Investigations on the phase transition of Mn-doped BaTiO3 multifunctional ferroelectric ceramics through Raman, dielectric, and magnetic studies

Madhan, K.; Thiyagarajan, R.; Jagadeeshwaran, C.; Selvadurai, A. Paul Blessington; Pazhanivelu, V.; Aravinth, K.; Yang, Wenge; Murugaraj, R.

doi:10.1007/s10971-018-4835-3

Cited by 40 publications

(6 citation statements)

References 44 publications

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“…The measurements revealed that the temperatures of the samples are 617, 728, 906, and 1010 °C for the holding times of 12, 14, 16, and 20 min, respectively. After the calcination-obtained BT powders were codoped with holmium (III) Oxide (Ho 2 O 3 , Aldrich, purity > %99) and manganese (IV) Oxide (MnO 2 , Dae-Jung, purity > %99) through the following formula Ba 1−2x Ho 2x Ti 1−x Mn x O 3 (x = 0, 0.02, 0.04 and 0.06) [26,30], the powders were cold isostatic pressed (CIP) at 6.9 MPa. The bulk samples (B: x = 0, B 2 : x = 0.02, B 4 : x = 0.04, B 6 : x = 0.06) were conventionally sintered at 1100 °C for 3 h with a 10 °C min −1 heating rate.…”

Section: Methodsmentioning

confidence: 99%

“…Chitra and colleagues reported that the Ho element strongly affects the dielectric and piezoelectric properties of BT [3]. Madhan and coworkers indicated that the lattice constants, crystallite size, and lattice parameters ratio are increased due to Mn doping via the sol-gel process [26]. Liu et al found that the Ho cations lead to a homogeneous and dense structure [27].…”

Section: Introductionmentioning

confidence: 99%

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Ho-Mn co-doping in barium titanate piezoceramics via sol-gel process followed by microwave and conventional heating

et al. 2023

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Co-doped barium titanate (BT) piezoceramics are applied in advanced energy harvesting systems. In the present study, Ba1-2xHo2xTi1-xMnxO3 (x=0, 0.02, 0.04, and 0.06) were produced via the sol-gel-assisted solid state co-doping technique followed by microwave and conventional heating. In the current investigation, the synthesizing and phase characterization, allotropic transition, morphological examination, elemental analysis and dielectric-piezoelectric responses were investigated by X-Ray Diffraction (XRD), Differential Scanning Calorimetry (DSC) and Thermo-Gravimetric Analysis (TGA), Field-Emission Scanning Electron Microscope (FESEM), Energy-Dispersive x-ray Spectroscopy (EDS), Mapping analysis and inductance-Capacitance-Resistance meter (LCR meter) techniques, respectively. The XRD pattern and DSC/ TGA outcomes demonstrated that tetragonal BT phases without minor BaCO3 secondary phases are synthesized properly, and that the negligible unsolicited BaCO3 phases are thoroughly calcined by a microwave at 900℃. Doping resulted in an increase in tetragonality (c/a) of 0.19%, 0.15%, and 0.04%, respectively, compared to the pure calcined BT. Additionally, the crystallite size of BT decreased significantly by 59%, 58%, and 52%, respectively. The results revealed that the microwave-sintered samples have higher purity, drastic delicate and finer grain size distribution, and superior tetragonal-ity with respect to the conventionally sintered furnace samples. Furthermore, the piezoelectric constant for the microwave sintered and the conventionally sintered samples with the same value of x=0.04 were 390 and 370 (pC/N), respectively, which established that the sintering method has satisfactory affection (approximately 6%) on the piezo function of the samples. Eventually, the prepared samples which had 0, 2, 4, and 6 % moles of Ho3+-Mn2+ cations and were sintered by a microwave compared to the similar specimens fabricated by the furnace had superior dielectric constants of 2.6, 1.1, 2.2 and 2.9 times, respectively.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Ho-Mn co-doping in barium titanate piezoceramics via sol-gel process followed by microwave and conventional heating

et al. 2023

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“…In the pristine LaFeO 3 compounds for the origin of giant dielectric properties revealed by Idrees et.al, [40]. The dielectric constant of the prepared materials can be expressed as following equation, (3) D-is the thickness of disc sample, C p -is the capacitance, ε 0 is the permittivity, A is the cross-sectional area of disc sample [42]. The frequency dependence of ε' and tan δ of the prepared materials between 10 2 and 10 6 Hz measured in different temperatures and plotted in Figs.…”

