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

doi:10.1016/j.ceramint.2018.05.132

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 journal › Article › peer-review

4 Citations (Scopus)

Abstract

Fe_2-xAg_xO₃ (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 Fe_2-xAg_xO₃ (0 ≤ x ≤ 0.04) powders synthesized at 150 °C for 6 h and the Fe_2-xAg_xO₃ (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 Fe_2-xAg_xO₃ (0 ≤ x ≤ 0.01) powders synthesized at 180 °C for 12 h formed the rhombohedral α-Fe₂O₃ phase with a spherical-like morphology. The Fe_1.98Ag_0.02O₃ fabricated by utilizing Fe_1.98Ag_0.02O₃ 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 language	English
Pages (from-to)	15024-15034
Number of pages	11
Journal	Ceramics International
Volume	44
Issue number	13
DOIs	https://doi.org/10.1016/j.ceramint.2018.05.132
Publication status	Published - 2018 Sept
Externally published	Yes

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.

Keywords

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

Access to Document

10.1016/j.ceramint.2018.05.132

Cite this

@article{1a2c95ebcbea4df9bc898809cd79dce2,

title = "Structural and thermoelectric properties of hydrothermal-processed Ag-doped Fe2O3 ",

abstract = "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.",

keywords = "Electrical conductivity, Electrical properties, Electron microscopy, Microstructure-final, Sintering",

author = "K. Park and Hong, {H. Y.} and Jung, {G. W.} and Kim, {D. H.} and Hakeem, {D. A.} and A. Iqbal",

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: {\textcopyright} 2018 Elsevier Ltd and Techna Group S.r.l.",

year = "2018",

month = sep,

doi = "10.1016/j.ceramint.2018.05.132",

language = "English",

volume = "44",

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T1 - Structural and thermoelectric properties of hydrothermal-processed Ag-doped Fe2O3

AU - Park, K.

AU - Hong, H. Y.

AU - Jung, G. W.

AU - Kim, D. H.

AU - Hakeem, D. A.

AU - Iqbal, A.

N1 - 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.

PY - 2018/9

Y1 - 2018/9

N2 - 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.

AB - 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.

KW - Electrical conductivity

KW - Electrical properties

KW - Electron microscopy

KW - Microstructure-final

KW - Sintering

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