Electrical properties of pure and Li2O-doped CuO/Fe2O3 system precalcined at different temperatures

The electrical properties of purl and Li2O-doped CuO/Fe2O3 solids were inve stigated. Pure and Variously doped solids were subjected to thermal treatme nt at 1073-1273 K and the amount of dopant was varied between 0.84 to 3.36 mol%. The effect of precalcination temperature and amount of Li2O added on the electrical conductivity sigma, activation energy E-a and dielectric con stant epsilon* were studied. The Variation of epsilon ' and epsilon " as a function of frequency for pure and variously doped solids precalcined at di fferent temperatures was also investigated. The results obtained were discu ssed. (C) 2001 Elsevier Science B.V. All rights reserved.