Achieving high power factor of p-type BiSbTe thermoelectric materials via adjusting hot-pressing temperature. (February 2018)

• Record Type: Journal Article
• Authors: Wang, Xiaocui; Li, Yuanyue; Liu, Guoxia; Shan, Fukai
• Is Part Of: Intermetallics. Volume 93(2018:Feb.)
• Page Start: 338
• Page End: 342
• Publication Date: 2018-02
• Subjects: BiSbTe -- Thermoelectric -- Hot pressing -- Power factor -- ZT value; Intermetallic compounds -- Metallography -- Periodicals; Metallic glasses -- Periodicals; Composés intermétalliques -- Métallographie -- Périodiques; 669.94
• DOI: 10.1016/j.intermet.2017.10.015
• Languages: English
• ISSNs: 0966-9795

Abstract

Abstract: Achieving high power factor values for BiSbTe alloys is important for further elevation of their thermoelectric performance. In this report, Bi0.4 Sb1.6 Te3 bulk samples were prepared by a fusion method followed by hot pressing at different temperatures (523 K, 573 K, 623 K and 663 K), and their thermoelectric properties were investigated from 300 K to 500 K. It was found that the power factor and thermal conductivity increased significantly with increasing hot-pressing temperature. A record power factor of 53.8 μW/(cm K 2 ) at 300 K was achieved for the sample hot pressed at 663 K. In addition, a maximum ZT of 1.3 at 413 K and average ZT ave of 1.2 at 300–500 K were achieved for the sample hot pressed at 623 K. Highlights: Bi0.4 Sb1.6 Te3 samples were prepared by a fusion method followed by hot pressing. A record PF = 53.8 μW/(cm K 2 ) was achieved at 300 K for sample hot pressed at 663 K. ZT = 1.3(413 K) and ZT ave = 1.2 (300–500 K) were achieved for sample hot pressed at 623 K.