The effect of the microstructure on the DC-bias superposition characteristic of NiCuZn ferrite

Yan, Shuoqing; Dong, Li Hua; Chen, Zhongyan; Wang, Xian; Zhang, Feng

doi:10.1016/j.jmmm.2013.10.006

Cited by 31 publications

(9 citation statements)

References 18 publications

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“…Higher values of HDC25%, lead to better DC-bias characteristics of ferrite samples. We have defined HDC25% instead of H50% or H70% as in [6], [7], [8] for NiCuZn ferrites because we want to use these cores in engineering applications where smaller DC-bias ranges are preferred. Table 2 shows the values of HDC25% of tested ferrite cores as a function of milling time and sintered temperature.…”

Section: Influence Of Dc-bias Magnetic Fieldmentioning

confidence: 99%

“…Due to the widespread use of ferrite inductors, the tunability of these components under the influence of DC current is very important as it allows setting the optimal performance of electronic circuits. Many dopants have been added into Mn-Zn and Ni-Zn ferrites, such as SnO2, Nb2O5, CaCO3, Co2O3, Bi2O3, SiO2, to obtain improved frequency stability and increased initial permeability and better DC bias characteristics [1][2][3][4][5][6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

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Magnetic properties of Mn-Zn ferrites under DC bias conditions

Zlebic¹,

Milutinov²,

Nikolić³

et al. 2021

Preprint

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The influence of milling time and sintering temperature on the DC bias characteristics of Mn-Zn ferrite samples were analyzed in this work. Mn-Zn ferrite powder with the chemical composition of Mn 0.63 Zn 0.37 Fe 2 O 4 - 93 wt % and Fe 2 O 3 - 7 wt % was used. Powders was additionally milled in a planetary ball mill for 1h, 2h and 4h. Green toroid shaped samples made from each of the four powders were sintered for 2 hours at maximum temperatures of 1050 o C, 1100 o C, 1200 o C, and 1300 o C. Each sample were tested under the applied DC magnetic field in the range of 0 to 500 A/m. The best DC bias characteristics under the influence of the external H DC field, was shown by samples sintered at 1050 °C and 1200 °C. With regard of milling time, the best DC bias characteristics are obtained for the starting powder samples, (ie. 0h milling time) and for the samples that are milled for 2h.

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Section: Influence Of Dc-bias Magnetic Fieldmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Magnetic properties of Mn-Zn ferrites under DC bias conditions

Zlebic¹,

Milutinov²,

Nikolić³

et al. 2021

Preprint

View full text Add to dashboard Cite

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“…Huan et al [38] observed that a NiCuZn ferrite with a better DC bias superposition characteristic can be obtained by doping SiO 2 owing to the thicker nonmagnetic grain boundary and the higher coercivity. The addition of Bi 2 O 3 , Al-B-Si glass, and SnO 2 can improve the NiCuZn ferrite DC bias superposition characteristics due to the decrease in grain size and increase in nonmagnetic grain boundary thickness [39,40]. Wang et al [41] reported that the addition of Al 2 O 3 to NiCuZn ferrites could increase the coercivity and thicken nonmagnetic grain boundary, and hence increasing the demagnetizing field and subsequently improving the DC superposition characteristics.…”

Section: Multilayer Nicuzn Ferrite Power Inductorsmentioning

confidence: 99%

Progress in materials and processes of multilayer power inductors

Hsiang

2020

J Mater Sci: Mater Electron

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Passive components have continuously improved in recent years in miniaturization, multi-functionality, performance, and energy efficiency. The requirements of portable devices, home appliances, automobiles, industrial equipment, and other products demand these improvements. The passive components used in these products have had to continuously become smaller and thinner to meet ever-higher performance requirements. During the last several years, the demand for power inductors with high-rated current has increased rapidly due to the diversification and reduction in operating voltage in portable electronic devices. The low-temperature firing NiCuZn ferrites and Fe-based alloy powders for inductors have attracted much attention in recent years, while the review of the materials and processes for multilayer power inductors has not been described in the open literature to our best knowledge. Therefore, this article is aimed to deliver an overview on the progress of the multilayer power inductors, from materials and processes' point of view.

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“…When the data points cannot converge, a new Q is chosen and the above steps are iterated until the particulate value is decided. In the fitting process, the minimum average residual square is calculated by equation (6).…”

Section: Estimation Of the Activation Energy For Sinteringmentioning

confidence: 99%

“…NiCuZn ferrites are stacked alternately with the conducting inner electrode, usually silver paste, and then co-fired to obtain monolithic structure. 2 Previous investigations on NiCuZn ferrites mainly centre on the issues: (a) improving electromagnetic properties such as the electrical resistivity, permeability, DC-bias superposition and Q-factor, etc., based on the microstructural optimisations [4][5][6] ; (b) promoting the cofiring effectiveness of NiCuZn ferrites with Ag electrode or other ceramics through using advanced sintering technique or doping an amount of additives. 7,8 Up to now, many routes to obtain ultra-fine NiCuZn ferrites have been explored, such as sol-gel method, coprecipitation, hydrothermal synthesis, spray drying and freeze-drying, etc.…”

Section: Introductionmentioning

confidence: 99%

Effects of solid-state reaction temperature on the activation energy and DC-bias superposition of NiCuZn ferrites based on master sintering curve

Ouyang

Xiao

Zhu³

et al. 2016

Advances in Applied Ceramics

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This work reports our recent studies on the microstructure and properties of NiCuZn ferrites, with particular interests in effects of solid-state reaction temperature on the sintering activation energy and DC-bias superposition characteristic. The theory of master sintering curve was used to investigate the densification evolutions of NiCuZn ferrites during sintering process. Experimental results demonstrated that materials with solid-state reaction temperature of 850°C exhibited the lowest value of activation energy, 577.6 kJ mol −1 . When the solid-state reaction temperature was lower than 800°C, reaction could not be perfectly completed, which would hinder the consolidation process during heating up. In addition, increased solid-state reaction temperature could facilitate the homogeneous grain growth, reduce the final grain size and improve DC-bias superposition characteristic. Possible mechanisms behind are discussed.

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The effect of the microstructure on the DC-bias superposition characteristic of NiCuZn ferrite

Cited by 31 publications

References 18 publications

Magnetic properties of Mn-Zn ferrites under DC bias conditions

Magnetic properties of Mn-Zn ferrites under DC bias conditions

Progress in materials and processes of multilayer power inductors

Effects of solid-state reaction temperature on the activation energy and DC-bias superposition of NiCuZn ferrites based on master sintering curve

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