CN104733149A - Bendable magnetic core and manufacturing method thereof - Google Patents
Bendable magnetic core and manufacturing method thereof Download PDFInfo
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- CN104733149A CN104733149A CN201310718582.2A CN201310718582A CN104733149A CN 104733149 A CN104733149 A CN 104733149A CN 201310718582 A CN201310718582 A CN 201310718582A CN 104733149 A CN104733149 A CN 104733149A
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Abstract
The invention discloses a bendable magnetic core and a manufacturing method thereof. The magnetic core consists of the following materials in part by mass: 85-95 parts of magnetic powder ingredients and 5-15 parts of plastic ingredients; the plastic ingredients comprise the following materials in part by mass: 75-85 parts of plastics and 15-25 parts of rubber and plastics auxiliaries; and the magnetic powder ingredients are mixture of PVA (polyvinyl acetate) glue, dispersing agents, defoaming agents and ferrite magnetic powder. The plastics are added in the magnetic powder, so that the magnetic core is bendable and is high in falling resistance. The manufacturing method is simple, and characteristics of products can meet using requirements.
Description
Technical field
The present invention relates to technical field of magnetic materials, particularly relate to a kind of magnetic core rolling over bendability and preparation method thereof.
Background technology
Magnetic filter magnetic core can be applicable to the field such as inductance component filter coil, high screen filter and radio circuit, EMI electromagnetic shielding, wireless charging.Existing magnetic core raw material, after high temperature burns till, has certain hardness and shape, easily causes and break, and when causing formed product like this, thickness is difficult to reach actual needs, and production has certain difficulty.
Summary of the invention
In view of this, one aspect of the present invention provides a kind of magnetic core rolling over bendability, and this magnetic core adopts and add plastics in magnetic, and make magnetic core possess flexible, crash resistance is better.
A kind of magnetic core rolling over bendability, be made up of 85 ~ 95 mass parts magnetic components and 5 ~ 15 mass parts plastic fractions, described plastic fraction is made up of 75 ~ 85 mass parts plastics and 15 ~ 25 mass parts rubber and plastics auxiliaries, and described magnetic component is the mixture of PVA glue, dispersant, defoamer and ferromagnetic oxide powder.
Any one ferromagnetic oxide powder well-known to those skilled in the art all can realize technical scheme of the present invention.Ferromagnetic oxide powder can be MnZn magnetic or nickel zinc magnetic.Ferromagnetic oxide powder is that the magnetic component of nickel zinc magnetic is by 4 ~ 23 mass parts PVA glue, 0.5 ~ 1.5 mass parts dispersant, 0.1 ~ 0.3 mass parts defoamer, 45 ~ 65 mass parts iron oxide, 5 ~ 25 mass parts zinc oxide, 2 ~ 20 mass parts cupric oxide, 0 ~ 18 mass parts nickel oxide, 0 ~ 20 mass parts manganese oxide and 0 ~ 10 mass parts magnesium oxide.
Promoter in the present invention is mainly used in the dispersion promoting ferromagnetic oxide powder.In each component raw material of promoter, PVA glue is the aqueous solution of PVA, and PVA Chinese polyvinyl alcohol by name is white plates, cotton-shaped or pulverulent solids.Infusion is also called anti-foaming agent, and steep with pressing down for froth breaking, it can be silicone oil and emulsifying agent.Emulsifying agent is that a class plays the surfactant of stabilization to emulsion.Dispersant is dissolved in the inorganic of liquid for disperseing those to be difficult to, the solid particle of organic pigment, and the sedimentation of solid particle and cohesion also can be prevented to form stable suspension simultaneously.Emulsifying agent can be acrylic acid and propyl carboxylate.
Preferably, described plastics are one in CPE, PE, EPDM and NBR or at least two kinds, more preferably CPE.CPE Chinese haloflex by name, be saturated macromolecular material, outward appearance is white powder, nonpoisonous and tasteless, has excellent weather resisteant, resistance to ozone, chemical-resistant resistance and ageing-resistant performance, has good oil resistance, anti-flammability and tinctorial property.Toughness good (still having pliability at-30 DEG C), have good compatibility with other macromolecular material, decomposition temperature is higher.Described rubber and plastics auxiliaries is plasticizer and/or soybean oil.Plasticizer can be the compound of phthalate.
