Improvement in electric and dielectric properties of nanoferrite synthesized via reverse micelle technique

摘要

Nano nickel zinc ferrite (Ni_(0.58)Zn_(0.42)Fe_2O_4) with fascinating dielectric properties which reveal a direction for application was synthesized by reverse micelle technique. Dielectric constant and dielectric losses are controlled up to a measurement temperature of around 473 K at higher frequency range of 9-19 MHz. The dielectric loss of the sample investigated at room temperature is only 0.003 at 19 MHz. The presently studied nanoferrite also exhibits a high value of dc resistivity, 10~8 Ω cm. High resistivity and low dielectric constant and loss can be corelated to small grain size and better compositional stoichiometry obtained as a result of processing via reverse micelle technique at low sintering temperature (773 K).