CN102531560A - Magnetism, copper and zinc-iron soft magnetic ferrite material and preparation method thereof - Google Patents
Magnetism, copper and zinc-iron soft magnetic ferrite material and preparation method thereof Download PDFInfo
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- CN102531560A CN102531560A CN2011104511572A CN201110451157A CN102531560A CN 102531560 A CN102531560 A CN 102531560A CN 2011104511572 A CN2011104511572 A CN 2011104511572A CN 201110451157 A CN201110451157 A CN 201110451157A CN 102531560 A CN102531560 A CN 102531560A
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Abstract
The invention discloses a magnetism, copper and zinc-iron soft magnetic ferrite material and a preparation method thereof. Formula of main components by mole percentage comprises ferric oxide, zinc oxide, magnesium oxide and copper oxide. First assistant components of doping agents comprise one of or mixture of several of components of calcium carbonate or cobalt oxide or silicon dioxide. Second assistant components of the doping agents comprise one of or mixture of any two or three of components of vanadium pentoxide or bismuth oxide or lithium carbonate. The preparation method includes primary ball-milling, presintering, secondary ball-milling, forming and sintering. Then a blank part is placed in a sintering furnace for sintering, four-hour heat preservation at temperature of 1250 DEG C is carried out, and a finished magnetic core is obtained. Technical performance of the magnetism, copper and zinc-iron soft magnetic ferrite material is the same as that of nickel zinc ferrite, and rod-shaped, I-shaped and annular-shaped magnetic cores manufactured by the preparation method have large cost advantages.
Description
Technical field
The present invention relates to the technical field of soft magnetic ferrite and preparation.
Background technology
Ferrite Material is claimed oxidate magnetic material again, and the composite oxides that it is made up of iron and other metal, soft magnetic ferrite mainly contain that MnZn is, NiZn (NiCuZn) is, MgZn (MgCuZn) is a three major types.
The MnZn based ferrite has high initial permeability, and higher saturation induction density has low loss at wireless intermediate frequency or low-frequency range, and it is the Ferrite Material of the following band limits magnetic property of 1 meps most excellent.MnZn based ferrite initial permeability μ i=400-20000 commonly used, saturation induction density Bs=400-530mT.
NiZn (NiCuZn) based ferrite frequency of utilization 100kHz～100MHz, the highest 300MHz that uses.This type material magnetic permeability is lower, and resistivity is very high, is generally 105～107 Ω cm.Therefore, the high-frequency vortex loss is little, is the above high band magnetic property of 1MHz most excellent material.The magnetic permeability μ i=5-1500 of NiZn based material commonly used, saturation induction density Bs=250-400mT.
The resistivity of MgZn (MgCuZn) series ferrite material is higher, is mainly used in the deflector coil magnetic core of making picture tube or typotron.
Soft magnetic materials select for use principle to select soft magnetic materials for use the time mainly take all factors into consideration following factor: (1) frequency of utilization scope, magnetic permeability (initial permeability, amplitude permeability, incremental permeability), saturation induction are strong, residual magnetic flux density, spillage of material, temperature factor, resistivity, magnetic hysteresis coefficient of dilatation, Tc, use temperature scope.
So the ferrite of unlike material is difficult to replace use and also guarantees its performance.
Along with global metal price broken height enterprise not, the price that soft magnetic ferrite is produced necessary various MOXs also rises steadily.Manufacturing enterprise faces increasing cost pressure.The market price of the main material nickel protoxide of nickel-zinc ferrite increases to the highest 16 just in case ton by 4-5 contingency ton.Seeking equivalent material becomes enterprise and reduces cost the target of enhancing competitiveness.
Come the replacement nickel Zn ferrite to become a kind of inevitable choice with MgZn ferrite.But comparing with nickel-zinc ferrite, common MgZn ferrite has several defectives.The one, be suitable for frequency, below the general only suitable 20MHz of MgZn ferrite, more than the frequency, its characteristic attenuation is obvious at this, is difficult to compare with nickel zinc.The 2nd, dc superposition characteristic is lower.The 3rd, physical strength does not have the Ni Zn ferrimagnet height.Above defective causes the MgZn ferrite application limit excessive.
