RT Journal Article
T1 Generation of defective few-layered graphene mesostructures by high-energy ball milling and their combination with FeSiCuNbB microwires for reinforcing microwave absorbing properties
A1 López Sánchez, Jesús
A1 Peña Moreno, Álvaro
A1 Serrano, Aída
A1 Del Campo, Adolfo
A1 Rodríguez De La Fuente, Óscar
A1 Carmona Tejero, Noemí
A1 Matatagui Cruz, Daniel
A1 Horrillo, María del Carmen
A1 Rubio Zazo, Juan
A1 Navarro Palma, Elena
A1 Marín Palacios, María Pilar
AB Defective few-layered graphene mesostructures (DFLGMs) are produced from graphite flakes by high-energy milling processes. We obtain an accurate control of the generated mesostructures, as well as of the amount and classification of the structural defects formed, providing a functional material for microwave absorption purposes. Working under far-field conditions, competitive values of minimum reflection loss coefficient (RL_(min)) = −21.76 dB and EAB = 4.77 dB are achieved when DFLGMs are immersed in paints at a low volume fraction (1.95%). One step forward is developed by combining them with the excellent absorption behavior that offers amorphous Fe_(73.5)Si_(13.5)B_(9)Cu_(1)Nb microwires (MWs), varying their filling contents, which are below 3%. We obtain a RLmin improvement of 47% (−53.08 dB) and an EAB enhancement of 137% (4 dB) compared to those obtained by MW-based paints. Furthermore, a f_(min) tunability is demonstrated, maintaining similar RL_(min) and EAB values, irrespective of an ideal matching thickness. In this scenario, the Maxwell-Garnet standard model is valid, and dielectric losses mainly come from multiple reflections, interfacial and dielectric polarizations, which greatly boost the microwave attenuation of MWs. The present concept can remarkably enhance not only the MW attenuation but can also apply to other microwave absorption architectures of technological interest by adding low quantities of DFLGMs.
PB American Chemical Society
SN 1944-8244
YR 2023
FD 2023
LK https://hdl.handle.net/20.500.14352/91642
UL https://hdl.handle.net/20.500.14352/91642
LA eng
NO López-Sánchez, J., Peña, Á., Serrano, A., Del Campo, A., Rodríguez De La Fuente, Ó., Carmona, N., Matatagui, D., Horrillo, M.D.C., Rubio-Zuazo, J., Navarro, E., Marín, P.: Generation of Defective Few-Layered Graphene Mesostructures by High-Energy Ball Milling and Their Combination with FeSiCuNbB Microwires for Reinforcing Microwave Absorbing Properties. ACS Appl. Mater. Interfaces. 15, 3507-3521 (2023). https://doi.org/10.1021/acsami.2c19886
NO Ministerio de Ciencia, Innovación y Universidades (España)
NO Ministerio de Asuntos Economicos y Transformacion Digital (España)
NO Comunidad de Madrid
DS Docta Complutense
RD 17 abr 2025