Synthesis, structure and properties of barium and barium lead hexaferrite

Gudkova, S.A.; Винник, Д.А.; Живулин, В.Е.; Chernukha, A.S.; Жеребцов, Д. А.; Trofimov, Evgeny; Trukhanov, S. V.; Kalandija, M.; Семисалова, А.С.; Перов, Н. С.; Senin, A.V.; Zabeivorota, N.S.; Михайлов, Г. Г.

doi:10.1016/j.jmmm.2017.11.114

Cited by 11 publications

(4 citation statements)

References 26 publications

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“…[1][2][3][4][5] The notable interest of the scientic community can be associated with a signicant correlation between the chemical composition of the oxide compound (cation ratio, anionic stoichiometry), local crystal structure, and its optical, electrical, microwave, and magnetic characteristics. [6][7][8][9][10] The practical importance of such studies is due to the prospects for the wide use of multicomponent oxide systems in medicine, electronics, industry, ecology, etc. It should be claried that ferrites, multicomponent oxide systems based on iron ions, are best studied in this class of compounds and most oen nd practical applications.…”

Section: Introductionmentioning

confidence: 99%

Crystal structure and peculiarities of microwave parameters of Co_1−xNi_xFe₂O₄ nano spinel ferrites

Hussein,

Saafan,

Abosheiasha

et al. 2023

RSC Adv.

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Section: Introductionmentioning

confidence: 99%

Crystal structure and peculiarities of microwave parameters of Co_1−xNi_xFe₂O₄ nano spinel ferrites

Hussein,

Saafan,

Abosheiasha

et al. 2023

RSC Adv.

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“…占位的研究中 [97,[100][101][102][103]105] [118] ，移动溶剂浮区法 [119] ，助熔剂法 [120][121][122][123][124][125] 等，其中最常见的制备方法是助熔剂法。在此之前，已经有一些关于 SrM 中 Sr 或 Fe 晶位被另一种离子替代的单晶样品合成的报道 [61,[126][127][128][129][130][131][132][133][134][135][136][137][138][139] ，而 La-Co SrM 单晶(Sr La 和 Co 非等量替代的建议 [63,97] ，例如与 La 成分相比，当 Co 的含量略微降低时，磁体的性能更好。Liu 等 [141] 对 145 组 La-Co SrM 多晶样品的实验数据进行机器学习，研究了 La 和 Co 的成分与磁体性能之间的关系，结果也表明当 La 的含量大于 Co 含量时矫顽力更大。此外， 57 Fe 穆斯堡尔谱和化学滴定法 [104] 表明 [140] ，x>y 样品中的 La 3+ 电荷补偿由 Co 2+ 和 Fe 2+ 完成 75, respectively) [140] . Charge compensation for La 3+ in the sample x>y is accomplished by Co 2+ and Fe 2+…”

Section: 单晶unclassified

Research progress of magnetic anisotropy enhancement mechanism of high-performance La-Co co-substituted M-type permanent magnet ferrites

Liu,

Wang,

et al. 2024

Acta Phys. Sin.

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La-Co co-substituted M-type ferrite,first reported at the end of the 20th century,has garnered continuous attention from researchers worldwide,serving as the cornerstone for high-performance permanent magnet ferrites.The unquenched orbital moments of Co2+ play a pivotal role in enhancing the uniaxial anisotropy of M-type ferrites.However,a comprehensive understanding of its microscopic mechanism remains elusive.In response to the escalating performance demands of ferrite materials,elucidating the mechanism behind magnetic anisotropy enhancement becomes imperative,alongside the quest for guiding principles facilitating the swift and cost-effective development of high-performance products.but its mechanism at the microscopic level has not been explained.This review encompasses a comprehensive analysis of various studies aimed at pinpointing the crystal sites of Co substitution within the lattice.These investigations including neutron diffraction,nuclear magnetic resonance,and Mössbauer spectroscopy delve into the fundamental origins underlying the enhancement of magnetic anisotropy,thereby furnishing valuable insights for material design strategies geared towards further augmenting the magnetic properties of permanent magnet ferrites.The exploration of Co-substitution sites has yielded noteworthy findings.Through meticulous examination and analysis,researchers have discerned the intricate interplay between Co ions and the lattice structure,shedding light on the mechanisms governing magnetic anisotropy enhancement.The current mainstream view is that Co ions tend to occupy more than one site,namely the 4f1,12k,and 2a sites,all of which are located within the spinel lattice.However,there have also been differing viewpoints,indicating that further exploration is needed to uncover the primary controlling factors influencing Co occupancy.Notably,the identification of specific Co substitution sites,especially the spin-down tetrahedron 4f1,has enabled targeted modifications,culminating in the fine-tuning of magnetic properties with remarkable precision.Furthermore,the reviewed studies underscore the pivotal role of crystallographic engineering in tailoring the magnetic characteristics of ferrite materials.By strategically manipulating Co substitution,researchers have harnessed the intrinsic properties of the lattice to amplify magnetic anisotropy,thereby unlocking new avenues for the advancement of permanent magnet ferrites.In conclusion,the collective findings outlined in this review herald a promising trajectory for the field of permanent magnet ferrites.Armed with a nuanced understanding of Co-substitution mechanisms,researchers are poised to chart novel pathways toward the development of next-generation ferrite materials boasting enhanced magnetic properties.

