CN103337326B - A kind of wideband high-conductivity material and preparation technology thereof - Google Patents
A kind of wideband high-conductivity material and preparation technology thereof Download PDFInfo
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- CN103337326B CN103337326B CN201310281181.5A CN201310281181A CN103337326B CN 103337326 B CN103337326 B CN 103337326B CN 201310281181 A CN201310281181 A CN 201310281181A CN 103337326 B CN103337326 B CN 103337326B
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Abstract
The invention discloses a kind of wideband high-conductivity material, be made up of host component and additive, wherein, consisting of of described host component: Fe
2o
351.8 ~ 53.2mol%, MnO 24 ~ 27mol%, all the other are <b>ZnO</bGreatT. GreaT.GT<b>; Additive described in </b> comprises the first addO-on therapy, the second addO-on therapy and the 3rd addO-on therapy, and described first addO-on therapy is CaCO
30.025 ~ 0.050wt%, TiO
20.015 ~ 0.050wt%, GeO one or both combination in 0.015 ~ 0.025wt%; Described second addO-on therapy is SiO
20.008 ~ 0.012wt%, Nb
2o
50.005 ~ 0.025wt% or NiO one or both combination in 0.010 ~ 0.025wt%; Described 3rd addO-on therapy is Bi
2o
3 0.020 ~ 0.060wt%, MoO
3one of in 0.010 ~ 0.040wt% or the combination of two kinds of components.The present invention is by the control of formula, additive, sintering process, the permeability obtaining material at higher frequencies falls the 10K high permeability materials being less than 20%, each electronic applications can being applied to, for absorbing electromagnetic interference signal, there is good anti-emi properties.
Description
Technical field
The present invention relates to a kind of MnZn ferrite magnetic material.
Background technology
Along with the continuous progress of electronic technology, Switching Power Supply is to high frequency, the fast development of high efficiency direction, and EMI suppresses the important indicator having become Switching Power Supply design.EMI signal not only has very wide frequency range, also has certain amplitude, can pollute electromagnetic environment, cause interference to communication equipment and electronic product through conduction and radiation.So, how to reduce the even EMI problem eliminated in Switching Power Supply and become the problem that Switching Power Supply designers pay special attention to.High magnetic conductivity soft-magnetic ferrite material can absorb electromagnetic interference signal effectively, and high-permeability material becomes many emerging indispensable parts of IT technology, and market is just increasing to the demand of high-permeability material.
Summary of the invention
The technical problem to be solved in the present invention overcomes existing defect, provides a kind of electromagnetic interference signal good absorbing, has the wideband high-conductivity material of good anti-emi properties;
Another object of the present invention is to provide the preparation technology of above-mentioned material.
Object of the present invention carrys out specific implementation by the following technical programs:
A kind of wideband high-conductivity material, is made up of host component and additive, wherein,
Consisting of of described host component: Fe
2o
351.8 ~ 53.2mol%, MnO24 ~ 27mol%, all the other are ZnO;
Described additive comprises the first addO-on therapy, the second addO-on therapy and the 3rd addO-on therapy, and the percentage composition accounting for host component gross mass is:
Described first addO-on therapy is CaCO
30.025 ~ 0.050wt%, TiO
2one or both combination in 0.015 ~ 0.050wt%, GeO0.015 ~ 0.025wt%;
Described second addO-on therapy is SiO
20.008 ~ 0.012wt%, Nb
2o
5one or both combination in 0.005 ~ 0.025wt% or NiO0.010 ~ 0.025wt%;
Described 3rd addO-on therapy is Bi
2o
30.020 ~ 0.060wt%, MoO
3one of in 0.010 ~ 0.040wt% or the combination of two kinds of components.
Described host component consist of Fe
2o
352.2 ~ 52.8mol%, MnO24.2 ~ 25.0mol%, all the other are
best during ZnO.
By the percentage composition accounting for host component gross mass, each component of described additive is CaCO
30.030 ~ 0.040wt%, GeO0.015 ~ 0.020wt%, SiO
20.010 ~ 0.012wt%, Bi
2o
30.030 ~ 0.050wt%, MoO
30.020 ~ 0.030wt%.Now best results.
The preparation technology of above-mentioned wideband high-conductivity material, comprises the steps,
1) preparation of Preburning material
Fe is taken by formula
20
3, MnO, ZnO and the 3rd addO-on therapy, adopt dry method mixed once, need after mixing first to carry out pre-shock mill mixing 30 minutes, refinement feed particles, to make between each component mixing evenly combine tightr, the pre-burning 1 ~ 2 hour at the temperature of 700-900 DEG C of the powder after premixed, obtains Preburning material;
2) preparation of particulate material
Preburning material is added in sand mill, add the first addO-on therapy of formula ratio and the second addO-on therapy and account for the deionized water of host component gross mass 50wt%, sand milling 1 ~ 1.5 hour, be evacuated to mixer after sand milling, and to add concentration be 8 ~ 9%PVA solution, stir 2 hours, carry out secondary mist projection granulating, obtain particulate material, wherein, the 10wt% of described PVA solution addition host component gross mass;
3) preparation of broad-band high-conductive magnetic core
With press, particulate material is suppressed the green compact of external diameter, internal diameter, thickness certain size.Under annular green compact being placed in the temperature of 1380 ~ 1420 DEG C, under the partial pressure of oxygen of 10 ~ 15%, heat preservation sintering 5 ~ 6 hours, obtains required magnetic core.
