Porous bismuth antimony telluride alloys with excellent thermoelectric and mechanical properties
Porous bismuth antimony telluride alloys with excellent thermoelectric and mechanical properties
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具有优异热电和机械性能的多孔碲化铋锑合金
DOI：
10.1039/d0ta09795k
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发表时间：
2021-03
影响因子：
11.9
通讯作者：
Tian Yongjun
中科院分区：
文献类型：
--
作者：
Zhao Peng;Yu Fengrong;Wang Binhao;Zhao Haidong;Chen Chen;Wang Dan;Ying Pan;Wu Yingju;Li Penghui;Zhang Bin;Liu Bing;Zhao Zhisheng;Hu Wentao;Yu Dongli;He Julong;Liu Zhongyuan;Xu Bo;Tian Yongjun
p型BiSbTe合金在室温附近具有最高的ZT，但由于具有弱货车德瓦耳斯相互作用的原子层状结构，机械性能较差。在这里，我们报告成功地制备多孔BiSbTe合金的顺序高压合成，球磨，放电等离子烧结。孔隙率通常对材料的机械性能有负面影响。然而，我们的多孔块体的热电和机械性能都大大增强，这得益于具有紧密结合的等轴晶粒和均匀分布的孔隙（孔隙率约为100%）的独特微观结构。0.15）。Bi_（0.42）Sb_（1.58）Te_3在350 K附近的最大ZT值为1.27，在298-463 K的测量温度范围内的平均ZT值为1.15。此外，在这些多孔样品中实现了优异的机械性能，包括硬度、弯曲和压缩强度，其与致密样品的机械性能具有竞争力（甚至更好）。目前的结构构筑策略可以促进多孔热电材料的发展，特别是具有类似各向异性晶体结构的材料。
p-Type BiSbTe alloys possess the highest ZT near room temperature, but inferior mechanical properties due to the atomically layered structure with weak van der Waals interactions. Here we report the successful preparation of porous BiSbTe alloys by sequential high-pressure synthesis, ball milling, and spark plasma sintering. Porosity usually has a negative effect on the material's mechanical properties. However, both thermoelectric and mechanical properties of our porous bulks are greatly enhanced, which benefit from the unique microstructure featuring closely bonded equiaxed grains and uniformly distributed pores (with a porosity of ca. 0.15). The optimal Bi0.42Sb1.58Te3 shows a maximum ZT of 1.27 around 350 K and an average ZT of 1.15 in the measured temperature range of 298–463 K. Furthermore, excellent mechanical properties including hardness, bending and compressive strengths are achieved in these porous samples, which are competitive with (or even better than) those of dense samples. The current structural architecture strategy can promote the development of porous thermoelectric materials, especially materials with similar anisotropic crystal structures.
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影响因子：
10.9
作者：
Jie Hu;Xi’an Fan;Chengpeng Jiang;Bo Feng;Qiusheng Xiang;Guangqiang Li;Zhu He;Yawei Li
通讯作者：
Jie Hu;Xi’an Fan;Chengpeng Jiang;Bo Feng;Qiusheng Xiang;Guangqiang Li;Zhu He;Yawei Li
影响因子：
6.2
作者：
Meng-Pei Lu;C. Liao
通讯作者：
Meng-Pei Lu;C. Liao
影响因子：
29.4
作者：
Snyder, G. Jeffrey;Snyder, Alemayouh H.;Niu, Changning
通讯作者：
Niu, Changning
影响因子：
64.8
作者：
Biswas, Kanishka;He, Jiaqing;Kanatzidis, Mercouri G.
通讯作者：
Kanatzidis, Mercouri G.
影响因子：
3.2
作者：
H. Juretschke;R. Landauer;J. Swanson
通讯作者：
H. Juretschke;R. Landauer;J. Swanson