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“…Следовательно, можно сделать вывод, что данный тепловой эффект -следствие фазового перехода второго рода. [24][25][26] 457…”

Section: экспериментальная частьunclassified

“…4 указаны температуры Кюри исследуемых образцов, полученные по данным сканирующей дифференциальной калориметрии с учетом скорости нагрева печи. Температура Кюри для исходного гексаферрита бария приведена из литературных источников[24][25][26].…”

unclassified

Synthesis of Ferritic Ceramics BaFe(11.9–х)Mn0.1TixO19 by Solid-Phase Reaction

Pavlova,

Zhivulin,

Solizoda

et al. 2022

Chem

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Barium hexaferrite is among substances that are used to create materials in the field of electronics and energetics. Its special magnetic properties are important: high coercivity, magnetic permeability, etc. Recently the scientific community has shown great interest in the block structure of this material, which is expressed in high publication activity. However, an exhaustive review of the structure and properties of barium hexaferrite substituted with manganese and titanium has not yet been presented. Exactly these alloying elements, according to theoretical justifications, should significantly modify the crystal lattice and the properties of the object under study. In this paper the objects of research are ferritic materials with the structure of magneto plumbite. The aim of the study is to obtain a substituted ferrite composition BaFe(11.9-x)Mn0.1TixO19, where x= 0.1, 0.5, and 1. In the course of the study the technology of ob-taining the investigated material by solid-phase synthesis has been developed. It is shown that the optimal synthesis temperature is 1400 °C at an exposure time of 5 hours. The chemical composition was controlled by scanning electron microscopy with the function of microanalysis. It was also determined that the obtained ceramic samples had a large number of micropores, the average size of which was in the range of 5–50 micrometers. The lattice parameters of the synthesized material were evaluated using X-ray diffraction analysis. The nonmonotonicity of the change in the unit cell parameters was revealed. A correlation was established between the change in the Curie temperature and the increase in the concentration of alloying elements by differential scanning calorimetry.

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Synthesis, structure and properties of barium and barium lead hexaferrite

Cited by 11 publications

References 26 publications

Crystal structure and peculiarities of microwave parameters of Co_1−xNi_xFe₂O₄ nano spinel ferrites

Crystal structure and peculiarities of microwave parameters of Co_1−xNi_xFe₂O₄ nano spinel ferrites

Research progress of magnetic anisotropy enhancement mechanism of high-performance La-Co co-substituted M-type permanent magnet ferrites

Synthesis of Ferritic Ceramics BaFe(11.9–х)Mn0.1TixO19 by Solid-Phase Reaction

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Synthesis, structure and properties of barium and barium lead hexaferrite

Cited by 11 publications

References 26 publications

Crystal structure and peculiarities of microwave parameters of Co1−xNixFe2O4 nano spinel ferrites

Crystal structure and peculiarities of microwave parameters of Co1−xNixFe2O4 nano spinel ferrites

Research progress of magnetic anisotropy enhancement mechanism of high-performance La-Co co-substituted M-type permanent magnet ferrites

Synthesis of Ferritic Ceramics BaFe(11.9–х)Mn0.1TixO19 by Solid-Phase Reaction

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Crystal structure and peculiarities of microwave parameters of Co_1−xNi_xFe₂O₄ nano spinel ferrites

Crystal structure and peculiarities of microwave parameters of Co_1−xNi_xFe₂O₄ nano spinel ferrites