CN104557001A - Low-magnetic loss ferrite magnetic core material - Google Patents
Low-magnetic loss ferrite magnetic core material Download PDFInfo
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- CN104557001A CN104557001A CN201510019918.5A CN201510019918A CN104557001A CN 104557001 A CN104557001 A CN 104557001A CN 201510019918 A CN201510019918 A CN 201510019918A CN 104557001 A CN104557001 A CN 104557001A
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Abstract
The invention discloses a low-magnetic loss ferrite magnetic core material, which mainly comprises main materials and additives, wherein the main materials comprise the following raw materials by molar ratio: 65.4-67mol of Fe2O3, 15.1-21mol of manganese oxide, 11.7-14.7mol of zinc oxide, 0.1-0.2mol of tungsten powder, 3-4.5mol of manganese oxide and 0.01-0.02mol of tin-coated carbonyl iron powder; and the additives comprise 500-600ppm of molybdenum oxide, 200-500ppm of zirconium oxide, 10-40ppm of diamond powder and 200-300ppm of vanadium pentoxide. The tin-coated carbonyl iron powder added to the ferrite magnetic core material disclosed by the invention has high magnetic flux rate at a high frequency and an ultrahigh frequency; the comprehensive properties of the product are further improved; and the magnetic core material disclosed by the invention has the characteristics of high magnetic energy product, stable magnetism and high mechanical property and the like.
Description
Technical field
The present invention relates generally to oxidate magnetic material and manufactures field, particularly relates to a kind of low magnetic loss ferrite core material.
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 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.Present telecommunications industry needs FERRITE CORE to have low core loss and high magnetic permeability, and to meet the microminiaturization of present electric equipment and high efficiency requirement, existing magnetic core is difficult to meet above-mentioned requirements;
Carbonyl iron dust has granularity little (below 10um), active large, the characteristics such as out-of-shape, and carbonyl iron dust has the high magnetic flux rate under high frequency and hyperfrequency, is also widely used in manufacturing magnetic material, in making magicore, have irreplaceable effect.
Summary of the invention
The object of the invention is exactly the defect in order to make up prior art, provides a kind of low magnetic loss ferrite core material.
The present invention is achieved by the following technical solutions:
A kind of low magnetic loss ferrite core material, it comprises major ingredient and additive, and described major ingredient comprises according to mol ratio: the tungsten powder of the manganese oxide of Fe2O3,15.1-21 mol of 65.4-67 mol, the zinc oxide of 11.7-14.7 mol, 0.1-0.2mol, the manganese oxide of 3-4.5 mol, the tin coating carbonyl iron powder of 0.01-0.02 mol; Additive comprises according to the mass ratio range accounting for described ferrite core material: the molybdenum oxide of 500-600ppm, the zirconia of 200-500ppm, the bortz powder of 10-40ppm, the vanadic oxide of 200-300ppm;
The preparation of described tin coating carbonyl iron powder comprises the following steps:
(1) preparation of premixed liquid:
Described premixed liquid is made up of the raw material of following weight parts:
Stannous pyrophosphate 30-37, two mercapto propanesulfonate 1-2, chlorinated paraffin wax 3-5, borax 2-4, triacetin 1-2, deionized water 90-100;
Chlorinated paraffin wax is heated to 60-70 DEG C, adds borax, insulated and stirred mixing 3-5 minute, adds triacetin, is stirred to normal temperature;
Two mercapto propanesulfonates are joined in deionized water, adds stannous pyrophosphate after stirring, stir;
By each raw material mixing after above-mentioned process, 200-300 rev/min of dispersed with stirring 4-6 minute, obtains described premixed liquid;
(2) by mass ratio be the silester of 15-20:2-3:6-10, trimethylolpropane, aluminium dihydrogen phosphate mixing, 10-20 minute is uniformly mixed at 60-70 DEG C, add the ethanol that concentration is 60-70%, 300-400 rev/min of dispersed with stirring 7-10 minute, obtains silica-alumina gel; Add carbonyl iron dust, drip the ammoniacal liquor that concentration is 20-30%, after dropwising, add premixed liquid under stirring condition, 600-800 rev/min of dispersed with stirring 40-50 minute, dry 20-40 minute at 100-120 DEG C, obtains tin coating carbonyl iron powder;
The mass ratio of the ammoniacal liquor that in above-mentioned steps, described concentration is the ethanol of 60-70%, carbonyl iron dust, concentration are 20-30%, aluminium dihydrogen phosphate, stannous pyrophosphate is 200:100-120:5-20:6-10:10-20.
2, a preparation method for low magnetic loss ferrite core material as claimed in claim 1, is characterized in that comprising the following steps:
(1) raw material each in above-mentioned major ingredient except tin coating carbonyl iron powder is sent into blending tank, add the manganese sulfate of major ingredient weight 0.2-0.3%, 2600-3000 rev/min is stirred mixed 2-4 hour, send into grinding pot, being ground to fineness is 50-70 μm, add tin coating carbonyl iron powder, the water of major ingredient weight 25-30%, the lauric acid amide of ethanol of 0.1-0.3%, the sodium metasilicate of 0.4-1%, high-speed stirred mixes, and obtains slurries;
(2) additive is sent into grinding pot, add the alum powder of weight of additive 0.6-1%, the pentaerythrite of 0.2-0.5%, 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, and sintering, obtains described low magnetic loss ferrite core material.
