CN104058739B - Tantalum-based ferrite magnetic core material used for transformer - Google Patents
Tantalum-based ferrite magnetic core material used for transformer Download PDFInfo
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- CN104058739B CN104058739B CN201410285184.0A CN201410285184A CN104058739B CN 104058739 B CN104058739 B CN 104058739B CN 201410285184 A CN201410285184 A CN 201410285184A CN 104058739 B CN104058739 B CN 104058739B
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Abstract
The invention discloses a tantalum-based ferrite magnetic core material used for transformer, which comprises a main material and an additive, the main material comprises the following components according to mol ratio: 57.1-64mol of Fe2O3, 16.2-20mol of manganese oxide, 10.1-15mol of zinc oxide, 4-5.2mol of copper oxide, 0.2-1 mol of zinc borate, 1-1.3mol of barium oxide and 0.01-0.02mol of rare earth composite magnetic conductive powder; and the additive comprises the following components according to weight ratio of the additive in the ferrite magnetic core material: 30-50ppm of aluminium triphosphate, 10-20ppm of titanium tetrachloride and 40-50ppm of silicon powder. The magnetic energy product of the rare earth composite magnetic conductive powder in the ferrite magnetic core material is high, and magnetic performance is stable, preparation method is simple, and the finished product has the characteristics of high crystal boundary resistivity, low porosity and large crystal grain.
Description
Technical field
The present invention relates generally to oxidate magnetic material and manufactures field, particularly relates to a kind of tantalum based 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 tantalum based ferrite core material for transformer.
The present invention is achieved by the following technical solutions:
A kind of tantalum based ferrite core material for transformer, it comprises major ingredient and additive, and described major ingredient comprises according to mol ratio: the cupric oxide of the manganese oxide of Fe2O3,16.2-20 mol of 57.1-64 mol, the zinc oxide of 10.1-15 mol, 4-5.2mol, the zinc borate of 0.2-1mol, the barium oxide of 1-1.3 mol, the rare earth compounded magnetic conductive powder of 0.01-0.02 mol; Additive comprises according to the mass ratio range accounting for described ferrite core material: the silicon powder of the aluminium triphosphate of 30-50ppm, the titanium tetrachloride of 10-20ppm, 40-50ppm;
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:
Tantalum oxide 91-100, polyvinyl butyral acetal 1-2, paregal O 1-2, tetramethylolmethane 2-3, triglycerin fatty acid ester 2-3, deionized water 300-400;
By polyvinyl butyral acetal thermoplastic, add tantalum oxide, be uniformly mixed 3-5 minute, add triglycerin fatty acid ester, continue to be uniformly mixed 2-4 minute;
Paregal O is joined in deionized water, after stirring, add tetramethylolmethane, insulated and stirred 3-6 minute at 50-60 DEG C;
By each raw material mixing after above-mentioned process, 600-1000 rev/min of dispersed with stirring 10-20 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 tantalum oxide and the mass ratio of Neodymium trioxide are 100-110:1.