Summary of the invention
The invention provides a kind of magnesium copper Zn soft magnetic ferrite material and preparation method thereof, specifically is a kind of have good high frequency characteristics, high DC stacked characteristic and good mechanical strength, the MgZn ferrite material of complete alternative nickel-zinc ferrite.
In order to solve above technical problem, a kind of magnesium copper zinc-iron soft magnetic ferrite of the present invention is characterized in that: the principal constituent prescription is by mole per-cent; Calculate with oxide compound: red stone: 48-53mol%; Zinc oxide 14-25 mol%, Natural manganese dioxide 20-30 mol%, cupric oxide 1-4mol%; Doping agent first side ingredient: a kind of or any two kinds mixing in lime carbonate or powder blue or the silicon-dioxide, addition are 200-1000ppm; Second side ingredient: the mixing of a kind of or any two kinds and three kinds in Vanadium Pentoxide in FLAKES or bismuth oxide or the Quilonum Retard, addition by weight, calculate with oxide compound, add 0.1-1wt%.
In order to realize above-mentioned Ferrite Material, the present invention also provides a kind of preparation method of magnesium copper Zn soft magnetic ferrite material,
1), press red stone: 48-53mol%, zinc oxide 14-25 mol%, Natural manganese dioxide 20-30 mol%, cupric oxide 1-4mol% joins major ingredient, additive is pressed any portion that massfraction adds doping agent first side ingredient or second side ingredient;
2), ball milling: the material vibromill that will prepare mixed 1 hour, and the material powder is mixed;
3), pre-burning: with step 2) material of gained is in 1050 ℃ temperature, constant temperature pre-burning in 3 hours;
4), secondary ball milling: ball milling for the first time: after the pre-burning cooling, with vibromill secondary vibration ball milling, 1 hour time.The material of pre-burning is tentatively pulverized, and particle diameter reaches 1-10 μ m.Ball milling for the second time: sand mill adds water, and pulp density in the step 3) is controlled at 65%, and sand milling 2 hours obtains the slip of granularity at 1.0-1.5 μ m;
5), moulding: in the material of step 4), add the PVA solution of concentration 10 wt%, add-on is 15% of a dry powder weight.Add the n-Octanol skimmer, add-on is the 0.2-0.3% of dry powder weight.Add and gather the propionic acid dispersion agent, add-on is the 0.5-0.8% of dry powder weight.Above slip mixes the back mist projection granulating and obtains particulate material, on press, the particle powder is pressed into embryo spare;
6), sintering: the embryo spare of step 6) is placed the sintering oven sintering, and insulation is 4 hours under 1250 ℃ temperature, obtains the finished product magnetic core.
The invention has the advantages that: magnesium copper Zn soft magnetic ferrite material of the present invention, its technical feature and nickel-zinc ferrite technical feature are equal to.This kind material does not still have report so far through retrieval.
The magnesium copper Zn soft magnetic ferrite material that the present invention mentions goes for all Application Areass of nickel-zinc-ferrite material, can reach complete alternate purpose.
This ferrite has good high frequency characteristics, high DC stacked characteristic and good mechanical strength, the magnesium copper zinc ferrite material of complete alternative nickel-zinc ferrite.The excellent type that adopts present technique to produce, worker's type and ring type magnetic core have very big cost advantage.
Embodiment
Embodiment 1
By red stone: zinc oxide: Natural manganese dioxide: cupric oxide=51.2:10:34.8:4 mol% joins major ingredient, and additive is pressed massfraction and added lime carbonate 0.4, powder blue 0.35 bismuth oxide 0.06.The material vibromill for preparing was mixed 1 hour, and 1050 ℃ of pre-burnings are incubated 3 hours, secondary vibration ball milling 1 hour again after the cooling.Sand mill adds water, pulp density 65%, and sand milling 2 hours adds PVA solution, skimmer, dispersion agent, mist projection granulating obtains particulate material.Compacting T18*10*5,1250 ℃ of sintering are incubated 4 hours.Obtain the finished product magnetic core.Φ 0.31 enameled wire 20 circle, test Q value compares with the nickel-zinc ferrite of same magnetic conductance, can see that two kinds of materials have similar frequency response characteristic below 50MHz.
