@article {10.3844/ajeassp.2016.12.16, article_type = {journal}, title = {Electrical Properties of Cobalt Oxide/Silica Nanocomposites Obtained by Sol-Gel Technique}, author = {Ali, Gomaa A.M. and Fouad, Osama A. and Makhlouf, Salah A.}, volume = {9}, number = {1}, year = {2015}, month = {Nov}, pages = {12-16}, doi = {10.3844/ajeassp.2016.12.16}, url = {https://thescipub.com/abstract/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.}, journal = {American Journal of Engineering and Applied Sciences}, publisher = {Science Publications} }