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Thermoelectric properties of silicon germanium alloy nanocomposite fabricated by mechanical alloying and spark plasma sintering

  • Harbin Institute of Technology Shenzhen

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

High dense p-type Si95Ge5 doped with nano-Si70Ge30B5particles thermoelectric materials were firstly fabricated by mechanical alloying (MA) and spark plasma sintering (SPS) method. The effects of different nano-Si70Ge30B5 doping content on the thermoelectric and phase properties were studied. A dimensionless thermoelectric figure-of-merit (ZT) of 0.47 at 710K in p-type nanocomposite bulk silicon germanium (SiGe) alloys is achieved. The enhancement of ZT is due to a large reduction of thermal conductivity caused by the increased grain boundaries of the numerous nanograins that effectively scatter long wavelength phonons.

Original languageEnglish
Title of host publicationAdvanced Materials and Engineering Materials V
EditorsKatsuyuki Kida
PublisherTrans Tech Publications Ltd
Pages70-75
Number of pages6
ISBN (Print)9783038357018
DOIs
StatePublished - 2016
Externally publishedYes
EventInternational Conference on Advanced Materials and Engineering Materials, ICAMEM 2016 - Hong Kong, China
Duration: 15 Apr 201616 Apr 2016

Publication series

NameKey Engineering Materials
Volume703
ISSN (Print)1013-9826
ISSN (Electronic)1662-9795

Conference

ConferenceInternational Conference on Advanced Materials and Engineering Materials, ICAMEM 2016
Country/TerritoryChina
CityHong Kong
Period15/04/1616/04/16

Keywords

  • Mechanical alloying
  • SiGe
  • Spark plasma sintering
  • Thermoelectric properties

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