A is that magnesium zinc material B is a kind of nickel zinc material commonly used, and the magnetic permeability of two kinds of materials is 40.
Common Mg-Zn material obviously increases in the above loss of 20MHz meeting, and the decay of Q value is serious.And the A material is because lime carbonate, the doping effect of powder blue and bismuth oxide, high frequency characteristics be improved significantly.Make it all have the Q value similar with the nickel Zinc material at 1-50MHz, fully can the replacement nickel Zinc material.
Embodiment 2
By red stone: zinc oxide: Natural manganese dioxide: cupric oxide=48.5:21.6:25.9:4 mol% joins major ingredient, and additive is pressed massfraction and added Vanadium Pentoxide in FLAKES 0.2, powder blue 0.35, bismuth oxide 0.12.The ME of particulate material is with example 1.With gained particulate material presser type magnetic core 6*8,1250 ℃ of sintering are incubated 4 hours.Obtain the finished product magnetic core.Φ 0.12 enameled wire, 238.5 circles, 10K, 0.3V surveys inductance value.Do comparison with the nickel Zinc material as same core.Can see the dc superposition characteristic of magnesium zinc material magnetic core and nickel zinc, physical strength is all very similar.
A is that magnesium zinc material B is a kind of nickel zinc material commonly used, and the magnetic permeability of two kinds of materials is 350
High DC stacked characteristic Δ B (Bs-Br) value is very crucial.Above-mentioned Mg-Zn material is because at red stone, zinc oxide has added cupric oxide and constituted new spinel structure outside the Natural manganese dioxide; Not only reduced the sintering temperature of material, also improved density of material, corresponding Bs improves; Δ B (Bs-Br) is worth increase, and dc superposition characteristic improves.Can see that by last table the dc superposition characteristic of the inductance that inductance made from above-mentioned Mg-Zn material and nickel Zinc material are made is equally matched, can replace the nickel Zinc material fully.
Following table is core folding strength trial unit: kg
As previously mentioned, the interpolation of cupric oxide has improved density of material, and the interpolation of bismuth oxide makes the grain refining of Ferrite Material, makes material fine and close, and its physical strength is improved.
Embodiment 3
By red stone: zinc oxide: Natural manganese dioxide: cupric oxide=49.5:22:25:3.5 mol% joins major ingredient, and additive is pressed massfraction and added, Vanadium Pentoxide in FLAKES 0.2, and bismuth oxide 0.15.The ME of particulate material is with example 1.Suppress excellent type magnetic core 4*15 with the gained particulate material, 1250 ℃ of sintering are incubated 4 hours.Obtain the finished product magnetic core.Φ 0.8 enameled wire, 13.5 circles, 1K, 1V surveys inductance value.Do comparison with the nickel Zinc material as same core.Can see the dc superposition characteristic of magnesium zinc material magnetic core and nickel zinc, physical strength is all very similar.
DC stacked test
Following table is core folding strength trial unit: kg
The mechanism of action of this instance is identical with instance 2, repeats no more here.
In a word, magnesium copper zinc ferrite material of the present invention, the replacement nickel Zinc material can reduce the production cost of enterprise greatly fully, reduces the wasting of resources.
Claims (2)
1. magnesium copper Zn soft magnetic ferrite material is characterized in that: the principal constituent prescription calculates with oxide compound: red stone: 48-53mol%, zinc oxide 14-25 mol%, Natural manganese dioxide 20-30 mol%, cupric oxide 1-4 mol% by a mole per-cent;
Doping agent first side ingredient: the mixing of a kind of or any kind in lime carbonate or powder blue or the silicon-dioxide, addition are 200-1000ppm;
Second side ingredient: the mixing of a kind of or any two kinds and three kinds in Vanadium Pentoxide in FLAKES or bismuth oxide or the Quilonum Retard, addition by weight, calculate with oxide compound, add 0.1-1wt%.
