CN102942886B - Magneto-conductivity gluewater and application thereof - Google Patents
Magneto-conductivity gluewater and application thereof Download PDFInfo
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- CN102942886B CN102942886B CN201210464407.0A CN201210464407A CN102942886B CN 102942886 B CN102942886 B CN 102942886B CN 201210464407 A CN201210464407 A CN 201210464407A CN 102942886 B CN102942886 B CN 102942886B
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Abstract
The invention relates to magneto-conductivity gluewater and application thereof. The magneto-conductivity gluewater comprises chemical curing gluewater, magnetic particles and any nano dispersion additive, wherein the filling quantity of the magnetic particles is more than or equal to 50 percent of the total weight of the magneto-conductivity gluewater. The magneto-conductivity gluewater with high filling quantity has good magneto-conductive effect, so that when the magneto-conductivity gluewater is used for bonding magnetic core gaps, an effect for increasing the magnetic flux can be realized.
Description
Technical field
The present invention relates to a kind of glue and the application thereof with magnetic diffusivity, relate to particularly and a kind ofly can use in the bonding of magnetic core gap and the glue of better permeability characteristics and reliable cohesive strength can be obtained, and the application of this glue in the bonding of magnetic core gap.
Background of invention
Along with the development of high-speed communication and electronic technology, the demand for refining power supply has become the key of supporting more speed unicircuit and has been the key supporting more powerful chip.Secondary power supply can meet the requirement of refining power supply, and it has little size, can supply different voltage, provides the electricity of the stable DC with good power regulation.Therefore it is widely used in signal equipment.Secondary power supply module is formed with the magnetic core of coiling and pcb board by having.The magnetic core used in power module is usually by Ferrite Material Fe
2o
3-Mn-Zn is formed.
In the forming process of power module, usually need to adopt glue or tackiness agent to be combined by two such magnetic cores, and usually adopt epoxy glue to bond magnetic core.Such as, but the product obtained that bonds has problems usually, usually causes the flux loss of flux circuit larger.Reason is to there is magnetic core gap between two FERRITE CORE.Such gap produces huge magnetic resistance by power module, because air or polymkeric substance have large magnetic resistance (μ
0close to 0).Magneticstrength produces obvious magneticstrength and reduces when striding across the air gap between these two magnetic cores.And magnetic resistance will reduce Lm value (induction coefficient of circuit).Lm value reduces, and Im value (current value) will be caused to increase.Along with Im value increases, the loss of coil will increase.This will affect the efficiency of secondary power supply module, and the poor efficiency of secondary power supply will affect the normal work of unicircuit.Like this, the energy of power supply can not meet the requirement affecting unicircuit, and causes meeting system requirements.
Therefore, need to develop the filling that a kind of glue with more high-ferromagnetic matter carries out gap, greatly to reduce the magnetic resistance between two core segments, reduce flux loss, thus the efficiency of secondary power supply can be improved, or reduce (or cancellation) technique for grinding and improve magnetic core magnetic flux, thus promote the efficiency of conversion etc. of transformer.
Summary of the invention
In order to solve the problem of above-mentioned prior art, after present inventor has performed deep research, obtaining a kind of Magneto-conductivitygluewater gluewater that can solve at least part of above-mentioned technical problem, thus completing invention.For this reason, the invention provides following several aspects:
One aspect of the present invention is to provide a kind of Magneto-conductivitygluewater gluewater, it comprises chemosetting glue, magnetic-particle, wherein relative to the gross weight of described Magneto-conductivitygluewater gluewater, the loading level (weight percent content) of magnetic-particle is not less than the gross weight of 50%.This glue has good magnetic conduction effect, thus for bond magnetic core gap time, the effect increasing magnetic flux effect can be had.
In a preferred embodiment of the invention, described Magneto-conductivitygluewater gluewater also comprises nano-dispersed additive, and wherein relative to the gross weight of described Magneto-conductivitygluewater gluewater, the add-on of described nano-dispersed additive is 0.01% to not higher than 1%.The present invention, by adding nano-dispersed additive in glue, significantly improves the dispersion effect of magnetic-particle in glue.