Preferably, in described step 1), pre-burning 1 ~ 1.5 hour at 850 DEG C; In described step 3), at the temperature of 1390 DEG C, heat preservation sintering 5 ~ 6 hours under the partial pressure of oxygen of 15%.
Beneficial effect of the present invention:
The characteristic of high magnetic permeability magnetic core impedance Z its anti-EMI filter higher is at each frequency better, by impedance operator theoretical formula we know that the impedance operator of magnetic core under certain frequency is relevant with the permeability of magnetic core under this frequency, permeability more high impedance is higher, and anti-EMI filter effect is better; Conventional 10K material even just starts sharply to decline at 200K after 100KHz, and 10K material of the present invention also can keep higher permeability under the frequency of 300KHz.The μ value adopting the present invention can obtain 10KHz reaches 10000(and sees Fig. 1), and: μ 200KHz/ μ 10KHz >=95%(200KHzHz, 25 DEG C)
μ300KHz/μ10KHz≥80%（300KHzHz，25℃）
The present invention is by the control of formula, additive, sintering process, the permeability obtaining material at higher frequencies falls the 10K high permeability materials being less than 20%, each electronic applications can being applied to, for absorbing electromagnetic interference signal, there is good anti-emi properties.
Accompanying drawing explanation
Accompanying drawing is used to provide a further understanding of the present invention, and forms a part for specification, together with embodiments of the present invention for explaining the present invention, is not construed as limiting the invention.In the accompanying drawings:
Fig. 1 is 10K material of the present invention and conventional material frequency-permeability curve comparison diagram.
Embodiment
Below in conjunction with accompanying drawing, the preferred embodiments of the present invention are described, should be appreciated that preferred embodiment described herein is only for instruction and explanation of the present invention, is not intended to limit the present invention.
embodiment 1:
A kind of wideband high-conductivity material, the amount of its host component and additive presses table 1 indication, and its preparation technology is:
1) preparation of Preburning material
Fe is taken by formula
20
3, MnO, ZnO and the 3rd addO-on therapy, adopt dry method mixed once, need after mixing first to carry out pre-shock mill mixing 30 minutes, refinement feed particles, to make between each component mixing evenly combine tightr, the pre-burning 1.5 hours at the temperature of 850 DEG C of the powder after premixed, obtains Preburning material;
2) preparation of particulate material
Preburning material is added in sand mill, add the first addO-on therapy of formula ratio and the second addO-on therapy and account for the deionized water of host component gross mass 50wt%, sand milling 1 ~ 1.5 hour, be evacuated to mixer after sand milling, and to add concentration be 8 ~ 9%PVA solution, stir 2 hours, carry out secondary mist projection granulating, obtain particulate material, wherein, the 10wt% of described PVA solution addition host component gross mass;
3) preparation of broad-band high-conductive magnetic core
With press, particulate material is suppressed the green compact of external diameter, internal diameter, thickness certain size.Under annular green compact being placed in the temperature of 1390 DEG C, under the partial pressure of oxygen of 15%, heat preservation sintering 5 ~ 6 hours, obtains required magnetic core.
embodiment 2:
A kind of wideband high-conductivity material, the amount of its host component and additive presses table 1 indication, and its preparation technology is:
1) preparation of Preburning material
Fe is taken by formula
20
3, MnO, ZnO and the 3rd addO-on therapy, adopt dry method mixed once, need after mixing first to carry out pre-shock mill mixing 30 minutes, refinement feed particles, to make between each component mixing evenly combine tightr, the pre-burning 2 hours at the temperature of 700 DEG C of the powder after premixed, obtains Preburning material;
2) preparation of particulate material
Preburning material is added in sand mill, add the first addO-on therapy of formula ratio and the second addO-on therapy and account for the deionized water of host component gross mass 50wt%, sand milling 1 ~ 1.5 hour, be evacuated to mixer after sand milling, and to add concentration be 8 ~ 9%PVA solution, stir 2 hours, carry out secondary mist projection granulating, obtain particulate material, wherein, the 10wt% of described PVA solution addition host component gross mass;
3) preparation of broad-band high-conductive magnetic core
With press, particulate material is suppressed the green compact of external diameter, internal diameter, thickness certain size.Under annular green compact being placed in the temperature of 1380 DEG C, under the partial pressure of oxygen of 10%, heat preservation sintering 5 ~ 6 hours, obtains required magnetic core.
