Microwave dielectric properties of barium substituted screen printed CaBi2Nb2O9 ceramic thick films

Study on structure, microstructure and microwave dielectric characteristics of CaV2O6 and (Ca0.95M0.05)V2O6 (M=Zn, Ba) ceramics

“…Compared to Zn 2+ ion, Ba 2+ has large ionic radius (1.38 Å, CN 6), leading to an increase in unit cell volume and a shift to lower angle. These results agree with the findings of other studies, in which substitution of Ba 2+ and Zn 2+ ions for Ca 2+ caused a shift to lower and higher angles, respectively . Based on the results of XRD analysis and taking into consideration that there is a considerable difference between the ionic radius of the substituted ions (Zn 2+ and B 2+ ) and that of V 5+ as well as O 2− , it is assumed that Zn 2+ and Ba 2+ ions might be substituted for Ca 2+ lying in octahedral spaces in the structure of CaV 2 O 6 ceramic.…”

“…These results agree with the findings of other studies, in which substitution of Ba 2+ and Zn 2+ ions for Ca 2+ shift to lower and higher angles, respectively. 26,27 Based on the results of XRD analysis and taking into consideration that there is a considerable difference between the ionic radius of the substituted ions (Zn 2+ and B 2+ ) and that of V 5+ as well as O 2− , it is assumed that Zn 2+ and Ba 2+ ions might be substituted for Ca 2+ lying in octahedral spaces in the structure of CaV 2 O 6 ceramic. Figure 3 illustrates the variation in the relative density of CV, CZV and CBV ceramics sintered at different temperatures for 4 h. It is clear that the relative density of CZV specimens is higher than that of CV and a shift of sintering curve to lower temperatures compared to CV is obvious for the figure of CZV, that it could be associated with the positive effect of Zn 2+ substitution on the sinterability.…”

An overview of the mathematical modelling of perovskite solar cells towards achieving highly efficient perovskite devices

“…Phadtare et al 29 used the approach via the microstrip ring resonator (MSRR) to evaluate the microwave dielectric features of the multi-walled carbon nanotubes (MWCNT) thick film, Ca 1−x Ba x Bi 2…”

Structural and Magnetic Properties of Cr-Zn Nanoferrites Synthesized by Chemical Co-Precipitation Method

“…From the skeletal and X-ray densities of the samples, the percentage porosity (p) was determined using the following relation 32) : (5) The tetrahedral and octahedral site bond lengths (A-O, B-O) and ionic radii (r A , r B ) of the cubic spinel structures were calculated using the following formulae 33) .…”

“…ecently, tertiary mixed metal oxide nanoparticles with cubic spinel structures have been identified as the most promising materials for electrochemical energy storage applications, televisions, transformers, magnetic recording media, biomedical applications, etc., because of their exceptional physicochemical, mechanical, magnetic, and dielectric properties. [1][2][3][4][5][6] Extensive efforts have been devoted to developing a modest, stable, and effective synthesis process for nanosized materials, which can control their structural parameters and impart a high specific surface area. 7,8) In recent decades, size-tunable ferrite particles with a cubic spinel structure have been identified as remarkable materials because of their exceptional physicochemical properties.…”