Influence of the addition of CaTiO3 on the microwave dielectric properties of the BaMoO4 matrix

Nobrega, F.; Abreu, R. F.; Colares, D. da M.; Silva, M.A.S.; Carmo, F. F. do; Abreu, T. O.; Nascimento, João Paulo Costa do; Sales, Juscelino Chaves; Silva, Ronaldo S.; Góes, J.C.; Sombra, A. S. B.

doi:10.1016/j.matchemphys.2022.126478

Cited by 7 publications

(3 citation statements)

References 23 publications

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“…Depending on the substitution, this drop can be explained by a loss of stored energy in the ceramic samples [53] or can be demonstrated with the formation of phase-type BaMoO 4 , characterized by low dielectric permittivity, as F.A.C. Nobrega et al [49] confirmed. The dielectric losses, tan(δ) = ε r ε r , in the ferroelectric phase were reasonably low for all of the compositions examined, as shown in Figure 5a-d.…”

Section: Characterization With Raman Spectroscopymentioning

confidence: 91%

“…G. Yanalak et al have already provided in-depth descriptions of the BaMoO 4 phase [48]. A structure of this type is consistently favored, as it promotes better interaction between the ferroelectric and BaMoO 4 phases, consequently leading to a robust microwave dielectric effect in composites [49]. Improvement in the volume of the composites was readily observed as the lattice parameters, a, b, and c, were somewhat raised with rising MoO 3 content in the ferroelectric phase.…”

Section: X-ray Diffractogramsmentioning

confidence: 99%

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confidence: 93%

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Crystallographic, Structural, and Electrical Properties of W6+ Substituted with Mo6+ in Crystalline Phases such as TTB Structure

et al. 2023

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Owing to their low dielectric loss and high permittivity values, dielectric ceramics have garnered a lot of interest from the scientific and industrial sectors. These properties allow for their downsizing and use in a variety of electronic circuits. This present work focuses on the impact of the substitution of W6+ with Mo6+ on the structural and dielectric features of the crystalline phases in a similar TTB structure within the Ba0.54Na0.46Nb1.29W(0.37−x)MoxO5 system, with 0 ≤ x ≤ 0.33 mol%. These crystalline phases were elaborated using the conventional solid-state reaction method and analyzed with XRD, Raman, and dielectric techniques. The Rietveld refinement method showed that all these phases are characterized by tetragonal structure and the P4bm space group. The Raman spectra corresponded well to a TTB-like structure, and all the bands were assigned. The dielectric measurements of the prepared ceramic samples facilitated the determination of their phase transition temperature (Tc) and the dielectric responses. This investigation focused on determining dielectric permittivity (ε′) and its correlation with increases in MoO3 content in the ceramic structure.

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Section: Characterization With Raman Spectroscopymentioning

confidence: 91%

Section: X-ray Diffractogramsmentioning

confidence: 99%