Synthesis of <mml:math id="E1" xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mi>β</mml:mi></mml:math>-Phase (Bi2O3)1-x (Dy2O3)x (0.01<mml:math id="E2" xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mo><</mml:mo><mml:mi>x</mml:mi><mml:mo><</mml:mo></mml:mrow></mml:math>0.10) System and Measurement of Oxygen Ionic Conductivity

Yilmaz, Serdar; Turkoglu, Orhan; Belenli, Ibrahim

doi:https://doi.org/10.1155/2007/97204

Advances in Materials Science and Engineering

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Volume 2007 | Article ID 097204 | https://doi.org/10.1155/2007/97204

Synthesis of β-Phase (Bi₂O₃)_1-x (Dy₂O₃)_x (0.01<x<0.10) System and Measurement of Oxygen Ionic Conductivity

Serdar Yilmaz,¹Orhan Turkoglu,²and Ibrahim Belenli³

Academic Editor: Robert S. Averback

Received06 Sept 2007

Accepted09 Dec 2007

Published02 Jan 2008

Abstract

β-phase (Bi₂O₃)_1-x (Dy₂O₃)_x system with tetragonal structure is synthesized for 0.01<x<0.10 molar doping. Unit cell parameters increased with increasing the doping. We have studied the dependence of total electrical conductvity on temperature, doping concentration of β-phase systems. The phase transition which manifests itself by the jump in the conductivity curve was also verified by DTA and both measurements are rather compatible. The electrical conductivity curves of β-phase structure revealed regular increase in the form of an Arrhenius curve. The activation energies are calculated from these graphs. Bi2O3-based Dy2O3 doped ceramics show ionic oxygen conductivity. The conductivity increased as the doping concentration increased. The highest value of conductivity is 0.006 0.006 ohm-1cm-1(600∘C) for the β-phase (Bi₂O₃)_0.91 (Dy₂O₃)_0.09(800∘C). The sample with the highest conductivity is (Bi₂O₃)_0.91 (Dy₂O₃)_0.09(800∘C) binary system where 1.450 ohm−1cm−1(745∘C).

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Copyright © 2007 Serdar Yilmaz 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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Advances in Materials Science and Engineering

Synthesis of β-Phase (Bi2O3)1-x (Dy2O3)x (0.01<x<0.10) System and Measurement of Oxygen Ionic Conductivity

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Synthesis of β-Phase (Bi₂O₃)_1-x (Dy₂O₃)_x (0.01<x<0.10) System and Measurement of Oxygen Ionic Conductivity