CN104045334B - A kind of rare-earth ferrite core material for transformer - Google Patents
A kind of rare-earth ferrite core material for transformer Download PDFInfo
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- CN104045334B CN104045334B CN201410283974.5A CN201410283974A CN104045334B CN 104045334 B CN104045334 B CN 104045334B CN 201410283974 A CN201410283974 A CN 201410283974A CN 104045334 B CN104045334 B CN 104045334B
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Abstract
The invention discloses a kind of rare-earth ferrite core material for transformer, it comprises major ingredient and additive, does described major ingredient comprise according to mol ratio: 61.4-70? Fe2O3,16.7-20 of mol? mol? manganese oxide, 10-14.2? the zinc oxide of mol, the cupric oxide of 1-2mol, 0.4-0.6? the calcium sulfate of mol, 0.01-0.02? the rare earth compounded magnetic conductive powder of mol; Additive comprises according to the mass ratio range accounting for described ferrite core material: the chromic oxide of 40-50ppm, the zinc borate of 800-1000ppm, the rare earth compounded magnetic conductive powder magnetic energy product that 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 void content is low, crystal grain is large and uniform feature.
Description
Technical field
The present invention relates generally to oxidate magnetic material and manufactures field, particularly relates to a kind of rare-earth ferrite core material for transformer.
Background technology
Along with the communication technology and the digitized development of electronic product; new requirement is proposed to soft magnetic ferrite and element; high-performance high permeability magnetic core is widely used in each type telecommunications and information basic material, as the fields such as common-mode filter, saturation inductance, current transformer, earth leakage protective device, insulating transformer, signal and pulse transformer are widely applied.Present telecommunications industry needs FERRITE CORE to have low core loss and high magnetic permeability, and to meet the microminiaturization of present electrical equipment and high efficiency requirement, existing magnetic core is difficult to meet above-mentioned requirements;
Its magnetic energy product of the permanent magnet material that rare earth obtains can reach 150 times of carbon steel, 3 ~ 5 times of Al-Ni-Co permanent magnet material, 8 ~ 10 times of permanent-magnet ferrite, and temperature factor is low, magnetic stability, and coercive force is up to 800 kilo-amperes/rice.Be mainly used in the magnetic system of low speed torque electric motor, actuating motor, sensor, magnetic bearing etc.Nd-Fe-Bo permanent magnet material is third generation rare earth permanent-magnetic material, and its remanent magnetism, coercive force and maximum magnetic energy product are higher than the former, non-friable, and have good mechanical property, alloy density is low, is conducive to the lightness of magnetics, slimming, small-sized and subminiaturization.
Summary of the invention
The object of the invention is exactly the defect in order to make up prior art, provides a kind of rare-earth ferrite core material for transformer.
The present invention is achieved by the following technical solutions:
A kind of rare-earth ferrite core material for transformer, it comprises major ingredient and additive, and described major ingredient comprises according to mol ratio: the rare earth compounded magnetic conductive powder of the cupric oxide of the manganese oxide of Fe2O3,16.7-20 mol of 61.4-70 mol, the zinc oxide of 10-14.2 mol, 1-2mol, the calcium sulfate of 0.4-0.6 mol, 0.01-0.02 mol; Additive comprises according to the mass ratio range accounting for described ferrite core material: the chromic oxide of 40-50ppm, the zinc borate of 800-1000ppm;
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: gelatine 7-10, ferric oxide 40-50, oleic acid 2-3, fatty alcohol-polyoxyethylene ether 1-2;
Joined by gelatine in 20-30 times of water, dispersed with stirring 2-3 hour at 70-80 DEG C, ferric oxide being ground to fineness is add after 40-60 μm, and add oleic acid, fatty alcohol-polyoxyethylene ether, 600-800 rev/min of dispersed with stirring 20-30 minute, obtains premixed liquid;
Be the TriMethylolPropane(TMP) of 1-2:5-7:100, stearic acid, Neodymium trioxide mixing by mass ratio, be uniformly mixed 30-40 minute at 58-65 DEG C, add the acetic acid that concentration is 10-20%, 70-100 rev/min of dispersed with stirring 4-6 minute, add Neutral ammonium fluoride, be uniformly mixed 20-30 minute, add premixed liquid, 400-500 rev/min of dispersed with stirring 1-2 hour, dry 20-30 minute at 80-100 DEG C, send into sintering oven, sinter 4-6 hour at 300-350 DEG C, obtain described rare earth compounded magnetic conductive powder;
The mol ratio of described Neodymium trioxide, acetic acid, Neutral ammonium fluoride is 2-3:6-7:1-2;
Described ferric oxide and the mass ratio of Neodymium trioxide are 10-20:1.
