Efficiently synthesized n-type CoSb3 thermoelectric alloys under TGZM effect

Dou Li, Shuangming Li, Xuguang Li, Bin Yang, Hong Zhong

Research output: Contribution to journalArticlepeer-review

14 Scopus citations

Abstract

Skutterudite compounds, the structure of “phonon glass electron crystal” (PGEC), possess excellent thermoelectric properties. Here, temperature gradient zone melting combined with hot pressing technique (TGZM-HP) was employed to synthesize n-type skutterudite CexNi1.5Co2.5Sb12 thermoelectric material. By doping element Ce, the carrier concentration of the alloy was optimized efficiently and the total thermal conductivity declined. For the TGZM-HP Ce0.6Ni1.5Co2.5Sb12 alloy, the power factor PF reaches to 1350 μW/(mK2), and the lattice thermal conductivity is dropped to 1.62 Wm−1K1 at 850 K, corresponding to an improved figure of merit ZT of 0.45. Importantly, compared with the traditional synthesis methods, this technique can precisely control the formation of thermometric phase and the preparation time is reduced remarkably.

Original languageEnglish
Article number105542
JournalMaterials Science in Semiconductor Processing
Volume123
DOIs
StatePublished - 1 Mar 2021

Keywords

  • Doped CoSb
  • Mushy zone
  • TGZM-HP
  • Thermoelectric properties

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