sb 0.532Te Prepared by Spark Plasma Sintering
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National Natural Science Foundation of China (60674110)

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    摘要:

    采用放電等離子燒結(jié)法(SPS)制備了三元合金Ag0.405Sb0.532Te，并研究了它的輸運(yùn)性能，即Seebeck系數(shù)、電導(dǎo)率和熱導(dǎo)率。結(jié)果表明，當(dāng)溫度從316 K上升到548 K時(shí)，電導(dǎo)率從7.6′104 S·m-1下降到6.6′104 S·m-1。在438 K以上，熱導(dǎo)率隨溫度上升逐漸增加，低于438 K時(shí)，熱導(dǎo)率趨于穩(wěn)定，約為0.86 W·(K·m)-1。無量綱熱電優(yōu)值ZT在548 K時(shí)取得最大值0.65，稍高于Ag0.365Sb0.558Te三元合金的0.61。與摻Ag的AgxBi0.5Sb1.5-xTe3(x=0~0.4)合金相比，熱電性能得到了改善。并再次討論了AgxBi0.5Sb1.5-xTe3合金中析出的第二相Ag-Sb-Te三元合金的作用機(jī)制

    Abstract:

    The ternary Ag0.405Sb0.532Te alloy was prepared by spark plasma sintering, and its transport properties involving Seebeck coefficients, electrical and thermal conductivities were evaluated. The results reveal that the electrical conductivity mildly decreases from 7.6′104 S·m-1 to 6.6′104 S·m-1 when the temperature increases from 316 K, to 548 K. Above 438 K, the thermal conductivity gradually increases with the increase of the temperature, and below 438 K, a relative stable value of about 0.86 W·K-1·m-1 is obtained. The maximum thermoelectric figure of merit ZT is up to 0.65 at 548 K, a little higher than 0.61 of the ternary alloy Ag0.365Sb0.558Te. The thermoelectric properties have been improvement compared with the Ag-doped AgxBi0.5Sb1.5-xTe3 alloys (x=0-0.4). The action mechanism of the second phase Ag-Sb-Te ternary alloy precipitated in the AgxBi0.5Sb1.5-xTe3 alloys has been re-discussed

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應(yīng)鵬展,付 紅,陳東勇. SPS法制備的三元合金Ag0.405Sb0.532Te的熱電性能[J].稀有金屬材料與工程,2010,39(4):570~573.[Ying Pengzhan, Fu Hong, Chen Dongyong. Thermoelectric Properties of Ternary Alloy Ag0.405Sb 0.532Te Prepared by Spark Plasma Sintering[J]. Rare Metal Materials and Engineering,2010,39(4):570~573.]
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  • 收稿日期:2009-04-13
  • 最后修改日期:2009-07-24
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