Authors: Jumiah Hassan Farm Mooi Yen Mansor Hashim Zulkifly Abbas Zaidan Abdul Wahab W Mohd Daud W Yusoff Azmi Zakaria
Publish Date: 2007/06/26
Volume: 13, Issue: 4, Pages: 219-222
Abstract
NiFe2O4 prepared via the sol–gel technique were presintered at 900 °C and synthesized at different sintering temperatures from 1000 °C to 1200 °C at 100 °C intervals The samples were characterized for microwave dielectric properties These samples were measured using Agilent Impedance/Material Analyzer at frequencies 1 MHz to 18 GHz Results showed a decrease in the dielectric constant and loss factor with frequency except at the turning point around 150 MHz where the loss factor showed a gradual increase However both the dielectric constant and loss factor increase with increasing sintering temperature The grain size and density also increased with increasing sintering temperature but the porosity and grain boundary density showed a decrease
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