Microstructure and reactivity of Fe2O3-Li2CO3-ZnO ferrite system ball-milled in a planetary mill

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5 Citations (Scopus)

Abstract

In this work, the microstructure of mechanically activated Fe2O3-Li2CO3-ZnO mixture for the lithium-zinc ferrites production was studied using the Brüner, Emmett, Teller and laser diffraction methods as well as X-ray diffraction and scanning electron microscopy analyses. The reactivity of reagent mixture was investigated by thermogravimetric and calorimetric analyses. The ball milling was performed in a AGO-2S high energy planetary ball mill with a vial rotation speed of 2220 rpm using steel grinding balls. The milling times were 0, 5, 15, 30 or 60 min. It was shown that the composition of mixture changes during the ball milling, which consists in decreasing the α-Fe2O3 concentration and increasing the Fe3O4 spinel phase, while the Li2CO3 and ZnO concentrations remain unchanged. It was found that the milling leads to decrease in the average particle size of the reagents and simultaneously formation of large size agglomerates with denser structure and well-interlinked particles. It was established that observed changes in microstructure and phase composition lead to an increase in the reactivity of the Fe2O3-Li2CO3-ZnO system and the acceleration of the chemical reaction between reagents.

Original languageEnglish
Pages (from-to)100-107
Number of pages8
JournalThermochimica Acta
Volume664
DOIs
Publication statusPublished - 10 Jun 2018

Fingerprint

Ferrite
balls
ferrites
reactivity
Ball milling
reagents
microstructure
Microstructure
Ball mills
Ferrites
Steel
Lithium
Phase composition
Zinc
Chemical reactions
grinding
Diffraction
Particle size
diffraction
spinel

Keywords

  • LiZn ferrite
  • Mechanical activation
  • Microstructure
  • Reactivity
  • Substituted lithium ferrite
  • Thermal analysis

ASJC Scopus subject areas

  • Instrumentation
  • Condensed Matter Physics
  • Physical and Theoretical Chemistry

Cite this

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title = "Microstructure and reactivity of Fe2O3-Li2CO3-ZnO ferrite system ball-milled in a planetary mill",
abstract = "In this work, the microstructure of mechanically activated Fe2O3-Li2CO3-ZnO mixture for the lithium-zinc ferrites production was studied using the Br{\"u}ner, Emmett, Teller and laser diffraction methods as well as X-ray diffraction and scanning electron microscopy analyses. The reactivity of reagent mixture was investigated by thermogravimetric and calorimetric analyses. The ball milling was performed in a AGO-2S high energy planetary ball mill with a vial rotation speed of 2220 rpm using steel grinding balls. The milling times were 0, 5, 15, 30 or 60 min. It was shown that the composition of mixture changes during the ball milling, which consists in decreasing the α-Fe2O3 concentration and increasing the Fe3O4 spinel phase, while the Li2CO3 and ZnO concentrations remain unchanged. It was found that the milling leads to decrease in the average particle size of the reagents and simultaneously formation of large size agglomerates with denser structure and well-interlinked particles. It was established that observed changes in microstructure and phase composition lead to an increase in the reactivity of the Fe2O3-Li2CO3-ZnO system and the acceleration of the chemical reaction between reagents.",
keywords = "LiZn ferrite, Mechanical activation, Microstructure, Reactivity, Substituted lithium ferrite, Thermal analysis",
author = "Elena Lysenko and Evgeniy Nikolaev and Vitaliy Vlasov and Anatoliy Surzhikov",
year = "2018",
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T1 - Microstructure and reactivity of Fe2O3-Li2CO3-ZnO ferrite system ball-milled in a planetary mill

AU - Lysenko, Elena

AU - Nikolaev, Evgeniy

AU - Vlasov, Vitaliy

AU - Surzhikov, Anatoliy

PY - 2018/6/10

Y1 - 2018/6/10

N2 - In this work, the microstructure of mechanically activated Fe2O3-Li2CO3-ZnO mixture for the lithium-zinc ferrites production was studied using the Brüner, Emmett, Teller and laser diffraction methods as well as X-ray diffraction and scanning electron microscopy analyses. The reactivity of reagent mixture was investigated by thermogravimetric and calorimetric analyses. The ball milling was performed in a AGO-2S high energy planetary ball mill with a vial rotation speed of 2220 rpm using steel grinding balls. The milling times were 0, 5, 15, 30 or 60 min. It was shown that the composition of mixture changes during the ball milling, which consists in decreasing the α-Fe2O3 concentration and increasing the Fe3O4 spinel phase, while the Li2CO3 and ZnO concentrations remain unchanged. It was found that the milling leads to decrease in the average particle size of the reagents and simultaneously formation of large size agglomerates with denser structure and well-interlinked particles. It was established that observed changes in microstructure and phase composition lead to an increase in the reactivity of the Fe2O3-Li2CO3-ZnO system and the acceleration of the chemical reaction between reagents.

AB - In this work, the microstructure of mechanically activated Fe2O3-Li2CO3-ZnO mixture for the lithium-zinc ferrites production was studied using the Brüner, Emmett, Teller and laser diffraction methods as well as X-ray diffraction and scanning electron microscopy analyses. The reactivity of reagent mixture was investigated by thermogravimetric and calorimetric analyses. The ball milling was performed in a AGO-2S high energy planetary ball mill with a vial rotation speed of 2220 rpm using steel grinding balls. The milling times were 0, 5, 15, 30 or 60 min. It was shown that the composition of mixture changes during the ball milling, which consists in decreasing the α-Fe2O3 concentration and increasing the Fe3O4 spinel phase, while the Li2CO3 and ZnO concentrations remain unchanged. It was found that the milling leads to decrease in the average particle size of the reagents and simultaneously formation of large size agglomerates with denser structure and well-interlinked particles. It was established that observed changes in microstructure and phase composition lead to an increase in the reactivity of the Fe2O3-Li2CO3-ZnO system and the acceleration of the chemical reaction between reagents.

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KW - Mechanical activation

KW - Microstructure

KW - Reactivity

KW - Substituted lithium ferrite

KW - Thermal analysis

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