Another aspect of the present invention is to provide a kind of method preparing above-mentioned Magneto-conductivitygluewater gluewater, comprises and magnetic-particle and optional nano-dispersed additive to be added in chemosetting glue and mix.
Another aspect of the invention is to provide the application of a kind of above-mentioned Magneto-conductivitygluewater gluewater in the bonding of magnetic core gap.
Magneto-conductivitygluewater gluewater of the present invention can keep good cohesive strength in the bonding of magnetic core gap, and magnetic property can greatly be increased relative to the glue of prior art, and such as inductance parameters can promote 20%.
Accompanying drawing is sketched
Fig. 1 is the SEM photo of commercial products DMR40 and DMR95 of the magnetic-particle that can use in the present invention.
Fig. 2 is the microstructure schematic diagram of the SMN that can use in the present invention.
Fig. 3 is three kinds of solid-state gram of former bases of sample that can cut that glue of the present invention obtains in magnetism testing and analysis.
Fig. 4 is that glue of the present invention tests sample in the once shaped of magnetism testing and use in analyzing.
Fig. 5 is that glue of the present invention builds schematic diagram at the test macro of magnetism testing and use in analyzing.
Fig. 6 is the magnetic permeability test result showing glue of the present invention, which show 50%, 70% and 80%, the permeability curcve of the particle-filled density samples of 85%.
Fig. 7 is the sample for inductance measurement, and wherein coiling is 20 circles.
Fig. 8 is display nano modification silica dioxide granule Silica SMN to the figure of dispersion effect improving high density granular.
Fig. 9 is display nano modification silica dioxide granule Silica SMN to the schematic diagram of dispersion effect improving high density granular.
Embodiment
One aspect of the present invention is to provide a kind of Magneto-conductivitygluewater gluewater, and it comprises chemosetting glue and magnetic-particle, and wherein relative to the gross weight of Magneto-conductivitygluewater gluewater, the loading level of magnetic-particle is not less than the gross weight of 50%.In the present invention, the loading level of magnetic-particle refers to the gross weight relative to Magneto-conductivitygluewater gluewater (comprising chemosetting glue, magnetic-particle and other optional components), the weight percent of magnetic-particle.The loading level of magnetic-particle of the present invention is preferably not less than 70%, is more preferably not less than 80%.Consider bonding strength and the stability of Magneto-conductivitygluewater gluewater, the loading level of magnetic-particle is preferably less than 95%, and more preferably less than 90%.
In the present invention, described chemosetting glue can be applied to two kinds by between adhesives under typically referring to liquid state or viscous pasty state, subsequently chemical transformation occurs, and changes into solid-state from liquid or flow state, produces the glue of bonding strength.
The example of the chemosetting glue that can use in the present invention comprises the structure glue that can produce certain bonding strength after hardening, such structure glue includes but not limited to acrylate type structure glue, epoxide resin type structure glue, polyurethane type structure glue etc., preferred acrylate type structure glue and epoxide resin type structure glue, the bi-component acrylic ester type structure glue of especially preferred excellence in storge quality with rapidly-curable when using and bi-component epoxide-resin type structure glue.As a preferred embodiment of such bicomponent structure glue, bi-component acrylic ester type structure glue DP810, D818 that 3M company produces can be enumerated, and bi-component epoxide-resin type structure glue DP420, DP460 etc.
In the present invention, term " vinylformic acid colloid " and " acrylate type structure glue " can be used alternatingly.
In the present invention, magnetic-particle typically refers to the magnetic particle of tool or magnetic, and therefore, hereinafter, magnetic-particle is also referred to as magnetic sometimes.The magnetic-particle that can use in the present invention preferably has high magnetic permeability value, such as, under 10KHz, has the high magnetic permeability value of more than 1500.In addition, contriver finds, can be evenly dispersed in chemosetting glue to make magnetic-particle to obtain high loading level, magnetic-particle needs to have certain size and shape, wherein spheroidal particle is most preferred, and preferably D50 (median) is in 2 ~ 50 micrometer ranges, and maximum particle diameter is no more than 80 microns.Consider from the angle meeting above-mentioned requirements, Mn-Zn ferrite magnetic particle, Ni-Zn ferrite particle, iron sial powder and FeCuNbSiB powder etc. are preferred, and the example of its representational commercial products can be DMR40 and DMR95 of horizontal shopkeeper's magnetic group company.These two kinds of magnetic-particles may be used singly or in combin.
