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Soft-magnetic manganese-zinc ferrite in low wastage

A manganese-zinc ferrite, low-loss technology, applied in the field of manganese-zinc soft ferrite, high-performance soft ferrite, can solve the problems of difficult uniform dispersion of nano-scale materials, high production cost, easy agglomeration, etc., to achieve Conducive to mass production, high saturation magnetic flux density, low loss effect

Inactive Publication Date: 2005-06-15
TDG HLDG CO LTD
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  • Application Information

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Problems solved by technology

Although the manganese-zinc ferrite core of the invention has excellent performances of high frequency, high saturation magnetic flux density and low magnetic loss, its production cost is relatively high because of the use of nanoscale oxides as additives, and in the production process Nanoscale materials are extremely difficult to disperse evenly (nanomaterials are easy to agglomerate)

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  • Soft-magnetic manganese-zinc ferrite in low wastage
  • Soft-magnetic manganese-zinc ferrite in low wastage
  • Soft-magnetic manganese-zinc ferrite in low wastage

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Embodiment Construction

[0023] As shown in Figure 1, the main component formula of MnZn ferrite material is 53.2mol% Fe 2 o 3 , 35.8mol% of MnO, 11mol% of ZnO, low-valent oxide CaCO in the main component 3 (1000ppm) doping makes the temperature of the lowest loss point move to the high temperature direction, and the high-valent oxide SnO 2 The doping of (1000ppm) makes the temperature of the lowest point of loss move to the low temperature direction, and it also shows that the doping of low-valent oxides can make Fe 2+ Reduction, the incorporation of high-valent oxides can make Fe 2+ Increase.

[0024] As shown in Figure 2, the main ingredient formula is Fe 2 o 3 --53.0mol%, MnO--37.0mol%, ZnO--10.0mol%. The lower curve represents the use of secondary doping technology, that is, in the main component Fe 2 o 3 , MnO, ZnO once sanding, doped with SnO 2 3000ppm. And pre-fired at 950°C after drying and granulating, and then added 300ppm of Nb when it was finely ground by the second sand mill af...

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Abstract

Major converted components of soft-magnetic manganese-zinc ferrite in low wastage are as follows: 52.7-53.6 mol% Fe2O3, 8.5-11.8 mol% ZnO and MnO as the rest. At least one of following component: 1000-8000ppm SnO2, 500-2000ppm CaCO3, 300-1500ppm V2O5 is added into the major components. After major components and additive are mixed and preburning, second adulteration is carried out in pulverizing operation. Admixing additive includes at least two kinds of materials from Nb2O5, K2O, CaCO3, Ta2O5, SnO2, and V2O5. Total add on is between 800-1200ppm. Features of the disclosed ferrite are higher operation frequency, low loss, and higher saturation flux density.

Description

technical field [0001] The invention relates to a manganese-zinc soft ferrite, in particular a high-performance soft ferrite with high operating frequency, low magnetic loss and high magnetic flux density, and belongs to the technical field of oxide magnetic materials. Background technique [0002] With the development of communication technology, electronic devices tend to be miniaturized, light-weight and high-frequency operating frequency, the driving frequency of the power transformer has risen from about 25KHZ to 100-500KHZ range, this pair of soft magnetic MnZn power ferrite core The performance puts forward higher requirements, requiring power ferrite high frequency and low loss, and the loss requirement at 100KHZ / 200mT is 300mW / cm 3 At the same time, the material is required to have a higher saturation magnetic flux density. [0003] In the prior art, the patent application No. 02138280.8 proposes a manganese-zinc ferrite whose main component formula is optimized, a...

Claims

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Application Information

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IPC IPC(8): H01F1/34
Inventor 彭声谦吴耀杰
Owner TDG HLDG CO LTD
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