CN104051106B - A kind of boron oxide based ferrite core material for transformer - Google Patents
A kind of boron oxide based ferrite core material for transformer Download PDFInfo
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- CN104051106B CN104051106B CN201410283317.0A CN201410283317A CN104051106B CN 104051106 B CN104051106 B CN 104051106B CN 201410283317 A CN201410283317 A CN 201410283317A CN 104051106 B CN104051106 B CN 104051106B
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Abstract
The invention discloses a kind of boron oxide based ferrite core material for transformer, it includes that major ingredient and additive, described major ingredient include according to mol ratio: the Fe2O3 of 58.3 65 mol, the manganese oxide of 16.3 20 mol, the zinc oxide of 11.4 15 mol, the tungstic acid of 0.1 0.2mol, the aluminum oxide of 0.2 0.3 mol, the rare earth compounded magnetic conductive powder of 0.01 0.02 mol；Additive includes according to the mass ratio range accounting for described ferrite core material: the molybdenum trioxide of 50 60ppm, the alumina silicate of 30 40ppm, the zirconium dioxide of 60 70ppm, the rare earth compounded magnetic conductive powder magnetic energy product that the ferrite core material of the present invention adds is high, magnetic stability, preparation method is simple, it is high that finished product has grain boundary resistance rate, and the porosity is low, crystal grain is big and uniform feature.
Description
Technical field
The invention mainly relates to oxidate magnetic material and manufacture field, particularly relate to a kind of boron oxide based ferrite core material for transformer.
Background technology
Along with the communication technology and the digitized development of electronic product; soft magnetic ferrite and element are proposed new requirement; high-performance high permeability magnetic core is widely used in each type telecommunications and information stock, as the fields such as common-mode filter, pulsactor, current transformer, earth leakage protective device, insulating transformer, signal and pulse transformer are widely applied.Telecommunications industry needs FERRITE CORE to have low core loss and high magnetic permeability now, and to meet the miniaturization of present electric equipment and high efficiency requirement, existing magnetic core is difficult to meet above-mentioned requirements;
Its magnetic energy product of permanent-magnet material that rare earth prepares is up to 150 times, 3～5 times of Al-Ni-Co permanent magnet material of carbon steel
, 8～10 times of permanent-magnet ferrite, temperature coefficient is low, magnetic stability, and coercivity is up to 800 kilo-amperes/rice.It is mainly used in the magnetic system of low speed torque motor, startup motor, sensor, magnetic bearing etc..Nd-Fe-B permanent magnet material is third generation rare earth permanent-magnetic material, and its remanent magnetism, coercivity and maximum magnetic energy product are higher than the former, non-friable, has preferable mechanical performance, and alloy density is low, beneficially the lightness of magnetic element, slimming, small-sized and subminaturization.
Summary of the invention
The object of the invention is contemplated to make up the defect of prior art, it is provided that a kind of boron oxide based ferrite core material for transformer.
The present invention is achieved by the following technical solutions:
A kind of boron oxide based ferrite core material for transformer, it includes that major ingredient and additive, described major ingredient include according to mol ratio: Fe2O3,16.3-20 of 58.3-65 mol
The manganese oxide of mol, 11.4-15
The zinc oxide of mol, the tungstic acid of 0.1-0.2mol, the aluminum oxide of 0.2-0.3 mol, the rare earth compounded magnetic conductive powder of 0.01-0.02 mol；Additive includes according to the mass ratio range accounting for described ferrite core material: the molybdenum trioxide of 50-60ppm, the alumina silicate of 30-40ppm, the zirconium dioxide of 60-70ppm；
The preparation of described rare earth compounded magnetic conductive powder comprises the following steps:
The preparation of premixed liquid:
Described premixed liquid is made up of the raw material of following weight parts: boron oxide 91-100, bamboo charcoal powder 3-4, sodium carboxymethylcellulose 1-2, silester 2-3, deionized water 200-300；
Being mixed with bamboo charcoal powder by boron oxide, calcine 30-40 minute at 700-800 DEG C, add silester after being cooled to normal temperature, being ground to fineness is 40-100 μm；
Sodium carboxymethylcellulose is joined in deionized water, stir；
Each raw material after above-mentioned process is mixed, 500-800 rev/min of dispersed with stirring 10-20 minute, obtain premixed liquid；
It is the trimethylolpropane of 1-2:5-7:100, stearic acid, neodymia mixing by mass ratio, stirring mixing 30-40 minute at 58-65 DEG C, adding concentration is the acetic acid of 10-20%, 70-100 rev/min of dispersed with stirring 4-6 minute, add ammonium fluoride, stirring mixing 20-30 minute, adds premixed liquid, 400-500 rev/min of dispersed with stirring 1-2 hour, it is dried 20-30 minute at 80-100 DEG C, send into sintering furnace, sinter 4-6 hour at 300-350 DEG C, obtain described rare earth compounded magnetic conductive powder；
Described neodymia, acetic acid, the mol ratio of ammonium fluoride are 2-3:6-7:1-2；
Described boron oxide is 40-60:1 with the mass ratio of neodymia.
