Cement nanocomposite with CoFe2O4 nanoparticles and graphite flakes for microwave absorption in X-band frequency

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F26232511%3A_____%2F26%3AN0000007" target="_blank" >RIV/26232511:_____/26:N0000007 - isvavai.cz</a>

Result on the web

<a href="https://www.sciencedirect.com/science/article/pii/S2352710226005462" target="_blank" >https://www.sciencedirect.com/science/article/pii/S2352710226005462</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jobe.2026.115725" target="_blank" >10.1016/j.jobe.2026.115725</a>

Result language

angličtina

Original language name

Cement nanocomposite with CoFe2O4 nanoparticles and graphite flakes for microwave absorption in X-band frequency

Original language description

This study reports the microwave absorption in cementitious composites through the incorporation of graphite flakes (GF) and ultrasonically synthesized spherical cobalt ferrite (CoFe2O4) nanoparticles (CF). Composites with 2.5 wt% GF and 7.5 wt% CF were prepared and characterized for their structural, magnetic, mechanical, and electromagnetic properties. The phase purity of CF nanoparticles and the presence of fillers in the cement matrix were confirmed by Xray diffraction (XRD). The morphology, distribution, and interfacial interactions between the fillers and the cement matrix were examined using field emission scanning electron microscopy (FESEM), energy dispersive X-ray spectroscopy (EDS), and X-ray photoelectron spectroscopy (XPS). Magnetic hysteresis loops revealed a saturation magnetization of 5.8 emu/g for the cement nanocomposite, confirming the retention of some magnetic behaviour of CF in cement matrix. The results demonstrated excellent microwave absorption performance in X-band range, with a minimum reflection loss (RLmin) of-41.9 dB at 10.59 GHz and an effective absorption bandwidth (EAB) of 2.4 GHz (below-10 dB) at a thickness of only 2 mm, corresponding to microwave absorption efficiency of 99.994%. The obtained microwave absorption performance is attributed to the synergistic effects of permittivity and permeability, favourable impedance matching, and high attenuation constant due to the combined dielectric loss from GF and magnetic loss from CF. Despite a slight reduction in mechanical strength compared to the reference, the composite meets standard structural requirements. This work highlights the potential of using conductive and magnetic nanofillers to develop high-performance cementitious composites for X-band microwave absorption applications.

Czech name

—

Czech description

—

Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

20100 - Civil engineering

Project

—

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2026

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Journal of Building Engineering

ISSN

—

e-ISSN

2352-7102

Volume of the periodical

121

Issue of the periodical within the volume

MAR 1 2026

Country of publishing house

NL - THE KINGDOM OF THE NETHERLANDS

Number of pages

17

Pages from-to

—

UT code for WoS article

001708780700001

EID of the result in the Scopus database

—