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管式反應(yīng)法制備Mg2Sn基熱電材料及其性能研究
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國家自然科學(xué)基金 (50975190，51101111)，山西省青年科學(xué)基金 (2011021022-3)


Preparation of Mg2Sn Based Thermoelectric Materials by a Tube Solid Reaction Method and Their Performance
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    摘要:

    采用MgH2代替單質(zhì)Mg粉與Sn粉進(jìn)行固相反應(yīng)制備Mg2Sn基熱電材料，有效地避免了Mg單質(zhì)的揮發(fā)和氧化。在300~750 K的溫度區(qū)間內(nèi)對其熱電性能進(jìn)行了測試、分析，并與文獻(xiàn)中報道的Mg2Sn熱電性能進(jìn)行了對比。結(jié)果表明，所有試樣在整個測溫區(qū)間均顯示出n型摻雜，并且隨著溫度的升高，呈現(xiàn)逐漸向p型轉(zhuǎn)變的變化趨勢。摻雜Y后Mg2Sn試樣的Seebeck系數(shù)有所提高，綜合電性能比文獻(xiàn)報道提高了40%，并且在350 K時獲得最大的ZT值(0.033)，是文獻(xiàn)報道的Mg2Sn的ZT值(0.013)的近3倍

    Abstract:

    Mg2Sn based thermoelectric (TE) materials were prepared by a low-temperature solid-state reaction between MgH2 and Sn. Reaction between tin and magnesium hydride instead of pure magnesium minimizes the oxidation and volatilization of magnesium. The thermoelectric performance was measured over the temperature range 300~750 K. All samples indicate n-type conduction within the whole temperature region, while they show a tendency to be nearly p-type with the temperature increasing. The Seebeck coefficient of Y-doped Mg2Sn has been enhanced, and the power factor has been 40% higher than the value of reference. The 0.2% Y-doped Mg2Sn exhibits a maximum figure of merit ZT of 0.033 at 350 K, which is nearly 3 times of the value of reference.

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焦媛媛,樊文浩,陳少平,鮑亮亮,孟慶森.管式反應(yīng)法制備Mg2Sn基熱電材料及其性能研究[J].稀有金屬材料與工程,2015,44(2):438~442.[Jiao Yuanyuan, Fan Wenhao, Chen Shaoping, Bao Liangliang, Meng Qingsen. Preparation of Mg2Sn Based Thermoelectric Materials by a Tube Solid Reaction Method and Their Performance[J]. Rare Metal Materials and Engineering,2015,44(2):438~442.]
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  • 收稿日期:2014-03-05
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  • 在線發(fā)布日期: 2015-05-29
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