Structural and thermoelectric properties of hydrothermal-processed Ag-doped Fe2O3

K. Park, H. Y. Hong, G. W. Jung, D. H. Kim, D. A. Hakeem, A. Iqbal

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)


Fe2-xAgxO3 (0 ≤ x ≤ 0.04) nanopowders with various Ag contents were synthesized at different hydrothermal reaction temperatures (150 °C and 180 °C). Their structural properties were fully investigated through an X-ray diffraction, a Fourier transform infrared spectroscopy, and an X-ray photoelectron spectroscopy. The hydrothermal reaction temperature, time, and Ag content remarkably affected the morphological characteristics and crystal structure of the synthesized powders. The Fe2-xAgxO3 (0 ≤ x ≤ 0.04) powders synthesized at 150 °C for 6 h and the Fe2-xAgxO3 (0.02 ≤ x ≤ 0.04) powders synthesized at 180 °C for 12 h formed the orthorhombic α-FeOOH phase with a rod-like morphology, whereas the Fe2-xAgxO3 (0 ≤ x ≤ 0.01) powders synthesized at 180 °C for 12 h formed the rhombohedral α-Fe2O3 phase with a spherical-like morphology. The Fe1.98Ag0.02O3 fabricated by utilizing Fe1.98Ag0.02O3 powders synthesized at 180 °C showed the largest power factor (0.64 ×10−5 Wm−1 K−2) and dimensionless figure-of-merit (0.0036) at 800 °C.

Original languageEnglish
Pages (from-to)15024-15034
Number of pages11
JournalCeramics International
Issue number13
Publication statusPublished - 2018 Sept
Externally publishedYes

Bibliographical note

Funding Information:
We also acknowledge the financial support by the Human Resources Development of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) grant funded by the Korea government Ministry of Trade, industry & Energy (No. 20164030201340 ).

Publisher Copyright:
© 2018 Elsevier Ltd and Techna Group S.r.l.


  • Electrical conductivity
  • Electrical properties
  • Electron microscopy
  • Microstructure-final
  • Sintering

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Process Chemistry and Technology
  • Surfaces, Coatings and Films
  • Materials Chemistry


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