CVD–Grown CNTs on metallized fly ash cenospheres as tunable microwave

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CVD–Grown CNTs on metallized fly ash cenospheres as tunable microwave–functional fillers. / Nuriakhmetov, Zaur N.; Nerushev, Oleg A.; Betke, Igor A. et al.

In: Materials Research Bulletin, Vol. 196, 113929, 03.2026.

Research output: Contribution to journal › Article › peer-review

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@article{a97d6b0d88de4c369ce495f2753ad572,

title = "CVD–Grown CNTs on metallized fly ash cenospheres as tunable microwave–functional fillers",

abstract = "A hierarchical filler was synthesized by growing multi-walled carbon nanotubes (MWCNTs) on aluminosilicate fly ash cenospheres (FACs). The process involved depositing a uniform ferromagnetic Fe catalyst layer (55 nm) via magnetron sputtering, followed by the chemical vapor deposition of a dense MWCNT array (50–60 nm diameter). Composite samples containing 20 wt.% of this filler in a polyurethane matrix were prepared. Their microwave properties were characterized by measuring the scattering parameters (S-parameters) over the 1–13 GHz frequency range. Subsequently, the complex permittivity and permeability were extracted from the S-parameter data using the Nicolson–Ross–Weir algorithm. The results reveal that MWCNTs introduce significant resistive losses (increased ε''), while the annealed Fe layer tunes the magnetic response. This dual-component modification enables independent tuning of the composite's dielectric and magnetic properties. Our study demonstrates a scalable method for transforming low-cost industrial by-products into lightweight, functional materials with tailorable electromagnetic characteristics.",

keywords = "Carbon nanotube, Fly ash cenosphere, Microwave, Permeability, Permittivity",

author = "Nuriakhmetov, {Zaur N.} and Nerushev, {Oleg A.} and Betke, {Igor A.} and Chernousov, {Yuri D.} and Smovzh, {Dmitry V.} and Komarov, {Andrey G.} and Savichev, {Vladimir I.}",

note = "This work was supported by the Institute of Thermophysics SB RAS (Project No 122022800487–2) for sample preparation, and the Institute of Chemical Kinetics and Combustion SB RAS (Project No FWGF-2021–0003) for measurements.",

year = "2026",

month = mar,

doi = "10.1016/j.materresbull.2025.113929",

language = "English",

volume = "196",

journal = "Materials Research Bulletin",

issn = "0025-5408",

publisher = "Elsevier Science Publishing Company, Inc.",

}

RIS

TY - JOUR

T1 - CVD–Grown CNTs on metallized fly ash cenospheres as tunable microwave–functional fillers

AU - Nuriakhmetov, Zaur N.

AU - Nerushev, Oleg A.

AU - Betke, Igor A.

AU - Chernousov, Yuri D.

AU - Smovzh, Dmitry V.

AU - Komarov, Andrey G.

AU - Savichev, Vladimir I.

N1 - This work was supported by the Institute of Thermophysics SB RAS (Project No 122022800487–2) for sample preparation, and the Institute of Chemical Kinetics and Combustion SB RAS (Project No FWGF-2021–0003) for measurements.

PY - 2026/3

Y1 - 2026/3

N2 - A hierarchical filler was synthesized by growing multi-walled carbon nanotubes (MWCNTs) on aluminosilicate fly ash cenospheres (FACs). The process involved depositing a uniform ferromagnetic Fe catalyst layer (55 nm) via magnetron sputtering, followed by the chemical vapor deposition of a dense MWCNT array (50–60 nm diameter). Composite samples containing 20 wt.% of this filler in a polyurethane matrix were prepared. Their microwave properties were characterized by measuring the scattering parameters (S-parameters) over the 1–13 GHz frequency range. Subsequently, the complex permittivity and permeability were extracted from the S-parameter data using the Nicolson–Ross–Weir algorithm. The results reveal that MWCNTs introduce significant resistive losses (increased ε''), while the annealed Fe layer tunes the magnetic response. This dual-component modification enables independent tuning of the composite's dielectric and magnetic properties. Our study demonstrates a scalable method for transforming low-cost industrial by-products into lightweight, functional materials with tailorable electromagnetic characteristics.

AB - A hierarchical filler was synthesized by growing multi-walled carbon nanotubes (MWCNTs) on aluminosilicate fly ash cenospheres (FACs). The process involved depositing a uniform ferromagnetic Fe catalyst layer (55 nm) via magnetron sputtering, followed by the chemical vapor deposition of a dense MWCNT array (50–60 nm diameter). Composite samples containing 20 wt.% of this filler in a polyurethane matrix were prepared. Their microwave properties were characterized by measuring the scattering parameters (S-parameters) over the 1–13 GHz frequency range. Subsequently, the complex permittivity and permeability were extracted from the S-parameter data using the Nicolson–Ross–Weir algorithm. The results reveal that MWCNTs introduce significant resistive losses (increased ε''), while the annealed Fe layer tunes the magnetic response. This dual-component modification enables independent tuning of the composite's dielectric and magnetic properties. Our study demonstrates a scalable method for transforming low-cost industrial by-products into lightweight, functional materials with tailorable electromagnetic characteristics.

KW - Carbon nanotube

KW - Fly ash cenosphere

KW - Microwave

KW - Permeability

KW - Permittivity

UR - https://www.scopus.com/pages/publications/105023960977

UR - https://www.mendeley.com/catalogue/05e0f45d-be1b-3495-9d67-0f4e88fa4fea/

U2 - 10.1016/j.materresbull.2025.113929

DO - 10.1016/j.materresbull.2025.113929

M3 - Article

VL - 196

JO - Materials Research Bulletin

JF - Materials Research Bulletin

SN - 0025-5408

M1 - 113929

ER -

ID: 72542237

CVD–Grown CNTs on metallized fly ash cenospheres as tunable microwave–functional fillers

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