Synthesis, Structural and Physical Properties of CuZn Fe O Ferrites
1680 1–x x2 4
4. Conclusions
A series of Cu1–xZnxFe2O4 ferrites have been synthesized.
The presence of Zn ions causes appreciable changes in
the structure and physical properties of the Zn-substituted
Cu-Zn ferrite. XRD results indicate the single phase of
pure cubic spinel structure. The lattice constant is found
to increase linearly with increasing Zn content in the
mixed Cu-Zn ferrite system obeying Vegard’s law due to
larger ionic radius of Zn2+ compared to Cu2+. X-ray den-
sity decrease with increasing Zn content as lattice con-
stant increase. A remarkable decrease in the value of
bulk density has been found with increasing Zn substitu-
tion Cu-Zn ferrite attaining 98% of theoretical density for
the sample x = 0.0. The porosity is found to increase for
the Zn substitution due to the creation of more cation
vacancies with the reduction of oxygen vacancies. With
the increase of Zn substitution, the grain sizes decreased.
The increases of initial permeability of CuZn ferrites
with Zn content were attributed to the decrease of mag-
netostriction constant.
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