For a preparation method for the rare-earth ferrite core material of transformer, comprise the following steps:
(1) above-mentioned major ingredient is sent into mixing tank, 2500-3000 rev/min is stirred mixed 2-4 hour, sends into grinding pot, being ground to fineness is 50-70 μm, add the water of major ingredient weight 20-30%, the aluminium triphosphate of 2-3%, the catechol of 1-2%, high-speed stirring mixes, and obtains slurries;
(2) additive is sent into grinding pot, add the Magnesium Stearate of weight of additive 1-2%, being ground to fineness is 60-100 μm;
(3) by each raw material mixing after above-mentioned process, stir, spraying dry, is pressed into base, sintering, obtains the described rare-earth ferrite core material for transformer.
Advantage of the present invention is:
The rare earth compounded magnetic conductive powder magnetic energy product that 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 void content is low, mechanical property is strong, and crystal grain is uniform feature greatly.
Embodiment
Embodiment 1
A kind of rare-earth ferrite core material for transformer, it is characterized in that it comprises major ingredient and additive, described major ingredient comprises according to mol ratio: the rare earth compounded magnetic conductive powder of the cupric oxide of the manganese oxide of Fe2O3,16.7mol of 61.4 mol, the zinc oxide of 14.2 mol, 1mol, the calcium sulfate of 0.6 mol, 0.02 mol; Additive comprises according to the mass ratio range accounting for described ferrite core material: the chromic oxide of 50ppm, the zinc borate of 1000ppm;
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: gelatine 10, ferric oxide 50, oleic acid 3, fatty alcohol-polyoxyethylene ether 2;
Joined by gelatine in 30 times of water, dispersed with stirring 2 hours at 80 DEG C, ferric oxide being ground to fineness is add after 60 μm, adds oleic acid, fatty alcohol-polyoxyethylene ether, and 800 revs/min of dispersed with stirring 30 minutes, obtain premixed liquid;
Be the TriMethylolPropane(TMP) of 2:7:100, stearic acid, Neodymium trioxide mixing by mass ratio, be uniformly mixed 40 minutes at 65 DEG C, add the acetic acid that concentration is 20%, 100 revs/min of dispersed with stirring 6 minutes, add Neutral ammonium fluoride, be uniformly mixed 30 minutes, add premixed liquid, 500 revs/min of dispersed with stirring 2 hours, drying 20 minutes at 100 DEG C, send into sintering oven, sinter 4 hours at 350 DEG C, obtain described rare earth compounded magnetic conductive powder;
The mol ratio of described Neodymium trioxide, acetic acid, Neutral ammonium fluoride is 2:7:2;
Described ferric oxide and the mass ratio of Neodymium trioxide are 20:1.
For a preparation method for the rare-earth ferrite core material of transformer, comprise the following steps:
(1) above-mentioned major ingredient is sent into mixing tank, 3000 revs/min are stirred mixed 2 hours, and send into grinding pot, being ground to fineness is 70 μm, adds the water of major ingredient weight 30%, the aluminium triphosphate of 2%, the catechol of 1%, and high-speed stirring mixes, and obtains slurries;
(2) additive is sent into grinding pot, add the Magnesium Stearate of weight of additive 1-2%, being ground to fineness is 100 μm;
(3) by each raw material mixing after above-mentioned process, stir, spraying dry, is pressed into base, sintering, obtains the described rare-earth 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 greater than 2700 μ i;
Maximum magnetic flux core loss (100Kc, 200mT) unit: KW/m
3: 415 (100 ± 2 DEG C);
Curie temperature is higher than 240 DEG C.
