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首页> 外文期刊>RSC Advances >Cost effective synthesis of p-type Zn-doped MgAgSb by planetary ball-milling with enhanced thermoelectric properties
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Cost effective synthesis of p-type Zn-doped MgAgSb by planetary ball-milling with enhanced thermoelectric properties

机译：具有增强的热电性能的行星球磨法经济高效地合成p型掺杂锌的MgAgSb

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摘要

As promising candidates for the progress of low-temperature thermoelectric devices, MgAgSb-based thermoelectric materials have drawn a great deal of attention. However, due to complicated phase changes, high content of impurities and high volatilization of Mg, it is difficult to synthesize pure phase MgAgSb-based thermoelectric materials via conventional methods. Here, MgAgSb alloy was successfully synthesized by a combination of common planetary ball milling and spark plasma sintering. Furthermore, the introduction of Zn improved the purity of alloys, leading to optimization of the electrical transport properties. As a result, the power factor was improved from 1087 μW m ~(?1) K ~(?2) for MgAg _(0.9) Sb _(0.95) to 1394 μW m ~(?1) K ~(?2) for Mg _(0.97) Zn _(0.03) Ag _(0.9) Sb _(0.95) at 473 K, and the ZT reached ～0.7 at 473 K. These results suggest that MgAgSb-based thermoelectric materials have a good thermoelectric application potential and this study can be used as guidance for the synthesis and performance improvement of other thermoelectric materials. Our synthesis route sets forth a new avenue for accelerating commercial applications of MgAgSb-based thermoelectric power generation or refrigeration.
机译：基于MgAgSb的热电材料已成为低温热电设备发展的有希望的候选者。但是，由于相变复杂，杂质含量高，Mg挥发高，因此难以通过常规方法合成纯相的MgAgSb系热电材料。在这里，MgAgSb合金是通过普通行星球磨和火花等离子烧结相结合成功合成的。此外，锌的引入提高了合金的纯度，从而优化了电传输性能。结果，功率因数从MgAg _（0.9）Sb _（0.95）的1087μWm〜（？1）K〜（？2）提高到1394μWm〜（？1）K〜（？2）。 Mg_（0.97）Zn_（0.03）Ag _（0.9）Sb _（0.95）在473 K时的ZT值达到〜0.7。这些结果表明，MgAgSb基热电材料具有良好的热电应用潜力本研究可作为其他热电材料的合成和性能改进的指导。我们的合成路线为加速基于MgAgSb的热电发电或制冷的商业应用开辟了一条新途径。

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