Synthesis and characterization of (Bi{sub 0.5}Ba{sub 0.5}) (Fe{sub 0.5}Ti{sub 0.5}) O{sub 3} ceramic

Journal Article · Thu Jan 15 00:00:00 EST 2015 · Materials Research Bulletin

DOI:https://doi.org/10.1016/J.MATERRESBULL.2014.10.062· OSTI ID:22420790

Padhee, R.; Suara, D.; Mishra, A.; Rout, J.; Choudhary, R. N.P. ^[1]

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1. Department of Physics, Multifunctional Materials Research Laboratory, Institute of Technical Education and Research, Siksha O Anusandahan University, Bhubaneswar 751030 (India)

Graphical abstract: Temperature variation of (a) dielectric constant (b) dielectric loss of the sample. - Highlights: • The high values of dielectric permittivity and low value of tangent loss. • It used for microwave applications. • The impedance and dielectric relaxation in the material is non exponential and non Debye-type. • Its ac conductivity obeys Jonscher universal power law. - Abstract: The polycrystalline sample of (Bi{sub 0.5}Ba{sub 0.5}) (Fe{sub 0.5}Ti{sub 0.5}) O{sub 3} (BF–BT) was prepared by a standard mixed oxide method. Analysis of room temperature XRD pattern and Raman/FTIR spectra of the compound does not exhibit any change in its crystal structure of BaTiO{sub 3} on addition of BiFeO{sub 3} in equal ratio. The surface morphology of the gold-plated sintered pellet sample recorded by SEM (scanning electron microscope) exhibits a uniform distribution of grains with less porosity. Detailed studies of nature and quantity of variation of dielectric constant, tangent loss, and polarization with temperature and frequency indicate the existence of ferroelectric phase transition at high-temperature. There is a low-temperature anti-ferromagnetic phase transition below 375 °C in the material. Detailed studies of electrical properties (impedance, modulus, etc.) of the material confirmed a strong correlation between micro-structure and properties.

• OSTI ID: 22420790
• Journal Information: Materials Research Bulletin, Vol. 61; Other Information: Copyright (c) 2014 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); ISSN 0025-5408
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BARIUM COMPOUNDS
BISMUTH COMPOUNDS
CERAMICS
CRYSTAL STRUCTURE
FERRITES
FERROELECTRIC MATERIALS
FOURIER TRANSFORMATION
IMPEDANCE
INFRARED SPECTRA
MICROSTRUCTURE
PERMITTIVITY
PHASE TRANSFORMATIONS
POLARIZATION
POLYCRYSTALS
RELAXATION LOSSES
SCANNING ELECTRON MICROSCOPY
TEMPERATURE DEPENDENCE
TITANATES
X-RAY DIFFRACTION