Microwave Dielectric Properties Study of the La2O3 Additions on the SrBi2Nb2O9 Matrix

Abreu, R. F.; Saturno, S. O.; Sancho, E. O.; Gouveia, D. X.; Sombra, A. S. B.

doi:10.1007/s11664-018-06859-z

Cited by 7 publications

(1 citation statement)

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“…In addition, these materials have high resistance to fatigue and their potential use in random access memories has been constantly investigated (SANCHO et al, 2013;SINGH et al, 2018;WU et al, 2017). Recent studies show the possibility of application as dielectric resonator antennas (DRA) of the SBN matrix with additions of Bi 2 O 3 or La 2 O 3 (ABREU et al, 2019;ABREU et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

EFFECTS OF La2O3 AND Bi2O3 ADDITIONS ON THE MICROWAVE DIELECTRIC AND ANTENNA PROPERTIES OF SrBi2Nb2O9 CERAMIC MATRIX

Abreu

Silva

Saturno

et al. 2021

jme

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This work presents a comparison between the dielectric properties of the SrBi 2 Nb 2 O 9 (SBN) ceramic matrix and the individual additions of Bi 2 O 3 and La 2 O 3 , suggesting the material that would be most suitable for microwave applications. The SBN sample was synthesized by solid-state reaction, and the X-ray diffraction method (XRD) was used for the structural characterization of the materials analyzed in this study. Thermal stability of the samples was measured experimentally by studying the temperature coefficient of resonant frequency (τ f ) the results confirm that the individual additions of 15 wt% of Bi 2 O 3 or La 2 O 3 improved the thermostability of the composites. The Hakki-Coleman method was used to obtain the dielectric properties in the microwave range, and it is possible to observe that the dielectric permittivity of the composites increased, while their loss tangents decreased. The numerical simulation demonstrated the functioning of the materials as dielectric resonating antennas (DRA), with a reflection coefficient below -10 dB in all samples.

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