@Article{TenórioOlBaGoRaMiBa:2022:ElMiAb,
author = "Ten{\'o}rio, Plinio Ivo Gama and Oliveira, Ana Paula Silva de and
Batista, Aline Fontana and Gomes, Newton Adriano S. and Raposo,
Maria Irene Bartolomeu and Mineiro, S{\'e}rgio Luiz and Baldan,
Maur{\'{\i}}cio Ribeiro",
affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)} and {Instituto
Nacional de Pesquisas Espaciais (INPE)} and {Instituto Nacional de
Pesquisas Espaciais (INPE)} and {Instituto Tecnol{\'o}gico de
Aeron{\'a}utica (ITA)} and {Universidade de S{\~a}o Paulo (USP)}
and {Instituto Nacional de Pesquisas Espaciais (INPE)} and
{Instituto Nacional de Pesquisas Espaciais (INPE)}",
title = "Electromagnetic and microwave absorption properties of carbonyl
iron and CaCu3Ti4O12 composites in the X and Ku bands",
journal = "Journao of Materials Science-Materials in Electronics",
year = "2022",
volume = "33",
number = "31",
pages = "24125--24136",
month = "Nov.",
abstract = "Electronic devices and telecommunication systems operating in the
gigahertz range have increased the problems related to
electromagnetic interference. Radar absorber materials (RAM) are
being developed to overcome this situation. Due to its dielectric
properties, one option for this application is high dielectric
constant materials, such as CaCu3Ti4O12 (CCTO). In this work, a
mixture of CCTO and carbonyl iron powder (CI) was prepared and
processed by solid-state reaction, with 200 degrees C and 300
degrees C sets for 2 h. The CCTO + CI mixtures were structural and
morphologically characterized and used as fillers in a polymer
matrix. Three composites were prepared using the mixed additive,
and the samples were heated. Samples, with a thickness of 2 mm,
were designed to study the electromagnetic properties of the
material and absorption potential for microwaves in the frequency
range of the X (8.2 to 12.4 GHz) and Ku (12.4 to 18 GHz) bands.
These bands are used more extensively in defense, antennas, space,
and others. In the X band, only the sample CCTO + CI 300 degrees
C-2 h shows good absorption performance, and the effective
bandwidth (less than - 10 dB) was 1.29 GHz. Finally, in Ku band,
the reflection loss results for the samples CCTO + CI 200 degrees
C-2 h and CCTO + CI 300 degrees C-2 h show a bandwidth 2.9 GHz and
4.9 GHz, respectively, with more than 90% reflection, and the
maximum value for RL was - 15.6 dB at 13.81 GHz and - 25.33 dB at
15.24 GHz, respectively.",
doi = "10.1007/s10854-022-09061-4",
url = "http://dx.doi.org/10.1007/s10854-022-09061-4",
issn = "0957-4522",
language = "en",
targetfile = "s10854-022-09061-4.pdf",
urlaccessdate = "06 jun. 2024"
}