Kinetic analysis of lithium–titanium ferrite formation from mechanically milled reagents

Research output: Contribution to journalArticle

Abstract

The effect of mechanical activation of a mixture of initial reagents Li2CO3–Fe2O3–TiO2 on solid-phase synthesis was investigated by X-ray diffraction and thermal analyses. In this study, the AGO-2S planetary ball mill was used for mechanical milling of the initial reagents. The X-ray diffraction patterns for mechanically activated mixtures show increased of the width intensities of reflections due to decreased crystallite size which caused by mechanical grinding. Thermal analysis showed that the reaction of lithium-titanium ferrite synthesis proceeds in two stages. For the initial mixture (non-milled), mass reduces within the temperature range of 430–720 °C. The results obtained for mechanically activated samples show that mass reduction in these samples begins at much lower temperatures and depends on the time of mechanical grinding. The main mass loss occurs in the temperature range of 420–520 °C with one-step decomposition of lithium carbonate. Thus, the results showed that the reaction of solid-phase interaction of lithium-titanium ferrite proceeds through a two-step mechanism. It is obvious that the reaction mechanism for lithium ferrite synthesis is complex, and it is controlled by diffusion processes. Consequently, a multi-stage model is used to describe the reaction kinetics. For mechanically activated mixtures, the Ginstling-Bronstein model was used at both stages.

Original languageEnglish
Article number122055
JournalMaterials Chemistry and Physics
Volume239
DOIs
Publication statusPublished - 1 Jan 2020

Fingerprint

reagents
Ferrite
ferrites
Lithium
lithium
Kinetics
kinetics
grinding
Titanium
solid phases
synthesis
titanium
Lithium Carbonate
X ray diffraction
Ball mills
Crystallite size
Reaction kinetics
Temperature
Thermoanalysis
Diffraction patterns

Keywords

  • Kinetic analysis
  • Lithium-titanium ferrite
  • Mechanical milling
  • Thermal analysis

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

Cite this

@article{d26ae35f56c2481788e06efa152e8f4e,
title = "Kinetic analysis of lithium–titanium ferrite formation from mechanically milled reagents",
abstract = "The effect of mechanical activation of a mixture of initial reagents Li2CO3–Fe2O3–TiO2 on solid-phase synthesis was investigated by X-ray diffraction and thermal analyses. In this study, the AGO-2S planetary ball mill was used for mechanical milling of the initial reagents. The X-ray diffraction patterns for mechanically activated mixtures show increased of the width intensities of reflections due to decreased crystallite size which caused by mechanical grinding. Thermal analysis showed that the reaction of lithium-titanium ferrite synthesis proceeds in two stages. For the initial mixture (non-milled), mass reduces within the temperature range of 430–720 °C. The results obtained for mechanically activated samples show that mass reduction in these samples begins at much lower temperatures and depends on the time of mechanical grinding. The main mass loss occurs in the temperature range of 420–520 °C with one-step decomposition of lithium carbonate. Thus, the results showed that the reaction of solid-phase interaction of lithium-titanium ferrite proceeds through a two-step mechanism. It is obvious that the reaction mechanism for lithium ferrite synthesis is complex, and it is controlled by diffusion processes. Consequently, a multi-stage model is used to describe the reaction kinetics. For mechanically activated mixtures, the Ginstling-Bronstein model was used at both stages.",
keywords = "Kinetic analysis, Lithium-titanium ferrite, Mechanical milling, Thermal analysis",
author = "Lysenko, {Elena N.} and Nikolaev, {Evgeniy V.} and Surzhikov, {Anatoly P.} and Nikolaeva, {Svetlana A.}",
year = "2020",
month = "1",
day = "1",
doi = "10.1016/j.matchemphys.2019.122055",
language = "English",
volume = "239",
journal = "Materials Chemistry and Physics",
issn = "0254-0584",
publisher = "Elsevier BV",

}

TY - JOUR

T1 - Kinetic analysis of lithium–titanium ferrite formation from mechanically milled reagents

AU - Lysenko, Elena N.

AU - Nikolaev, Evgeniy V.

AU - Surzhikov, Anatoly P.

AU - Nikolaeva, Svetlana A.

PY - 2020/1/1

Y1 - 2020/1/1

N2 - The effect of mechanical activation of a mixture of initial reagents Li2CO3–Fe2O3–TiO2 on solid-phase synthesis was investigated by X-ray diffraction and thermal analyses. In this study, the AGO-2S planetary ball mill was used for mechanical milling of the initial reagents. The X-ray diffraction patterns for mechanically activated mixtures show increased of the width intensities of reflections due to decreased crystallite size which caused by mechanical grinding. Thermal analysis showed that the reaction of lithium-titanium ferrite synthesis proceeds in two stages. For the initial mixture (non-milled), mass reduces within the temperature range of 430–720 °C. The results obtained for mechanically activated samples show that mass reduction in these samples begins at much lower temperatures and depends on the time of mechanical grinding. The main mass loss occurs in the temperature range of 420–520 °C with one-step decomposition of lithium carbonate. Thus, the results showed that the reaction of solid-phase interaction of lithium-titanium ferrite proceeds through a two-step mechanism. It is obvious that the reaction mechanism for lithium ferrite synthesis is complex, and it is controlled by diffusion processes. Consequently, a multi-stage model is used to describe the reaction kinetics. For mechanically activated mixtures, the Ginstling-Bronstein model was used at both stages.

AB - The effect of mechanical activation of a mixture of initial reagents Li2CO3–Fe2O3–TiO2 on solid-phase synthesis was investigated by X-ray diffraction and thermal analyses. In this study, the AGO-2S planetary ball mill was used for mechanical milling of the initial reagents. The X-ray diffraction patterns for mechanically activated mixtures show increased of the width intensities of reflections due to decreased crystallite size which caused by mechanical grinding. Thermal analysis showed that the reaction of lithium-titanium ferrite synthesis proceeds in two stages. For the initial mixture (non-milled), mass reduces within the temperature range of 430–720 °C. The results obtained for mechanically activated samples show that mass reduction in these samples begins at much lower temperatures and depends on the time of mechanical grinding. The main mass loss occurs in the temperature range of 420–520 °C with one-step decomposition of lithium carbonate. Thus, the results showed that the reaction of solid-phase interaction of lithium-titanium ferrite proceeds through a two-step mechanism. It is obvious that the reaction mechanism for lithium ferrite synthesis is complex, and it is controlled by diffusion processes. Consequently, a multi-stage model is used to describe the reaction kinetics. For mechanically activated mixtures, the Ginstling-Bronstein model was used at both stages.

KW - Kinetic analysis

KW - Lithium-titanium ferrite

KW - Mechanical milling

KW - Thermal analysis

UR - http://www.scopus.com/inward/record.url?scp=85071126784&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85071126784&partnerID=8YFLogxK

U2 - 10.1016/j.matchemphys.2019.122055

DO - 10.1016/j.matchemphys.2019.122055

M3 - Article

AN - SCOPUS:85071126784

VL - 239

JO - Materials Chemistry and Physics

JF - Materials Chemistry and Physics

SN - 0254-0584

M1 - 122055

ER -