The preparation method of a kind of boron oxide based ferrite core material for transformer, comprises the following steps:
(1) above-mentioned major ingredient being sent into blending tank, 2500-3000 rev/min of stirring mixes 2-4 hour, sends into grinding pot, and being ground to fineness is 50-70 μm, adds the water of major ingredient weight 25-30%, the sodium pyrophosphate of 2-3%, 1-2% acrylic acid, and high-speed stirred mixes, and obtains slurries；
(2) additive being sent into grinding pot, add the ATBC of weight of additive 1-2.3%, being ground to fineness is 60-100 μm；
(3) each raw material after above-mentioned process is mixed, stir, be spray-dried, be pressed into base, sintering, obtain the described boron oxide based ferrite core material for transformer.
The invention have the advantage that
The rare earth compounded magnetic conductive powder magnetic energy product that the ferrite core material of the present invention adds is high, magnetic stability, and preparation method is simple, and it is high that finished product has grain boundary resistance rate, and the porosity is low, mechanical performance is strong, crystal grain uniform feature greatly.
Detailed description of the invention
Embodiment 1
A kind of boron oxide based ferrite core material for transformer, it is characterised in that it includes that major ingredient and additive, described major ingredient include according to mol ratio: Fe2O3,16.3mol of 58.3mol
Manganese oxide, 11.4
The zinc oxide of mol, the tungstic acid of 0.2mol, the aluminum oxide of 0.3 mol, the rare earth compounded magnetic conductive powder of 0.02 mol；Additive includes according to the mass ratio range accounting for described ferrite core material: the molybdenum trioxide of 60ppm, the alumina silicate of 40ppm, the zirconium dioxide of 70ppm；
The preparation of described rare earth compounded magnetic conductive powder comprises the following steps:
The preparation of premixed liquid:
Described premixed liquid is made up of the raw material of following weight parts: boron oxide 100, bamboo charcoal powder 4, sodium carboxymethylcellulose 2, silester 2, deionized water 300；
Being mixed with bamboo charcoal powder by boron oxide, calcine 30 minutes at 800 DEG C, add silester after being cooled to normal temperature, being ground to fineness is 100 μm；
Sodium carboxymethylcellulose is joined in deionized water, stir；
Each raw material after above-mentioned process is mixed, 800 revs/min of dispersed with stirring 20 minutes, obtain premixed liquid；
It is the trimethylolpropane of 1:7:100, stearic acid, neodymia mixing by mass ratio, stirring mixing 40 minutes at 65 DEG C, adding concentration is the acetic acid of 20%, 100 revs/min of dispersed with stirring 6 minutes, add ammonium fluoride, stirring mixing 30 minutes, adds premixed liquid, 500 revs/min of dispersed with stirring 1 hour, it is dried 30 minutes at 100 DEG C, send into sintering furnace, sinter 6 hours at 350 DEG C, obtain described rare earth compounded magnetic conductive powder；
Described neodymia, acetic acid, the mol ratio of ammonium fluoride are 3:7:1；
Described boron oxide is 60:1 with the mass ratio of neodymia.
The preparation method of a kind of boron oxide based ferrite core material for transformer, comprises the following steps:
(1) above-mentioned major ingredient being sent into blending tank, 3000 revs/min of stirrings mix 2 hours, send into grinding pot, and being ground to fineness is 70 μm, add the water of major ingredient weight 30%, the sodium pyrophosphate of 3%, 2% acrylic acid, and high-speed stirred mixes, and obtains slurries；
(2) additive being sent into grinding pot, add the ATBC of weight of additive 2.3%, being ground to fineness is 100 μm；
(3) each raw material after above-mentioned process is mixed, stir, be spray-dried, be pressed into base, sintering, obtain the described boron oxide based ferrite core material for transformer.
Through detecting, the basic mechanical design feature index that the product of above-described embodiment 1 gained reaches:
The initial permeability of magnetic core of the present invention is more than 2700 μ i；
Maximum magnetic flux core loss (100Kc, 200mT) unit: KW/m3: 390(100±2℃)；
Curie temperature is higher than 240 DEG C.