Section: Dielectric Measurementmentioning

confidence: 99%

Conventional synthesis of perovskite structured LaTi_xFe_1-xO₃: A comprehensive evaluation on phase formation, opto-magnetic, and dielectric properties

Raji

Ramachandran

Muralidharan

et al. 2021

International Journal of Materials Research

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Perovskite structured LaTixFe1-xO3 (x = 0, 0.05, 0.15, 0.25) lanthanum ferrites were synthesized by conventional solid-state reaction. The structural Rietveld refinement and Raman analysis were conducted and confirmed that single-phase orthorhombic phase with Pbnm symmetry formed. The positions of the ions and their bonds of these ferrites were investigated. The spherical shaped morphology of these ferrites was examined. The quantitative chemical composition and distribution of these ferrites were confirmed. The excitonic absorption edge was observed at 590 nm; ascribed to the electronic transition from O2p→Fe3d and optical band gap values increased from 1.85– 2.02 eV as Ti concentration increased. The dielectric and magnetic behavior of these ferrites was studied. It is suggested that synthesized LaTixFe1xO3 powders with different properties could be tailored for different requirements.

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Section: Photoluminescence Studiesmentioning

confidence: 99%

Conventional synthesis of perovskite structured LaTixFe1-xO3: A comprehensive evaluation on phase formation, opto-magnetic, and dielectrical properties

Raji

Kurapati

Ramachandran

et al. 2020

Preprint

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In the current study, we report a comprehensive evaluation of the microstructures, optical, dielectric and magnetic traits of Ti-substituted perovskite structured lanthanum ferrite with chemical compositions LaTixFe1−xO3 (x = 0, 0.05, 0.15, 0.25). X-ray diffraction with Rietveld refinement and Raman analysis confirmed that both pure and Ti-substituted LaFeO3 maintained single-phase orthorhombic phase with Pbnm symmetry. Fourier transform infrared spectroscopy (FTIR) studies revealed the information about the positions of the ions and their bonds within the lattice structure of the LaFeO3. The spherical shaped morphology of all products was confirmed by SEM. The quantitative chemical composition and their distribution were confirmed by EDAX and mapping. The UV-Vis spectroscopic studies showed an excitonic absorption edge at 590 nm is ascribed to the electronic transition from O2p→Fe3d. Optical band gap (Eg) values were assessed by applying Tauc schemes, showed that Eg values are in a narrow range (1.85–2.02 eV). The dielectric properties such as, dielectric constant (ε’), dielectric loss (tan δ) was examined by varying with temperature and frequency. The magnetic results revealed weak ferromagnetic nature trait at 300 K. The variation in Ms (saturation magnetization), Hc (coercivity) and Mr (remanence) values were observed with increasing Ti substitution level.

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Investigations on the phase transition of Mn-doped BaTiO3 multifunctional ferroelectric ceramics through Raman, dielectric, and magnetic studies

Cited by 40 publications

References 44 publications

Ho-Mn co-doping in barium titanate piezoceramics via sol-gel process followed by microwave and conventional heating

Ho-Mn co-doping in barium titanate piezoceramics via sol-gel process followed by microwave and conventional heating

Conventional synthesis of perovskite structured LaTi_xFe_1-xO₃: A comprehensive evaluation on phase formation, opto-magnetic, and dielectric properties

Conventional synthesis of perovskite structured LaTixFe1-xO3: A comprehensive evaluation on phase formation, opto-magnetic, and dielectrical properties

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Investigations on the phase transition of Mn-doped BaTiO3 multifunctional ferroelectric ceramics through Raman, dielectric, and magnetic studies

Cited by 40 publications

References 44 publications

Ho-Mn co-doping in barium titanate piezoceramics via sol-gel process followed by microwave and conventional heating

Ho-Mn co-doping in barium titanate piezoceramics via sol-gel process followed by microwave and conventional heating

Conventional synthesis of perovskite structured LaTixFe1-xO3: A comprehensive evaluation on phase formation, opto-magnetic, and dielectric properties

Conventional synthesis of perovskite structured LaTixFe1-xO3: A comprehensive evaluation on phase formation, opto-magnetic, and dielectrical properties

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Conventional synthesis of perovskite structured LaTi_xFe_1-xO₃: A comprehensive evaluation on phase formation, opto-magnetic, and dielectric properties