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@Article{AmaranteSiLiLeMaMiBr:2019:SiBeEl,
               author = "Amarante, Mayara dos Santos and Silva J{\'u}nior, Eduardo de 
                         Oliveira and Lima, Rodrigo Gabas Amaro de and Lente, Manuel 
                         Henrique and Machado, Jo{\~a}o Paulo Barros and Migliano, 
                         Antonior Carlos da Cunha and Brito, Vera L{\'u}cia Oth{\'e}ro 
                         de",
          affiliation = "{Instituto Tecnol{\'o}gico de Aeron{\'a}utica (ITA)} and 
                         {Instituto de Estudos Avan{\c{c}}ados (IEAv)} and {Instituto 
                         Tecnol{\'o}gico de Aeron{\'a}utica (ITA)} and {Universidade 
                         Federal de S{\~a}o Paulo (UNIFESP)} and {Instituto Nacional de 
                         Pesquisas Espaciais (INPE)} and {Instituto Tecnol{\'o}gico de 
                         Aeron{\'a}utica (ITA)} and {Instituto Tecnol{\'o}gico de 
                         Aeron{\'a}utica (ITA)}",
                title = "Sintering behavior and electromagnetic properties of a Ni–Co 
                         ferrite/NiO biphasic ceramic",
              journal = "Materials Research Express",
                 year = "2019",
               volume = "6",
                pages = "076110",
             keywords = "ferrites, complex magnetic permeability, complex permittivity, 
                         dilatometry, ceramics processing, sintering, electronic 
                         materials.",
             abstract = "Tailoring of the electromagnetic properties of materials is a key 
                         issue for the development of electronics. Literature has shown 
                         that NiCo ferrites have many applications in electronic devices, 
                         such as sensors, antennas, and miniaturized devices. In this work, 
                         a biphasic ferrite-based ceramic was produced by the standard 
                         ceramic method, starting from iron, nickel, and cobalt oxides as 
                         raw materials with a (Ni + Co):Fe atomic proportion of 1.3:1.7. 
                         EDS microanalysis and x-ray diffractometry of the sintered sample 
                         revealed the presence of a major fraction of ferrite phase 
                         (estimated as Ni0.8Co0.2Fe2O4) and a NiO.CoO second phase with NiO 
                         in majority. The complex magnetic permeability of the sintered 
                         biphasic sample was evaluated in frequencies between 6 MHz 13 GHz 
                         and its complex permittivity was evaluated in frequencies between 
                         912 GHz. Comparing to a reference NiCo ferrite sample and to data 
                         from literature, it was verified that the presence of the NiO. CoO 
                         second phase reduced the losses of the material in GHz 
                         frequencies, maintaining the typical \ε\′ levels of a 
                         ferrite material. The results suggest that adjustment of the 
                         oxides proportion on the formulation step of the ferrite 
                         processing is a simple an effective way of tailoring the 
                         electromagnetic properties of the ferrite.",
                  doi = "10.1088/2053-1591/ab160b",
                  url = "http://dx.doi.org/10.1088/2053-1591/ab160b",
                 issn = "2053-1591",
             language = "en",
           targetfile = "amarante_sintering.pdf",
        urlaccessdate = "05 dez. 2020"
}


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