CN101552078A - Composite magnet - Google Patents
Composite magnet Download PDFInfo
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- CN101552078A CN101552078A CNA2009100000068A CN200910000006A CN101552078A CN 101552078 A CN101552078 A CN 101552078A CN A2009100000068 A CNA2009100000068 A CN A2009100000068A CN 200910000006 A CN200910000006 A CN 200910000006A CN 101552078 A CN101552078 A CN 101552078A
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- magnet
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- iron boron
- neodymium iron
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Abstract
The invention relates to a composite magnet (1), which consists of a neodymium iron boron magnet (2) and other magnets (4) in a self-absorption way; thermal insulating layers are arranged between the neodymium iron boron magnet (2) and other magnets; the composite magnet (1) has stable magnetic property, high temperature resistance and high magnetic field strength, and has the application advantages after combination that a plurality of superposed magnetic fields can be generated, density of line of magnetic force is high, and the power stroke is long, therefore, the high magnetic energy can be utilized to a greater degree and in wider range of fields, thus achieving the purposes of utilizing the high magnetic energy, saving energy and protecting the environment. The devices or equipments manufactured by utilizing the composite magnet (1) are widely applied and particularly can be applied at high temperature.
Description
Affiliated technical field
The present invention relates to a kind of built-up magnet, especially this built-up magnet can make full use of the advantage of various magnets, overcome the not defective of high-temperature resistant of magnetic is the strongest in the existing magnet neodymium iron boron magnetic body simultaneously, when practical application, can play splendid magnetization effect, the magnetization effect is further enhanced material.
Technical background
At present, known magnet has ferrimagnet, neodymium iron boron magnetic body, samarium cobalt magnet, alnico magnet, siderochrome cobalt magnet, soft magnetic bodies etc.Ferrimagnet remanent magnetism maximum is that 0.45T, maximum magnetic energy product are 120 ℃ of 40KJ/m3, high-temperature resistants, samarium cobalt magnet remanent magnetism maximum is that 1.1T, maximum magnetic energy product are 300 ℃ of 220KJ/m3, high-temperature resistants, alnico magnet remanent magnetism maximum is that 1.1T, maximum magnetic energy product are 550 ℃ of 50KJ/m3, high-temperature resistants, siderochrome cobalt magnet remanent magnetism maximum is that 1.1T, maximum magnetic energy product are 35KJ/m3, neodymium iron boron magnetic body remanent magnetism maximum be 1.45T, this moment maximum magnetic energy product be 260KJ/m3, heatproof only at 80 ℃, soft magnetic bodies promptly not heatproof, magnetic field intensity again a little less than.This shows magnetic property best be neodymium iron boron magnetic body, from various magnet performances, divide purposes different each have their own advantages.But the neodymium iron boron magnetic body residual magnetization can weaken greatly under hot conditions, other magnet also can only reach 1.1T (being higher than 300 ℃ of magnetic field intensitys can go down significantly) in 300 ℃ of following mximum residual magnetism intensity of high temperature, compared low 24% with the intensity of neodymium iron boron magnetic body remanent magnetism 1.45T, high magnetic energy is not fully utilized.For example, existing magnetizing assembly mainly is to be made of ferrite permanent-magnet or wherein a kind of single magnet of neodymium iron boron magnetic body, is to be difficult for demagnetization as the magnetizing assembly advantage of single use ferrite permanent magnet manufacturing, and shortcoming is a little less than the magnetic field intensity, non-refractory; The magnetizing assembly advantage of single utilization neodymium iron boron magnetic body manufacturing is magnetic field intensity strong (being the strongest magnet of magnetic field intensity in the present magnet) for another example, and shortcoming is that non-refractory is subjected to environmental influence easily and causes that magnetic field intensity weakens significantly.
The magnetic energy product of present international neodymium iron boron advanced production enterprise industrialized mass production Sintered NdFeB magnet reaches 398-414kJ/m
1(50-52MGOe), promptly reached the level of N50-N52, and the level of production of China Sintered NdFeB magnet enterprise is generally at 278 ~ 358kJ/m
1(35-45MGOe), belong to low-grade product, bigger with the advanced level gap.But, be bound in the near future reach international standards along with improving constantly of scientific and technological level.Therefore the neodymium iron boron magnetic body magnetic property also has very big potentiality to await utilizing.
