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		<doi>10.1007/s10854-022-09061-4</doi>
		<issn>0957-4522</issn>
		<citationkey>TenórioOlBaGoRaMiBa:2022:ElMiAb</citationkey>
		<title>Electromagnetic and microwave absorption properties of carbonyl iron and CaCu3Ti4O12 composites in the X and Ku bands</title>
		<year>2022</year>
		<month>Nov.</month>
		<typeofwork>journal article</typeofwork>
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		<author>Tenório, Plinio Ivo Gama,</author>
		<author>Oliveira, Ana Paula Silva de,</author>
		<author>Batista, Aline Fontana,</author>
		<author>Gomes, Newton Adriano S.,</author>
		<author>Raposo, Maria Irene Bartolomeu,</author>
		<author>Mineiro, Sérgio Luiz,</author>
		<author>Baldan, Maurício Ribeiro,</author>
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		<orcid>0000-0002-7675-2589</orcid>
		<group>CMS-ETES-DIPGR-INPE-MCTI-GOV-BR</group>
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		<group>CMS-ETES-DIPGR-INPE-MCTI-GOV-BR</group>
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		<group>COPDT-CGIP-INPE-MCTI-GOV-BR</group>
		<group>COPDT-CGIP-INPE-MCTI-GOV-BR</group>
		<affiliation>Instituto Nacional de Pesquisas Espaciais (INPE)</affiliation>
		<affiliation>Instituto Nacional de Pesquisas Espaciais (INPE)</affiliation>
		<affiliation>Instituto Nacional de Pesquisas Espaciais (INPE)</affiliation>
		<affiliation>Instituto Tecnológico de Aeronáutica (ITA)</affiliation>
		<affiliation>Universidade de São Paulo (USP)</affiliation>
		<affiliation>Instituto Nacional de Pesquisas Espaciais (INPE)</affiliation>
		<affiliation>Instituto Nacional de Pesquisas Espaciais (INPE)</affiliation>
		<electronicmailaddress>plinioivo@msn.com</electronicmailaddress>
		<electronicmailaddress>silvadeoliveira.ana@gmail.com</electronicmailaddress>
		<electronicmailaddress>alinefb.quimica@hotmail.com</electronicmailaddress>
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		<electronicmailaddress></electronicmailaddress>
		<electronicmailaddress>sergiolmineiro@gmail.com</electronicmailaddress>
		<electronicmailaddress>mauricio.baldan@linpe.br</electronicmailaddress>
		<journal>Journao of Materials Science-Materials in Electronics</journal>
		<volume>33</volume>
		<number>31</number>
		<pages>24125-24136</pages>
		<transferableflag>1</transferableflag>
		<contenttype>External Contribution</contenttype>
		<versiontype>publisher</versiontype>
		<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.</abstract>
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		<language>en</language>
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