Processing, dielectric and impedance spectroscopy of lead free BaTiO3-BiFeO3-CaSnO3

Sahoo, Sushrisangita; Hajra, Sugato; De, Manojit; Mohanta, Kalyani; Choudhary, R. N. P.

doi:10.1016/j.jallcom.2018.06.284

Cited by 58 publications

(14 citation statements)

References 35 publications

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“…The full regional scan of Fe-2p (not shown here) predicts the occurrence of both Fe 2p 3/2 and Fe 2p 1/2 due to the well known spin-orbit interaction. The de-convolution analysis of Fe 2p 3/2 spectra were found to t well for two separate peaks [Figure 6 (g)] with an energy gap of 3.51 eV: one peak at 707.07 eV corresponds to the Fe 2+ and the other peak at 710.58 eV corresponds to Fe 3+ state [31,37]. The presence of Fe 2+ , Nb 4+ and Ti 3+ are basically because of the contributions of the OVs in the sample which is responsible for the transport mechanism.…”

Section: X-ray Photoelectron Spectroscopymentioning

confidence: 91%

Structural investigations, band gap narrowing and magnetic characteristics of multiferroic [Pb(Fe0.5Nb0.5)O3]0.4 - [(Ca0.2Sr0.8)TiO3]0.6

Padhee

Pati

Bhattacharjee

et al. 2022

Preprint

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We report a detailed and systematic investigation of the multifunctional properties of calcium strontium titanate [(Ca0.2Sr0.8)TiO3] substituted lead iron niobate [Pb(Fe0.5Nb0.5)O3] ceramic oxide manufactured by the effective high temperature solid state reaction method. Rietveld studies reveal the single phase formation of compound with a pseudocubic structure. The Williamson-Hall (W-H) analysis predicts the presence of tensile strain. Different molecular vibrations were detected using the Fourier transform infrared (FTIR) analysis. The local structures and optical modes were analyzed using Raman spectroscopy technique. The microstructural analysis had been done by field emission gun scanning electron microscope (FESEM). Energy dispersive X-ray spectroscopy (EDS) analysis was performed to check the purity. The detailed chemical structure and oxidation states were analyzed by incorporating the efficient X-ray photoelectron spectroscopy (XPS) technique. In addition to the valence identifications, the presence of oxygen vacancies was evident from the XPS analysis. The optical band gap and Urbach energy were analyzed by UV-Visible spectroscopy analysis. Effect of structural distortions, oxygen vacancies and electro-negativity on band gap were discussed. The photocatalytic response was studied by using Mulliken’s model. The electrical properties were analyzed in the frameworks of dielectric constant, tan δ, complex impedance spectroscopy and conductivity studies. The Jonscher’s law analysis revealed the presence of correlated barrier hopping (CBH) conduction mechanism. The binding energy (Wm), minimum hopping length (Rmin) and density of states near Fermi level (N(EF)) were analyzed. The ferroelectricity was studied by room temperature P-E loop. The magnetic study was performed by means of the room temperature M-H loop. The detailed magnetic structure of Fe nuclei was analyzed by incorporating the room temperature 57Fe Mössbauer spectroscopy.

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Section: X-ray Photoelectron Spectroscopymentioning

confidence: 91%

Structural investigations, band gap narrowing and magnetic characteristics of multiferroic [Pb(Fe0.5Nb0.5)O3]0.4 - [(Ca0.2Sr0.8)TiO3]0.6

Padhee

Pati

Bhattacharjee

et al. 2022

Preprint

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“…The improvement in ferroelectricity of BFO-BTO ceramic system is done through substitution of different ions, for example Co 3+ , Cu 2+ , Mn 2+ , La 2+ , Nd 3+ , Dy 3+ , Er 3+ , Eu 3+ , Cr 3+ , Ni 2+ , Al 3+ , Ce 2+ , Gd 3+ , and Ga 3+ [44][45][46][47][48][49][50][51][52][53]. The electrical properties are also improved in multiphase solution like BiMeO 3 (Me = Al, Ga, Y, Sc, Zn 1/2 Ti 1/2 , Mg 2/3 Nb 1/3 , Zn 2/3 Nb 1/3 ), La 0.7 Sr 0.3 MnO, Na 0.5 Bi 0.5 TiO 3 [32,[54][55][56][57][58].…”

