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The effects of Zn-doping on the dielectric behavior and electrical properties  of bulk α-Fe2O3 have been studied. X-ray diffraction analysis revealed the  presence of two phases in all samples: hematite and spinel ZnFe2O4, with the  amount of spinel phase increasing with increasing Zn content. Scanning  electron microscopy analysis combined with energy dispersive X-ray  spectroscopy showed that the Zn-bearing phase occurred in the form of  individual spinel ZnFe2O4 grains in a hematite matrix. DC conductivity was  measured in the temperature range 25-225oC (298-498 K). Impedance  spectroscopy measurements in the same temperature range were carried out in  the frequency range 100Hz to 10 MHz. Increase in the Zn content resulted in  increased electrical conductivity and higher values of the dielectric  constant. The resistance and capacitance of grains and grain boundaries were  analyzed by modeling the experimental results using an equivalent circuit.  [Projekat Ministarstva nauke Republike Srbije, br. III 45014

Study of dielectric behavior and electrical properties of hematite α-Fe2O3 doped with Zn