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IJPAP Vol.47(03) [March 2009] >

Title: Structural and dielectric behaviour of barium substituted lead zinc niobate
Authors: Himanshu, A K
Gupta, D C
Dutta, Alo
Sinha, T P
Bandyopadhayay, S K
Issue Date: 2009
Publisher: CSIR
Abstract: The polycrystalline samples of (Pb1xBax)(Zn1/3Nb2/3)O3 (PBZN) ceramics have been synthesized by the columbite precursor method. X-ray diffraction analysis of PBZN synthesized for x = 0.15, 0.25, 0.35 and 0.50 shows a cubic perovskite phase at room temperature. The changes in the structures are observed with increasing Ba contents in PBZN. The dielectric dispersion of the solid solutions has been studied as a function of temperature in the frequency range 100 Hz-1MHz. The temperature variation of the real components (ƐƐ) at different frequencies of the dielectric permittivity shows a broad maximum. The diffuse peaks in  versus T confirm the relaxor behaviour of PBZN. The changes in the relaxor properties of the compounds are found to be compositional dependent. The frequency dependence of Tm in these compounds with barium substitution is modeled using Vogel-Fulcher relation.
Page(s): 212-219
ISSN: 0019-5596
Source:IJPAP Vol.47(03) [March 2009]

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