Synthesis ofβ-Phase (Bi2O3)1-x(Dy2O3)x(0.01

Author:

Yilmaz Serdar,Turkoglu Orhan,Belenli Ibrahim

Abstract

β-phase (Bi2O3)1-x(Dy2O3)xsystem with tetragonal structure is synthesized for0.01<x<0.10molar doping. Unit cell parameters increased with increasing the doping. We have studied the dependence of total electrical conductvity on temperature, doping concentration ofβ-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 ofβ-phase structure revealed regular increase in the form of an Arrhenius curve. The activation energies are calculated from these graphs.Bi2O3-basedDy2O3doped ceramics show ionic oxygen conductivity. The conductivity increased as the doping concentration increased. The highest value of conductivity is 0.006 0.006ohm-1cm-1(600C)for theβ-phase (Bi2O3)0.91(Dy2O3)0.09(800C). The sample with the highest conductivity is (Bi2O3)0.91(Dy2O3)0.09(800C)binary system where 1.450 ohm1cm1(745C).

Publisher

Hindawi Limited

Subject

General Materials Science

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