Impedance, modulus and conductivity studies of Fe3+ doped BaTiO3 ceramics prepared by solid state method

Gouitaa, Najwa; Lamcharfi, T.; Bouayad, Mf.; Abdi, Farid; Hadi, Nasr

doi:10.1007/s10854-018-8666-3

Cited by 14 publications

(8 citation statements)

References 12 publications

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“…Figure 8 displays the Cole–Cole plots of the combined nanocomposite system of PPy/SiO 2 /FePS 3 at various temperatures, this relation was used to understand the microscopic elements of the material role, such as the grain, electrode effect, and relaxation process 70 …”

Section: Resultsmentioning

confidence: 99%

Investigating and characterizing electrical properties of polypyrrole/SiO₂/FePS₃ nanocomposite

Ahmed,

Fathi,

El‐Meligi

2024

Polymers for Advanced Techs

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Novel nanocomposites of polypyrrole (PPy) embedded in silica (SiO2) and iron phosphorus trisulphide (FePS3) nanoparticles have been fabricated. The nanocomposite's dielectric characteristics have been examined in relation to temperature ranges of 25–200°C and frequency ranges of 0.1–7 MHz. Fourier‐transform infrared spectroscopy (FTIR), x‐ray diffraction (XRD), scanning electron microscopy (SEM–EDX), transmission electron microscope (TEM), and dielectric measurements have all been used to evaluate the prepared nanocomposite. The monoclinic crystal structure of the prepared FePS3 and PPy/SiO2/FePS3 nanocomposite is confirmed by XRD, EDX, and TEM studies. The FePS3 is perfectly layered structure in the SEM image, and FePS3 and SiO2 particles are well intercalated, creating novel nanocomposites of two nanoparticle phases that served as a union network during the polymerization process. The IR spectrum shows that PPy is a dopant in the interlayer area of FePS3. The splitting major peak (570 cm−1) of FePS3 is visible at around 640 and 560 cm−1. The high AC conductivity values indicated that the combination of FePS3/SiO2 nano‐matrix contains PPy at high packing densities and confirming the semiconducting properties of the nanocomposite to be used in several electronic applications.

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Section: Resultsmentioning

confidence: 99%

Investigating and characterizing electrical properties of polypyrrole/SiO₂/FePS₃ nanocomposite

Ahmed,

Fathi,

El‐Meligi

2024

Polymers for Advanced Techs

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“…This increase of ε′ r with increasing Bi is also found by S. Islam et al [ 56 ], for Bi-substituted BaTiO 3 ceramics, but the values of ε′ r they obtained are larger than our values. This difference is caused by the substitution of BaTiO 3 by Fe in the Ti site which has the effect of decreasing ε′ r [ 37 ]. Moreover, it is noticed that the phase transition temperatures decrease with the Bi substitution ( Fig.…”

Section: Resultsmentioning

confidence: 99%

“…It is observed that when Fe substituted at B-site (Ti), it improves the coercive field while at A-site (Ba) substitution, the sample saturation magnetization increases [ 34 ]. Meanwhile, Fe-doped BaTiO 3 ceramics show some inconveniences that limit its application which are the low dielectric permittivity values and high dielectric phase transitions, which were confirmed by several works [ [35] , [36] , [37] ] On the other hand, the co-substitution of BaTiO 3 with Fe 3+ and Bi 3+ ceramics opens new possibilities to improve physical properties which could be compared with BFO-BT composites properties. The effect of BT co-substituted ceramics with Bi 3+ and Fe 3+ on structural, dielectric and ferroelectric properties were recently investigated in our works [ 38 , 39 ].…”

Section: Introductionmentioning

confidence: 86%

Investigation of relaxor and diffuse dielectric phase transitions of Ba1-XBixTi0.8Fe0·2O3 materials

Gouitaa

Ahjyaje

Lamcharfi

et al. 2023

Heliyon

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“…The feature of impedance spectra is almost similar at different temperatures. However all the curves showed a tendency to bend towards the abscissa to form semicircles with their centers on the real axis, having comparatively larger radius showing an ideal Debye type behavior 32,33 . The radius of curvature of the arcs decreases with increasing temperature, which reveals that the conductivity of the sample increases as temperature increases and indicate also a negative temperature coe cient of resistivity (NTCR) behavior of the test materials 34,35 According to the impedance spectrum data obtained of Ba 1 − x Bi x Ti 0.80 Fe 0.20 O 3 ceramics at x = 0.00, 0.05, 0.10 and 0.15 at 400 °C of measurement temperature (Fig.…”

Section: Electric Propertiesmentioning

confidence: 98%

Rietveld refinement and diffuse phases transition of Ba1-XBixTi0.8Fe0.2O3 ceramics at x=0.00, 0.05, 0.10 and 0.15 prepared by solid state method.