2. the preparation method of a magnesium copper Zn soft magnetic ferrite material is characterized in that:
1), press red stone: 48-53mol%, zinc oxide 14-25 mol%, Natural manganese dioxide 20-30 mol%, cupric oxide 1-4mol% joins major ingredient, additive is pressed any portion that massfraction adds doping agent first side ingredient or second side ingredient;
2), ball milling: the material that will prepare mixed 1 hour with vibromill, and the material powder is mixed;
3), pre-burning: with the step 2) material of gained constant temperature pre-burning in 3 hours under 1050 ℃ temperature;
4), secondary ball milling: ball milling for the first time: after the cooling, use the vibromill secondary vibration, 1 hour time; The material of pre-burning is tentatively pulverized, and particle diameter reaches 1-10 μ m; Ball milling for the second time: sand mill adds water, and pulp density in the step 3) is controlled at 65%, and sand milling 2 hours obtains the slip of granularity at 1.0-1.5 μ m;
5), moulding: the PVA solution that in the material of step 4), adds concentration 10 wt%; Add-on is 15% of a dry powder weight, adds the n-Octanol skimmer, and add-on is the 0.2-0.3% of dry powder weight; Add and gather the propionic acid dispersion agent, add-on is the 0.5-0.8% of dry powder weight; Above slip mixes the back mist projection granulating and obtains particulate material, on press, the particle powder is pressed into embryo spare;
6), sintering: the embryo spare of step 6) is placed the sintering oven sintering, and insulation is 4 hours under 1250 ℃ temperature, obtains the finished product magnetic core.
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Cited By (5)
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| CN104157413A (en) * | 2014-07-24 | 2014-11-19 | 湖州南浔双林明宇电子元件厂 | Environment-friendly H-shaped filter inductance magnetic core particles and preparation method thereof |
| CN104291804A (en) * | 2014-09-30 | 2015-01-21 | 南京深宁磁电有限公司 | Method for preparing wide-temperature magnesium-copper-zinc soft magnetic ferrite core |
| CN106900107A (en) * | 2017-02-28 | 2017-06-27 | 吴富明 | A kind of Intelligent lightening device and its control method based on wireless network |
| CN107068332A (en) * | 2017-02-28 | 2017-08-18 | 庆邦电子元器件(泗洪)有限公司 | A kind of inductance element for electronic equipment |
| CN114195497A (en) * | 2021-10-18 | 2022-03-18 | 江西瑞吉磁电子科技有限公司 | High-frequency and high-Curie-temperature magnetic core material and preparation method thereof |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104157413A (en) * | 2014-07-24 | 2014-11-19 | 湖州南浔双林明宇电子元件厂 | Environment-friendly H-shaped filter inductance magnetic core particles and preparation method thereof |
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| CN104291804A (en) * | 2014-09-30 | 2015-01-21 | 南京深宁磁电有限公司 | Method for preparing wide-temperature magnesium-copper-zinc soft magnetic ferrite core |
| CN104291804B (en) * | 2014-09-30 | 2016-03-30 | 南京深宁磁电有限公司 | The preparation method of wide temperature magnesium copper Zn soft magnetic ferrite magnetic core |
| CN106900107A (en) * | 2017-02-28 | 2017-06-27 | 吴富明 | A kind of Intelligent lightening device and its control method based on wireless network |
| CN107068332A (en) * | 2017-02-28 | 2017-08-18 | 庆邦电子元器件(泗洪)有限公司 | A kind of inductance element for electronic equipment |
| CN107068332B (en) * | 2017-02-28 | 2018-07-06 | 庆邦电子元器件(泗洪)有限公司 | A kind of inductance element for electronic equipment |
| CN106900107B (en) * | 2017-02-28 | 2019-03-15 | 吴富明 | A kind of Intelligent lightening device and its control method based on wireless network |
| CN114195497A (en) * | 2021-10-18 | 2022-03-18 | 江西瑞吉磁电子科技有限公司 | High-frequency and high-Curie-temperature magnetic core material and preparation method thereof |
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Application publication date: 20120704 |