TG, DSC, XRD, and SEM studies of the substituted lithium ferrite formation from milled Sm2O3/Fe2O3/Li2CO3 precursors

TG, DSC, XRD, and SEM studies of the substituted lithium ferrite formation from milled Sm2O3/Fe2O3/Li2CO3 precursors

Podrobná bibliografie
Parent link:Journal of Thermal Analysis and Calorimetry
Vol. 148.— 2023.— [P. 1445-1453]
Korporativní autor: Национальный исследовательский Томский политехнический университет Институт неразрушающего контроля Проблемная научно-исследовательская лаборатория электроники, диэлектриков и полупроводников
Další autoři: Lysenko E. N. Elena Nikolaevna, Vlasov V. A. Vitaliy Anatolievich, Nikolaeva S. A. Svetlana Andreevna, Nikolaev E. V. Evgeny Vladimirovich
Shrnutí:Title screen
Formation of substituted lithium ferrite Li0.5SmxFe2.5–xO4 (where x = 0.06 and 0.2) from Sm2O3/Fe2O3/Li2CO2 precursors was studied by X-ray diffraction analysis, thermogravimetry, differential scanning calorimetry, and scanning electron microscopy. The mixture of powders was subjected to preliminary mechanical activation in a planetary mill. We analyzed samples based on the precursors and synthesized at 900 °C for 4 h in a laboratory furnace. It was found that ball milling of the precursors mixture in a planetary mill increases the powder reactivity. In spite of this, no substituted lithium ferrites were formed. It was shown that a two-phase composite that consists of pure lithium ferrite Li0.5Fe2.5O4 and SmFeO3 is formed during synthesis. An increase in the Sm2O3 content in the initial mixture provides an increase in the amount of the formed SmFeO3 phase. The synthesis of Li0.5Fe2.5O4 ferrite was confirmed by XRD analysis data, the Curie temperature (627–630 °C) measured using TG analysis in a magnetic field, and by the presence of an endothermic peak on the DSC curve corresponding to the order–disorder transition in the Li0.5Fe2.5O4 phase.
Режим доступа: по договору с организацией-держателем ресурса
Vydáno: 2023
Témata:
электронный ресурс
труды учёных ТПУ
lithium ferrite
rare earth element
samarium
ball milling
microstructure
thermal analysis
On-line přístup:http://earchive.tpu.ru/handle/11683/74781
https://doi.org/10.1007/s10973-022-11665-1
Médium: Elektronický zdroj Kapitola
KOHA link:https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=669190

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