Dielectric permittivity of nickel ferrites at microwave frequencies 1 MHz to 1.8 GHz

Hassan, Jumiah and Farm, Mooi Yen and Hashim, Mansor and Abbas, Zulkifly and Abdul Wahab, Zaidan and Wan Yusof, Wan Mohamad Daud and Zakaria, Azmi (2007) Dielectric permittivity of nickel ferrites at microwave frequencies 1 MHz to 1.8 GHz. Ionics, 13 (4). pp. 219-222. ISSN 0947-7047

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Official URL: http://dx.doi.org/10.1007/s11581-007-0094-y

Abstract

NiFe2O4 prepared via the sol–gel technique were pre-sintered at 900 °C and synthesized at different sintering temperatures from 1,000 °C to 1,200 °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 1.8 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.

Item Type:Article
Keyword:Dielectric constant,Loss factor,Grain boundary, Porosity, Sintering, Dielectric permittivity, Nickel ferrites
Faculty or Institute:Faculty of Science
Publisher:Springer Berlin / Heidelberg
DOI Number:10.1007/s11581-007-0094-y
Altmetrics:http://www.altmetric.com/details.php?domain=psasir.upm.edu.my&doi=10.1007/s11581-007-0094-y
ID Code:7439
Deposited By: Najwani Amir Sariffudin
Deposited On:28 Jun 2010 03:41
Last Modified:27 Jul 2010 10:19

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