Improvement of microwave dielectric properties of Ba(Co0.7Zn0.3)1/3Nb2/3O3 ceramics prepared by solid-state reaction

Abstract : The aqueous mixing technique-assisted solid-state method was used to synthesize Ba(Co0.7Zn0.3)1/3Nb2/3O3 (BCZN) ceramics. The optimum pH of the slurry used for the BCZN synthesis was determined from plots of the Zeta potential (ζ) and the viscosity versus pH. The as-prepared materials were characterized by XRD, TG-DTA, SEM and EDS. The microwave dielectric properties are measured using a network analyzer. Ba5Nb4O15 and Ba8(Co,Zn)1Nb6O24 secondary phases were found on the surface of all samples. The ceramic materials sintered at 1350 °C were found to have a high quality factor Qf of 96132, a high dielectric constant εr of 34.5 and near-zero temperature coefficient of the resonant frequency τf of 0 ppm/°C measured at 6 GHz.
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https://hal-normandie-univ.archives-ouvertes.fr/hal-02157673
Contributeur : Christine Rouil <>
Soumis le : lundi 17 juin 2019 - 11:34:37
Dernière modification le : mercredi 2 octobre 2019 - 17:04:03

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Brahim Itaalit, Mohamed Mouyane, Jérôme Bernard, Jean-Michel Reboul, David Houivet. Improvement of microwave dielectric properties of Ba(Co0.7Zn0.3)1/3Nb2/3O3 ceramics prepared by solid-state reaction. Ceramics International, Elsevier, 2015, 41 (2), pp.1937-1942. ⟨10.1016/j.ceramint.2014.10.063⟩. ⟨hal-02157673⟩

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