New model to tune the dielectric properties of dense and half-dense sintered polycrystalline cu-doped Ni–Zn ferrite
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Otros documentos de la autoría: Vicente-Agut, Nuria; Mormeneo-Segarra, Andrés; Clausell-Terol, Carolina; Barba-Juan, Antonio
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Título
New model to tune the dielectric properties of dense and half-dense sintered polycrystalline cu-doped Ni–Zn ferriteAutoría
Fecha de publicación
2021-11-30Editor
Elsevier; European Ceramic SocietyISSN
0955-2219Cita bibliográfica
VICENTE, Nuria, et al. New model to tune the dielectric properties of dense and half-dense sintered polycrystalline cu-doped Ni–Zn ferrite. Journal of the European Ceramic Society, 2022, vol. 42, no 3, p. 965-972.Tipo de documento
info:eu-repo/semantics/articleVersión
info:eu-repo/semantics/publishedVersionPalabras clave / Materias
Resumen
Sintered polycrystalline Cu-doped Ni–Zn ferrite specimens have been successfully prepared by a conventional ceramic method using different pressure-temperature-time cycles. The studied samples, with an average grain ... [+]
Sintered polycrystalline Cu-doped Ni–Zn ferrite specimens have been successfully prepared by a conventional ceramic method using different pressure-temperature-time cycles. The studied samples, with an average grain size of 5–25 μm and a porosity less than 0.20, exhibited a high effective complex permittivity-real part () and a minimum dielectric loss above 1 GHz.
was successfully calculated using the Bruggeman-Landauer equation for the lowest angular frequencies and the Jayasundere-Smith equation for the highest one. To accurately predict the values of , both equations must be improved considering the Zheng approach. The need to change the model highlights the change in the polarization mechanism that occurs at high angular frequencies.
The two proposed modified equations allow predicting the for a dense and half-dense ferrite from its microstructure (porosity) and its constituent permittivities (grain and air). [-]
Publicado en
Journal of the European Ceramic Society, 42 (2022) 965–972Datos relacionados
https://ars.els-cdn.com/content/image/1-s2.0-S0955221921008347-mmc1.docxEntidad financiadora
Ministerio de Economía y Competitividad (Spain) | Universitat Jaume I
Código del proyecto o subvención
MAT2016–76320-R | UJIB2017-48 | UJIB2020-13 | POSDOC/2020/04
Derechos de acceso
0955-2219/© 2021 The Authors.
info:eu-repo/semantics/openAccess
info:eu-repo/semantics/openAccess
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