Fabrication of High Performance Densified Nanocrystalline Bulk Thermoelectric Materials Using High Pressure Sintering Technique
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    发明申请
    Fabrication of High Performance Densified Nanocrystalline Bulk Thermoelectric Materials Using High Pressure Sintering Technique 审中-公开
    使用高压烧结技术制造高性能致密纳米晶体热电材料

    公开(公告)号:US20100295202A1

    公开(公告)日:2010-11-25

    申请号:US12541798

    申请日:2009-08-14

    IPC分类号: H01L35/34

    摘要: The present invention provides a method for the fabrication of high performance densified nanocrystalline bulk thermoelectric material, comprising: (1) preparing a thermoelectric alloy nanopowders by a ball milling process to achieve an average crystal size of 5-30 nm, and (2) preparing the nanocrystalline bulk thermoelectric material by high pressure sintering at a temperature of 0.25-0.8 Tm under a pressure of 0.8-6.0 GPa for 10-120 minutes, to achieve a relative density of 90-100% and an average grain size of 10-50 nm. The method is easy to operate and allows the production of a thermoelectric material with a ZT value higher than 2. In addition, the method can ensure both good thermoelectric properties and high density, and therefore have important applications for energy industry.

    摘要翻译: 本发明提供一种制造高性能致密纳米晶体热电材料的方法,包括:(1)通过球磨法制备热电合金纳米粉末,以获得5-30nm的平均晶体尺寸,和(2)制备 通过在0.8-6.0GPa的压力下在0.25-0.8Tm的温度下高压烧结10-120分钟的纳米晶体热电材料,达到90-100%的相对密度和10-50的平均晶粒尺寸 nm。 该方法易于操作,并且允许制造ZT值高于2的热电材料。此外,该方法可以确保良好的热电性能和高密度,因此在能源工业中具有重要的应用。