Structural and Dielectric Properties of Strontium Hexaferrite Powder Synthesized in Presence of Crown Flowers Extract

Abstract

Strontium hexaferrite (SrFe₁₂O₁₉)powder was synthesized in presence of Calotropis Gigantea (crown) flowers extract. The stoichiometric proportion of strontium nitrate and ferric nitrate were added one by one in crown flowers extract and heated at 650º C for 6 hrs to obtain Strontium hexaferrite powder. Structural properties of calcined powder were investigated using FTIR and XRD analysis. FTIR study reveals the formation of ferrite phase. XRD analysis shows presence of M and α-Fe₂O₃ phases. The real and imaginary part of dielectric constant is measured at  room temperature between 20 Hz to 2 MHz frequency. The dielectric behaviour of prepared strontium hexaferrite powder is described using Maxwell-Wagner bilayer model and Koop’s theory.