Summary of the invention
In order to make full use of the advantage of various magnet performances.A kind of built-up magnet of the present invention, be the built-up magnet that utilizes neodymium iron boron and other any magnet (as ferrimagnet, samarium cobalt magnet, alnico magnet, siderochrome cobalt magnet, soft magnetic bodies etc.) self-priming together to constitute, can in the middle of neodymium iron boron and other magnet, add the built-up magnet that heat-barrier material forms the band thermal insulation layer when needed.Built-up magnet is to utilize the advantage of other magnet one side heatproof to contact with thermal source when using, thermal insulation layer can effectively avoid the neodymium ferromagnet directly to contact with thermal source, the loss that the magnetic property of having avoided neodymium iron boron magnetic body to cause because of being heated goes down and brings, can make other magnet can under the high-temperature condition, keep high-intensity magnetic field that material is carried out the hard magnetization acting for other magnet provides strong magnetic energy again simultaneously.Utilize neodymium iron boron magnetic body and soft magnetic bodies self-priming to constitute built-up magnet for another example together, can all suct soft magnetic bodies certainly on the two sides of neodymium iron boron magnetic body when needing, constituting the two sides is to be the built-up magnet of hard magnetic body in the middle of the soft magnetic bodies.When using, can avoid hard neodymium iron boron magnetic body to contact, can reduce the magnetic property loss that brings because of vibrations again, can the magnetic property of soft magnetic bodies is improved for the soft magnetic bodies body provides strong magnetic energy again simultaneously with material.Therefore, just can overcome existing magnet and be subjected to effects limit such as performance, make high magnetic characteristics obtain utilizing and magnetization acting effect is further enhanced in field widely.
Built-up magnet of the present invention, when using, can be provided with by the uniform magnetic field heteropolarity, the N utmost point meets the S utmost point or utmost point S and connects 1 to N self-priming of the N utmost point and constitute the magnetic border together, also the formation magnetic bottle can be combined in 1 to N magnetic border, being called " hard magnetization " advantage when using is to form a bigger high-intensity magnetic field, high temperature resistant; Built-up magnet of the present invention is provided with by same polarity magnetic field, the N utmost point connects the N utmost point or the S utmost point and connects 1 to N of the S utmost point and be superimposed and constitute polarity magnetic border, also 1 to N polarity magnetic border can be combined and constitute polarity stack porcelain vase, when using, be called " strong polarization ", advantage is can superpose to produce several polarity high-intensity magnetic fields, and magnetic intensity is big, density of line of magnetic force is big, work distance is far away, high temperature resistant.
The technical solution adopted for the present invention to solve the technical problems: be to utilize neodymium iron boron magnetic body and other any magnet self-priming together to constitute built-up magnet, can between these two kinds of magnets, add the built-up magnet that heat-barrier material constitutes the band thermal insulation layer when needed, also can all constitute built-up magnet on the two sides of neodymium iron boron magnetic body from sucting soft magnetic bodies, the size of built-up magnet, shape are what to determine as required, can be different shapes such as square, rectangle, circle, ellipse, watt type.
Purposes example: utilize a kind of built-up magnet of the present invention to be superimposed and use in the combustion reaction field, on the boiler that with fine coal is fuel, use exactly, promptly after raw coal is pulverized ball milling formation fine coal, be delivered on this segment pipe of burner at fine coal, high-intensity magnetic field that built-up magnet that utilization is superimposed produces or strong polarization field carry out hard magnetization or strong polarization is handled to the fine coal of high temperature.Usually fine coal need be heated to before combustion reaction about 350 ℃, is carrying out combustion reaction to furnace injection, and therefore general magnetizing assembly can't magnetize processing to the fine coal of high temperature, utilizes high temperature resistant magnet also can't reach the utilization of high magnetic characteristics.Because built-up magnet is a plurality of strong stack magnetic fields that are superimposed and produce, and has high temperature resistant and advantage that magnetic field intensity is big, density of line of magnetic force is big, work distance is far away.Therefore; can make pulverized coal fuel before combustion reaction, under hot conditions, be in the excited state of a kind of hard magnetization or strong polarization; electronics in molecule and the atom played excite, transition; make molecule can carry additional excess energy and participate in reaction; because having participated in reaction, height magnetic energy makes the more abundant of fine coal reaction; yet can in the stove, smoke pipe, flue are former plays certain cleaning effect and keep clean with the black dirt that forms; improve the heat efficiency, thereby reach height utilization of saving the energy and magnetic energy and the purpose of protecting environment.