The present invention provides a kind of preparation method rolling over bendability magnetic core on the other hand, and the method adopts adds plastics in the magnetic of presintering, and make magnetic core possess flexible, crash resistance is better.
Prepare a method for magnetic core as claimed in claim 1, comprise the following steps:
(1) 75 ~ 85 mass parts plastics are fully mixed rear banburying with 15 ~ 25 mass parts rubber and plastics auxiliaries and obtain banburying plastics;
(2) carry out sintering after PVA glue, dispersant, defoamer and ferromagnetic oxide powder fully being mixed to obtain sintering magnetic;
(3) open refining after carrying out vulcanization reaction after 85 ~ 95 mass parts sintering magnetics and 5 ~ 15 mass parts banburying plastics fully being mixed and obtain out refining powder;
(4) refining powder will be opened shaping.
Wherein, the temperature of described banburying is 120 ~ 140 DEG C, and the time of banburying is 10 ~ 15min, is preferably 12min.
Wherein, the temperature of described vulcanization reaction is 120 ~ 140 DEG C.The time that those skilled in the art can know vulcanization reaction is shorter, and its time implements to can be considered without impact on the technical program.The temperature opening refining is 90 ~ 100 DEG C, and the time of opening refining is 10 ~ 30min, is preferably 15min.
Wherein, the temperature of described sintering is 900 ~ 1200 DEG C, is preferably 1100 DEG C.The time of sintering is 1.5 ~ 2.5h, is preferably 2h.
Wherein, after step (2), also comprise before the step (3) and sintering powder carried out ball milling and sieve with 80 ~ 180 order mesh screens; Also comprise after step (4) and move back reaction of Salmon-Saxl and cut shaping after moving back reaction of Salmon-Saxl.Moving back reaction of Salmon-Saxl is removed by the sulphur be mixed in product in vulcanization reaction process, and this process only needs through heating, and the enforcement of its time on the technical program can be considered without impact.
Compared with prior art, the present invention has following beneficial effect: (1) adopts magnetic to be combined with plastic material, makes the anti-ability of beating of magnetic core better, not easily breaks into pieces, longer service life, and can be pressed into specific thickness; (2) preparation method is simple; (3) characteristic can meet instructions for use.
Embodiment
For ease of understanding the present invention, it is as follows that the present invention enumerates embodiment.Those skilled in the art should understand, described embodiment is only help to understand the present invention, should not be considered as concrete restriction of the present invention.
Industrial chemicals involved in following examples, as do not illustrated, all can directly be buied from the market.
Embodiment 1
To insert in banbury banburying 12min at 130 DEG C after 80g CPE and 20g soybean oil fully being mixed and obtain banburying plastics.Insert after 561.32g iron oxide, 84.2g zinc oxide, 33.68g cupric oxide, 93.56g nickel oxide, 46.78g magnesium oxide, 74.84g PVA glue, 4.68g dispersant and 0.94g defoamer are fully mixed in high temperature furnace at 1100 DEG C of sintering 2h, the powder ball milling obtained will be sintered, after sieving with 120 order mesh screens, add after banburying plastics fully mix and carry out vulcanization reaction at 200 DEG C.Then proceeded to by the powder after sulfuration in mill open refining 15min at 95 DEG C after, after carry out moving back reaction of Salmon-Saxl at 105 DEG C, adopt compacting by rolling, the dimensions cutting into 52mm*47mm*0.8mm obtains rolling over bendability magnetic core.
