Implementing a sol-gel route to adjust the structural and dielectric characteristics of Bi and Fe co-doped BaTiO3 ceramics

Gouadria, Hamida; Smari, M.; Mnasri, Taoufik; Necib, Jallouli; López-Sánchez, Jesús; Marı́n, P.; Jamale, Atul P.; Younès, Rached Ben

doi:10.1016/j.inoche.2022.110241

Cited by 11 publications

(2 citation statements)

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“…The structural, electrical, and magnetic properties of Fe- and Co-doped BTO were reported in refs − . McCracken and co-workers have investigated Fe and Co transition-metal-doped BTO and their effects on the major properties of BTO .…”

Section: Introductionmentioning

confidence: 99%

Functionality and Activity of Sol–Gel-Prepared Co and Fe co-Doped Lead-Free BTO for Thermo-Optical Applications

et al. 2023

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The BTO, BFTC, and BCTF compounds were synthesized by the sol–gel method. The XRD study revealed the formation of single-phase tetragonal perovskite structures with the space group (P4mm). The crystalline parameters were studied as a function of Fe and Co contents and occupation of Ba and/or Ti sites by Fe and Co in the BTO lattice. It was found that the obtained strain increases when Ba2+ is substituted by Co2+ and Ti4+ by Fe3+. The Raman investigation confirmed the existence of three active modes (B1/E (TO1LO), (E (TO)/A1(TO3), and (A 1(LO)/E (TO), all of which are related to the existence of the tetragonal phase and strongly support the XRD results. The microstructural study showed a clear correlation between the presence of Fe and Co and the grain size distribution. Optical studies revealed the improvement in band gap energy with transition-metal (Fe and Co) co-doped BTO ceramics. The decrease in the band gap is explained by the competing effects of Columbian interactions, microdeformation, and oxygen defects. The results indicate that the presence of Fe and Co dopants enhances the absorption in the BTO ceramic. The dopants demonstrated an effect on thermal conductivity: they decreased the thermal conductivity of BTO, which is in the range of 0.76–2.23 W m–1 K–1 at room temperature and 2.02–0.27 W m–1 K–1 at elevated temperatures. The microstructure of the manufactured materials and the grain size distribution affect the compressive strength.

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Section: Introductionmentioning

confidence: 99%

Functionality and Activity of Sol–Gel-Prepared Co and Fe co-Doped Lead-Free BTO for Thermo-Optical Applications

et al. 2023

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“…Comparable observations have been reported for specific dopants within the Barium Titanate (BTO) system. 43,59 The increase in size can be attributed to the formation of larger-sized grains with the increase in Pb content. Notably, the average grain size surpasses the crystallite size, indicating that each observed grain size in SEM consists of numerous nanoparticle domains.…”

Section: Examination Of Charge Density Through Structural Factors In ...mentioning

confidence: 99%

Study on the Structure, Morphology, Dielectric, and Piezoelectric Properties of Large-Grain (Ba_0.85Sr_0.15)_1–xPb_xTiO₃ Ceramic System for 0.02 ≤ x ≤ 0.08

Mesrar,

Elbasset

et al. 2024

ACS Omega

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Ba 0.85 Sr 0.15 ) 1−x Pb x TiO 3 ), along with various compositions (x(mol %) = 0, 2, 4, and 8), was synthesized through the conventional sol−gel reaction method. Following this, the resultant powders underwent a carefully controlled calcination process at 1000 °C for a period of 4 h. The examination of the crystalline phase of the calcined ceramics was conducted at room temperature using X-ray diffraction. Rietveld refinement of the XRD data, performed using FullProf, revealed that the samples exhibited a tetragonal structure within the space group P4mm. The impact of Pb doping on the lattice structure of BaSr 1−x TiO 3 was explored by analyzing the charge density distribution. The FTIR analysis unveiled a distinct absorptive band within the 450−600 cm −1 range, indicative of the stretching and bending vibrations associated with TiO 6 octahedra. Notably, sintering the material at 1150 °C for 4 h resulted in improved densification, as observed in scanning electron microscopy images showcasing a nearly uniform distribution of densely packed grains. Through the utilization of Williamson−Hall plots derived from XRD data, the average particle diameter was estimated to fall within the range of 131.87−141 nm, with an associated uncertainty ranging from 5 to 10%. Additionally, the dielectric characteristics unveiled the presence of a negative dielectric constant (ε r ) spanning the frequency range from 1 kHz to 2 MHz. The (Ba 0.85 Sr 0.15 ) 1−x Pb x TiO 3 ceramic displayed a widespread occurrence of negative permittivity, emphasizing the influence of dielectric resonance. The investigation revealed that the sintered ceramic with the formula (Ba 0.85 Sr 0.15 ) 1−x Pb x TiO 3 exhibited exceptional piezoelectric properties, achieving the highest piezoelectric constant (d 33 = 137 pC/N) and electromechanical coupling factor (k p = 0.49).

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Correlations between structural, dielectric properties, and ab initio calculations in Co-doped ZnO nanoparticles: effect of Co concentration

Saadi,

Khaldi,

Larbi

et al. 2023

Appl. Phys. A

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Implementing a sol-gel route to adjust the structural and dielectric characteristics of Bi and Fe co-doped BaTiO3 ceramics

Cited by 11 publications

References 81 publications

Functionality and Activity of Sol–Gel-Prepared Co and Fe co-Doped Lead-Free BTO for Thermo-Optical Applications

Functionality and Activity of Sol–Gel-Prepared Co and Fe co-Doped Lead-Free BTO for Thermo-Optical Applications

Study on the Structure, Morphology, Dielectric, and Piezoelectric Properties of Large-Grain (Ba_0.85Sr_0.15)_1–xPb_xTiO₃ Ceramic System for 0.02 ≤ x ≤ 0.08

Correlations between structural, dielectric properties, and ab initio calculations in Co-doped ZnO nanoparticles: effect of Co concentration

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Implementing a sol-gel route to adjust the structural and dielectric characteristics of Bi and Fe co-doped BaTiO3 ceramics

Cited by 11 publications

References 81 publications

Functionality and Activity of Sol–Gel-Prepared Co and Fe co-Doped Lead-Free BTO for Thermo-Optical Applications

Functionality and Activity of Sol–Gel-Prepared Co and Fe co-Doped Lead-Free BTO for Thermo-Optical Applications

Study on the Structure, Morphology, Dielectric, and Piezoelectric Properties of Large-Grain (Ba0.85Sr0.15)1–xPbxTiO3 Ceramic System for 0.02 ≤ x ≤ 0.08

Correlations between structural, dielectric properties, and ab initio calculations in Co-doped ZnO nanoparticles: effect of Co concentration

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Study on the Structure, Morphology, Dielectric, and Piezoelectric Properties of Large-Grain (Ba_0.85Sr_0.15)_1–xPb_xTiO₃ Ceramic System for 0.02 ≤ x ≤ 0.08