Enhanced Seebeck coefficient by energy filtering in Bi-Sb-Te based composites with dispersed Y₂O₃ nanoparticles

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• 作者：Babu Madavali^a ; Hyo-Seob Kim^a ; ^b ; Kap-Ho Lee^c ; Soon-Jik Hong^a ; ^{hongsj@kongju.ac.kr}
• 关键词：Thermoelectric materials ; p-type Bi-Sb-Te nanocomposites ; Energy filtering ; Seebeck coefficient
• 刊名：Intermetallics
• 出版年：2017
• 出版时间：March 2017
• 年：2017
• 卷：82
• 期：Complete
• 页码：68-75
• 全文大小：1886 K
• 卷排序：82

文摘

P-type BiSbTe/Y2O3 nanocomposites have been fabricated by ball milling and Spark plasma sintering. Seebeck coefficient is eminently improved (45%) due to scattering of carriers through the energy filtering effect. Thermal conductivity is reduced by 22% in nanocomposites due to carrier/phonon scattering. Hardness of nanocomposites was significantly improved (>49%) compared to pure BiSbTe.