The magnetic core side performance of this example is as following table:
Embodiment 2
To insert in banbury banburying 12min at 130 DEG C after 80g CPE and 20g soybean oil fully being mixed and obtain banburying plastics.Insert after 502.9 iron oxide, 121.07g zinc oxide, 35.76g cupric oxide, 74.5g manganese oxide, 48.43g magnesium oxide, 111.75g PVA glue, 4.66g dispersant and 0.93g defoamer are fully mixed in high temperature furnace at 1100 DEG C of sintering 2h, the powder ball milling obtained will be sintered, after sieving with 120 order mesh screens, add after banburying plastics fully mix and carry out vulcanization reaction at 200 DEG C.Then proceeded to by the powder after sulfuration in mill open refining 15min at 95 DEG C after, after carry out moving back reaction of Salmon-Saxl at 105 DEG C, adopt compacting by rolling, the dimensions cutting into 52mm*47mm*0.8mm obtains rolling over bendability magnetic core.
The magnetic core side performance of this example is as following table:
Embodiment 3
To insert in banbury banburying h at 130 DEG C after 80g CPE and 20g soybean oil fully being mixed and obtain banburying plastics.Insert after 900g MnZn magnetic, 111.75g PVA glue, 4.66g dispersant and 0.93g defoamer are fully mixed in high temperature furnace at 1100 DEG C of sintering 2h, the powder ball milling obtained will be sintered, after sieving with 120 order mesh screens, add after banburying plastics fully mix and carry out vulcanization reaction at 200 DEG C.Then proceeded to by the powder after sulfuration in mill open refining 15min at 95 DEG C after, after carry out moving back reaction of Salmon-Saxl at 105 DEG C, adopt compacting by rolling, the dimensions cutting into 52mm*47mm*0.8mm obtains rolling over bendability magnetic core.
The magnetic core side performance of this example is as following table:
Embodiment 4
To insert in banbury banburying 12min at 130 DEG C after 90.2g CPE and 19.8g soybean oil fully being mixed and obtain banburying plastics.Insert after 456.748g iron oxide, 131.542g zinc oxide, 82.592g cupric oxide, 69.865g magnesium oxide, 138.217g PVA glue, 9.167g dispersant and 1.869g defoamer are fully mixed in high temperature furnace at 1100 DEG C of sintering 2h, the powder ball milling obtained will be sintered, after sieving with 120 order mesh screens, add after banburying plastics fully mix and carry out vulcanization reaction at 200 DEG C.Then proceeded to by the powder after sulfuration in mill open refining 15min at 95 DEG C after, after carry out moving back reaction of Salmon-Saxl at 105 DEG C, adopt compacting by rolling, the dimensions cutting into 52mm*47mm*0.8mm obtains rolling over bendability magnetic core.
The magnetic core side performance of this example is as following table:
Embodiment 5
To insert in banbury banburying 12min at 130 DEG C after 62.4g CPE and 17.6g soybean oil fully being mixed and obtain banburying plastics.Insert after 573.804 iron oxide, 86.112g zinc oxide, 30.176g cupric oxide, 66.792g nickel chloride, 70.38g manganese oxide, 10.58g magnesium oxide, 76.544g PVA glue, 4.692g dispersant and 0.92g defoamer are fully mixed in high temperature furnace at 1100 DEG C of sintering 2h, the powder ball milling obtained will be sintered, after sieving with 120 order mesh screens, add after banburying plastics fully mix and carry out vulcanization reaction at 200 DEG C.Then proceeded to by the powder after sulfuration in mill open refining 15min at 95 DEG C after, after carry out moving back reaction of Salmon-Saxl at 105 DEG C, adopt compacting by rolling, the dimensions cutting into 52mm*47mm*0.8mm obtains rolling over bendability magnetic core.
The magnetic core side performance of this example is as following table:
It should be noted that and understand, when not departing from the spirit and scope of accompanying claim the present invention for required protection, various amendment and improvement can be made to the present invention of foregoing detailed description.Therefore, the scope of claimed technical scheme is not by the restriction of given any specific exemplary teachings.
