Authors : Nahedh H. Alwash and Raheem abed Jeber
Abstract: The (co-precipitation) method is used to prepare two types of ferrite (CoCoFe2O4 , ZnCoFe2O4 ). Precursor materials (ZnCl2 CoCl2 .6H2O), mixed with iron chloride (FeCl3). The prepared powder of ferrites were primary sintered at 800°C for 2 h XRD technique were used to study the structure of two types ferrite prepare. Then using these types of ferrite to prepare finely synthesis (ZnxCo1-xFe2O4) ) with (x = 0.2, 0.4, 0.6, 0.8) to be 8 samples halve of these were pressed as pellets (12.3 mm diameter, 5-4 mm thickness) then later halve as triodes (Rin = 9.85 mm, Rout = 19.4 mm) by hydraulic press at pressure (3-5 tons), all of them were sintered at in out (1100°C) for 2 h. Bulks densities were measured, DC measurements were used to determine electrical resistivity (p), AC measurements real part and of dielectric constant, initial permeability (εr’, μ ) were calculated, the study r i is show that, the x increase lead to decrease the density. Electrical resistivity has minimum value for x = 0.4. Real part of dielectric constant decrease sharply with increasing frequency to reach 100 kHz then the decrease is reducing.
Nahedh H. Alwash and Raheem abed Jeber, 2018. The Effect of Zn+2 Substitution on Properties of the System (MxCo1-xFe2O4). Journal of Engineering and Applied Sciences, 13: 619-623.