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FeTe<sub>2</sub>化合物快速制備及電學(xué)輸運性能研究
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1.貴州大學(xué)材料與冶金學(xué)院;2.六盤水師范學(xué)院;3.河南理工大學(xué)材料科學(xué)與工程學(xué)院

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貴州省教育廳(黔教合KY字[2016]102號);國家自然基金(51764005)。


Rapid preparation and electrical transport properties of compound FeTe<sub>2</sub>
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1.college of Materials and Metallurgy,Guizhou University,Guiyang;2.School of Materials Science and Engineering,Henan Polytechnic University,Jiaozuo

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    摘要:

    利用真空高溫?zé)Y(jié)的方法,在803K~923K的溫度范圍內(nèi)快速合成了單相的合金化合物FeTe<sub>2</sub>。在制備溫度為863.15K時,考查了不同保溫時間對制備單相樣品FeTe<sub>2</sub>的影響規(guī)律。制備出的樣品進行了XRD和SEM分析,并在室溫下對樣品進行了電阻率和Seebeck系數(shù)的測試分析。研究結(jié)果表明:在溫度803K~923K的溫度范圍內(nèi),采用高溫?zé)Y(jié)反應(yīng)能夠快速制備出單相的多晶體化合物FeTe<sub>2</sub>;制備出的樣品內(nèi)部均勻存在許多微米級孔洞。經(jīng)室溫電學(xué)性質(zhì)測試,樣品在制備溫度為863.15K保溫時間60min時獲得最大Seebeck系數(shù)88.21μV/k。當(dāng)制備溫度為803.15K保溫時間30min時,獲得最小電阻率為7.86 mΩ.cm。樣品在制備溫度923.15K保溫30min時,獲得最大功率因子53.82 μW/(m.k<sub>2</sub>)。

    Abstract:

    Single-phase alloy compound FeTe<sub>2</sub> was rapidly synthesized by vacuum high temperature sintering in the temperature range of 803K~923K. At the preparation temperature of 863.15K, the effect of different holding time on the preparation of single phase FeTe<sub>2</sub> was examined. The crystallographic properties and microstructure were characterized by X-ray diffraction and electron probe microanalysis separately. Seebeck coefficient and electrical resistivity were measured at room temperature. The results show that the single-phase polycrystalline compound FeTe<sub>2</sub> can be rapidly prepared by high-temperature sintering reaction. There are many micron-sized pores evenly inside the sample. The transport properties were measured at room temperature. The maximum Seebeck coefficient was 88.21 88.21μV/k at preparation temperature of 863.15K and holding time of 60 min. When the preparation temperature was 803.15K and the holding time was 30min, the minimum resistivity was 7.86 mΩ.cm. The maximum power factor 53.82 μW/(m.k<sub>2</sub>) was obtained when the sample was prepared at 923.15K temperature for 30min.

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秦丙克,籍永華,宿太超,白志玲,黃潤,張金柱. FeTe<sub>2</sub>化合物快速制備及電學(xué)輸運性能研究[J].稀有金屬材料與工程,2019,47(3):931~935.[Qin Bingke, Ji Yonghua, Su Taichao, Bai Zhiling, Huang Run, Zhang Jinzhu. Rapid preparation and electrical transport properties of compound FeTe<sub>2</sub>[J]. Rare Metal Materials and Engineering,2019,47(3):931~935.]
DOI:10.12442/j. issn.1002-185X.20180542

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  • 收稿日期:2018-05-25
  • 最后修改日期:2018-09-06
  • 錄用日期:2018-09-27
  • 在線發(fā)布日期: 2019-04-10
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