Electron-microscopic study of morphology and phase composition of lithium-titanium ferrites

Anatoly Petrovich Surzhikov, A. M. Pritulov, Yu F. Ivanov, R. S. Shabardin, R. U. Usmanov

Research output: Contribution to journalArticle

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Abstract

In the present paper, the phase composition and morphology of lithium-titanium ferrospinel, synthesized by ceramic technology and subjected to thermal (T) and radiation-thermal (RT) annealing at a temperature of 1373 K, are studied. RT annealing of samples was performed by heating radiation of high-power electron beam pulses with energy 1.8 MeV. Bulk-density powders and powders compacted under a pressure of 1200 kg/cm2 were used as samples. The results obtained indicate the polyphase composition of initial powders. Annealing decreases the relative content of the secondary LiFeO2-based phase and increases the relative content of the master LiFe5O8-based phase. The efficiency of this process depends on the powder compactness and the heating regime. RT annealing significantly increases the rate of dissolution of the LiFeO2-based phase. An impact diffraction analysis has shown that the secondary phases have poly crystalline structures, whereas the LiFe5O8-based phase is formed by monocrystalline particles. Annealing of the compacted powder by an electron beam completely eliminates polycrystalline aggregates with ultradisperse grained structure.

Original languageEnglish
Pages (from-to)420-423
Number of pages4
JournalRussian Physics Journal
Volume44
Issue number4
DOIs
Publication statusPublished - 1 Jan 2001

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ferrites
titanium
lithium
thermal radiation
annealing
electrons
electron beams
radiant heating
void ratio
dissolving
ceramics
heating
pulses
diffraction
temperature
energy

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Electron-microscopic study of morphology and phase composition of lithium-titanium ferrites. / Surzhikov, Anatoly Petrovich; Pritulov, A. M.; Ivanov, Yu F.; Shabardin, R. S.; Usmanov, R. U.

In: Russian Physics Journal, Vol. 44, No. 4, 01.01.2001, p. 420-423.

Research output: Contribution to journalArticle

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AU - Shabardin, R. S.

AU - Usmanov, R. U.

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AB - In the present paper, the phase composition and morphology of lithium-titanium ferrospinel, synthesized by ceramic technology and subjected to thermal (T) and radiation-thermal (RT) annealing at a temperature of 1373 K, are studied. RT annealing of samples was performed by heating radiation of high-power electron beam pulses with energy 1.8 MeV. Bulk-density powders and powders compacted under a pressure of 1200 kg/cm2 were used as samples. The results obtained indicate the polyphase composition of initial powders. Annealing decreases the relative content of the secondary LiFeO2-based phase and increases the relative content of the master LiFe5O8-based phase. The efficiency of this process depends on the powder compactness and the heating regime. RT annealing significantly increases the rate of dissolution of the LiFeO2-based phase. An impact diffraction analysis has shown that the secondary phases have poly crystalline structures, whereas the LiFe5O8-based phase is formed by monocrystalline particles. Annealing of the compacted powder by an electron beam completely eliminates polycrystalline aggregates with ultradisperse grained structure.

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