Development and excitation performance of lead free electronic material: Eu and Fe doped Bi0.5Na0.5TiO3 for filter application

Hajra, Sugato; Tripathy, A.; Panigrahi, Basanta K.; Choudhary, R. N. P.

doi:10.1088/2053-1591/ab149b

Cited by 34 publications

(15 citation statements)

References 28 publications

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“…where other symbols have their same meanings determines the activation energy (E a ) values. In this plot, in various temperature regions various slopes for each frequency depicting multiple activation energies [40]. From the Arrhenius plot, in different selected frequency range the conduction mechanism is seen and the corresponding E a value is 0.083, 0.060, 0.040, 0.035 eV for 1, 10, 100, 500 kHz respectively.…”

Section: Resultsmentioning

confidence: 93%

Dielectric, conductivity and ferroelectric properties of lead-free electronic ceramic:0.6Bi(Fe0.98Ga0.02)O3-0.4BaTiO3

Hajra

Sahu

Purohit

et al. 2019

Heliyon

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This paper presents the fabrication of a polycrystalline sample of the above electronic system by a mixed-oxide technique. The X-ray diffraction pattern show the evolution of perovskite phase (including some impurity phase). The rhombohedral symmetry and crystallite size of 42 nm were also found from the XRD. The distribution of grains in the microstructure suggests the formation of high density ceramics. The role of grains, grain boundaries and interface on resistive (impedance, electrical modulus and electrical transport) and insulating (dielectric) has been investigated over a wide range of frequencies (10 3 –10 6 Hz) and temperatures (25–400 °C) using spectroscopy (dielectric, modulus and impedance) techniques. The Nyquist plot illustrates the presence of effects such as grain and grain boundary over selected temperatures. Analysis of conductivity spectra reveals that the electrical transport process of the material is influenced by charge transfer by hopping. The complex modulus spectrum also describes the dielectric relaxation of the material. The study of field dependent polarization reveals the existence of ferroelectricity in the material.

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Section: Resultsmentioning

confidence: 93%

Dielectric, conductivity and ferroelectric properties of lead-free electronic ceramic:0.6Bi(Fe0.98Ga0.02)O3-0.4BaTiO3

Hajra

Sahu

Purohit

et al. 2019

Heliyon

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“…There are grains and grain boundaries inside the samples, which have different electrical properties. [45] In the low-frequency region, the grain boundaries with poor conductivity are dominant, and the resulting high resistance allows electrons to accumulate at the grain boundaries to produce greater polarization, hence giving the high dielectric constant. While in the high-frequency region, the grains with small resistance dominate, which hinders the movement of electrons and leads to the reduced dielectric constants.…”

Section: Dielectric and Piezoelectric Properties Of (Btma) 2 Cobr 4 Devicesmentioning

confidence: 99%

A New Hybrid Lead‐Free Metal Halide Piezoelectric for Energy Harvesting and Human Motion Sensing

Guo

Gong

et al. 2021

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voltage power sources, and energy harvesting systems. [1][2][3][4][5][6][7] The commercially available piezoelectrics are dominated by conventional ceramics (i.e., lead zirconate titanate, PZT) and polymers (i.e., polyvinylidene difluoride, PVDF). For the former, they often require harsh synthetic conditions and contain toxic heavy metals; while for the later, their piezoelectric performance still needs further improvement. In this regard, developing new kind of piezoelectric materials to overcome these drawbacks is highly thought after. Recently, hybrid organicinorganic piezoelectric materials have attracted extensive attention due to their great structural tunability, mild synthesis conditions, mechanical flexibility, low dielectric constants, and attractive piezoelectric performance. [8][9][10] For instance, an extremely high d 33 of about 1540 pC N −1 was realized in a molecular perovskite solid solution (TMFM) x (TMCM) 1− x -CdCl 3 (TMFM = trimethylfluoromethyl ammonium, TMCM = trimethylchloromethyl ammonium). [11] A following study shows that a 2D perovskite (ATHP) 2 PbBr 4 [12] (ATHP, 4-aminotetrahydropyran) can exhibit a g 33 as large as 660.3 × 10 −3 V m N −1 . These values are even much higher than those of many commercial piezoelectric materials, such as PZT-5H [13] (d 33 = 593 pC N −1 ) and PVDF (g 33 = 286.7 × 10 −3 V m N −1 ). Many of these hybrid piezoelectric materials, however, have the perovskite-type structures which mean that their organic amines (A-site), metal cations (B-site), and halides (X-sites) are limited by the tolerance factors. On the other hand, these hybrid compounds often contain lead or other toxic metals, [10] which inevitably restricting their future applications in eco-friendly environments. Hence, it is of great significance to explore lead-free molecular piezoelectric systems. Some important progresses have been recently made in synthesizing hybrid lead-free organic-inorganic perovskites, and typical examples are TMCM-MnCl 3 (d 33 = 185 pC N −1 , Mn = Manganese), [14] (RM3HQ) 2 RbLa(NO 3 )

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“…For both sintered and quenched samples, depressed semicircle (i.e., non-Debye-type response) suggests a new circuit model is needed to fit it. The occurrence of asymmetric semi-circle shows non-Debye type of relaxation in both the sintered and quenched samples [16,17]. The circuit model used for fitting the impedance data of sintered and quenched sample is RQC.…”

Section: Complex Impedance Analysis and Nyquist Plotmentioning

confidence: 99%

Dielectric and impedance spectroscopy of aluminium oxide substituted fused silica samples

et al. 2019

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This paper shows a comparative study of sintered and thermally quenched Al 2 O 3 substituted fused silica ceramics processed by colloidal suspension route. The structural analysis is performed using X-ray diffraction measurements. The natural surface micrographs present close packing of non-uniform shape of grains. The high permittivity and low loss are illustrated from frequency dependent permittivity. The impedance spectroscopy shows non-Debye type relaxation mechanism. The Nyquist plot shows the presence of only grain effect. The overlapping large Polaron tunnelling model is attributed from the conduction studies of both sintered and quenched samples.

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Development and excitation performance of lead free electronic material: Eu and Fe doped Bi_0.5Na_0.5TiO₃ for filter application

Cited by 34 publications

References 28 publications

Dielectric, conductivity and ferroelectric properties of lead-free electronic ceramic:0.6Bi(Fe0.98Ga0.02)O3-0.4BaTiO3

Dielectric, conductivity and ferroelectric properties of lead-free electronic ceramic:0.6Bi(Fe0.98Ga0.02)O3-0.4BaTiO3

A New Hybrid Lead‐Free Metal Halide Piezoelectric for Energy Harvesting and Human Motion Sensing

Dielectric and impedance spectroscopy of aluminium oxide substituted fused silica samples

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