Section: Bismuth Ferrite-barium Titanate (Bfo-bto)mentioning

confidence: 99%

“…Rhombohedral phases in BTO-BFO are thermally stable in comparison to pseudocubic or a mixture of rhombohedral and pseudocubic phases [59]. Substitution of ions like Na, Al, Bi 0.5 Na 0.5 TiO 3 , MnO 2 -CuO, and La(Mg 0.5 Ti 0.5 )O 3 is used to enhance the insulating properties as well as the thermal stability of BTO-BFO [57,[60][61][62][63]. Universal core-shell microstructures are also used to enhance thermal stability [64].…”

Section: Bismuth Ferrite-barium Titanate (Bfo-bto)mentioning

confidence: 99%

Lead-Free BiFeO3–BaTiO3 Ceramics: An Overview

Kumar

Dhillon

Panwar

et al. 2021

Engineering Materials

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Multiferroic materials based on BiFeO 3 show properties like ferroelectricity and ferromagnetism at the same time. Inclination towards materials that are environment friendly, overcomes the problems related to lead-based materials. BiFeO 3 -BaTiO 3 binary system entirely takes the charge over lead enrich materials. The binary system of BaTiO 3 and BiFeO 3 consists of lead-free materials having characteristic properties like high piezoelectric coefficient, high Curie temperature, and the existence of morphotropic phase boundary (MPB). The studies were carried on the BiFeO 3 -BaTiO 3 multiferroic system from the last decade. BiFeO 3 -BaTiO 3 system exhibits outstanding electrical applications in devices such as actuators, multilayer capacitors, flexible display, and memory devices. The present chapter discusses some basics of multiferroics, specially BiFeO 3 ceramic, misfortune related to BiFeO 3 and BiFeO 3 -BaTiO 3 binary systems are addressed.

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“…Thus, it is only necessary to change the ratio that solid solution of A and B to obtain an NTC thermistor having a corresponding function, which solves the problem that the stoichiometric ratio is difficult to control and the reproducibility is poor. Thus, most researchers use a solid solution approach to synthesize devices with specific performance …”

Section: Introductionmentioning

confidence: 99%

“…Thus, most researchers use a solid solution approach to synthesize devices with specific performance. 6,7 It is well known that (Ba Sr) TiO 3 has high dielectric constant, low dielectric loss, good thermal stability, and good high frequency characteristics. 8 Therefore, BST ferroelectric ceramics are considered to have the potential to replace silicon dioxide.…”

Section: Introductionmentioning

confidence: 99%

Correlation between B value deviation and sintering temperature of perovskite solid solution materials

et al. 2019

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The effects of different sintering temperatures on the system of Ba0.5Sr0.5TiO3–La0.8Ca0.2MnO3 (BST‐LCM) material were investigated by means of scanning electron microscopy, X‐ray, resistance‐temperature measurements, and X‐ray photoelectron spectroscopy. X‐ray diffraction and X‐ray photoelectron spectroscopy confirm that BST‐LCM is completely miscible and BST is the main phase, which under the premise of following the theory of small polaron conduction, titanium ions interact with manganese ions, which affects the electrical properties of the system of BST‐LCM material. For the electrical properties of related, the LCM content is inversely proportional to the activation energy. Through the linear fitting of the experimental data, the empirical formula between the sintering temperature B value and the content of solid solution is obtained, and the approximate B value within a certain range can be preliminarily calculated.

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Processing, dielectric and impedance spectroscopy of lead free BaTiO3-BiFeO3-CaSnO3

Cited by 58 publications

References 35 publications

Structural investigations, band gap narrowing and magnetic characteristics of multiferroic [Pb(Fe0.5Nb0.5)O3]0.4 - [(Ca0.2Sr0.8)TiO3]0.6

Structural investigations, band gap narrowing and magnetic characteristics of multiferroic [Pb(Fe0.5Nb0.5)O3]0.4 - [(Ca0.2Sr0.8)TiO3]0.6

Lead-Free BiFeO3–BaTiO3 Ceramics: An Overview

Correlation between B value deviation and sintering temperature of perovskite solid solution materials

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