For a preparation method for the tantalum based ferrite core material of transformer, comprise the following steps:
(1) each raw material in above-mentioned major ingredient except rare earth compounded magnetic conductive powder is sent into mixing tank, 2500-3000 rev/min is stirred mixed 2-3 hour, send into rotary kiln pre-burning, pre-burning 2-3 hour at 350-400 DEG C, send into grinding pot, add rare earth compounded magnetic conductive powder, being ground to fineness is 60-80 μm;
(2) additive is sent into grinding pot, add the acrylate of weight of additive 0.8-1%, the Xylo-Mucine of 0.5-1%, being ground to fineness is 50-70 μm;
(3) by each raw material mixing after above-mentioned process, add six ammonium molybdates of the water of compound weight 20-30%, 1-2%, at 60-70 DEG C, be uniformly mixed 20-30 minute;
(4) spraying dry, is pressed into base, sintering, obtains the described tantalum based 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 tantalum based 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 zinc borate of the zinc oxide of the Fe2O3 of 57.1 mol, the manganese oxide of 16.2 mol, 10.1 mol, the cupric oxide of 5.2mol, 0.2mol, the barium oxide of 1.3 mol, the rare earth compounded magnetic conductive powder of 0.02 mol; Additive comprises according to the mass ratio range accounting for described ferrite core material: the silicon powder of the aluminium triphosphate of 50ppm, the titanium tetrachloride of 20ppm, 50ppm;
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:
Tantalum oxide 100, polyvinyl butyral acetal 2, paregal O 2, tetramethylolmethane 3, triglycerin fatty acid ester 2, deionized water 400;
By polyvinyl butyral acetal thermoplastic, add tantalum oxide, be uniformly mixed 5 minutes, add triglycerin fatty acid ester, continue to be uniformly mixed 2-4 minute;
Paregal O is joined in deionized water, after stirring, add tetramethylolmethane, insulated and stirred 3 minutes at 60 DEG C;
By each raw material mixing after above-mentioned process, 1000 revs/min of dispersed with stirring 20 minutes, obtain premixed liquid;
Be the TriMethylolPropane(TMP) of 2:5:100, stearic acid, Neodymium trioxide mixing by mass ratio, be uniformly mixed 40 minutes at 65 DEG C, add the acetic acid that concentration is 10-20%, 100 revs/min of dispersed with stirring 4 minutes, add Neutral ammonium fluoride, be uniformly mixed 30 minutes, add premixed liquid, 500 revs/min of dispersed with stirring 1 hour, drying 30 minutes at 80-100 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 3:7:1;
Described tantalum oxide and the mass ratio of Neodymium trioxide are 110:1.
For a preparation method for the tantalum based ferrite core material of transformer, comprise the following steps:
(1) each raw material in above-mentioned major ingredient except rare earth compounded magnetic conductive powder is sent into mixing tank, 3000 revs/min are stirred mixed 2-3 hour, send into rotary kiln pre-burning, pre-burning 2-3 hour at 400 DEG C, send into grinding pot, add rare earth compounded magnetic conductive powder, being ground to fineness is 80 μm;
(2) additive is sent into grinding pot, add the acrylate of weight of additive 0.8%, the Xylo-Mucine of 0.5%, being ground to fineness is 70 μm;
(3) by each raw material mixing after above-mentioned process, add the water of compound weight 20-30%, 1% six ammonium molybdates, at 70 DEG C, be uniformly mixed 30 minutes;
(4) spraying dry, is pressed into base, sintering, obtains the described tantalum 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 greater than 2700 μ i;
Maximum magnetic flux core loss (100Kc, 200mT) unit: KW/m
3: 389 (100 ± 2 DEG C);
Curie temperature is higher than 240 DEG C.
Claims (2)
1., for a tantalum based ferrite core material for transformer, it is characterized in that it comprises major ingredient and additive, described major ingredient comprises according to mole number: the Fe of 57.1-64 mol
2o
3, the manganese oxide of 16.2-20 mol, the zinc oxide of 10.1-15 mol, the cupric oxide of 4-5.2mol, the zinc borate of 0.2-1mol, the barium oxide of 1-1.3 mol, the rare earth compounded magnetic conductive powder of 0.01-0.02 mol; Additive comprises according to the mass ratio range accounting for described ferrite core material: the silicon powder of the aluminium triphosphate of 30-50ppm, the titanium tetrachloride of 10-20ppm, 40-50ppm;
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:
Tantalum oxide 91-100, polyvinyl butyral acetal 1-2, paregal O 1-2, tetramethylolmethane 2-3, triglycerin fatty acid ester 2-3, deionized water 300-400;
By polyvinyl butyral acetal thermoplastic, add tantalum oxide, be uniformly mixed 3-5 minute, add triglycerin fatty acid ester, continue to be uniformly mixed 2-4 minute;
Paregal O is joined in deionized water, after stirring, add tetramethylolmethane, insulated and stirred 3-6 minute at 50-60 DEG C;
By each raw material mixing after above-mentioned process, 600-1000 rev/min of dispersed with stirring 10-20 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 tantalum oxide and the mass ratio of Neodymium trioxide are 100-110:1.
