Kinetic analysis of lithium–titanium ferrite formation from mechanically milled reagents; Materials Chemistry and Physics; Vol. 239
| Parent link: | Materials Chemistry and Physics Vol. 239.— 2020.— [122055, 7 p.] |
|---|---|
| مؤلفون مشاركون: | , |
| مؤلفون آخرون: | , , , |
| الملخص: | Title screen 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. Режим доступа: по договору с организацией-держателем ресурса |
| اللغة: | الإنجليزية |
| منشور في: |
2020
|
| الموضوعات: | |
| الوصول للمادة أونلاين: | https://doi.org/10.1016/j.matchemphys.2019.122055 |
| التنسيق: | الكتروني فصل الكتاب |
| KOHA link: | https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=662898 |
MARC
| LEADER | 00000naa0a2200000 4500 | ||
|---|---|---|---|
| 001 | 662898 | ||
| 005 | 20250416103321.0 | ||
| 035 | |a (RuTPU)RU\TPU\network\34057 | ||
| 090 | |a 662898 | ||
| 100 | |a 20201204d2020 k||y0rusy50 ba | ||
| 101 | 0 | |a eng | |
| 135 | |a drcn ---uucaa | ||
| 181 | 0 | |a i | |
| 182 | 0 | |a b | |
| 200 | 1 | |a Kinetic analysis of lithium–titanium ferrite formation from mechanically milled reagents |f E. N. Lysenko, E. V. Nikolaev, A. P. Surzhikov, S. A. Nikolaeva | |
| 203 | |a Text |c electronic | ||
| 300 | |a Title screen | ||
| 320 | |a [References: 34 tit.] | ||
| 330 | |a 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. | ||
| 333 | |a Режим доступа: по договору с организацией-держателем ресурса | ||
| 461 | |t Materials Chemistry and Physics | ||
| 463 | |t Vol. 239 |v [122055, 7 p.] |d 2020 | ||
| 610 | 1 | |a электронный ресурс | |
| 610 | 1 | |a труды учёных ТПУ | |
| 610 | 1 | |a mechanical milling | |
| 610 | 1 | |a kinetic analysis | |
| 610 | 1 | |a lithium-titanium ferrite | |
| 610 | 1 | |a thermal analysis | |
| 610 | 1 | |a фрезерование | |
| 610 | 1 | |a кинетический анализ | |
| 610 | 1 | |a литий-титановые ферриты | |
| 610 | 1 | |a термический анализ | |
| 701 | 1 | |a Lysenko |b E. N. |c Specialist in the field of electrical engineering |c Professor of Tomsk Polytechnic University, Doctor of technical sciences |f 1972- |g Elena Nikolaevna |3 (RuTPU)RU\TPU\pers\32050 |9 16097 | |
| 701 | 1 | |a Nikolaev |b E. V. |c specialist in the field of electrical engineering |c engineer of Tomsk Polytechnic University |f 1989- |g Evgeny Vladimirovich |3 (RuTPU)RU\TPU\pers\34529 |9 17910 | |
| 701 | 1 | |a Surzhikov |b A. P. |c physicist |c Professor of Tomsk Polytechnic University, doctor of physical and mathematical sciences (DSc) |f 1951- |g Anatoly Petrovich |3 (RuTPU)RU\TPU\pers\30237 |9 14617 | |
| 701 | 1 | |a Nikolaeva |b S. A. |c specialist in the field of electrical engineering |c Laboratory assistant researcher of Tomsk Polytechnic University |f 1990- |g Svetlana Andreevna |3 (RuTPU)RU\TPU\pers\37341 |9 20260 | |
| 712 | 0 | 2 | |a Национальный исследовательский Томский политехнический университет |b Институт неразрушающего контроля |b Проблемная научно-исследовательская лаборатория электроники, диэлектриков и полупроводников |3 (RuTPU)RU\TPU\col\19033 |9 27309 |
| 712 | 0 | 2 | |a Национальный исследовательский Томский политехнический университет |b Инженерная школа неразрушающего контроля и безопасности |b Отделение контроля и диагностики |3 (RuTPU)RU\TPU\col\23584 |9 28375 |
| 801 | 2 | |a RU |b 63413507 |c 20201204 |g RCR | |
| 850 | |a 63413507 | ||
| 856 | 4 | |u https://doi.org/10.1016/j.matchemphys.2019.122055 | |
| 942 | |c CF | ||