Solid-state syntheses and properties of Zn4Sb3 thermoelectric materials
Solid-state syntheses and properties of Zn4Sb3 thermoelectric materials
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DOI：
10.1016/s0925-8388(03)00418-3
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发表时间：
2003-10
影响因子：
6.2
通讯作者：
S. Ur;P. Nash;Il-Ho Kim
中科院分区：
文献类型：
--
作者：
S. Ur;P. Nash;Il-Ho Kim
为了生产高效的 ε-Zn4Sb3 块状样品，人们使用了各种固态合成技术。使用的技术是：冷压坯烧结，然后热压；热压直接合成；和烧结锻造。使用 DSC、XRD 和 SEM 系统地研究了固态合成过程中该合金体系的相变。成功合成了单相 Zn4Sb3 粉末和高密度的无裂纹块状样品，但发现需要过量的 Zn 来补偿加工过程中的 Zn 损失。评估了热固结压块在室温下的热电性能，并与其他研究已发表的结果进行了比较。单相Zn4Sb3材料的热电性能表现出合理的值。利用热固结工艺的固态合成提供了生产块状 Zn4Sb3 的潜在加工路线。
Various solid-state synthesis techniques have been used in order to produce high-efficiency ε-Zn4Sb3bulk specimens. The techniques used were: sintering of cold compacts followed by hot pressing; direct synthesis by hot pressing; and sinter-forging. The phase transformations in this alloy system during solid-state syntheses were systematically investigated using DSC, XRD and SEM. Single-phase Zn4Sb3powders and crack-free bulk specimens having high density were successfully synthesized, but excess Zn was found to be necessary to compensate for Zn loss during processing. The thermoelectric properties at room temperature were evaluated for the hot consolidated compacts and compared with the published results of other studies. The thermoelectric properties of single-phase Zn4Sb3materials showed reasonable values. Solid-state synthesis utilizing the hot consolidation process offers potential processing routes to produce bulk Zn4Sb3.