Applicant states, the present invention illustrates detailed process equipment and process flow process of the present invention by above-described embodiment, but the present invention is not limited to above-mentioned detailed process equipment and process flow process, namely do not mean that the present invention must rely on above-mentioned detailed process equipment and process flow process and could implement.Person of ordinary skill in the field should understand, any improvement in the present invention, to equivalence replacement and the interpolation of auxiliary element, the concrete way choice etc. of each raw material of product of the present invention, all drops within protection scope of the present invention and open scope.
Claims (10)
1. can roll over the magnetic core of bendability for one kind, it is characterized in that, be made up of 85 ~ 95 mass parts magnetic components and 5 ~ 15 mass parts plastic fractions, described plastic fraction is made up of 75 ~ 85 mass parts plastics and 15 ~ 25 mass parts rubber and plastics auxiliaries, and described magnetic component is the mixture of PVA glue, dispersant, defoamer and ferromagnetic oxide powder.
2. magnetic core according to claim 1, is characterized in that, described ferromagnetic oxide powder is nickel zinc magnetic or MnZn magnetic.
3. magnetic core according to claim 2, it is characterized in that, comprise the magnetic component of nickel zinc magnetic by 4 ~ 23 mass parts PVA glue, 0.5 ~ 1.5 mass parts dispersant, 0.1 ~ 0.3 mass parts defoamer, 45 ~ 65 mass parts iron oxide, 5 ~ 25 mass parts zinc oxide, 2 ~ 20 mass parts cupric oxide, 0 ~ 18 mass parts nickel oxide, 0 ~ 20 mass parts manganese oxide and 0 ~ 10 mass parts magnesium oxide.
4. magnetic core according to claim 1, is characterized in that, described defoamer is silicone oil and emulsifying agent, and described dispersant is acrylic acid and propyl carboxylate.
5. magnetic core according to claim 1, is characterized in that, described plastics are one in CPE, PE, EPDM and NBR or at least two kinds, and described rubber and plastics auxiliaries is plasticizer and/or soybean oil.
6. prepare a method for magnetic core as claimed in claim 1, it is characterized in that, comprise the following steps:
(1) 75 ~ 85 mass parts plastics are fully mixed rear banburying with 15 ~ 25 mass parts rubber and plastics auxiliaries and obtain banburying plastics;
(2) carry out sintering after PVA glue, dispersant, defoamer and ferromagnetic oxide powder fully being mixed to obtain sintering magnetic;
(3) carry out vulcanization reaction after 85 ~ 95 mass parts sintering magnetics and 5 ~ 15 mass parts banburying plastics fully being mixed, open refining and obtain out refining powder;
(4) refining powder will be opened shaping.
7. method according to claim 6, is characterized in that, the temperature of described banburying is 120 ~ 140 DEG C, and the time of banburying is 10 ~ 15min.
8. method according to claim 6, is characterized in that, the temperature of described vulcanization reaction is 120 ~ 140 DEG C; The temperature opening refining is 90 ~ 100 DEG C, and the time of opening refining is 10 ~ 30min.
9. method according to claim 6, is characterized in that, the temperature of described sintering is 900 ~ 1200 DEG C, and the time of sintering is 1.5 ~ 2.5h.
10. method according to claim 6, is characterized in that, also comprises and sintering powder carried out ball milling and sieve with 80 ~ 180 order mesh screens after step (2), before the step (3); Also comprise after step (4) and move back reaction of Salmon-Saxl and cut shaping after moving back reaction of Salmon-Saxl.
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| CN201310718582.2A CN104733149A (en) | 2013-12-23 | 2013-12-23 | Bendable magnetic core and manufacturing method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106531391A (en) * | 2015-09-10 | 2017-03-22 | 介面光电股份有限公司 | Soft magnetic powder composition and manufacturing method for magnetic element |
| CN114242371A (en) * | 2021-12-27 | 2022-03-25 | 标旗磁电产品(佛冈)有限公司 | Nickel-zinc ferrite granule and preparation method and application thereof |
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| CN114242371A (en) * | 2021-12-27 | 2022-03-25 | 标旗磁电产品(佛冈)有限公司 | Nickel-zinc ferrite granule and preparation method and application thereof |
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Application publication date: 20150624 |