Issue 16, 2018

Scanning laser melting for rapid and massive fabrication of filled skutterudites with high thermoelectric performance

Abstract

Skutterudite-based thermoelectric materials have great potential for use in waste heat recovery, but the conventional melting–quench–annealing process is not suitable for large-scale fabrication. In this study, we developed a rapid fabrication technique that combines scanning laser melting and spark plasma sintering to synthesize bulk n-type and p-type filled skutterudites. The kinetics process and microstructure evolution during the scanning laser melting and annealing were systematically investigated. Due to fast solidification in scanning laser melting, the peritectic segregation size of precursor resultants is confined to several microns, which leads to great shortening of the fabrication period of filled skutterudites. The as-synthesized n-type and p-type filled skutterudites achieve excellent dimensionless figures of merit: ZT ∼ 1.23 at 850 K for Yb0.4Co4Sb12.1; ZT ∼ 1.09 at 700 K for In0.5Co4Sb12.1; ZT ∼ 0.79 at 750 K for Ce0.95Fe3CoSb12.1, which are among the highest values of single filled skutterudites. The shortened processing period and enhanced thermoelectric performance make this novel synthesis method suitable for industrial-level large-scale fabrication of skutterudite-based thermoelectric materials.

Graphical abstract: Scanning laser melting for rapid and massive fabrication of filled skutterudites with high thermoelectric performance

Article information

Article type
Communication
Submitted
12 2月 2018
Accepted
28 3月 2018
First published
28 3月 2018

J. Mater. Chem. A, 2018,6, 6772-6779

Scanning laser melting for rapid and massive fabrication of filled skutterudites with high thermoelectric performance

F. Chen, R. Liu, Z. Yao, Y. Xing, S. Bai and L. Chen, J. Mater. Chem. A, 2018, 6, 6772 DOI: 10.1039/C8TA01504J

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements