Next Article in Journal
The Effect of Milling Time on the Microstructural Characteristics and Strengthening Mechanisms of NiMo-SiC Alloys Prepared via Powder Metallurgy
Next Article in Special Issue
Self-Developed Testing System for Determining the Temperature Behavior of Concrete
Previous Article in Journal
The Microstructural Evolution of Vacuum Brazed 1Cr18Ni9Ti Using Various Filler Metals
Previous Article in Special Issue
Effects of Heat-Treated Wood Particles on the Physico-Mechanical Properties and Extended Creep Behavior of Wood/Recycled-HDPE Composites Using the Time–Temperature Superposition Principle
Article Menu
Issue 4 (April) cover image

Export Article

Open AccessArticle
Materials 2017, 10(4), 386; doi:10.3390/ma10040386

A Practical Approach to Evaluate Lattice Thermal Conductivity in Two-Phase Thermoelectric Alloys for Energy Applications

Department of Materials Science and Engineering, Technion–Israel Institute of Technology, 32000 Haifa, Israel
Academic Editor: Ming Hu
Received: 23 February 2017 / Revised: 30 March 2017 / Accepted: 1 April 2017 / Published: 5 April 2017
(This article belongs to the Special Issue Thermal Sciences and Thermodynamics of Materials)
View Full-Text   |   Download PDF [3676 KB, uploaded 7 April 2017]   |  

Abstract

Modelling of the effects of materials’ microstructure on thermal transport is an essential tool for materials design, and is particularly relevant for thermoelectric (TE) materials converting heat into electrical energy. Precipitates dispersed in a TE matrix act as phonon-scattering centers, thereby reducing thermal conductivity. We introduce a practical approach to tailor a definite precipitate size distribution for a given TE matrix, and implement it for PbTe. We evaluate vibrational properties from first principles, and develop an expression for phonon relaxation time that considers both matrix vibrational properties and precipitate size distribution. This provides us with guidelines for optimizing thermal conductivity. View Full-Text
Keywords: thermal conductivity; thermoelectric materials; first principles calculations; vibrational properties; lead−telluride-based compounds thermal conductivity; thermoelectric materials; first principles calculations; vibrational properties; lead−telluride-based compounds
Figures

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

Scifeed alert for new publications

Never miss any articles matching your research from any publisher
  • Get alerts for new papers matching your research
  • Find out the new papers from selected authors
  • Updated daily for 49'000+ journals and 6000+ publishers
  • Define your Scifeed now

SciFeed Share & Cite This Article

MDPI and ACS Style

Amouyal, Y. A Practical Approach to Evaluate Lattice Thermal Conductivity in Two-Phase Thermoelectric Alloys for Energy Applications. Materials 2017, 10, 386.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Materials EISSN 1996-1944 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top