Gouitaa

Taj-dine

BOUAYAD

et al. 2020

Preprint

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The effect of substitution of Baryum by Bismut in site A and titanium by iron in site A on structural, physical and electrical properties of Ba1-xBixTi0.80Fe0.20O3 ceramics at (x=0.00, 0.05, 0.10 and 0.15) was investigated by X-ray diffraction, Scaning Electron Microscopy (SEM) as well as dielectric characterizations. The crystal phase was studied by using rietveld refinement. The result of rietveld refinement of X-ray powders diffraction of Ba1-xBixTi0.80Fe0.20O3 shows that these compounds crystallize in tetragonal (P4mm) and hexagonal (P63mmc) for x=0.00 and 0.05 while at x=0.10 and 0.15 the hexagonal phase disappears and the tetragonal phase is stabilized. The structural parameters and the R-factors of these ceramics were succefully determined by the rietveld refinement. The Raman spectra confirms the disappearance of hexagonal phase in benefit of tetragonal phase as the Bi substitution increases. The dielectric measurements as function of temperature are studied and showed tree diffuse phase transitions transition from the ferroelectric rhombohedral phase to the ferroelectric orthorhombic TR-O phase and the second one is from the ferroelectric orthorhombic phase to the ferroelectric TO-T tetragonal phase. While the third one at high temperatures is the phase transition from the ferroelectric tetragonal phase to the paraelectric cubic phase Tm. These phases transition were displaced to the lower temperature with increasing of Bi substitution. And the value of dielectric permittivity increases gradually with increasing of Bi2+ contents. All these phase transitions showed a diffused phenomenon which can be well described by fitting the modified Ushino relation, 1/ε’r = 1/ε’r,max [ 1+ ((T-Tm)/2δ)γ]. The complex impedance Cole–Cole plots showed negative temperature coefficient of resistivity (NTCR) behavior of the Ba1-xBixTi0.80Fe0.20O3 for x=0.05 to 0.15 materials and decrease in grain and grain boundaries resistivity. The relaxation behavior in the test materials is found to be of Debye type.

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Impedance, modulus and conductivity studies of Fe3+ doped BaTiO3 ceramics prepared by solid state method

Cited by 14 publications

References 12 publications

Investigating and characterizing electrical properties of polypyrrole/SiO₂/FePS₃ nanocomposite

Investigating and characterizing electrical properties of polypyrrole/SiO₂/FePS₃ nanocomposite

Investigation of relaxor and diffuse dielectric phase transitions of Ba1-XBixTi0.8Fe0·2O3 materials

Rietveld refinement and diffuse phases transition of Ba1-XBixTi0.8Fe0.2O3 ceramics at x=0.00, 0.05, 0.10 and 0.15 prepared by solid state method.

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Impedance, modulus and conductivity studies of Fe3+ doped BaTiO3 ceramics prepared by solid state method

Cited by 14 publications

References 12 publications

Investigating and characterizing electrical properties of polypyrrole/SiO2/FePS3 nanocomposite

Investigating and characterizing electrical properties of polypyrrole/SiO2/FePS3 nanocomposite

Investigation of relaxor and diffuse dielectric phase transitions of Ba1-XBixTi0.8Fe0·2O3 materials

Rietveld refinement and diffuse phases transition of Ba1-XBixTi0.8Fe0.2O3 ceramics at x=0.00, 0.05, 0.10 and 0.15 prepared by solid state method.

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Investigating and characterizing electrical properties of polypyrrole/SiO₂/FePS₃ nanocomposite

Investigating and characterizing electrical properties of polypyrrole/SiO₂/FePS₃ nanocomposite