Although high filler loading capacity can be had by suitably selecting chemosetting glue of the present invention and magnetic-particle to obtain; thus there is the Magneto-conductivitygluewater gluewater of high magnetic conduction effect; but; there is very high loading level; such as 70% even more than 80% time, conventional polymkeric substance packing technique (polymerpack technology) usually can run into the problem that can not realize good magnetic distributed effect.Therefore, contriver for how improving the dispersion effect of magnetic-particle in glue conducts in-depth research, and finds to improve the dispersion effect of magnetic-particle in glue by adding nano-dispersed additive in glue.
Therefore, another aspect of the present invention additionally provides the Magneto-conductivitygluewater gluewater that a kind of performance is further improved, this glue comprises chemosetting glue, magnetic-particle and nano-dispersed additive, wherein relative to the gross weight of described Magneto-conductivitygluewater gluewater, the add-on of described nano-dispersed additive is 0.01% to not higher than 1%, preferably 0.1 ~ 0.8%, more preferably 0.4 ~ 0.6%.
Although be reluctant to arrest in any theory, it is believed that described nano-dispersed additive of the present invention is attached on the surface of magnetic-particle, thus change the condition of surface of magnetic-particle, magnetic-particle is more easily dispersed in chemosetting glue.
The present inventor finds, in order to realize better dispersion effect, especially when high viscosity compound, needs the size control of nano-dispersed additive in be enhanced particle size 1/5000.In the present invention, the D50 of magnetic-particle is preferably 2 ~ 50 microns, and therefore, the size of nano-dispersed additive can be 0.4 ~ 10nm, and consider actual available nano-dispersed additive, preferably its mean sizes is 1 ~ 10nm.
In nano-dispersed additive of the present invention, preferred nano grade silica particles.But the nano silicon that ordinary method manufactures, granularity is many more than tens nanometers, and dispersion effect is not good, and the improvement DeGrain to full-bodied compound.To this, contriver finds after deliberation, and the surface of nano-silica powder is after silane coupling agent process, low surface energy characteristic can be presented, for ball-type, and its size by within the scope of control 2 ~ 10nm, thus can meet the condition in be enhanced particle size 1/5000.
An example of the nano-dispersed additive that can use in Magneto-conductivitygluewater gluewater of the present invention is the Silica SMN of 3M company.This is a kind of surface modification of silica particle.This surface modification of silica particle have employed the coated process of silane coupling agent, particle after process presents low surface energy characteristic, approximate ball-type, median size in 2 nanometers in 10 nanometer range, optimum size is at about 5nm, the particle of one of them 75 nanometer is equivalent to the volume of the particle of 3500 5 nanometers, and the particle of 15 microns is equivalent to 10
9the volume of individual 5 nano particles; its play each other on macrobead top layer lubrication lower rubbing effect, treated particle can be with electrically of the same race usually, between there is mutual repulsion; it can reduce particle and intergranular frictional coefficient, plays and improves mobility effect.Fig. 9 show schematically show Silica SMN to the dispersion effect improving high density granular.
In the preparation process of Magneto-conductivitygluewater gluewater of the present invention, the order of addition of each component has no particular limits.Usually at ambient temperature, the nano-dispersed additive of the magnetic-particle of requirement and optional requirement is added in chemosetting glue, then mixes, Magneto-conductivitygluewater gluewater of the present invention can be obtained.
It is pointed out that when chemosetting glue is two-component-type structure glue, can in advance magnetic-particle (and optional nano-dispersed additive) be added in two kinds of components of component type structure glue respectively.
Magneto-conductivitygluewater gluewater of the present invention can be applied to and variously need in the application of magnetic diffusivity, is suitable for application in the bonding of magnetic core gap especially.
