Dilatometric and kinetic analysis of sintering Li–Zn ferrite ceramics from milled reagents; Journal of Thermal Analysis and Calorimetry; Vol. 142, iss. 5

Bibliografiska uppgifter
Parent link:	Journal of Thermal Analysis and Calorimetry Vol. 142, iss. 5.— 2020.— [P. 1783–1789]
Institutionella upphovsmän:	Национальный исследовательский Томский политехнический университет Инженерная школа неразрушающего контроля и безопасности Отделение контроля и диагностики, Национальный исследовательский Томский политехнический университет Институт неразрушающего контроля Проблемная научно-исследовательская лаборатория электроники, диэлектриков и полупроводников
Övriga upphovsmän:	Nikolaev E. V. Evgeny Vladimirovich, Lysenko E. N. Elena Nikolaevna, Surzhikov A. P. Anatoly Petrovich, Gyngazov (Ghyngazov) S. A. Sergey Anatolievich, Bordunov S. V. Sergey Vladimirovich, Nikolaeva S. A. Svetlana Andreevna
Sammanfattning:	Title screen The impact of mechanical milling of the mixture of Fe2O3–Li2CO3–ZnO reagents on thermal sintering of lithium–zinc ferrites of Li0.4Fe2.4Zn0.2O4 composition was studied using X-ray diffraction, dilatometric and kinetic analyses. The dilatometric analysis showed that mechanical pre-activation of the mixture of the initial reagents in a planetary mill reduces the initial shrinkage point and accelerates compaction of ferrite-pressed samples during sintering, which ultimately increases the density of the finished ferrite ceramics. The sintering of lithium–zinc ferrite from a non-milled mixture proceeds in two steps. At the first stage, the samples show linear expansion, and at ~?720 °C, a sharp shrinkage occurs. The data obtained from milled samples indicate that shrinkage starts at lower temperatures and is in the range of 370–400 °C. This result allows simultaneous synthesis and sintering of lithium–zinc ferrite through one-stage heating of pressed samples to the sintering point. The resulting lithium–zinc ferrite ceramics exhibits high density, specific magnetization and Curie temperature. The kinetic analysis of ferrite compaction was performed, and kinetic parameters and the model to describe this process were found. Режим доступа: по договору с организацией-держателем ресурса
Språk:	engelska
Publicerad:	2020
Ämnen:	электронный ресурс труды учёных ТПУ lithium–zinc ceramics mechanical milling dilatometric analysis kinetic analysis фрезерование литий-цинковые ферриты керамика кинетический анализ
Länkar:	https://doi.org/10.1007/s10973-020-10326-5
Materialtyp:	Elektronisk Bokavsnitt
KOHA link:	https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=662897