Advantage of the present invention is:
The boric acid that premixed liquid of the present invention adds and stannous pyrophosphate, effectively can improve the emulsifiability of premixed liquid, promotes grinding effect, improves product intensity.
The tin coating carbonyl iron powder that ferrite core material of the present invention adds has the high magnetic flux rate under high frequency and hyperfrequency, further improves the combination property of finished product, the features such as it is high that core material of the present invention has magnetic energy product, magnetic stability, and mechanical performance is strong.
Embodiment
Embodiment 1
A kind of low magnetic loss ferrite core material, it is characterized in that it comprises major ingredient and additive, described major ingredient comprises according to mol ratio: the zinc oxide of the Fe2O3 of 65.4 mol, the manganese oxide of 15.1 mol, 14.7 mol, the tungsten powder of 0.2mol, the manganese oxide of 4.5 mol, the tin coating carbonyl iron powder of 0.02 mol; Additive comprises according to the mass ratio range accounting for described ferrite core material: the molybdenum oxide of 600ppm, the zirconia of 500ppm, the bortz powder of 40ppm, the vanadic oxide of 300ppm;
The preparation of described tin coating carbonyl iron powder comprises the following steps:
(1) preparation of premixed liquid:
Described premixed liquid is made up of the raw material of following weight parts:
Stannous pyrophosphate 37, two mercapto propanesulfonate 2, chlorinated paraffin wax 3, borax 4, triacetin 1-2, deionized water 100;
Chlorinated paraffin wax is heated to 70 DEG C, adds borax, insulated and stirred mixes 5 minutes, adds triacetin, is stirred to normal temperature;
Two mercapto propanesulfonates are joined in deionized water, adds stannous pyrophosphate after stirring, stir;
By each raw material mixing after above-mentioned process, 300 revs/min of dispersed with stirring 6 minutes, obtain described premixed liquid;
(2) be the silester of 20:3:10, trimethylolpropane, aluminium dihydrogen phosphate mixing by mass ratio, be uniformly mixed 20 minutes, add the ethanol that concentration is 60-70% at 70 DEG C, 400 revs/min of dispersed with stirring 10 minutes, obtain silica-alumina gel; Add carbonyl iron dust, drip the ammoniacal liquor that concentration is 30% under stirring condition, after dropwising, add premixed liquid, 600-800 rev/min of dispersed with stirring 40 minutes, at 120 DEG C dry 40 minutes, obtain tin coating carbonyl iron powder;
In above-mentioned steps, the mass ratio of the ammoniacal liquor that the ethanol that described concentration is 70%, carbonyl iron dust, concentration are 30%, aluminium dihydrogen phosphate, stannous pyrophosphate is 200:120-20:10:20.
A preparation method for low magnetic loss ferrite core material as claimed in claim 1, is characterized in that comprising the following steps:
(1) raw material each in above-mentioned major ingredient except tin coating carbonyl iron powder is sent into blending tank, add the manganese sulfate of major ingredient weight 0.3%, 3000 revs/min are stirred mixed 2-4 hour, send into grinding pot, being ground to fineness is 70 μm, add tin coating carbonyl iron powder, the water of major ingredient weight 25-30%, the lauric acid amide of ethanol of 0.3%, the sodium metasilicate of 0.4%, high-speed stirred mixes, and obtains slurries;
(2) additive is sent into grinding pot, add the alum powder of weight of additive 0.6%, the pentaerythrite of 0.5%, being ground to fineness is 60 μm;
(3) by each raw material mixing after above-mentioned process, stir, spraying dry, is pressed into base, and sintering, obtains described low magnetic loss ferrite core material.
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 3600 μ i;
Maximum magnetic flux core loss (100Kc, 200mT) unit: KW/m
3: 395 (100 ± 2 DEG C);
Curie temperature is higher than 240 DEG C.
