Abstract
The effect of cadmium substitution and sintering temperature on the microstructure and dielectric properties of nano ZnCd x Fe 2-x O 4 ferrites (x=0.0, 0.05, 0.1, 0.2, 0.3 and 0.5) has been investigated and prepared by egg-white technique. Electrical conductivity and dielectric measurements have been analysed in the frequency range from 100 Hz to 10 MHz. The variation of the real (ε′) and imaginary (ε″) part of dielectric constant, AC conductivity (σ AC ) and loss tangent ( tan δ) with frequency has been studied. It follows the Maxwell–Wagner model based on the interfacial polarization in consonance with the Koop's phenomenological theory. It is found that the permittivity of ZnCd x Fe 2-x O 4 ferrites improved and shows a maximum value (~9 × 103) at 100 Hz for the x=0.1 sample.
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