Pseudo-superparamagnetic behaviour of barium hexaferrite particles

Dudziak, Szymon; Ryżyńska, Zuzanna; Bielan, Zuzanna; Ryl, Jacek; Klimczuk, Tomasz; Zielińska‐Jurek, Anna

doi:10.1039/d0ra01619e

Cited by 24 publications

(8 citation statements)

References 96 publications

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“…Thus, an issue of the influence of a magnetic field and shear flow on the MVE in barium hexaferrite MFs is definitely not sufficiently studied. Although, magnetic and structural properties of such ferrofluids, as well as various methodological issues of synthesis of corresponding nanoplates and their physical and chemical properties have been studied in detail, for example, in [ 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 ], therefore, they are not a priority objective of this study.…”

Section: Introductionmentioning

confidence: 99%

Magnetoviscosity of a Magnetic Fluid Based on Barium Hexaferrite Nanoplates

2021

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This paper presents the results of an experimental study of the influence of an external magnetic field on the shear flow behaviour of a magnetic fluid based on barium hexaferrite nanoplates. With the use of rheometry, the magnetoviscosity and field-dependent yield-stress in the fluid are evaluated. The observed fluid behaviour is compared to that of ferrofluids with magnetic nanoparticles having high dipole interaction. The results obtained supplement the so-far poorly studied topic of the influence of magnetic nanoparticles’ shape on magnetoviscous effects. It is concluded that the parameter determining the observed magnetoviscous effects in the fluid under study is the ratio V2/l3, where V is the volume of the nanoparticle and l is the size of the nanoparticle in the direction corresponding to its orientation in the externally applied magnetic field.

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Section: Introductionmentioning

confidence: 99%

Magnetoviscosity of a Magnetic Fluid Based on Barium Hexaferrite Nanoplates

2021

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“…For some samples, values very close to the theoretical value of 72 Am 2 kg −1 . In all series, the highest magnetization was observed for single-phase BaFe 12 O 19 samples, because both BaFe 2 O 4 and Fe 2 O 3 , occurring as impurities, have no or weak ferromagnetic properties (Dudziak et al, 2020). Based on conducted Nikmanesh et al, 2019 with di erent levels of doping material concentration.…”

Section: Characteristics Of Bafe 12 O 19 As An Absorp-tion Of Electromagnetic Wavesmentioning

confidence: 95%

Review of The Effectiveness of Plant Media Extracts in Barium Hexaferrite Magnets (BaFe12O19)

Edianta

Fauzi

Naibaho

et al. 2021

sci. technol. indones.

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Betel leaf is a typical Indonesian herbal plant that propagates on other tree trunks. So far, betel leaf has only been used in biomedicine and traditional medicine, whereas the chemical compounds of betel leaf can be used to absorb electromagnetic waves. In this mini-review, we review several research results to discuss the potential effectiveness of betel leaf in barium hexaferrite as an absorber of electromagnetic radiation. We compiled this mini-review based on the literature review method that is discussed extensively and in-depth regarding the chemical composition of betel leaf, modification of the development of barium hexaferrite material with betel leaf media extract, characteristics of BaFe12O19 as absorption of electromagnetic waves, and the effectiveness of media extracts in BaFe12O19 as absorption of electromagnetic waves. Based on the results of the literature review, the modification of BaFe12O19 material synthesis can include microemulsion, solid-state, coprecipitation, sol-gel, and hydrothermal synthesis. So far, hydrothermal synthesis is a synthesis method of mixing betel leaf extract media and ferrite-based magnets that have been studied before. Betel leaf in ferrite-based magnetic materials has been studied not to damage the surface morphology and characteristics of the magnetic material. The results of the assessment also show the effectiveness of adding other elements or compounds such as Ni, Al2O3, and composites in ferrite-based magnetic materials that can absorb more than 90% of electromagnetic waves in the frequency range 2-18 GHz.

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“…Hexagonal ferrites (also referred as hexaferrites) represent a large class of magnetic ceramics with a hexagonal structure, which could be seen as an Fe 2 O 3 network distorted by the presence of larger cations, usually Sr, Ba, or Pb. Compared to their spinel relatives, they generally (i) require higher temperatures to be synthesized, (ii) form larger particles easily, and (iii) exhibit typical hard-ferromagnetic behavior, with a large value of magnetic remanence and coercivity [66]. The hexaferrite family might be classified into six sub-categories, depending on the complexity of their crystal structure: M-type, Z-type, Y-type, W-type, X-type, and U-type ferrites [67].…”

Section: Hexagonal Ferritesmentioning

confidence: 99%

“…remanence and coercivity [66]. The hexaferrite family might be classified into six sub-categories, depending on the complexity of their crystal structure: M-type, Z-type, Y-type, W-type, X-type, and U-type ferrites [67].…”

Section: Hexagonal Ferritesmentioning

confidence: 99%

Application of Spinel and Hexagonal Ferrites in Heterogeneous Photocatalysis

et al. 2021

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Semiconducting materials display unique features that enable their use in a variety of applications, including self-cleaning surfaces, water purification systems, hydrogen generation, solar energy conversion, etc. However, one of the major issues is separation of the used materials from the process suspension. Therefore, chemical compounds with magnetic properties have been proposed as crucial components of photocatalytic composites, facilitating separation and recovery of photocatalysts under magnetic field conditions. This review paper presents the current state of knowledge on the application of spinel and hexagonal ferrites in heterogeneous photocatalysis. The first part focuses on the characterization of magnetic (nano)particles. The next section presents the literature findings on the single-phase magnetic photocatalyst. Finally, the current state of scientific knowledge on the wide variety of magnetic-photocatalytic composites is presented. A key aim of this review is to indicate that spinel and hexagonal ferrites are considered as an important element of heterogeneous photocatalytic systems and are responsible for the effective recycling of the photocatalytic materials.

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Pseudo-superparamagnetic behaviour of barium hexaferrite particles

Abstract: Observed morphology evolution of BaFe12O19 ferrite particles, obtained with different relative amounts of surfactant used.

Cited by 24 publications

References 96 publications

Magnetoviscosity of a Magnetic Fluid Based on Barium Hexaferrite Nanoplates

Magnetoviscosity of a Magnetic Fluid Based on Barium Hexaferrite Nanoplates

Review of The Effectiveness of Plant Media Extracts in Barium Hexaferrite Magnets (BaFe12O19)

Application of Spinel and Hexagonal Ferrites in Heterogeneous Photocatalysis

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