Hostname: page-component-77f85d65b8-hzqq2 Total loading time: 0 Render date: 2026-04-17T15:27:39.075Z Has data issue: false hasContentIssue false

Laser additive manufacturing of powdered bismuth telluride

Published online by Cambridge University Press:  06 November 2018

Haidong Zhang*
Affiliation:
Department of Mechanical & Aerospace Engineering, The George Washington University, Washington, District of Columbia 20052, USA
Dean Hobbis
Affiliation:
Department of Physics, University of South Florida, Tampa, Florida 33620, USA
George S. Nolas
Affiliation:
Department of Physics, University of South Florida, Tampa, Florida 33620, USA
Saniya LeBlanc*
Affiliation:
Department of Mechanical & Aerospace Engineering, The George Washington University, Washington, District of Columbia 20052, USA
*
a)Address all correspondence to these authors. e-mail: haidongzhang@gmail.com
Get access

Abstract

Traditional manufacturing methods restrict the expansion of thermoelectric technology. Here, we demonstrate a new manufacturing approach for thermoelectric materials. Selective laser melting, an additive manufacturing technique, is performed on loose thermoelectric powders for the first time. Layer-by-layer construction is realized with bismuth telluride, Bi2Te3, and an 88% relative density was achieved. Scanning electron microscopy results suggest good fusion between each layer although multiple pores exist within the melted region. X-ray diffraction results confirm that the Bi2Te3 crystal structure is preserved after laser melting. Temperature-dependent absolute Seebeck coefficient, electrical conductivity, specific heat, thermal diffusivity, thermal conductivity, and dimensionless thermoelectric figure of merit ZT are characterized up to 500 °C, and the bulk thermoelectric material produced by this technique has comparable thermoelectric and electrical properties to those fabricated from traditional methods. The method shown here may be applicable to other thermoelectric materials and offers a novel manufacturing approach for thermoelectric devices.

Information

Type
Invited Paper
Copyright
Copyright © Materials Research Society 2018 

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

Article purchase

Temporarily unavailable

Supplementary material: PDF

Zhang et al. supplementary material

Table S1

Download Zhang et al. supplementary material(PDF)
PDF 53.7 KB