The Influence of Spark Plasma Sintering Temperature on the Microstructure and Thermoelectric Properties of Al,Ga Dual-Doped ZnO

Li Han, Thanh Hung Le, Ngo Van Nong, Nini Pryds, Søren Linderoth

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

ZnO dual-doped with Al and Ga was prepared by spark plasma sintering using different sintering temperatures. The microstructural evolution and thermoelectric
properties of the samples were investigated in detail. The samples obtained with sintering temperature above 1223 K had higher relative densities and higher electronic conductivity than the sample sintered at 1073 K. These results were supported by the solid-state reaction completion rate, which suggested that sintering temperature above 1223 K would be preferable for complete solid-state reaction of the samples. The sintering mechanism of ZnO particles and microstructure evolution at different sintering temperatures were investigated by simulation of the self-Joule-heating effect of the individual particles.
Original languageEnglish
JournalJournal of Electronic Materials
Volume42
Issue number7
Pages (from-to)1573-1581
ISSN0361-5235
DOIs
Publication statusPublished - 2013

Keywords

  • Thermoelectric oxide
  • Spark plasma sintering
  • Al,Ga-codoped ZnO
  • Sintering temperature

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