The role of prefiring in the development of Mn–Zn spinel ferrites for inductive power transfer

Stergiou, Charalampos A.; Zaspalis, V.T.

doi:10.1016/j.ceramint.2014.12.034

Cited by 12 publications

(4 citation statements)

References 6 publications

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“…It was found that an increase in the synthesis temperature from 700 to 1000 °C leads to an increase in the average grain size by about 30% and an expansion of the grain size distribution. As compared to the reference data, the grain size in the obtained materials is rather small [32]. The finegrained structure is suggested to be formed as a result of inhibition of inter-grain boundary mobility by segregated calcium cations.…”

Section: Resultsmentioning

confidence: 65%

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: 65%

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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“…Dobak et al [105] studied miniaturization of components due to low loss MnZn ferrites. Also, Sun et al [138]studied effect of ZrO 2 addition on the microstructure and various properties of MnZn ferrites and found that the optimal values of initial permeability (2322), saturation magnetization (522mT) and power loss (386kW/m 3 ) make it suitable for switch mode power supply applications.Due to suitable electrical and magnetic properties of the Sc 3+ doped Mn-Zn ferrites, these were useful for modern technological application as well as for low and high frequency application.MnZn ferrites are also used to construct power inductors [254,255], wireless power transfer applications [256] and for making inductive components [39].…”

Section: 4electronic Devicesmentioning

confidence: 99%

A review on MnZn ferrites: Synthesis, characterization and applications

Thakur

Chahar

Taneja

et al. 2020

Ceramics International

270

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Researchers are taking great interest in the synthesis and characterization of MnZn ferrites due to their wide range of applications in many areas. MnZn ferrites are a class of soft magnetic materials that have very good electrical, magnetic and optical properties. The properties of MnZn ferrites include high value of resistivity, permeability, permittivity, saturation magnetization, low power losses and coercivity. The above mentioned advantageous features of MnZn ferrites make them suitable for the use in various applications. In biomedical field these ferrites are used for cancer treatment and MRI. MnZn ferrites are also used in electronic applications for making transformers, transducers and inductors. These ferrites are also used in magnetic fluids, sensors and biosensors. MnZn ferrite is highly useful material for several electrical and electronic applications. It finds applications in almost every household appliances like mobile charger, LED bulb, TV, refrigerator, juicer mixer, washing machine, iron, microwave oven, mobile, laptop, desktop, printer and so on. Therefore, the present review focuses on different techniques for synthesis of MnZn ferrites in literature, their characterization tools, effect of doping on the properties of MnZn ferrite and finally we will discuss about their applications.

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“…Several approaches have been applied to improve the microstructure and magnetic properties of ferrite ceramics: (1) Optimization of sintering techniques [20][21][22][23]. Feasible sintering techniques, such as two-step sintering and microwave sintering, have been developed and proven to be effective for the refinement of ferrite microstructures [24][25][26].…”

Section: Introduction mentioning

confidence: 99%

Synergistic effect of V2O5 and Bi2O3 on the grain boundary structure of high-frequency NiCuZn ferrite ceramics

et al. 2022

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High-frequency soft magnetic ferrite ceramics are desired in miniaturized and efficient power electronics but remain extremely challenging to deploy on account of the power loss (Pcv) at megahertz frequencies. Here, we prepared NiCuZn ferrite with superior high-frequency properties by V2O5 and Bi2O3 synergistic doping, which proves to be a potent pathway to reduce Pcv of the ferrite at megahertz frequencies. The sample doped with 800 ppm V2O5 and 800 ppm Bi2O3 yielded the most optimized magnetic properties with a Pcv of 113 kW/m3 (10 MHz, 5 mT, 25 °C), an initial permeability (μi) of 89, and a saturation induction (Bs) of 340 mT, which is at the forefront of the reported results. These outstanding properties are closely related to the notable grain boundary structure, which features a new type of nano-Bi2Fe4O9 phase around ferrite grains and a Ca/Si/V/O amorphous layer. Our results indicate great strides in correlating the grain boundary structure with multiple-ion doping and set the scene for the developing high-frequency soft magnet ferrites.

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The role of prefiring in the development of Mn–Zn spinel ferrites for inductive power transfer

Cited by 12 publications

References 6 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

A review on MnZn ferrites: Synthesis, characterization and applications

Synergistic effect of V2O5 and Bi2O3 on the grain boundary structure of high-frequency NiCuZn ferrite ceramics

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