Electrical Properties of Cobalt Oxide/Silica Nanocomposites Obtained by Sol-Gel Technique
- 1 Al-Azhar University, Egypt
- 2 Central Metallurgical Research and Development Institute, Egypt
- 3 Al Imam Mohammad Ibn Saud Islamic University (IMSIU), Saudi Arabia
Copyright: © 2020 Gomaa A.M. Ali, Osama A. Fouad and Salah A. Makhlouf. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
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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- Cobalt Oxide/Silica
- Electrical Conductivity