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懸浮熔煉制備Half-Heusler合金Zr1-xTixNiSn0.975Sb0.025及其熱電性能
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國家“863”計劃（2007AA03Z234）；“973”計劃（2007CB607502）；國家自然科學基金（50601022和50731006）


Suspension Melting Preparation of Zr1-xTixNiSn0.975Sb0.025 Half-Heusler Alloy and Its Thermoelectric Properties
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    摘要:

    采用懸浮熔煉法合成了Zr1-xTixNiSn0.975Sb0.025（x = 0, 0.15, 0.25, 0.5）基Half-Heusler熱電材料，X射線衍射結(jié)果表明所制備合金為單相。相對于常規(guī)方法，懸浮熔煉顯著縮短了制備Half-Heusler合金的時間。同時研究了Ti取代及不同熱壓條件對材料熱電性能的影響。結(jié)果表明：ZrNiSn0.975Sb0.025合金進行A位取代可降低材料的熱導率，而不會明顯影響其熱電性能。致密度可以影響材料的熱電性能，適當?shù)臒釅簵l件可以使合金的ZT值達到最大，約為0.45。

    Abstract:

    Zr1-xTixNiSn0.975Sb0.025 (x=0, 0.15, 0.25, 0.5) based Half-Heusler thermoelectric materials were synthesized by suspension melting. X-ray diffraction results show that the obtained alloy was single phase compound. Compared with conventional melting methods, the suspension melting markedly reduced the preparation duration. Meanwhile the effects of Ti substitution and different hot-pressing conditions on thermoelectric properties of the materials were also studied. Results show that the Ti substitution for the A site of ZrNiSn0.975Sb0.025 can reduce the thermal conductivity but does not affect its thermoelectric properties obviously. The density can affect the thermoelectric properties. Proper hot-pressing condition can make ZT values reach the maximum of about 0.45.

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姜廣宇,徐 績,趙 波,蔚 翠,朱鐵軍,趙新兵.懸浮熔煉制備Half-Heusler合金Zr1-xTixNiSn0.975Sb0.025及其熱電性能[J].稀有金屬材料與工程,2009,38(10):1831~1834.[Jiang Guangyu, Xu Ji, Zhao Bo, Yu Cui, Zhu Tiejun, Zhao Xinbing. Suspension Melting Preparation of Zr1-xTixNiSn0.975Sb0.025 Half-Heusler Alloy and Its Thermoelectric Properties[J]. Rare Metal Materials and Engineering,2009,38(10):1831~1834.]
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  • 收稿日期:2008-09-18
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