Improvement on magnetic power loss of MnZn-ferrite materials by V2O5 and Nb2O5 co-doping

Chen, S.H.; Chang, Sang-Li; Tsay, Chien-Yih; Liu, K.S.; Lin, I.N.

doi:10.1016/s0955-2219(01)00145-5

Cited by 45 publications

(18 citation statements)

References 10 publications

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“…• C, total power losses of 52 mW cm −3 that is very commendable and similar to the loss levels achieved with the usage of quite sophisticated doping mixtures [1,2]. Moreover the iron and manganese oxides used as raw materials in this work were of simple industrial grade.…”

Section: Discussionsupporting

confidence: 69%

“…[1][2][3][4][5]. Additives accumulate along the grain boundaries during the elevated stage or during the cooling stage of the firing process.…”

Section: Introductionmentioning

confidence: 99%

“…E-mail: zaspalis@cperi.certh.gr additive elements [7,8]. Occasionally, niobium [1,9], vanadium [2], bismuth [3,4] or their combinations [2] and others, have been also studied.…”

Section: Introductionmentioning

confidence: 99%

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Relation Between Firing Conditions Grain Boundary Structure and Magnetic Properties in Polycrystalline MnZn-Ferrites

Zaspalis

Tsakaloudi

Papazoglou

2003

Journal of Electroceramics

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Abstract. The influence of the firing conditions on the nanoscale structure of the grain boundaries and on the magnetic properties of polycrystalline MnZn-ferrites is investigated, on specimens of nearly identical microstructures. High oxygen partial pressures favor accumulation of impurity ions at the triple points. Under appropriate oxygen pressures homogeneous accumulation of impurities along the grain boundaries may occur, revealing therefore chemically pure grains and low hysteresis losses; simultaneously an increase of the grain boundary resistivity occurs that results to low eddy current losses. Managing the raw material impurity cations towards controlled grain boundary structures leads to the synthesis of MnZn-ferrites with power losses similar to those achieved when high purity raw materials are used together with externally introduced additives.

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Section: Discussionsupporting

confidence: 69%

“…[1][2][3][4][5]. Additives accumulate along the grain boundaries during the elevated stage or during the cooling stage of the firing process.…”

Section: Introductionmentioning

confidence: 99%

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Relation Between Firing Conditions Grain Boundary Structure and Magnetic Properties in Polycrystalline MnZn-Ferrites

Zaspalis

Tsakaloudi

Papazoglou

2003

Journal of Electroceramics

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“…and Mo 6? dopants in Mn-Zn ferrites. Doping with V 5? and Nb 5? ions in microsized Mn-Zn ferrites is found [20] to result for the resistance in the vicinity of grain boundaries, which leads for higher power loss. Addition of Mo 6?…”

Section: Introductionmentioning

confidence: 99%

“…The performance of these ferrites is found [15] to be improved by doping with selective cations and grown in ultra-fine particle state. Doped ferrites with diversified field response are reported [16][17][18][19][20][21][22], especially with atoms (or ions) of distinct size and valency state. Experimental investigations of Ni-Zn ferrites are extensively reported [16][17][18] as doped with higher valency (i.e., Nb 5?…”

Section: Introductionmentioning

confidence: 99%

Experimental characterization of nanocrystalline niobium-doped nickel–zinc ferrites: occurrence of superparamagnetism

Lakshmi¹,

Sridhar

Govindraj

et al. 2016

J Mater Sci

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Structural, morphological, magnetic, and dielectric investigations are carried out in Nb-doped (viz., for x equal to 0.0-0.4 by wt%) nanocrystalline Ni-Zn ferrites synthesized by hydrothermal method. XRD, IR studies infer the growth of nano structures and Fe 2 O 3 phase. Nb ions segregate at grain boundaries. Crystallite size (D) varies from 62 to 18 nm with x. FTIR absorption exhibits split at higher x. Saturation magnetization witnesses an overall decrease with x. Trends of M s (x) are explained by nature of dopant, preferential replacement, surface canting (Y-K angles) and lattice contraction. Variations of coercive field (H c ) and D infer singledomain to multi-domain morphological transformation. Occurrence of superparamagnetism (SPM) is predicted for zeroed values of H c and for a critical concentration x crit equal to 0.321. Enhanced Nb 5? -Fe 2? binding with dopant (x up to 0.2) results for decrease in dielectric constant e 0 r , loss factor tand and increase in resistivity q. Lowered ac conductivity is attributed to blockade of path by Nb 5? ions in the vicinity of B-sites. Relatively higher q (*10 8 X cm) and lower loss (tand *10 -2 -10 -3 ) evinced for 10 kHz. Enhanced core loss is realized with x manifested as lowered H c and tand to usher their utility in high-frequency applications.

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Ferrite Inductor Cores for MH z‐Frequency Applications

Andalib¹,

Harris²

2022

Modern Ferrites

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Improvement on magnetic power loss of MnZn-ferrite materials by V2O5 and Nb2O5 co-doping

Cited by 45 publications

References 10 publications

Relation Between Firing Conditions Grain Boundary Structure and Magnetic Properties in Polycrystalline MnZn-Ferrites

Relation Between Firing Conditions Grain Boundary Structure and Magnetic Properties in Polycrystalline MnZn-Ferrites

Experimental characterization of nanocrystalline niobium-doped nickel–zinc ferrites: occurrence of superparamagnetism

Ferrite Inductor Cores for MH z‐Frequency Applications

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