Research Article Open Access

Electrical Properties of Cobalt Oxide/Silica Nanocomposites Obtained by Sol-Gel Technique

Gomaa A.M. Ali1, Osama A. Fouad2 and Salah A. Makhlouf3
  • 1 Al-Azhar University, Egypt
  • 2 Central Metallurgical Research and Development Institute, Egypt
  • 3 Al Imam Mohammad Ibn Saud Islamic University (IMSIU), Saudi Arabia
American Journal of Engineering and Applied Sciences
Volume 9 No. 1, 2016, 12-16

DOI: https://doi.org/10.3844/ajeassp.2016.12.16

Submitted On: 17 October 2015 Published On: 18 November 2015

How to Cite: Ali, G. A., Fouad, O. A. & Makhlouf, S. A. (2016). Electrical Properties of Cobalt Oxide/Silica Nanocomposites Obtained by Sol-Gel Technique. American Journal of Engineering and Applied Sciences, 9(1), 12-16. https://doi.org/10.3844/ajeassp.2016.12.16

Abstract

This work is an extension of our previous studies on cobalt oxide nanoparticles impeded in a silica matrix. Here we study the preparation and characterization of high cobalt content materials (60-90 wt%). In addition, the DC electrical conductivity of the prepared materials in a wide temperature range (350-673 K) was measured and discussed. The activation energy has been obtained according to Mott’s Small-Polaron Hopping (SPH) and Mott’s and Greaves Variable Range Hopping (VRH) models.

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Keywords

  • Sol-Gel
  • Cobalt Oxide/Silica
  • Nanocomposites
  • Electrical Conductivity