The influence of ZrO2 additive on sintering and microstructure of lithium and lithium-titanium-zinc ferrites

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Abstract

The effect of ZrO2 addition (0–3 wt%) on sintering and microstructure of lithium and lithium-titanium-zinc ferrites was studied. The Vickers hardness and dc electrical resistivity were investigated and discussed in correlation with the structural properties. Ferrite powders with the chemical compositions of LiFe5O8 and Li0.65Fe1.6Ti0.5Zn0.2Mn0.05O4 were prepared by the conventional ceramic technique. The synthesized ferrites were doped with various amount of ZrO2 and then were sintered at 1050 °C for 2 h. Dilatometric studies showed that the zirconia addition affects the densification process of ferrite ceramics so that the shrinkage rate of pressed ferrite powders during their heating decreased with an increase in ZrO2 content. The bulk density of the sintered ferrites varied slightly as the concentration of the additive was increased from 0 to 2 wt%, while the density of ferrite doped with 3 wt% ZrO2 significantly decreased. X-ray diffraction and scanning electron microscopy analyses showed that the lattice parameter of ferrites increases and their average grain size decreases as the additive content grows. It was established that small amounts of ZrO2 additive (up to 2 wt%) improve significantly the hardness and the electrical resistivity of ferrites.

Original languageEnglish
Pages (from-to)2736-2741
Number of pages6
JournalCeramics International
Volume45
Issue number2
DOIs
Publication statusPublished - 1 Feb 2019

Fingerprint

Ferrites
Titanium
Lithium
Zinc
Sintering
Ferrite
Microstructure
Powders
Vickers hardness
Densification
Zirconia
Lattice constants
Structural properties
Hardness
Heating
X ray diffraction
Scanning electron microscopy
Chemical analysis

Keywords

  • Lithium ferrites
  • Microstructure
  • Properties
  • Sintering
  • ZrO additive

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Process Chemistry and Technology
  • Surfaces, Coatings and Films
  • Materials Chemistry

Cite this

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title = "The influence of ZrO2 additive on sintering and microstructure of lithium and lithium-titanium-zinc ferrites",
abstract = "The effect of ZrO2 addition (0–3 wt{\%}) on sintering and microstructure of lithium and lithium-titanium-zinc ferrites was studied. The Vickers hardness and dc electrical resistivity were investigated and discussed in correlation with the structural properties. Ferrite powders with the chemical compositions of LiFe5O8 and Li0.65Fe1.6Ti0.5Zn0.2Mn0.05O4 were prepared by the conventional ceramic technique. The synthesized ferrites were doped with various amount of ZrO2 and then were sintered at 1050 °C for 2 h. Dilatometric studies showed that the zirconia addition affects the densification process of ferrite ceramics so that the shrinkage rate of pressed ferrite powders during their heating decreased with an increase in ZrO2 content. The bulk density of the sintered ferrites varied slightly as the concentration of the additive was increased from 0 to 2 wt{\%}, while the density of ferrite doped with 3 wt{\%} ZrO2 significantly decreased. X-ray diffraction and scanning electron microscopy analyses showed that the lattice parameter of ferrites increases and their average grain size decreases as the additive content grows. It was established that small amounts of ZrO2 additive (up to 2 wt{\%}) improve significantly the hardness and the electrical resistivity of ferrites.",
keywords = "Lithium ferrites, Microstructure, Properties, Sintering, ZrO additive",
author = "Lysenko, {E. N.} and Ghyngazov, {S. A.} and Surzhikov, {A. P.} and Nikolaeva, {S. A.} and Vlasov, {V. A.}",
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T1 - The influence of ZrO2 additive on sintering and microstructure of lithium and lithium-titanium-zinc ferrites

AU - Lysenko, E. N.

AU - Ghyngazov, S. A.

AU - Surzhikov, A. P.

AU - Nikolaeva, S. A.

AU - Vlasov, V. A.

PY - 2019/2/1

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N2 - The effect of ZrO2 addition (0–3 wt%) on sintering and microstructure of lithium and lithium-titanium-zinc ferrites was studied. The Vickers hardness and dc electrical resistivity were investigated and discussed in correlation with the structural properties. Ferrite powders with the chemical compositions of LiFe5O8 and Li0.65Fe1.6Ti0.5Zn0.2Mn0.05O4 were prepared by the conventional ceramic technique. The synthesized ferrites were doped with various amount of ZrO2 and then were sintered at 1050 °C for 2 h. Dilatometric studies showed that the zirconia addition affects the densification process of ferrite ceramics so that the shrinkage rate of pressed ferrite powders during their heating decreased with an increase in ZrO2 content. The bulk density of the sintered ferrites varied slightly as the concentration of the additive was increased from 0 to 2 wt%, while the density of ferrite doped with 3 wt% ZrO2 significantly decreased. X-ray diffraction and scanning electron microscopy analyses showed that the lattice parameter of ferrites increases and their average grain size decreases as the additive content grows. It was established that small amounts of ZrO2 additive (up to 2 wt%) improve significantly the hardness and the electrical resistivity of ferrites.

AB - The effect of ZrO2 addition (0–3 wt%) on sintering and microstructure of lithium and lithium-titanium-zinc ferrites was studied. The Vickers hardness and dc electrical resistivity were investigated and discussed in correlation with the structural properties. Ferrite powders with the chemical compositions of LiFe5O8 and Li0.65Fe1.6Ti0.5Zn0.2Mn0.05O4 were prepared by the conventional ceramic technique. The synthesized ferrites were doped with various amount of ZrO2 and then were sintered at 1050 °C for 2 h. Dilatometric studies showed that the zirconia addition affects the densification process of ferrite ceramics so that the shrinkage rate of pressed ferrite powders during their heating decreased with an increase in ZrO2 content. The bulk density of the sintered ferrites varied slightly as the concentration of the additive was increased from 0 to 2 wt%, while the density of ferrite doped with 3 wt% ZrO2 significantly decreased. X-ray diffraction and scanning electron microscopy analyses showed that the lattice parameter of ferrites increases and their average grain size decreases as the additive content grows. It was established that small amounts of ZrO2 additive (up to 2 wt%) improve significantly the hardness and the electrical resistivity of ferrites.

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KW - ZrO additive

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