Effect of Low Lanthanum Concentrations on the Structural and Electromagnetic Properties of a Lithium Ferrite; Physics of Metals and Metallography; Vol. 126, iss. 13
| Parent link: | Physics of Metals and Metallography.— .— New York: Springer Science+Business Media LLC. Vol. 126, iss. 13.— 2025.— P. 1721-1728 |
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| Další autoři: | , , , |
| Shrnutí: | Title screen A comprehensive study of the effect of small additions of lanthanum hydroxide on the structural, magnetic and electrical properties of lithium ferrite is performed. Ferrites are prepared by ceramic method that includes the preliminary synthesis at 900°C and subsequent high-temperature sintering at 1150°C. The 1.5–13.9 wt % additions of La(OH)3 are shown to lead to the formation of two-phase structure consisting of the Li0.5Fe2.5O4 lithium ferrite spinel phase and the LaFeO3 perovskite-like phase with an orthorhombic structure. The formation of the LaFeO3 secondary phase with both rounded grains and needle-shaped structure is shown to slow down the grain growth and recrystallization processes of lithium ferrite; this leads to the preservation of the fine-grained structure of the samples. In this case, whatever the concentration of the introduced rare earth element, the porosity of the samples did not exceed 5%. The introduction of lanthanum in the course of preparation of lithium ferrites leads to the decrease in the saturation magnetization and initial magnetic permeability and the significant increase in the specific electrical resistivity, which depends on the phase ratio in the Li0.5Fe2.5O4–LaFeO3 (ferrimagnet-antiferromagnet) composite material and on the material structure. From the point of view of the balance of electrical and magnetic parameters, the optimum addition is found to be the small amount (1.5 wt %) of La(OH)3, which provides the significant increase in the electrical resistivity up to 108 Ω cm and the minimum decrease in the saturation magnetization to 58 G cm3/g and initial magnetic permeability to 30. Such samples are characterized by the high Curie temperature equal to 630°C Текстовый файл AM_Agreement |
| Jazyk: | angličtina |
| Vydáno: |
2025
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| Témata: | |
| On-line přístup: | https://doi.org/10.1134/S0031918X25602082 |
| Médium: | Elektronický zdroj Kapitola |
| KOHA link: | https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=685915 |
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| 200 | 1 | |a Effect of Low Lanthanum Concentrations on the Structural and Electromagnetic Properties of a Lithium Ferrite |f Yu. S. Elkina, E. N. Lysenko, V. A. Vlasov, A. P. Surzhikov | |
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| 300 | |a Title screen | ||
| 320 | |a References: 32 tit | ||
| 330 | |a A comprehensive study of the effect of small additions of lanthanum hydroxide on the structural, magnetic and electrical properties of lithium ferrite is performed. Ferrites are prepared by ceramic method that includes the preliminary synthesis at 900°C and subsequent high-temperature sintering at 1150°C. The 1.5–13.9 wt % additions of La(OH)3 are shown to lead to the formation of two-phase structure consisting of the Li0.5Fe2.5O4 lithium ferrite spinel phase and the LaFeO3 perovskite-like phase with an orthorhombic structure. The formation of the LaFeO3 secondary phase with both rounded grains and needle-shaped structure is shown to slow down the grain growth and recrystallization processes of lithium ferrite; this leads to the preservation of the fine-grained structure of the samples. In this case, whatever the concentration of the introduced rare earth element, the porosity of the samples did not exceed 5%. The introduction of lanthanum in the course of preparation of lithium ferrites leads to the decrease in the saturation magnetization and initial magnetic permeability and the significant increase in the specific electrical resistivity, which depends on the phase ratio in the Li0.5Fe2.5O4–LaFeO3 (ferrimagnet-antiferromagnet) composite material and on the material structure. From the point of view of the balance of electrical and magnetic parameters, the optimum addition is found to be the small amount (1.5 wt %) of La(OH)3, which provides the significant increase in the electrical resistivity up to 108 Ω cm and the minimum decrease in the saturation magnetization to 58 G cm3/g and initial magnetic permeability to 30. Such samples are characterized by the high Curie temperature equal to 630°C | ||
| 336 | |a Текстовый файл | ||
| 371 | 0 | |a AM_Agreement | |
| 461 | 1 | |t Physics of Metals and Metallography |c New York |n Springer Science+Business Media LLC. | |
| 463 | 1 | |t Vol. 126, iss. 13 |v P. 1721-1728 |d 2025 | |
| 610 | 1 | |a lithium ferrite | |
| 610 | 1 | |a lanthanum hydroxide | |
| 610 | 1 | |a microstructure | |
| 610 | 1 | |a electromagnetic properties | |
| 610 | 1 | |a high-temperature sintering | |
| 610 | 1 | |a электронный ресурс | |
| 610 | 1 | |a труды учёных ТПУ | |
| 701 | 1 | |a Elkina |g Yuliya Sergeevna |b Yu. S. |f 1997- |c chemical engineer |c Research engineer of Tomsk Polytechnic University |9 88790 | |
| 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 |9 16097 | |
| 701 | 1 | |a Vlasov |b V. A. |c Physicist |c Senior researcher of Tomsk Polytechnic University, Candidate of physical and mathematical sciences |f 1975- |g Vitaliy Anatolievich |9 15577 | |
| 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 |9 14617 | |
| 801 | 0 | |a RU |b 63413507 |c 20260402 |g RCR | |
| 856 | 4 | 0 | |u https://doi.org/10.1134/S0031918X25602082 |z https://doi.org/10.1134/S0031918X25602082 |
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