Surface morphology and effect of particle sizes on the electrical conductivity of FeAl2O3 composite

Abstract

A composite sample of FeAl2O3were synthesized by using mixture of paraffin wax and a powder of Al2O3 (0.07gm.) with iron granular Fe (0.01 gm.) of different particle sizes (63μm, 73μm, 212μm and 300μm). Where paraffin wax was melted using a temperature source (heater) with 328 K, then the granular volume of composite FeAl2O3 powder was added to paraffin wax by manual mixing until the mixture was homogeneous and then deposited on slices of aluminum in laboratory conditions. The Characteristics of (current- voltage) were measured to various particle sizes. The electrical conductivity was estimated as a function of various temperature range. The conductivity values of this composite doped of FeAl2O3 increasing with temperature increases. Also, the activation energies Ea for the composite samples have been found (4.1x10-4 –2.9x10-4) eV. Beside that the mechanisms of electrical conductivity were studied and identified in support of Schottky and Frankel effect mechanisms.