Effect of Zn substitution on the electrical properties of Bi sub(2)Co sub(0.1)V sub(0.9)O sub(5.35) synthesized by sol-gel method

Samples of Bi sub(2)V sub(0.9)Co sub(0.1-x)Zn sub(x)O sub(5.35), 0.02 less than or equal to x less than or equal to 0.08 with layered Aurivillius structure were synthesized successfully by sol-gel citrate method. Structural and electrical characterization of compositions has been investigated by X-r...

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Bibliographic Details
Published in:Phase transitions 2015-05, Vol.88 (5), p.521-533
Main Authors: Salami, Nabil S, Beg, Saba
Format: Article
Language:English
Subjects:
Alternating current
Calorimetry
Concentration (composition)
Electrical properties
Grain boundaries
Impedance
Sol gel process
Zinc
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Summary:Samples of Bi sub(2)V sub(0.9)Co sub(0.1-x)Zn sub(x)O sub(5.35), 0.02 less than or equal to x less than or equal to 0.08 with layered Aurivillius structure were synthesized successfully by sol-gel citrate method. Structural and electrical characterization of compositions has been investigated by X-ray diffraction, thermogravimetric analysis-differential scanning calorimetric (TGA-DSC) analysis and AC impedance spectroscopy. The tetragonal gamma phase has been observed for all investigated samples. The AC impedance response of samples has been measured in the frequency range of 20 Hz to 1 MHz. The impedance for pellets decreases as thermal energy increases. The contribution of grain to the conduction process is more than that of grain boundary. The ionic conductivity and dielectric permittivity are found to be composition-dependent and increase with increasing Zn concentration. The maximum electrical conductivity observed for the composition x = 0.08 is sigma = 4.51 10 super(-4) S cm super(-1) at 300 degree C.
ISSN:0141-1594
1029-0338
DOI:10.1080/01411594.2014.996219