Synthesis, microstructure and dielectric properties of zirconium doped barium titanate

Journal Article · Mon May 23 00:00:00 EDT 2016 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.4947630· OSTI ID:22606242

Kumar, Rohtash ^[1]; Asokan, K. ^[2]; Patnaik, S. ^[3]; Birajdar, Balaji ^[1]

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1. Special Centre for Nano Sciences, Jawaharlal Nehru University, New Delhi (India)
2. Inter University Accelerator Centre, New Delhi (India)
3. School of Physical Sciences, Jawaharlal Nehru University, New Delhi (India)

We report on synthesis, microstructural and relaxor ferroelectric properties of Zirconium(Zr) doped Barium Titanate (BT) samples with general formula Ba(Ti{sub 1-x}Zr{sub x})O{sub 3} (x=0.20, 0.35). These lead-free ceramics were prepared by solid state reaction route. The phase transition behavior and temperature dependent dielectric properties and composition dependent ferroelectric properties were investigated. XRD analysis at room temperature confirms phase purity of the samples. SEM observations revealed retarded grain growth with increasing Zr mole fraction. Dielectric properties of BZT ceramics is influenced significantly by small addition of Zr mole fraction. With increasing Zr mole fraction, dielectric constant decreases while FWHM and frequency dispersion increases. Polarization vs electric field hysteresis measurements reveal ferroelectric relaxor phase at room temperature. The advantages of such substitution maneuvering towards optimizing ferroelectric properties of BaTiO{sub 3} are discussed.

• OSTI ID: 22606242
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 1731; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
BARIUM COMPOUNDS
CERAMICS
DOPED MATERIALS
ELECTRIC FIELDS
FERROELECTRIC MATERIALS
GRAIN GROWTH
IMPURITIES
MICROSTRUCTURE
PERMITTIVITY
PHASE TRANSFORMATIONS
POLARIZATION
SCANNING ELECTRON MICROSCOPY
SOLIDS
SYNTHESIS
TEMPERATURE DEPENDENCE
TEMPERATURE RANGE 0273-0400 K
TITANATES
X-RAY DIFFRACTION
ZIRCONIUM ADDITIONS