Structural and electrical properties of La modified Bi5Ti3FeO15 ceramics

Mohapatra, Aparajita; Das, Piyush R.; Choudhary, R. N. P.

doi:10.1007/s10854-015-2794-9

Cited by 8 publications

(3 citation statements)

References 47 publications

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“…This behavior is due to the different types of polarization (i.e. dipolar, ionic, electronic, and interfacial) and the accumulation of charge carriers on the surface and at grain boundaries, known as the Maxwell-Wagner effect 5,19 . Therefore, we focus on the dielectric properties of samples at higher frequencies since it properly exhibits the intrinsic polarizability of samples.…”

Section: The Refined Lattice Parameters and Cell Volume Of Single-phamentioning

confidence: 99%

Synthesis of Aurivillius Phase CaBi4Ti4O15 Doped with both La3+ and Mn3+ Cations: Crystal Structure and Dielectric Properties

et al. 2020

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The four-layer Aurivillius CaBi 4 Ti 4 O 15 with introducing of La 3+ on the A-site and Mn 3+ on the B-site with the formula Ca 1-x Bi 3+x LaTi 4-x Mn x O 15 (x = 0, 0.2, 0.4, 0.6, 0.8, and 1) were synthesized by molten salt method using the mixture of sulfate salts K 2 SO 4 /Na 2 SO 4 as the flux. XRD data confirmed the formation of single-phase Aurivillius with A2 1 am orthorhombic structure for x = 0, 0.2, 0.4, and 0.6, whereas for x = 0.8 and 1, the impurity phases were observed. SEM analysis shows the anisotropic plate-like grains, which are a typical grain of Aurivillius phases. The cell volume decreases with increasing x, indicating a presence of mixed valences of Mn 3+ and Mn 4+. The dielectric constants increased with x, strongly correlated with the higher distortion of the structure, since the 6s 2 lone pair electrons of Bi 3+ cation increase. The presence of Mn 3+ unpaired electrons results in the increase of dielectric loss as increasing x.

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Section: The Refined Lattice Parameters and Cell Volume Of Single-phamentioning

confidence: 99%

Synthesis of Aurivillius Phase CaBi4Ti4O15 Doped with both La3+ and Mn3+ Cations: Crystal Structure and Dielectric Properties

et al. 2020

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“…Figure 12 shows frequency variation of conductance (Y 0 ) for all prepared CTFO nanoperovskites at different temperatures. These are denoted as individual admittance of cumulative microstructure model with the help of series resistive and capacitive components, known as bricklayer model [61]. It is clearly observed that the space charges are to be released from the surface electrodes at higher frequencies.…”

Section: Complex Impedance Spectroscopy Analysismentioning

confidence: 99%

Effect of temperature on the electrical properties of nanocrystalline CaTi1−x Fe x O3−Δ perovskite

Mathu¹,

Nehru²,

Vinoth³

et al. 2015

J Mater Sci: Mater Electron

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Calcium titanate nanopowder doped with high content (1 M%) of iron was synthesized using simple sol-gel method. The four obtained samples were post-sintered at 100, 500, 900, and 1250°C to get soft agglomerates of nanocrystalline perovskites, which were deagglomerated by wet milling process using ethanol as a medium. The general stoichiometric formula for iron-doped CaTiO 3 was symbolized as CaTi 1-x Fe x O 3-d . The crystallographic structure of perovskites was found to be orthorhombic for all the four samples. The real and imaginary parts of the impedance values of sintered samples as a function of frequency were obtained using complex impedance spectroscopy. All the instrumental parameters were calibrated before initiating the measurements. The frequency range was set between 0.01 Hz and 1 MHz, and AC bias voltage was maintained at 50 mV. The objective of this work was to find the economical relevance of pioneering materials for electronic applications such as hydrogen production in fuel cells, solar plant, ferroelectric memory devices, microwave resonators, and sensible membranes as they are cheap and readily available, and can be prepared using controllable synthesis in a commercial laboratory.

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“…In view of the above, structural, dielectric, electrical and magnetic properties of a new multioferroic fabricated with ferroelectric Bi 4 Ti 3 O 12 (T c = 650°C) and BiFeO 3 in equal molecular ratio (i.e., Bi 5 Ti 3 FeO 15 ) have been reported [16][17][18][19][20][21][22][23][24]. Because of multiple advantages of addition of lanthanum in ferroelectrics or/and multiferroics, we have recently carried out extensive studies of structural, dielectrics and ferroelectric properties of La modified ferroelectric/multiferroics Bi 5 Ti 3 FeO 15 , and reported some of them [25,26]. In the present paper, we report the structural, dielectric, impedance, electric modulus and transport properties of Bi 3 La 2 Ti 3 FeO 15 (BLTFO).…”

Section: Introductionmentioning

confidence: 99%

Structural and electrical properties of Bi3La2Ti3FeO15 ceramics

Mohapatra

Das

Choudhary

2016

J Mater Sci: Mater Electron

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This research article reports structural and electrical (dielectric, impedance and conductivity) characteristics of La 3? modified Bi 5 Ti 3 FeO 15 multiferroic (i.e., Bi 3 La 2 Ti 3 FeO 15 ). Preliminary structural analysis of the prepared material using room temperature X-ray diffraction (XRD) data confirmed the formation of a single-phase compound in the orthorhombic crystal. The nature of scanning electron micrograph of the compound showed the uniform distribution of grains on the sample surface with less voids (high density) Detailed studies of dielectric, impedance and conduction characteristics of the material, carried out in a wide frequency range (100 Hz-1000 kHz) at different temperatures (room temperature to 500°C) using a complex impedance spectroscopy technique, have provided vital information on dielectric relaxation, conduction mechanism and role of grains, grain boundary and interface in understanding of structure-property relationship of the material.

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Structural and electrical properties of La modified Bi5Ti3FeO15 ceramics

Cited by 8 publications

References 47 publications

Synthesis of Aurivillius Phase CaBi4Ti4O15 Doped with both La3+ and Mn3+ Cations: Crystal Structure and Dielectric Properties

Synthesis of Aurivillius Phase CaBi4Ti4O15 Doped with both La3+ and Mn3+ Cations: Crystal Structure and Dielectric Properties

Effect of temperature on the electrical properties of nanocrystalline CaTi1−x Fe x O3−Δ perovskite

Structural and electrical properties of Bi3La2Ti3FeO15 ceramics

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