Investigation on microstructure and electrical properties of Bi doping Ca3Co4O9 nanoparticles synthesized by sol-gel process

  • Authors

    • Mohammed M A
    • Izman Sudin
    • Alias Mohd Noor
    • Srithar Rajoo
    • Uday M B
    • Noor H. Obayes
    • Muhammad Firdaus Omar
    2018-05-22
    https://doi.org/10.14419/ijet.v7i2.29.13121
  • Thermolectric, Calcium cobalt oxide, Electrical resistivity, Sol–gel, starch, Combustion, Nano-particles.

  • In this study, nanoparticles of Bi doped Ca3-xCo4O9 [Ca3-xBixCo4O9 where x=0, 0.2, 0.4 and 0.6] were prepared by sol gel combustion method. The phase structures and microstructures of Bi doped Ca3-xCo4O9 powders preparation were investigated. The microstructural observations of different Bi doped Ca3-xCo4O9 powders were evaluated using X-ray diffraction analysis (XRD) and Variable Pressure Scanning Electron Microscope (VPSEM). The bulk Ca3-xBixCo4O9 samples were fabricated using uniaxial cold pressing technique. Electrical resistivity of bulk Ca3-xBixCo4O9 samples with different doping was measured using four-probe method from 300 to 700°K. The electrical resistivity was found to decrease with increasing temperature for the bulk Ca3-xBixCo4O9 samples. The electrical properties of Ca3-xBixCo4O9 are non-monotonic functions of x.

     

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    M A, M., Sudin, I., Mohd Noor, A., Rajoo, S., M B, U., H. Obayes, N., & Firdaus Omar, M. (2018). Investigation on microstructure and electrical properties of Bi doping Ca3Co4O9 nanoparticles synthesized by sol-gel process. International Journal of Engineering & Technology, 7(2.29), 31-33. https://doi.org/10.14419/ijet.v7i2.29.13121