Magnetic core in the bonding of magnetic core gap of the present invention can be the magnetic core used in secondary power supply module, and it with coiling, and preferably can be made up of Ferrite Material.
Embodiment
The raw material used as chemosetting glue, magnetic-particle, nano-dispersed additive is in the examples below described below.
1.Mn-Zn ferrite powder DMR40 and DMR95
DMR40 and DMR95 is the Mn-Zn ferrite powder trade mark of horizontal shopkeeper's magnetic group company standard.
Table 1 gives the Exemplary magnetic matter of DMR40 and DMR95
The microstructure of DMR40 and DMR95 as shown in Figure 1.
2. acrylate type structure glue DP810
Acrylate type structure glue DP810 is a kind of esters of acrylic acid glue of two-pack, and commercially available from 3M company.The matrix resin (B component) of DP810 is primarily of material compositions such as acrylate oligomer, acrylonitrile butadiene copolymer, MBSs, the promotor (component A) of DP810 is primarily of material compositions such as alpha, alpha-dimethylbenzyl hydrogen peroxide, hydroxyethyl methylacrylates.Its typical properties is as shown in table 2.
The typical properties of table 2DP810
5. epoxide resin type structure glue DP420
Epoxide resin type structure glue DP420 is a kind of glue of bi-component epoxide-resin type, and commercially available from 3M company.The matrix resin (B component) of DP420 is by epoxy resin and 2, the material compositions such as 3-epoxypropyl propyl trimethoxy silicane, promotor (component A) is by 4,7,10-tri-oxygen-1, the material compositions such as 13-tridecane diamine, bisphenol A diglycidyl ether, 2,4,6-tri-(dimethylamino methyl) phenol.Its typical properties is as shown in table 3
The typical properties of table 3DP 420
Select the benefit of bicomponent structure glue: operation is simple, solidification is rapid, and bonding strength is high.
6. the nano particle (SMN) of surface modification
SMN is the SiO of a kind of surface through silane coupling agent process
2nano particle.The Silica SMN of recommendation 3M company.
The microstructure of SMN is schematically shown in Fig. 2, its characteristic reference following table 4.
The dimensional properties of table 4 surface modified nano silicon
| Granularity | The quantity in reactive surfaces site | The quality of single silicon dioxide granule |
| 75nm | 43,900 | 4.9E-16 gram |
| 50nm | 22,500 | 1.4E-16 gram |
| 20nm | 3,300 | 9.2E-18 gram |
| 5nm | 220 | 1.4E-19 gram |
| 2nm | 32 | 8.9E-21 gram |
Should be appreciated that specific embodiment is below to describe the present invention better, and should not be construed as the restriction for protection scope of the present invention.
embodiment 1
The present embodiment adopts bi-component acrylic structure-type glue DP810 (being manufactured by 3M company limited), and the B component of DP810 and component A adopt the ratio of 1: 1 to be mixed into collagen material.
Then add DMR40 and the DMR95 powder (being manufactured by horizontal shopkeeper's magnetic group company) of different ratios, analysed for powder adds the impact for adhesive property.
Sample preparation is completed by following technique:
1). according to control sample X1 limit B component and the component A that ratio weighs DP810 respectively, as 50g B component: 50g component A;
2). with the B component of the stirring velocity of 2 circle/seconds mixing DP810 and component A, mixing time is 3 minutes, makes " control sample X1 ";
3) prepare associated sample after mixing immediately to test;
4). according to control sample X1 limit B component and the component A that ratio weighs DP810 respectively, as 50g B component: 50g component A;
5). according to experiment purpose different ratios, weigh corresponding DMR95 sample and DMR40 sample.As the scheme of " 25%W DMR95 is filled into ' control sample X1 " in ", be at 75g " in control sample X1 ", fill the DMR95 sample of 25g.Described herein corresponding sample of weighing, is and takes 25g DMR95.
6). by the B component of corresponding powdered sample (the 25g DMR95 as alleged heavy above), DP810 and component A mixing ", with stirring of 2 circle/seconds, mixing time is 5 minutes.
7). prepare associated sample after mixing immediately and test.
