Hyperfine, structural and electrical transport properties of the high-energy milled (1 − X).ZnO–X.FeO system

The system (1 − X).ZnO+X.FeO was high-energy ball-milled for 24 h and characterized by X-ray diffraction and Mossbauer spectroscopy. Sintered pellets were also prepared for X ≤ 0.07 by further thermal annealing pressed milled samples. These samples were also characterized regarding their I–V behavior. The results revealed the monophase formation of a (Zn1 − XFeX)O solid solution isomorphous to the zincite and a spinel-like phase of the Zn1 − YFe2 + YO4 type. The sintered samples showed I–V curves typical of poor varistor systems and the resistivity increasing with X.