Electrical properties of Na2Pb2R2W2Ti4V4O30 (R = Dy, Pr) ceramics

Piyush R. DAS; B. N. PARIDA; R. PADHEE; R. N. P. CHOUDHARY

doi:10.1007/s40145-013-0048-y

Journal of Advanced Ceramics 2013, 2(2): 112-118 https://doi.org/10.1007/s40145-013-0048-y

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Open Access | Issue | Published: 04 June 2013

Electrical properties of Na₂Pb₂R₂W₂Ti₄V₄O₃₀ (R = Dy, Pr) ceramics

Show Author's Information Hide Author's Information Piyush R. DAS^{^*}(

), B. N. PARIDA, R. PADHEE, R. N. P. CHOUDHARY

Department of Physics, Institute of Technical Education & Research, Siksha ‘O’ Anusandahan University, Khandagiri, Bhubaneswar 751030, Odisha, India

Keywords:

ceramics, impedance spectroscopy, electrical properties, ferroelectricity, microstructure

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DAS PR, PARIDA BN, PADHEE R, et al. Electrical properties of Na₂Pb₂R₂W₂Ti₄V₄O₃₀ (R = Dy, Pr) ceramics. Journal of Advanced Ceramics, 2013, 2(2): 112-118. https://doi.org/10.1007/s40145-013-0048-y

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Abstract

The polycrystalline samples of complex tungsten bronze (TB) Na₂Pb₂R₂W₂Ti₄V₄O₃₀ (R=Dy, Pr) compounds were prepared by solid-state reaction technique. Room- temperature preliminary structural studies confirm the formation of the compounds in the orthorhombic crystal system. Detailed studies of electrical properties of the materials using complex impedance spectroscopy technique exhibit that the impedance and related parameters are strongly dependent upon temperature and microstructure (bulk, grain boundary, etc). An observation of negative temperature coefficient of resistance (NTCR) suggests the materials have semiconducting properties. The variation of AC conductivity with temperature shows a typical Arrhenius behavior of the materials. Both the samples obey Jonscher’s universal power law. The existence of hopping mechanism in the electrical transport processes in the system with non-exponential type of conductivity relaxation is confirmed by electrical modulus analysis.

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Electrical properties of Na₂Pb₂R₂W₂Ti₄V₄O₃₀ (R = Dy, Pr) ceramics

Show Author's information Hide Author's Information Piyush R. DAS^{^*}(

), B. N. PARIDA, R. PADHEE, R. N. P. CHOUDHARY

Department of Physics, Institute of Technical Education & Research, Siksha ‘O’ Anusandahan University, Khandagiri, Bhubaneswar 751030, Odisha, India

Abstract

Keywords: ceramics, impedance spectroscopy, electrical properties, ferroelectricity, microstructure

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Publication history

Received: 11 January 2013

Revised: 06 February 2013

Accepted: 16 February 2013

Published: 04 June 2013

Issue date: June 2013

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Open Access: This article is distributed under the terms of the Creative Commons Attribution Noncommercial License which permits any noncommercial use, distribution, and reproduction in any medium, provided the original author(s) and source are credited.