embodiment 3:
A kind of wideband high-conductivity material, the amount of its host component and additive presses table 1 indication, and its preparation technology is:
1) preparation of Preburning material
Fe is taken by formula
20
3, MnO, ZnO and the 3rd addO-on therapy, adopt dry method mixed once, need after mixing first to carry out pre-shock mill mixing 30 minutes, refinement feed particles, to make between each component mixing evenly combine tightr, the pre-burning 2 hours at the temperature of 900 DEG C of the powder after premixed, obtains Preburning material;
2) preparation of particulate material
Preburning material is added in sand mill, add the first addO-on therapy of formula ratio and the second addO-on therapy and account for the deionized water of host component gross mass 50wt%, sand milling 1 ~ 1.5 hour, be evacuated to mixer after sand milling, and to add concentration be 8 ~ 9%PVA solution, stir 2 hours, carry out secondary mist projection granulating, obtain particulate material, wherein, the 10wt% of described PVA solution addition host component gross mass;
3) preparation of broad-band high-conductive magnetic core
With press, particulate material is suppressed the green compact of external diameter, internal diameter, thickness certain size.Under annular green compact being placed in the temperature of 1420 DEG C, under the partial pressure of oxygen of 12%, heat preservation sintering 5 ~ 6 hours, obtains required magnetic core.
。
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, although with reference to previous embodiment to invention has been detailed description, for a person skilled in the art, it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein portion of techniques feature.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (4)
1. a wideband high-conductivity material, is characterized in that: be made up of host component and additive, wherein,
Consisting of of described host component: described host component consist of Fe
2o
352.2 ~ 52.8mol%, MnO24.2 ~ 25.0mol%, all the other are ZnO;
The each component of described additive is CaCO
30.030 ~ 0.040wt%, GeO0.015 ~ 0.020wt%, SiO
20.010 ~ 0.012wt%, Bi
2o
30.030 ~ 0.050wt%, MoO
30.020 ~ 0.030wt%.
2. the preparation technology of wideband high-conductivity material according to claim 1, is characterized in that: comprise the steps,
1) preparation of Preburning material
Fe is taken by formula
20
3, MnO, ZnO and Bi2O
3, MoO
3, adopt dry method mixed once, need first to carry out pre-shock mill mixing 30 minutes, refinement feed particles after mixing, make mixing between each component evenly combine tightr, the pre-burning 1 ~ 2 hour at the temperature of 700-900 DEG C of the powder after premixed, obtains Preburning material;
2) preparation of particulate material
Preburning material is added in sand mill, add the CaCO of formula ratio
3, GeO and SiO
2and accounting for the deionized water of host component gross mass 50wt%, sand milling 1 ~ 1.5 hour, is evacuated to mixer after sand milling, and to add concentration be 8 ~ 9%PVA solution, stir 2 hours, carry out secondary mist projection granulating, obtain particulate material, wherein, described PVA solution addition is the 10wt% of host component gross mass;
3) preparation of broad-band high-conductive magnetic core
With press, particulate material is suppressed the green compact of external diameter, internal diameter, thickness certain size, under annular green compact being placed in the temperature of 1380 ~ 1420 DEG C, under the partial pressure of oxygen of 10 ~ 15%, heat preservation sintering 5 ~ 6 hours, obtains required magnetic core.
3. the preparation technology of wideband high-conductivity material according to claim 2, is characterized in that: in described step 1), pre-burning 1 ~ 1.5 hour at 850 DEG C.
4. the preparation technology of wideband high-conductivity material according to claim 2, is characterized in that: in described step 3), at the temperature of 1390 DEG C, and heat preservation sintering 5 ~ 6 hours under the partial pressure of oxygen of 15%.
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| CN104051109B (en) * | 2014-06-24 | 2016-07-06 | 铜陵三佳变压器有限责任公司 | A kind of molybdenio ferrite core material for transformator |
| CN104098326A (en) * | 2014-07-07 | 2014-10-15 | 电子科技大学 | Manganese zinc ferrite material with low temperature coefficient, high impedance and high magnetic conductivity and preparation method thereof |
| CN104867641B (en) * | 2015-06-09 | 2017-01-18 | 苏州天铭磁业有限公司 | High-inductance and high-permeability ferrite core for high-frequency transformer |
| CN105978197B (en) * | 2016-06-27 | 2018-06-26 | 双龙集团上海防爆电机盐城股份有限公司 | Permanent-magnetic synchronous motor rotor |
| CN106542817A (en) * | 2016-10-26 | 2017-03-29 | 无锡斯贝尔磁性材料有限公司 | A kind of high frequency high permeability wide-temperature and low-consumption material and preparation method thereof |
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| CN102360917A (en) * | 2011-08-12 | 2012-02-22 | 临沂春光磁业有限公司 | Method for manufacturing broadband high-conductivity manganese-zinc ferrite magnetic core |
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