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Peer-reviewedCC BYMaterials (Basel, Switzerland)

Characterization of Coal Fly Ash by Electrical Impedance Spectroscopy, Magnetic Susceptibility and Mössbauer Phase Composition.

  • Zdzisław Adamczyk1
  • Joanna Komorek2
  • Barbara Solecka3
  • Grzegorz Tytko4
  • Sylwia Dytłow5
  • Andrzej Nowrot2
  • Mariola Kądziołka-Gaweł6
6 affiliations
  1. 1Department of Applied Geology, Silesian University of Technology, Akademicka 2, 44-100 Gliwice, Poland.
  2. 2Department of Electrical Engineering and Automation in Industry, Silesian University of Technology, Akademicka 2, 44-100 Gliwice, Poland.
  3. 3Institute of Physics, Centre for Science and Education, Division of Applied Physics, Silesian University of Technology, Konarskiego 22B, 44-100 Gliwice, Poland.
  4. 4Faculty of Automatic Control, Electronic and Computer Science, Silesian University of Technology, Akademicka 16, 44-100 Gliwice, Poland.
  5. 5Institute of Geophysics, Polish Academy of Sciences, Księcia Janusza 64, 01-452 Warsaw, Poland.
  6. 6Institute of Physics, University of Silesia, 75 Pułku Piechoty 1, 41-500 Chorzow, Poland.
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Abstract

Fly ashes contain iron-bearing phases with diverse magnetic properties, and their rapid identification may support assessment of their potential for raw-material recovery. The aim of this study is to develop a non-destructive method for characterizing ashes produced from lignite and hard coal combustion. The novel approach integrates electrical impedance spectroscopy (EIS) with magnetic susceptibility measurements and Mössbauer spectroscopy. The investigations were carried out on ashes collected from storage silos and electrostatic precipitators located at power plants. Forster-type impedance characteristics enabled differentiation of the ashes both across a broad frequency range and at a single frequency of 131.8 kHz. The share of spinels among the magnetically ordered phases was very strongly correlated with the real component of impedance and magnetic susceptibility (rs = 0.964). The results indicate that impedance spectroscopy can be used for a rapid, non-destructive assessment of the proportion of ferrimagnetic phases and the ash suitability for beneficiation.

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Cite

BibTeXRIS
BibTeX
@article{adamczyk2026characterization,
  title = {{Characterization of Coal Fly Ash by Electrical Impedance Spectroscopy, Magnetic Susceptibility and Mössbauer Phase Composition.}},
  author = {Zdzisław Adamczyk and Joanna Komorek and Barbara Solecka and Grzegorz Tytko and Sylwia Dytłow and Andrzej Nowrot and Mariola Kądziołka-Gaweł},
  journal = {Materials (Basel, Switzerland)},
  year = {2026},
  month = oct,
  doi = {10.3390/ma19194232},
  url = {https://europepmc.org/article/MED/42882730},
  note = {CC BY},
}
RIS
TY  - JOUR
TI  - Characterization of Coal Fly Ash by Electrical Impedance Spectroscopy, Magnetic Susceptibility and Mössbauer Phase Composition.
AU  - Zdzisław Adamczyk
AU  - Joanna Komorek
AU  - Barbara Solecka
AU  - Grzegorz Tytko
AU  - Sylwia Dytłow
AU  - Andrzej Nowrot
AU  - Mariola Kądziołka-Gaweł
PY  - 2026
DA  - 2026/10/06
JO  - Materials (Basel, Switzerland)
DO  - 10.3390/ma19194232
UR  - https://europepmc.org/article/MED/42882730
AB  - Fly ashes contain iron-bearing phases with diverse magnetic properties, and their rapid identification may support assessment of their potential for raw-material recovery. The aim of this study is to develop a non-destructive method for characterizing ashes produced from lignite and hard coal combustion. The novel approach integrates electrical impedance spectroscopy (EIS) with magnetic susceptibility measurements and Mössbauer spectroscopy. The investigations were carried out on ashes collected from storage silos and electrostatic precipitators located at power plants. Forster-type impedance characteristics enabled differentiation of the ashes both across a broad frequency range and at a single frequency of 131.8 kHz. The share of spinels among the magnetically ordered phases was very strongly correlated with the real component of impedance and magnetic susceptibility (rs = 0.964). The results indicate that impedance spectroscopy can be used for a rapid, non-destructive assessment of the proportion of ferrimagnetic phases and the ash suitability for beneficiation.
SN  - 1996-1944
ER  -