TY  - JOUR
AU  - Ali, Gomaa A.M. 
AU  - Fouad, Osama A. 
AU  - Makhlouf, Salah A. 
PY  - 2015
TI  - Electrical Properties of Cobalt Oxide/Silica Nanocomposites Obtained by Sol-Gel Technique
JF  - American Journal of Engineering and Applied Sciences
VL  - 9
IS  - 1
DO  - 10.3844/ajeassp.2016.12.16
UR  - https://thescipub.com/abstract/ajeassp.2016.12.16
AB  - 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.