The proportioning of the composition of sample and the performance test results display are in table 5.
Table 5 different ratios DMR40 and DMR95 adds in DP810, test bonding strength (dynamic shear strength)
Control sample shows with the test result of filling different ratios DMR40/DMR95 magnetic powder:
1., add DMR40 and the DMR95 of different ratios respectively in control sample after, the magnetic conduction glue of gained still keeps very high bonding strength.
2. acrylic-type bicomponent structure type glue (DP810, X1) is applicable to this kind of magnetic powder infill system, and be make the choice direction with magnetic diffusivity structure-type bonded adhesives, its bonding strength can meet magnetic core bonding strength demand.
embodiment: 2
Acrylate type bicomponent structure glue DP810 ((B component: component A=1: 1)+2%3M SilicaSMN, obtains control sample X2.Bonding time control glue layer thickness is 0.1mm, and control sample X2 is as shown in table 5 with the bonding strength (dynamic shear strength) of the glue adding different ratios magnetic powder.
Sample preparation is completed by following technique:
1). weigh the Silica SMN that DP810 sample (B component and component A) and massfraction are 2% respectively, as 50g B component: 50g component A: 2gSilica SMN according to " control sample X2 " institute restriction ratio;
2). with the stirring velocity of the 2 circle/seconds mixing B component of DP810 and component A and SilicaSMN, mixing time is 3 minutes, makes " control sample X2 ";
3) prepare associated sample after mixing immediately to test.
4). according to experiment purpose different ratios, weigh corresponding DMR95 sample and DMR40 sample.As the scheme of " 25%W DMR95 is filled into ' control sample X2 " in ", be at 75g " in control sample X2 ", fill the DMR95 sample of 25g.Described herein corresponding sample of weighing, is and takes 25g DMR95;
5). be filled to by corresponding powdered sample (the 25g DMR95 as alleged heavy above) " in the control sample X2 " of 75g, mix with the stirring velocity of 2 circle/seconds, mixing time is 5 minutes.
6). prepare associated sample after mixing immediately and test.
Table 6 different ratios DMR40 and DMR95 adds in DP810 (B component: component A=1: 1, and add 2%Silica SMN), (bondline thickness controls: 0.1mm) in test bonding strength (dynamic shear strength)
As shown in Table 6, bonding strength still keeps reliable, compared with the acrylate glue (control sample X2) not adding magnetic powder, fill 50% with the sample of 70%DMR powder and 50%DMR40/DMR95 mixed powder (mix at 1: 1), there is not decline sharply in bonding strength.
embodiment 3:
In epoxide resin type bicomponent structure glue 3M DP420 (X3), add DMR40 and DMR95 powder, analyze the impact of powder interpolation for the bonding strength of epoxide resin type bicomponent structure glue of different ratios.Test result is as shown in table 7.
Sample preparation is completed by following technique:
1). weigh B component and the component A of DP420 respectively according to " control sample X3 " institute restriction ratio, as 66.66g B component: 33.33gA component;
2). with the stirring velocity of 2 circle/seconds mixing DP420, B component and component A, mixing time is 3 minutes, makes " control sample X3 ";
3) prepare associated sample after mixing immediately to test.
4). according to experiment purpose different ratios, weigh corresponding DMR95 sample and DMR40 sample; As the scheme of " 50%W DMR95 is filled into ' control sample X3 " in ", be at 50g " in control sample X3 ", fill the DMR95 sample of 50g.Described herein corresponding sample of weighing, is and takes 50g DMR95;
4). be filled to by corresponding powdered sample (the 50g DMR95 as alleged heavy above) " in the control sample X3 " of 50g, mix with the stirring velocity of 2 circle/seconds, mixing time is 3 minutes.
6). prepare associated sample after mixing immediately and test.
