الفهرس 
Study of the electrical properties and the microstructure of ZnO with different additives
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Abstract
Mixtures of ZnO doped with CuO, Cr₂O₃, Na₃Bi₂O₃ and NiO as additive were prepared by solid state reaction from the calcined oxides with the following proportions CuO(0.5, 1, 2, 4 and 6 mol%), Cr₂O₃ (0.5 mol%), Na₃Bi₂O₃(0. 5 mol%) and NiO (0.5 mol%). SEM and AFM revealed the presence of inter-granular phase. Additives present in grain boundaries between ZnO grains.XRD showed that no binary compound was formed. The conductivity and the dielectric constant are highly dependent on the microstructure of conducting grains surrounded by this insulating oxide barrier, and the observed non-linearity was ascribed to the corresponding potential barrier formed at the interface. The I-V characteristics show non- ohmic behavior and non-linearity