2., as claimed in claim 1 for a preparation method for the tantalum based ferrite core material of transformer, it is characterized in that comprising the following steps:
(1) each raw material in above-mentioned major ingredient except rare earth compounded magnetic conductive powder is sent into mixing tank, 2500-3000 rev/min is uniformly mixed 2-3 hour, send into rotary kiln pre-burning, pre-burning 2-3 hour at 350-400 DEG C, send into grinding pot, add rare earth compounded magnetic conductive powder, being ground to fineness is 60-80 μm;
(2) additive is sent into grinding pot, add the acrylate of weight of additive 0.8-1%, the Xylo-Mucine of 0.5-1%, being ground to fineness is 50-70 μm;
(3) by each raw material mixing after above-mentioned process, add six ammonium molybdates of the water of compound weight 20-30%, 1-2%, at 60-70 DEG C, be uniformly mixed 20-30 minute;
(4) spraying dry, is pressed into base, sintering, obtains the described tantalum based ferrite core material for transformer.
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| CN105060874A (en) * | 2015-08-10 | 2015-11-18 | 天长市昭田磁电科技有限公司 | Manganese zinc ferrite material for increasing electrical resistivity |
| CN108147804A (en) * | 2017-12-25 | 2018-06-12 | 日照亿鑫电子材料有限公司 | A kind of zirconium base rare earth ferromagnetic core material |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101266859A (en) * | 2008-01-08 | 2008-09-17 | 上海大学 | Method for quick sintering of micro-crystal ferrite magnetic core part |
| CN103382104A (en) * | 2013-06-26 | 2013-11-06 | 蚌埠市高华电子有限公司 | Rare-earth-doped soft-magnetic ferrite and preparation method thereof |
| CN103382101A (en) * | 2013-06-26 | 2013-11-06 | 蚌埠市高华电子有限公司 | Rare-earth soft-magnetic ferrite with high magnetic permeability and preparation method thereof |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101266859A (en) * | 2008-01-08 | 2008-09-17 | 上海大学 | Method for quick sintering of micro-crystal ferrite magnetic core part |
| CN103382104A (en) * | 2013-06-26 | 2013-11-06 | 蚌埠市高华电子有限公司 | Rare-earth-doped soft-magnetic ferrite and preparation method thereof |
| CN103382101A (en) * | 2013-06-26 | 2013-11-06 | 蚌埠市高华电子有限公司 | Rare-earth soft-magnetic ferrite with high magnetic permeability and preparation method thereof |
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Address after: No. 10 workshop of Linquan County Industrial Park, Fuyang, Anhui Patentee after: Anhui Wan Hong electrical equipment Limited by Share Ltd Address before: No. 10 workshop of Linquan County Industrial Park, Fuyang, Anhui Patentee before: The grand Electric Appliance Equipment Co., Ltd of Anhui Province |
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Address after: 236400 factory building, 10 industrial park, Linquan County, Fuyang, Anhui Patentee after: Anhui Wanhong Electric Co.,Ltd. Address before: 236400 factory building, 10 industrial park, Linquan County, Fuyang, Anhui Patentee before: ANHUI WANHONG ELECTRIC EQUIPMENT Co.,Ltd. |
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Denomination of invention: Tantalum based ferrite core material for transformer Effective date of registration: 20201229 Granted publication date: 20150624 Pledgee: China Postal Savings Bank Limited by Share Ltd. Linquan branch Pledgor: Anhui Wanhong Electric Co.,Ltd. Registration number: Y2020980010073 |
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