Magnetic conduction powder DMR40 and the DMR95 of table 7 different ratios adds epoxide resin type bicomponent structure glue DP420 (B component: component A=2: 1) in glue, test bonding strength (not controlling bondline thickness) to
Contrast acrylate type bicomponent structure glue DP810, table 7 numerical value is relatively low.But after the DMR 95 of interpolation 70%, the bonding strength of magnetic glue does not still obviously reduce.Epoxide resin type bicomponent structure glue DP420 is applicable to the DMR95 adding high-content, has the application potential that magnetic core is bonding.
embodiment 4
Under control bondline thickness is the prerequisite of 0.1mm, at epoxy resin 3M DP420, (B component: component A=1: 1) add DMR40 and DMR95 powder in epoxy glue system (X2) analyzes the impact of powder interpolation for the bonding strength (dynamic shear strength) of epoxide resin type bicomponent structure glue of different ratios.Test result is as shown in table 8.
Sample preparation is completed by following technique:
1). weigh B component and the component A (2: 1) of DP420 sample respectively according to " control sample X4 " institute restriction ratio, as 66.66g B component: 33.33g component A;
2). with the B component of the stirring velocity of 2 circle/seconds mixing DP420 and component A, mixing time is 3 minutes, makes " control sample X4 ";
3) prepare associated sample after mixing immediately to test.
4). according to experiment purpose different ratios, weigh corresponding DMR95 sample and DMR40 sample.As the scheme of " 50%W DMR95 is filled into ' control sample X4 " in ", be at 50g " in control sample X4 ", fill the DMR95 sample of 50g.Described herein corresponding sample of weighing, is and takes 50g DMR95;
4). be filled to by corresponding powdered sample (the 50g DMR95 as alleged heavy above) " in the control sample X4 " of 50g, mix with the stirring velocity of 2 circle/seconds, mixing time is 3 minutes;
6) prepare associated sample after mixing immediately to test.
Table 8 different ratios DMR40 and DMR95 magnetic conduction particle powder add epoxide resin type bicomponent structure glue DP420 (B component: component A=1: 1) in glue, test bonding strength (control bondline thickness is 0.1mm) to
As shown in Table 8: after adding 70%DMR 95 or 50%DMR40, the epoxide resin type bicomponent structure glue of magnetic powder is not added in contrast, and bonding strength does not obviously decline.Epoxide resin type bicomponent structure glue DP420 is applicable to the DMR95 adding high-content, has the application potential that magnetic core is bonding.
Below, performance test and the analysis of magnetic glue of the present invention are described.
1. preparation of samples:
Conveniently test, select another one than the base material system being easier to process to study the impact of different ratios magnetic powder filling on magnetic property.
In selection DP810, filling weight ratio is: 85%, the DMR40 of 70%, 50%.
After solidification, cut into ring-type testing sample, as shown in Figure 3.
The former base once shaped of solid-state gram of sample adopting the compound blunderbuss that an internal diameter is 3mm, external diameter is 7mm can cut above-mentioned three kinds obtains test sample, as shown in Figure 4, the external diameter wherein testing sample is 7mm to described test sample, internal diameter is 3mm and thickness is 0.5mm.
Test macro builds as shown in Figure 5.
Fig. 6 shows the magnetic permeability test result under the frequency of 1 ~ 10MHz.This curve display, magnetic-particle fill lower than 70 % by weight time, magnetic permeability is substantially lower than 2, and the directive significance of this value to practical application is little; But when scope 70 ~ 80% of the tamped density of magnetic-particle, magnetic permeability presents the trend improved rapidly, when tamped density higher than 80% time, magnetic permeability rises to more than 15, and this value is have using value very much in practice.
2. be applied to the inductance measurement at magnetic core gap place:
For the sample reference accompanying drawing 7 of inductance measurement, wherein coiling is 20 circles.
*: the mean value measured for 5 times.
Quality factor: to characterize in an energy storage device (as telefault, electric capacity etc.), tank circuit stored energy with a kind of quality index of the ratio of each cycle loss of energy; The Q value of reactive element equals its reactance and the ratio of its equivalent series resistance; The Q value of element is larger, the circuit formed with this element or the selectivity of network better.
Inductance value gain angle consideration after using as caking agent with the glue not adding any magnetic conduction particle: add the magnetic conduction particle of 25%, inductance gain is not obvious; When ratio reaches 50%, find that inductance has the lifting of 20%, when being increased to 70%, inductance gain reaches 50%.The visible weight packing ratio being not less than 50% is very important to inductance value (magnetic track rate).
