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The effect of nano-SiO2 on magnetic and dielectric properties of Li–Zn ferrite

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Published/Copyright: November 17, 2014
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International Journal of Materials Research
From the journal International Journal of Materials Research Volume 105 Issue 11

Abstract

Densification, grain growth, magnetic and dielectric properties of sintered Li–Zn ferrite (Li0.3Zn0.4Fe2.3O4) doped with nano silicon dioxide (10 nm) were investigated. The density and microstructural results revealed that increasing the nano-SiO2 content resulted in lower density and higher porosity at sintering temperatures below 1 000 °C, whereas at higher temperatures, this led to higher density and grain growth. In addition, nano-SiO2 content greater than 2 wt.% resulted in more reduction in porosity and had no effect on grain growth. Moreover, the highest density and the maximum induction (Bs = 380 mT) were obtained for the sample containing 2 wt.% nano-SiO2 and sintered at 1 100 °C for 1.5 h, in comparison with undoped samples. Furthermore, the variation of magneto-dielectric properties as a function of frequency were explained according to Koop's theory and electron hopping between the Fe+ 2 and Fe+ 3 ions.

Keywords: Ferrites; Dielectric; Sintering; Magnetic; SiO2
* Majid Kavanlouei, Sahand University of Technology, Young Researchers and Elite Club, Tabriz Branch, Islamic Azad University, Tabriz, Iran. Tel.: +989151880422, Fax: +983355452294, E-mail: ,

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Received: 2014-03-11
Accepted: 2014-05-27
Published Online: 2014-11-17
Published in Print: 2014-11-10

© 2014, Carl Hanser Verlag, München

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https://doi.org/10.3139/146.111122
Keywords for this article
Ferrites; Dielectric; Sintering; Magnetic; SiO2

Articles in the same Issue

  1. Contents
  2. Contents
  3. Original Contributions
  4. Thermodynamic description of the Ta–W–Zr system
  5. Interrelationships of defects, nitride modification and excess nitrogen in nitrided Fe-4.75 at.% Al alloy
  6. Effects of rotating magnetic and ultrasonic fields on the microstructure and mechanical properties of Al-8 wt.%Si alloy
  7. Microstructural control of Ti-46Al-7Nb-0.7Cr-0.2Ni-0.1Si alloy by heat treatment
  8. Structure and mechanical properties of Zn-(5–25) Al alloys
  9. Hot ductility behavior of near-alpha titanium alloy IMI834
  10. The effect of nano-SiO2 on magnetic and dielectric properties of Li–Zn ferrite
  11. Production of aluminum nano-composite reinforced by tungsten carbide particles via mechanical milling and subsequent hot pressing
  12. Short Communications
  13. Microstructure and texture evolution of Mg–Li alloy during rolling
  14. Microstructure and mechanical properties of Ti2AlC-reinforced TiAl composites
  15. Thermal fatigue behavior of cast superalloy Inconel 713LC
  16. Study of structural, morphological and optical properties of S and Cu co-doped SnO2 nanostructured thin films prepared by spray pyrolysis
  17. Synthesis and characterization of zirconium nitride coatings by cathodic arc sputtering technique
  18. Plasmon enhanced scattering and fluorescence in amorphous matrix
  19. Novel preparation of a porous composite insulating scaffold from forsterite and sodium carbonate media
  20. People
  21. Werner Mader, 65 years
  22. DGM News
  23. DGM News
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