Claims (1)
1., for a rare-earth ferrite core material for transformer, it is characterized in that comprising major ingredient and additive, described major ingredient comprises according to mol ratio: the Fe of 61.4-70 part
2o
3, the manganese oxide of 16.7-20 part, the zinc oxide of 10-14.2 part, the cupric oxide of 1-2 part, the calcium sulfate of 0.4-0.6 part, the rare earth compounded magnetic conductive powder of 0.01-0.02 part;
Additive comprises according to the mass ratio range accounting for described ferrite core material: the chromic oxide of 40-50ppm, the zinc borate of 800-1000ppm;
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: gelatine 7-10, ferric oxide 40-50, oleic acid 2-3, fatty alcohol-polyoxyethylene ether 1-2; Joined by gelatine in 20-30 times of water, dispersed with stirring 2-3 hour at 70-80 DEG C, ferric oxide being ground to fineness is add after 40-60 μm, and add oleic acid, fatty alcohol-polyoxyethylene ether, 600-800 rev/min of dispersed with stirring 20-30 minute, obtains premixed liquid;
Be the TriMethylolPropane(TMP) of 1-2:5-7:100, stearic acid, Neodymium trioxide mixing by mass ratio, be uniformly mixed 30-40 minute at 58-65 DEG C, add the acetic acid that concentration is 10-20%, 70-100 rev/min of dispersed with stirring 4-6 minute, add Neutral ammonium fluoride, be uniformly mixed 20-30 minute, add premixed liquid, 400-500 rev/min of dispersed with stirring 1-2 hour, dry 20-30 minute at 80-100 DEG C, send into sintering oven, sinter 4-6 hour at 300-350 DEG C, obtain described rare earth compounded magnetic conductive powder; The mol ratio of described Neodymium trioxide, acetic acid, Neutral ammonium fluoride is 2-3:6-7:1-2; Described ferric oxide and the mass ratio of Neodymium trioxide are 10-20:1;
The preparation method of the described rare-earth ferrite core material for transformer, comprises the following steps:
(1) above-mentioned major ingredient is sent into mixing tank, 2500-3000 rev/min is stirred mixed 2-4 hour, sends into grinding pot, being ground to fineness is 50-70 μm, add the water of major ingredient weight 20-30%, the aluminium triphosphate of 2-3%, the catechol of 1-2%, high-speed stirring mixes, and obtains slurries;
(2) additive is sent into grinding pot, add the Magnesium Stearate of weight of additive 1-2%, being ground to fineness is 60-100 μm;
(3) by each raw material mixing after above-mentioned process, stir, spraying dry, is pressed into base, sintering, obtains the described rare-earth ferrite core material for transformer.
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| CN104045334B true CN104045334B (en) | 2015-10-28 |
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| 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 |
| CN104505224A (en) * | 2014-12-11 | 2015-04-08 | 安徽龙磁科技股份有限公司 | Rare-earth ferrite core material |
| CN104556998A (en) * | 2015-01-15 | 2015-04-29 | 安徽龙磁科技股份有限公司 | High-impedance magnetic core material |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103435798A (en) * | 2013-07-24 | 2013-12-11 | 中北大学 | Rare earth co-doped barium ferrite/polyaniline composite material |
| CN103833343A (en) * | 2014-03-01 | 2014-06-04 | 南通飞来福磁铁有限公司 | Nano rare-earth permanent magnet material |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103435798A (en) * | 2013-07-24 | 2013-12-11 | 中北大学 | Rare earth co-doped barium ferrite/polyaniline composite material |
| CN103833343A (en) * | 2014-03-01 | 2014-06-04 | 南通飞来福磁铁有限公司 | Nano rare-earth permanent magnet material |
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Address after: The private industrial garden of the Tongling Bridge Economic Development Zone in Tongling, Anhui Patentee after: TONGLING SANJIA TRANFORMER CO.,LTD. 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: 20230103 Address after: 244000 No. 3201, Cuihu 4th Road, Tongguan District, Tongling City, Anhui Province Patentee after: Tongling Changjiang transmission tools Co.,Ltd. Address before: The private industrial garden of the Tongling Bridge Economic Development Zone in Tongling, Anhui Patentee before: TONGLING SANJIA TRANFORMER CO.,LTD. |