3. the dispersion effect to high density granular after employing nano modification particle
Add the admixture after modified silica particles with reference to shown in accompanying drawing 8.Wherein, the DP810 be purchased from 3M company is mixed with the DMR40 powder of 25%, 50% and 75% respectively, and investigate do not add from 3M company buy nanometer 2 ~ 10nm when silane coupler modified nano Si lica SMN surface modified granules and adding proportion are 0.5 % by weight, the dispersion effect of the modified glue obtained.As can be seen from the dispersion effect in Fig. 8, in the magnetic conduction glue that high-density is filled, nano particle serves vital effect for the fluid and whipping characteristic improving high concentration liquid.
Claims (17)
1. a Magneto-conductivitygluewater gluewater, it comprises chemosetting glue, magnetic-particle and nano-dispersed additive, wherein relative to the gross weight of described Magneto-conductivitygluewater gluewater, the weight percentage of described magnetic-particle is not less than 50%, the weight percent of described nano-dispersed additive is 0.01% to not higher than 1%, and
Wherein said magnetic-particle be selected from D50 2 ~ 50 microns, maximum particle diameter is no more than 80 microns, and under 10kHz, has the spherical granules of the high magnetic permeability of more than 1500;
The mean sizes of wherein said nano-dispersed additive is within the scope of 1 ~ 10nm.
2. Magneto-conductivitygluewater gluewater according to claim 1, the weight percentage of wherein said magnetic-particle is not less than 70%.
3. Magneto-conductivitygluewater gluewater according to claim 1, the weight percentage of wherein said magnetic-particle is not less than 80%.
4. Magneto-conductivitygluewater gluewater according to claim 1, wherein said chemosetting glue is selected from acrylate type structure glue, epoxide resin type structure glue and polyurethane type structure glue.
5. Magneto-conductivitygluewater gluewater according to claim 4, wherein said chemosetting glue is bi-component acrylic ester type structure glue or bi-component epoxide-resin type structure glue.
6. Magneto-conductivitygluewater gluewater according to claim 1, wherein said magnetic-particle is selected from Mn-Zn ferrite magnetic particle, Ni-Zn ferrite particle, iron sial powder and FeCuNbSiB powder.
7. Magneto-conductivitygluewater gluewater according to claim 1, wherein said magnetic-particle is at least one Mn-Zn ferrite magnetic particle.
8. Magneto-conductivitygluewater gluewater according to claim 1, the weight percent of wherein said nano-dispersed additive is 0.1 ~ 0.8%.
9. Magneto-conductivitygluewater gluewater according to claim 1, the weight percent of wherein said nano-dispersed additive is 0.4 ~ 0.6%.
10. Magneto-conductivitygluewater gluewater according to claim 1, described nano-dispersed additive is through the nano-silica powder of silane coupling agent process.
11. Magneto-conductivitygluewater gluewater according to claim 10, wherein said nano-silica powder is ball-type, and mean sizes is within the scope of 2 ~ 10nm.
12. 1 kinds of methods preparing the Magneto-conductivitygluewater gluewater according to any one of claim 1 to 11, described method comprises to add to magnetic-particle and nano-dispersed additive in chemosetting glue and mixes, wherein relative to the gross weight of described Magneto-conductivitygluewater gluewater, the weight percentage of magnetic-particle is not less than 50%, and the weight percent of described nano-dispersed additive is 0.01% to not higher than 1%.
13. methods according to claim 12, wherein when chemosetting glue is two-component-type structure glue, add in two kinds of components of component type structure glue respectively by magnetic-particle and nano-dispersed additive.
The application of 14. Magneto-conductivitygluewater gluewater according to any one of claim 1 to 11 in the bonding of magnetic core gap.
15. application according to claim 14, wherein said magnetic core is the magnetic core used in secondary power supply module.
16. application according to claim 15, wherein said magnetic core is with coiling.
17. application according to claim 15, wherein said magnetic core is made up of Ferrite Material.
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