Chemical Synthesis of Iron Antimonide (FeSb2) and Its Thermoelectric Properties.
作者： Mohsin Saleemi , Mohsen Yakhshi Tafti , Alexandre Jacquot , Martin Jägle , Mats Johnsson
DOI: 10.1021/ACS.INORGCHEM.5B02658
关键词:
摘要: Low temperature thermoelectric (TE) materials are in demand for more efficient cooling and power generation applications. Iron antimonide (FeSb2) draws great attention over the past few years because of its enhanced factor values. Polycrystalline bulk FeSb2 nanopowder was prepared via a low-temperature molten salts approach followed by subsequent thermal treatment synthetic air hydrogen gas calcination reduction reactions, respectively. Structural analysis confirms desired final phase with submicrometer grain size high compaction density after consolidation using spark plasma sintering (SPS). TE transport properties revealed that material is n-type below 150 K p-type above this temperature; suggests antimony vacancies FeSb2. The electrical conductivity increased significantly, highest achieved 6000 S/cm at 100 K. maximum figure-of-merit, ZT, 0.04 500 K, which about 6 times higher than earlier reported state-of-the art ZT value same material.
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