Influence of tin (IV) doping on structural and optical properties of rhombohedral barium titanate (BaTiO3)

Selvaraj, M.; Venkatesan, Ragavendran; Mayandi, J.

doi:10.1016/j.matpr.2019.05.302

Cited by 20 publications

(9 citation statements)

References 17 publications

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“…The smaller ionic size of Gd reduced the crystal lattice strain at doping concentration BSGT2 (x=0.4). However, with increasing doping concentration of Gd to x=0.6, the enlargement of crystal lattice occurs mainly due to the dominance of stoichiometric factor rather than ionic size factor [25].…”

Section: Structural Analysismentioning

confidence: 94%

Microwave-Assisted Synthesized Gadolinium Doped Barium Strontium Titanate Nanostructures: Structural and Optical Properties for DSSC Applications

Kavitha¹,

Ragavendran²,

Sethupathi³

et al. 2021

MNIJ

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Gadolinium (Gd) doped barium strontium titanate (BST) was prepared using the microwave-assisted solid-state reaction method for dye sensitized solar cell (DSSC) applications. The optical properties and the structural analysis of the prepared samples reveal the optical band gap and the morphology. The XRD pattern of the annealed samples confirms the polycrystalline nature with the cubic crystal structure. When the dopant is added, the bandgap increases slightly from 3.11 to 3.27 eV. The J-V characteristics of DSSCs prepared with pure and doped BST were investigated. The efficiency of the DSSCs remained constant and there is a slight increase in the Jsc for highly doped samples under 1-sun illumination. Gadolinium doped barium strontium titanate shows variation in the J-V characteristics and could be a potential candidate for the solar photovoltaic applications.

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Section: Structural Analysismentioning

confidence: 94%

Microwave-Assisted Synthesized Gadolinium Doped Barium Strontium Titanate Nanostructures: Structural and Optical Properties for DSSC Applications

Kavitha¹,

Ragavendran²,

Sethupathi³

et al. 2021

MNIJ

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“…e structural lattice parameters of barium titanate semiconductors doped with different materials and their corresponding bang gap employed for developing the proposed GSVR model are extracted from the literature [2][3][4][5][6][7][37][38][39][40]. Replacement of Ti 4+ ions in the parent barium titanate by the equivalent ions (say Sn 4+ ) from the dopants results in lower angle peak shifting with characteristic unit cell expansion due to ionic radii difference [41]. e expansion and contraction in the lattice parameters due to the octahedral coordination incorporation serves as the predictors to the developed model.…”

Section: Data Physical Description and Acquisitionmentioning

confidence: 99%

Barium Titanate Semiconductor Band Gap Characterization through Gravitationally Optimized Support Vector Regression and Extreme Learning Machine Computational Methods

Olatunji

Owolabi

2021

Mathematical Problems in Engineering

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Barium titanate (BaTiO3) is a class of ceramic multifunctional materials with unique thermal stability, prominent piezoelectricity constant, excellent dielectric constant, environmental friendliness, and excellent photocatalytic activities. These features have rendered barium titanate indispensable in many areas of applications such as electromechanical devices, thermistors, multilayer capacitors, and electrooptical devices. The photocatalytic activity of barium titanate semiconductor is hindered by its large band gap and high rate of charge recombination. Doping of the parent barium titanate compound for band gap tuning is challenging and consumes appreciable time and other valuable resources. This present work relates the influence of foreign material incorporation into the parent barium titanate with the corresponding energy band gap by developing extreme learning machine- (ELM-) based models and hybridization of support vector regression (SVR) with gravitational search algorithm (GSA) using the structural lattice distortion that emanated from doping as model descriptors. The developed gravitationally optimized SVR (GSVR) is characterized with a low value of mean absolute error (MAE), mean absolute percentage error (MAPE), and root mean square error (RMSE) of 0.036 ev, 1.145 ev, and 0.122 ev, respectively. The developed GSVR model outperforms ELM-Sine and ELM-Sig models using various performance evaluators. The developed GSVR model investigates the significance of iodine and samarium incorporation on the band gap of the parent barium titanate and the attained energy gaps conform excellently to the experimentally reported values. The demonstrated precision of the developed GSVR as measured from the closeness of its estimates with the measured values provides a quick and accurate method of energy gap characterization with circumvention of experimental stress and conservation of valuable time as well as other resources.

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“…(as ferromagnetic phases) in different combinations [9,[11][12][13]. BaTiO 3 (BT) possesses high permittivity, low dielectric loss and high tunability and it is widely used due to its specific ferroelectric and piezoelectric properties, [14,15]. At high temperatures, BT is stable in the paraelectric cubic phase and with decreasing temperatures phase transformation into ferroelectric phases occurs with tetragonal symmetry at T C−T = 120 °C, orthorhombic at T T −O = 5 °C and rhombohedral symmetry at −90 °C.…”

Section: Introductionmentioning

confidence: 99%

Magnetoelectric properties of materials based on barium zirconium titanate and various magnetic compounds

Dzunuzovic

Vijatovic-Petrovic

Bobić

et al. 2021

PAC

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Multiferroic composites containing ferroelectric Ba(Ti0.80Zr0.20)O3 (BT80Zr20) phase and magnetic Ni0.7Zn0.3Fe2O4 (NZF), CoFe2O4 (CF) or Ni0.7Cu0.01Sm0.05Zn0.29Fe1.95O4 (NCuSmZF) phase were investigated in this study. Three composites, BT80Zr20-NZF, BT80Zr20-CF and BT80Zr20-NCuSmZF were prepared by mixing chemically synthesized powders in the planetary mill, uniaxial pressing and sintering at 1300?C. X-ray diffraction data for the single phase and composites ceramics indicated the formation of crystallized structure of both ferrites and barium zirconium titanate, without the presence of undesirable phases. Microstructure analysis has shown the formation of two types of nanosized grains, polygonal ferromagnetic andd rounded ferroelectric grains. Non-saturated hysteresis loops were evident in all composite samples possibly due to the presence of very high conductive ferrite phases. The BT80Zr20-CF has shown the lowest conductivity values in comparison with other two compounds and therefore the highest potential for ferroelectric application. The impedance investigations confirmed the presence of different relaxation processes that originate from the grain and grain boundary contributions. Investigation of J-E relation between leakage and electric field for the BT80Zr20 and composites revealed the presence of four possible mechanisms of conduction in these materials.

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Influence of tin (IV) doping on structural and optical properties of rhombohedral barium titanate (BaTiO3)

Cited by 20 publications

References 17 publications

Microwave-Assisted Synthesized Gadolinium Doped Barium Strontium Titanate Nanostructures: Structural and Optical Properties for DSSC Applications

Microwave-Assisted Synthesized Gadolinium Doped Barium Strontium Titanate Nanostructures: Structural and Optical Properties for DSSC Applications

Barium Titanate Semiconductor Band Gap Characterization through Gravitationally Optimized Support Vector Regression and Extreme Learning Machine Computational Methods

Magnetoelectric properties of materials based on barium zirconium titanate and various magnetic compounds

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