Rapid fabrication and transport properties of n-type Co4 -xNixSb12 via modified polyol process synthesis combined with evacuated-and-encapsulated sintering

Ahmad Gharleghi, Chia-Jyi Liu

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

Single phase of Co4-xNixSb 12 compounds (x = 0.0, 1.5ε, 2.5ε, 3.0ε, 4.0ε, and ε = 0.03125) can be synthesized using the modified polyol reaction for 5 min., following by evacuated-and-encapsulated sintering at 853 K in a short period of time of 5 h. The sintered samples are characterized using X-ray diffraction, scanning electron microscopy, electrical resistivity, thermopower, and Hall measurements. Compared with the non-doped CoSb3, the power factor of Co4-xNixSb12 is enhanced up to 25 times by decreasing the electrical resistivity and reducing the bipolar compensation of thermopower. The simultaneous reduction of fabrication time and preparation temperature coupled with the comparable power factor with the same cobalt skutterudite system prepared via those expensive solid state methods should make this synthesis process of interest for commercial applications.

Original languageEnglish
Pages (from-to)277-282
Number of pages6
JournalJournal of Alloys and Compounds
Volume592
DOIs
Publication statusPublished - 2014 Apr 15

Fingerprint

Polyols
Thermoelectric power
Transport properties
Sintering
Fabrication
Cobalt
X ray diffraction
Scanning electron microscopy
Temperature
polyol
Compensation and Redress

All Science Journal Classification (ASJC) codes

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

Cite this

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title = "Rapid fabrication and transport properties of n-type Co4 -xNixSb12 via modified polyol process synthesis combined with evacuated-and-encapsulated sintering",
abstract = "Single phase of Co4-xNixSb 12 compounds (x = 0.0, 1.5ε, 2.5ε, 3.0ε, 4.0ε, and ε = 0.03125) can be synthesized using the modified polyol reaction for 5 min., following by evacuated-and-encapsulated sintering at 853 K in a short period of time of 5 h. The sintered samples are characterized using X-ray diffraction, scanning electron microscopy, electrical resistivity, thermopower, and Hall measurements. Compared with the non-doped CoSb3, the power factor of Co4-xNixSb12 is enhanced up to 25 times by decreasing the electrical resistivity and reducing the bipolar compensation of thermopower. The simultaneous reduction of fabrication time and preparation temperature coupled with the comparable power factor with the same cobalt skutterudite system prepared via those expensive solid state methods should make this synthesis process of interest for commercial applications.",
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T1 - Rapid fabrication and transport properties of n-type Co4 -xNixSb12 via modified polyol process synthesis combined with evacuated-and-encapsulated sintering

AU - Gharleghi, Ahmad

AU - Liu, Chia-Jyi

PY - 2014/4/15

Y1 - 2014/4/15

N2 - Single phase of Co4-xNixSb 12 compounds (x = 0.0, 1.5ε, 2.5ε, 3.0ε, 4.0ε, and ε = 0.03125) can be synthesized using the modified polyol reaction for 5 min., following by evacuated-and-encapsulated sintering at 853 K in a short period of time of 5 h. The sintered samples are characterized using X-ray diffraction, scanning electron microscopy, electrical resistivity, thermopower, and Hall measurements. Compared with the non-doped CoSb3, the power factor of Co4-xNixSb12 is enhanced up to 25 times by decreasing the electrical resistivity and reducing the bipolar compensation of thermopower. The simultaneous reduction of fabrication time and preparation temperature coupled with the comparable power factor with the same cobalt skutterudite system prepared via those expensive solid state methods should make this synthesis process of interest for commercial applications.

AB - Single phase of Co4-xNixSb 12 compounds (x = 0.0, 1.5ε, 2.5ε, 3.0ε, 4.0ε, and ε = 0.03125) can be synthesized using the modified polyol reaction for 5 min., following by evacuated-and-encapsulated sintering at 853 K in a short period of time of 5 h. The sintered samples are characterized using X-ray diffraction, scanning electron microscopy, electrical resistivity, thermopower, and Hall measurements. Compared with the non-doped CoSb3, the power factor of Co4-xNixSb12 is enhanced up to 25 times by decreasing the electrical resistivity and reducing the bipolar compensation of thermopower. The simultaneous reduction of fabrication time and preparation temperature coupled with the comparable power factor with the same cobalt skutterudite system prepared via those expensive solid state methods should make this synthesis process of interest for commercial applications.

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