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Lin, Wen Hao; Hwang, Chii Shyang

doi:10.1023/a:1014376620601

Cited by 12 publications

(3 citation statements)

References 9 publications

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“…According to the literature [30], during the sintering of the compacts obtained from powder mixtures with a low degree of ferritization, shrinkage and ferritization processes occur simultaneously. The authors of [31] demonstrated that the specific surface area decreases with increasing synthesis temperature. A powder with a smaller specific surface area has lower surface energy and is less active during sintering, which leads to a decrease in linear shrinkage.…”

Section: Resultsmentioning

confidence: 99%

Influence of the powders phase composition and sintering atmosphere on the structure and magnetic properties of Mn-Zn ferrites

Kuzmin,

Khabirov,

Mass

et al. 2023

Chim.Tech.Acta

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The magnetic properties of Mn-Zn ferrites depend strongly on the microstructure, chemical and phase composition. In this paper the effect of synthesis and sintering conditions on the structure, phase composition and properties of Mn-Zn ferrites is investigated. The specimens for the study were obtained by pressureless sintering. The magnetic properties were measured on a B-H analyzer. The structure was investigated by XRD and SEM. Materials with an average grain size of 2.2 μm were obtained by sintering at a temperature of 1265 °C. It was found that an increase in the synthesis temperature from 700 to 1000 °C promotes the growth of the initial magnetic permeability of these materials from 1100 to 1370. The rapid cooling of the powders synthesized at 1000 °C allows maintaining a high content of the spinel phase. In the structure of materials obtained by sintering powders with initially high spinel content at 1300 °C, grains of abnormally large size are formed. This leads to an increase in the initial permeability, magnetic induction at Hm = 1200 A/m, f = 10 kHz and magnetic losses at high frequencies (up to 500 kHz). A material with fine-grained structure was obtained by using air at the heating stage of pressureless sintering. This contributed to the reduction of magnetic losses without a significant decrease in Bm.

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Section: Resultsmentioning

confidence: 99%

Influence of the powders phase composition and sintering atmosphere on the structure and magnetic properties of Mn-Zn ferrites

Kuzmin,

Khabirov,

Mass

et al. 2023

Chim.Tech.Acta

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“…The results of the investigation provide the basis for further designing and manufacturing of high-powered electromagnetic shielding concrete at the low frequency range. The maximum electromagnetic shielding effectiveness was up to 8.5dB in the low frequency range of 1MHz～1.8GH [27][28][29].…”

Section: Introductionmentioning

confidence: 99%

Effectiveness of Low Frequency Electromagnetic Shielding of Concrete with the Functionally Primitives Materials of Short Carbon Fibers and Graphite

Dong

2011

AMR

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The electromagnetic shielding properties of short carbon fibers and graphite concrete were investigated, and the influence of the contents of the short carbon fibers and graphite on the electromagnetic shielding effectiveness of the concrete in low frequency was studied. The mechanism causing the influence of the short carbon fibers adulteration on the electromagnetic shielding effectiveness of the graphite concrete at low frequency was investigated. The maximum electromagnetic shielding effectiveness was up to 8.5dB in the low frequency range of 1MHz～1.8GH. The results of the investigation provide the basis for further designing and producing of high-powered electromagnetic shielding concrete at low frequency.

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“…However, recently, a number of alternative preparation routes have been applied to the production of ferrite powder, such as coprecipitation, wet methods employing aqueous solutions and various gel techniques. [3][4][5] In previous works, a modified metal injection moulding process based on the use of thermosetting resin has been successfully applied to produce 316L stainless steels, 6 M2 7 and T15 8 high speed steels (HSS). The main advantage of this method is its simplicity: the moulding is carried out at room temperature by directly pouring the slurry (resin and powder) into the mould.…”

Section: Introductionmentioning

confidence: 99%

Processing of Mn–Zn ferrites using mould casting with acrylic thermosetting binder

Rodríguez-Senín¹,

Várez

Levenfeld³

et al. 2005

Powder Metallurgy

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In this paper, a simple manufacturing process for Mn-Zn ferrite powder is described, which can be considered as a modified powder injection moulding process. This method uses acrylic thermosetting resin as the binder. The moulding is carried out at room temperature by directly pouring the slurry (resin and ferrite) in the mould. The mixture is heated at the curing temperature (70uC) of resin to permit polymerisation and cross linking of the polymer. In order to optimise the moulding step, different volume fractions of powder with resin were mixed. The optimal powder load was 50 vol.-%. The best thermal debinding cycle was determined by means of thermogravimetric analysis. Sintering was performed according to oxygen partial pressure equilibrium curves at 1330uC for 3 h. Magnetic properties were compared with those obtained by uniaxial compacted parts.

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Untitled

Cited by 12 publications

References 9 publications

Influence of the powders phase composition and sintering atmosphere on the structure and magnetic properties of Mn-Zn ferrites

Influence of the powders phase composition and sintering atmosphere on the structure and magnetic properties of Mn-Zn ferrites

Effectiveness of Low Frequency Electromagnetic Shielding of Concrete with the Functionally Primitives Materials of Short Carbon Fibers and Graphite

Processing of Mn–Zn ferrites using mould casting with acrylic thermosetting binder

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