Claims (2)
1. one kind low magnetic loss ferrite core material, it is characterized in that it comprises major ingredient and additive, described major ingredient comprises according to mol ratio: the tungsten powder of the manganese oxide of Fe2O3,15.1-21 mol of 65.4-67 mol, the zinc oxide of 11.7-14.7 mol, 0.1-0.2mol, the manganese oxide of 3-4.5 mol, the tin coating carbonyl iron powder of 0.01-0.02 mol; Additive comprises according to the mass ratio range accounting for described ferrite core material: the molybdenum oxide of 500-600ppm, the zirconia of 200-500ppm, the bortz powder of 10-40ppm, the vanadic oxide of 200-300ppm;
The preparation of described tin coating carbonyl iron powder comprises the following steps:
(1) preparation of premixed liquid:
Described premixed liquid is made up of the raw material of following weight parts:
Stannous pyrophosphate 30-37, two mercapto propanesulfonate 1-2, chlorinated paraffin wax 3-5, borax 2-4, triacetin 1-2, deionized water 90-100;
Chlorinated paraffin wax is heated to 60-70 DEG C, adds borax, insulated and stirred mixing 3-5 minute, adds triacetin, is stirred to normal temperature;
Two mercapto propanesulfonates are joined in deionized water, adds stannous pyrophosphate after stirring, stir;
By each raw material mixing after above-mentioned process, 200-300 rev/min of dispersed with stirring 4-6 minute, obtains described premixed liquid;
(2) by mass ratio be the silester of 15-20:2-3:6-10, trimethylolpropane, aluminium dihydrogen phosphate mixing, 10-20 minute is uniformly mixed at 60-70 DEG C, add the ethanol that concentration is 60-70%, 300-400 rev/min of dispersed with stirring 7-10 minute, obtains silica-alumina gel; Add carbonyl iron dust, drip the ammoniacal liquor that concentration is 20-30%, after dropwising, add premixed liquid under stirring condition, 600-800 rev/min of dispersed with stirring 40-50 minute, dry 20-40 minute at 100-120 DEG C, obtains tin coating carbonyl iron powder;
The mass ratio of the ammoniacal liquor that in above-mentioned steps, described concentration is the ethanol of 60-70%, carbonyl iron dust, concentration are 20-30%, aluminium dihydrogen phosphate, stannous pyrophosphate is 200:100-120:5-20:6-10:10-20.
2. a preparation method for low magnetic loss ferrite core material as claimed in claim 1, is characterized in that comprising the following steps:
(1) raw material each in above-mentioned major ingredient except tin coating carbonyl iron powder is sent into blending tank, add the manganese sulfate of major ingredient weight 0.2-0.3%, 2600-3000 rev/min is stirred mixed 2-4 hour, send into grinding pot, being ground to fineness is 50-70 μm, add tin coating carbonyl iron powder, the water of major ingredient weight 25-30%, the lauric acid amide of ethanol of 0.1-0.3%, the sodium metasilicate of 0.4-1%, high-speed stirred mixes, and obtains slurries;
(2) additive is sent into grinding pot, add the alum powder of weight of additive 0.6-1%, the pentaerythrite of 0.2-0.5%, 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, and sintering, obtains described low magnetic loss ferrite core material.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105070449A (en) * | 2015-08-10 | 2015-11-18 | 天长市昭田磁电科技有限公司 | Low-temperature sintered iron-based magnetic core material |
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| CN1492453A (en) * | 2002-10-25 | 2004-04-28 | 上海华源磁业有限公司 | High frequency low loss soft magnetic ferrite magnetic core material |
| CN1492454A (en) * | 2002-10-25 | 2004-04-28 | 上海华源磁业有限公司 | High magnetoconductivity magnetic ferrite magnetic core material |
| CN1895820A (en) * | 2006-05-19 | 2007-01-17 | 江苏天一超细金属粉末有限公司 | Production of nano-SiO2 for coating carbonyl iron powder |
| CN102674821A (en) * | 2011-12-01 | 2012-09-19 | 上海康顺磁性元件厂有限公司 | Method for preparing Mn-Zn soft magnetic power ferrite core material |
| CN104051109A (en) * | 2014-06-24 | 2014-09-17 | 铜陵三佳变压器有限责任公司 | Molybdenum-based ferrite core material used for transformer |
| CN104045337A (en) * | 2014-06-24 | 2014-09-17 | 铜陵三佳变压器有限责任公司 | Vanadium-based ferrite core material for transformer |
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2015
- 2015-01-15 CN CN201510019918.5A patent/CN104557001A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1492453A (en) * | 2002-10-25 | 2004-04-28 | 上海华源磁业有限公司 | High frequency low loss soft magnetic ferrite magnetic core material |
| CN1492454A (en) * | 2002-10-25 | 2004-04-28 | 上海华源磁业有限公司 | High magnetoconductivity magnetic ferrite magnetic core material |
| CN1895820A (en) * | 2006-05-19 | 2007-01-17 | 江苏天一超细金属粉末有限公司 | Production of nano-SiO2 for coating carbonyl iron powder |
| CN102674821A (en) * | 2011-12-01 | 2012-09-19 | 上海康顺磁性元件厂有限公司 | Method for preparing Mn-Zn soft magnetic power ferrite core material |
| CN104051109A (en) * | 2014-06-24 | 2014-09-17 | 铜陵三佳变压器有限责任公司 | Molybdenum-based ferrite core material used for transformer |
| CN104045337A (en) * | 2014-06-24 | 2014-09-17 | 铜陵三佳变压器有限责任公司 | Vanadium-based ferrite core material for transformer |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105070449A (en) * | 2015-08-10 | 2015-11-18 | 天长市昭田磁电科技有限公司 | Low-temperature sintered iron-based magnetic core material |
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