Experimental and theoretical investigation of SrFe12O19 nanopowder for permanent magnet application

Abraime, B.; Tamerd, Mohamed Ait; Mahmoud, Abdelfattah; Boschini, Frèdéric; Benyoussef, A.; Hamedoun, M.; Xiao, Yinguo; Kenz, A. El; Mounkachi, O.

doi:10.1016/j.ceramint.2017.08.187

Cited by 29 publications

(8 citation statements)

References 30 publications

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“…The values of magnetic parameters of M s , M r , H c , and M r / M s are given in Table 1. Compared to previous studies on doped strontium hexaferrite, the values of M s and H c are improved 52,53 . However, the magnetization curves do not saturate even at an applied magnetic field of 20 kOe.…”

Section: Resultscontrasting

confidence: 71%

“…Compared to previous studies on doped strontium hexaferrite, the values of M s and H c are improved. 52,53 However, the magnetization curves do not saturate even at an applied magnetic field of 20 kOe. It is well accepted in ferromagnetic materials that the magnetization curves at high magnetic fields can be explained by the law of approach to saturation (LAS) which is given by 54…”

Section: Magnetic Propertiesmentioning

confidence: 99%

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Effects of Ca–Gd co‐substitution on the structural, magnetic, and dielectric properties of M‐type strontium hexaferrite

Gholizadeh

Banihashemi

2023

J Am Ceram Soc.

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Sr 1−x Ca x Fe 12−x Gd x O 19 (x = 0, 0.04, 0.08, 0.12, 0.16, 0.20) hexaferrites were characterized by several techniques, such as X-ray diffraction, scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy, and vibrating sample magnetometer. Structural results indicate the formation of a pure-phase Sr 1−x Ca x Fe 12−x Gd x O 19 hexaferrite with space group P6 3 /mmc. SEM photography confirms that there are a smaller number of defects due to the reduced porosity and surface area (increased particle size). Magnetic investigations showed a rise of the coercive force from 5069.8 to 5757.4 Oe and saturation magnetization from 79.25 to 80.68 emu/g. The maximum values appear to be for sample x = 0.16, which may be useful in such as permanent magnets, and high-density media for magnetic storage devices. Dielectric parameters, such as conductivity, the real part of permittivity, dielectric loss, dielectric tangent loss, and complex modulus, were studied. Impedance analysis shows that the conduction process is mainly governed by the long-range movement of the charge carriers based on the Debye model for x = 0.12.

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Section: Resultscontrasting

confidence: 71%

Section: Magnetic Propertiesmentioning

confidence: 99%

Effects of Ca–Gd co‐substitution on the structural, magnetic, and dielectric properties of M‐type strontium hexaferrite

Gholizadeh

Banihashemi

2023

J Am Ceram Soc.

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“…Currently, mitigating the impacts of excess electromagnetic waves has become a crucial objective due to their strong influence on the environment. [1][2][3][4] The radiation from electromagnetic waves (EMW) not only disrupts the normal functioning of electronic equipment but also poses a threat to human health. On the contrary, the rapid growth of electrical and electronic devices has resulted in an escalating demand for microwave-absorbing materials, which can be widely employed in various sectors such as industry, commerce, and defense.…”

Section: Introductionmentioning

confidence: 99%

“…Currently, mitigating the impacts of excess electromagnetic waves has become a crucial objective due to their strong influence on the environment 1–4 . The radiation from electromagnetic waves (EMW) not only disrupts the normal functioning of electronic equipment but also poses a threat to human health.…”

Section: Introductionmentioning

confidence: 99%

Molybdenum substituted M‐type hexagonal barium ferrite for high microwave absorption performance

Wu,

Dong,

et al. 2023

Int J Applied Ceramic Tech

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With the advancement of electrical and electronic devices, overcoming electromagnetic pollution turns into an urgent problem. In this work, high‐valence molybdenum (Mo6+) was doped into M‐type hexagonal barium ferrite (BaFe12‐xMoxO19) to improve its electromagnetic performance. The relationship between the Mo6+ doping concentration and the crystallographic structure, morphology and electromagnetic properties was studied in detail. Structural characterizations authenticate that the Mo6+ ions prefer the 2b site, increasing the lattice values and grain size, and boosting more Fe3+ conversion into Fe2+. The magnetic hysteresis loops demonstrate a reduction of saturation magnetization and coercivity values with the increase of Mo6+ concentration. While the microwave absorption properties were obviously improved by the doping Mo6+, and obtained the highest RLmin value of ‐56.12 dB@16.1GHz and effective absorption bandwidth of 4.2 GHz at x = 0.1, displaying a potential role in absorbing material.This article is protected by copyright. All rights reserved

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“…Метод химического соосаждения позволяет получать частицы гексаферрита с большей однородностью распределения по размерам, а также существенно меньших размеров, чем метод традиционной керамической технологии [4][5][6][7]. Поскольку меньшие по размеру частицы гексаферрита легче сориентировать в магнитном поле, это позволит получить высокие значения степени магнитной текстуры в пластинах гексаферритов при меньших энергетических затратах.…”

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Влияние технологии получения ферритизированного порошка на степень магнитной текстуры пластин гексаферритов BaFe-=SUB=-12-=/SUB=-O-=SUB=-19-=/SUB=- и SrFe-=SUB=-12-=/SUB=-O-=SUB=-19-=/SUB=-

Timofeev¹,

Костишин²,

Chitanov³

2019

Письма В Журнал Технической Физики

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The paper studies influence of the technology producing ferritized powder of barium and strontium hexaferrites on the degree of magnetic texture of plates based on them. It is shown that the use of chemical coprecipitation technology compared to ceramic technology allows to obtain hexaferrite plates with the same values of the magnetic field pressing of raw blanks, the degree of magnetic texture is 19 – 22 % higher.

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Experimental and theoretical investigation of SrFe12O19 nanopowder for permanent magnet application

Cited by 29 publications

References 30 publications

Effects of Ca–Gd co‐substitution on the structural, magnetic, and dielectric properties of M‐type strontium hexaferrite

Effects of Ca–Gd co‐substitution on the structural, magnetic, and dielectric properties of M‐type strontium hexaferrite

Molybdenum substituted M‐type hexagonal barium ferrite for high microwave absorption performance

Влияние технологии получения ферритизированного порошка на степень магнитной текстуры пластин гексаферритов BaFe-=SUB=-12-=/SUB=-O-=SUB=-19-=/SUB=- и SrFe-=SUB=-12-=/SUB=-O-=SUB=-19-=/SUB=-

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