Ferroelectric Properties of <mml:math id="E1" xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msub><mml:mtext>Na</mml:mtext><mml:mtext mathvariant="bold">2</mml:mtext></mml:msub><mml:msub><mml:mtext>Pb</mml:mtext><mml:mtext mathvariant="bold">2</mml:mtext></mml:msub><mml:msub><mml:mtext>R</mml:mtext><mml:mtext mathvariant="bold">2</mml:mtext></mml:msub><mml:msub><mml:mtext>W</mml:mtext><mml:mtext mathvariant="bold">2</mml:mtext></mml:msub><mml:msub><mml:mtext>Ti</mml:mtext><mml:mtext mathvariant="bold">4</mml:mtext></mml:msub><mml:msub><mml:mtext>V</mml:mtext><mml:mtext mathvariant="bold">4</mml:mtext></mml:msub><mml:msub><mml:mtext>O</mml:mtext><mml:mrow><mml:mtext mathvariant="bold">30</mml:mtext></mml:mrow></mml:msub></mml:math>(R = Dy, Pr) Ceramics

Das, Piyush R.; Behera, Banarji; Choudhary, R. N. P.; Samantray, B. K.

doi:https://doi.org/10.1155/2007/91796

Advances in Materials Science and Engineering

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Research Letter | Open Access

Volume 2007 | Article ID 091796 | https://doi.org/10.1155/2007/91796

Ferroelectric Properties of Na2Pb2R2W2Ti4V4O30(R = Dy, Pr) Ceramics

Piyush R. Das,¹Banarji Behera,¹R. N. P. Choudhary,¹and B. K. Samantray¹

Academic Editor: Chun-Hway Hsueh

Received19 Jul 2007

Accepted12 Oct 2007

Published25 Nov 2007

Abstract

The polycrystalline samples of Na2Pb2R2W2Ti4V4O30 (R = Dy, Pr) were prepared by low-temperature, (i.e., at 650∘C) solid-state reaction technique. The preparation conditions have been optimized using thermogravimetry analysis (TGA) technique. X-ray diffraction (XRD) studies of the compounds showed the formation of a single-phase orthorhombic crystal structure at room temperature. Studies of dielectric properties (ɛr and tan δ) of the compounds at frequencies 10, 100, and 1000 kHz in a wide temperature range (room temperature–500∘C) exhibit ferroelectric phase transitions at 132∘C for NPDWTV and at 122∘C for NPPWTV of diffuse type. Ferroelectric properties of the materials are confirmed by polarization study.

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Copyright © 2007 Piyush R. Das et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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