Claims (2)
1. the boron oxide based ferrite core material for transformer, it is characterised in that it includes that major ingredient and additive, described major ingredient include according to mole: the Fe of 58.3-65 mol2O3, the manganese oxide of 16.3-20 mol, the zinc oxide of 11.4-15 mol, the tungstic acid of 0.1-0.2mol, the aluminum oxide of 0.2-0.3 mol, 0.01-0.02
The rare earth compounded magnetic conductive powder of mol；Additive includes according to the mass ratio range accounting for described ferrite core material: the molybdenum trioxide of 50-60ppm, the alumina silicate of 30-40ppm, the zirconium dioxide of 60-70ppm；
The preparation of described rare earth compounded magnetic conductive powder comprises the following steps:
The preparation of premixed liquid:
Described premixed liquid is made up of the raw material of following weight parts: boron oxide 91-100, bamboo charcoal powder 3-4, sodium carboxymethylcellulose 1-2, silester 2-3, deionized water 200-300；
Being mixed with bamboo charcoal powder by boron oxide, calcine 30-40 minute at 700-800 DEG C, add silester after being cooled to normal temperature, being ground to fineness is 40-100 μm；
Sodium carboxymethylcellulose is joined in deionized water, stir；
Each raw material after above-mentioned process is mixed, 500-800 rev/min of dispersed with stirring 10-20 minute, obtain premixed liquid；
It is the trimethylolpropane of 1-2:5-7:100, stearic acid, neodymia mixing by mass ratio, stirring mixing 30-40 minute at 58-65 DEG C, adding concentration is the acetic acid of 10-20%, 70-100 rev/min of dispersed with stirring 4-6 minute, add ammonium fluoride, stirring mixing 20-30 minute, adds premixed liquid, 400-500 rev/min of dispersed with stirring 1-2 hour, it is dried 20-30 minute at 80-100 DEG C, send into sintering furnace, sinter 4-6 hour at 300-350 DEG C, obtain described rare earth compounded magnetic conductive powder；
Described neodymia, acetic acid, the mol ratio of ammonium fluoride are 2-3:6-7:1-2；
Described boron oxide is 40-60:1 with the mass ratio of neodymia.
2. the preparation method of the boron oxide based ferrite core material being used for transformer as claimed in claim 1, it is characterised in that comprise the following steps:
(1) above-mentioned major ingredient being sent into blending tank, 2500-3000 rev/min of stirring mixes 2-4 hour, sends into grinding pot, and being ground to fineness is 50-70 μm, adds the water of major ingredient weight 25-30%, the sodium pyrophosphate of 2-3%, 1-2% acrylic acid, and high-speed stirred mixes, and obtains slurries；
(2) additive being sent into grinding pot, add the ATBC of weight of additive 1-2.3%, being ground to fineness is 60-100 μm；
(3) the material mixing after step (1) and step (2) being processed, stirs, is spray-dried, is pressed into base, and sintering obtains the described boron oxide based ferrite core material for transformer.
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Families Citing this family (5)
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| CN104332269A (en) * | 2014-09-28 | 2015-02-04 | 安徽欧瑞达电器科技有限公司 | Wollastonite-based ferrite core material for transformers |
| CN104361970A (en) * | 2014-10-16 | 2015-02-18 | 安徽德信电气有限公司 | Magnesium-based ferrite core material for transformer |
| CN104387048A (en) * | 2014-10-16 | 2015-03-04 | 安徽德信电气有限公司 | Tin-based ferrite magnetic core material for transformers |
| CN104926295B (en) * | 2015-05-09 | 2017-06-23 | 南通保来利轴承有限公司 | A kind of preparation method of rare-earth ferrite material |
| CN106252015A (en) * | 2016-08-17 | 2016-12-21 | 安徽德信电气有限公司 | A kind of various coil ferrite core material |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3926858A (en) * | 1973-07-13 | 1975-12-16 | Tokyo Shibaura Electric Co | Moisture sensitive element |
| CN1783362A (en) * | 2004-12-03 | 2006-06-07 | 上海宝钢天通磁业有限公司 | Method for preparing manganese-zinc-ferrite powder with superhigh magnetic conductivity |
| CN101388269A (en) * | 2008-07-11 | 2009-03-18 | 临沂中瑞电子有限公司 | Manganese zinc ferrite of high magnetic conductivity high saturation magnetic flux density high Curie temperature |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3108803B2 (en) * | 1998-08-19 | 2000-11-13 | ミネベア株式会社 | Mn-Zn ferrite |
| CN102408227B (en) * | 2011-08-19 | 2013-07-31 | 湖南阳东磁性材料有限公司 | Manganese zinc material with high magnetic permeability and sintering method thereof |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3926858A (en) * | 1973-07-13 | 1975-12-16 | Tokyo Shibaura Electric Co | Moisture sensitive element |
| CN1783362A (en) * | 2004-12-03 | 2006-06-07 | 上海宝钢天通磁业有限公司 | Method for preparing manganese-zinc-ferrite powder with superhigh magnetic conductivity |
| CN101388269A (en) * | 2008-07-11 | 2009-03-18 | 临沂中瑞电子有限公司 | Manganese zinc ferrite of high magnetic conductivity high saturation magnetic flux density high Curie temperature |
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Address after: 244000 Private Industrial Park, Tongling Bridge Economic Development Zone, Anhui, Tongling Patentee after: Tongling Sanjia transformer Polytron Technologies Inc Address before: 244000 Anhui province Tongling suburb Bridge Economic Development Private Industrial Park Patentee before: Tongling Sanjia Transformer Co., Ltd. |
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Effective date of registration: 20180320 Address after: No. 1, No. 1, No. 120, Taishan Avenue, Tongling economic and Technological Development Zone, Anhui Province Patentee after: TONGLING RUIBO ELECTRONIC TECHNOLOGY CO., LTD. Address before: 244000 Private Industrial Park, Tongling Bridge Economic Development Zone, Anhui, Tongling Patentee before: Tongling Sanjia transformer Polytron Technologies Inc |