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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 withincreasing the doping. We have studied the dependence of totalelectrical 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 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)

research letters in materials science

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

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