A kind of built-up magnet of the present invention has that high temperature resistant, remanent magnetism is big, stable performance, and Applicable temperature is at-30 ℃ to 600 ℃, and stack combinations is used together and can be formed high-intensity magnetic field, material is had advantages such as good magnetization or polarization effect.Can utilize a kind of built-up magnet of the present invention to manufacture device or equipment, can be extensively in sector applications such as medication chemistry, petrochemical industry, oil refining, electric power, metallurgy.
Description of drawings
The invention will be further described below in conjunction with drawings and Examples.
Fig. 1 is composite magnet structure figure.
1. is built-up magnets among the figure, 2. is neodymium iron boron magnetic bodies, 3. is thermal insulation layers, 4. is samarium cobalt magnet or alnico magnet or high temperature resistant magnets such as siderochrome cobalt magnet or ferrimagnet.
Concrete execution mode
In Fig. 1, built-up magnet (1) constitutes by neodymium iron boron magnetic body (2) and samarium cobalt magnet or with alnico magnet or with siderochrome cobalt magnet or with wherein a kind of magnet self-priming of high temperature resistant magnet (4) such as ferrimagnet together, can add heat-barrier material when needed and constitute the built-up magnet (1) of being with thermal insulation layer (3) between neodymium iron boron magnetic body (2) and other magnet.Can certainly utilize neodymium iron boron magnetic body (2) and plastics soft magnetic bodies or rubber soft magnetic bodies self-priming to constitute built-up magnet (1) together, can also all suct plastics soft magnetic bodies or rubber soft magnetic bodies certainly on the two sides of neodymium iron boron magnetic body (2) when needed, constituting the two sides is to be the built-up magnet (1) of hard magnetic body in the middle of the soft magnetic bodies.
The shape of built-up magnet (1) can be different shapes such as square, rectangle, circle, ellipse, watt type, and the size of built-up magnet is to determine as required.Can utilize built-up magnet (1) to manufacture device or equipment use.
Claims (5)
1. a kind of built-up magnet of the present invention, it is characterized in that: be the built-up magnet (1) that together is made of neodymium iron boron magnetic body (2), thermal insulation layer (3), alnico magnet (4) order self-priming, heat-barrier material is to be added in the thermal insulation layer (3) that forms in the middle of neodymium iron boron magnetic body (2) and the alnico magnet (4).
2. a kind of built-up magnet according to claim 1, it is characterized in that: built-up magnet (1) can be made of neodymium iron boron magnetic body (2) and samarium cobalt magnet self-priming together, also can constitute by neodymium iron boron magnetic body (2) and siderochrome cobalt magnet self-priming together, can also constitute by neodymium iron boron magnetic body (2) and ferrimagnet self-priming together, more can be by neodymium iron boron magnetic body (2) and plastics soft magnetic bodies, rubber soft magnetic bodies self-priming constitutes together, and also can all suct soft magnetic bodies formation two sides on the two sides of neodymium iron boron magnetic body (2) certainly is to be the built-up magnet (1) of Hard Magnetic in the middle of the soft magnetic bodies.
3. a kind of built-up magnet according to claim 1 is characterized in that, the shape of built-up magnet (1) can be square, rectangle, ellipse, circle, rhombus, trapezoidal, watt type.
4. a kind of built-up magnet according to claim 1 is characterized in that: the heat-barrier material that thermal insulation layer (3) adopts can be good, resistant to elevated temperatures, fire-resistant material of heat-proof quality and coating.
5. a kind of built-up magnet according to claim 1 is characterized in that: can utilize built-up magnet (1) to manufacture device, equipment use.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009100000068A CN101552078A (en) | 2009-01-04 | 2009-01-04 | Composite magnet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009100000068A CN101552078A (en) | 2009-01-04 | 2009-01-04 | Composite magnet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101552078A true CN101552078A (en) | 2009-10-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2009100000068A Pending CN101552078A (en) | 2009-01-04 | 2009-01-04 | Composite magnet |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103021610A (en) * | 2011-09-26 | 2013-04-03 | 东莞市炫耀电子有限公司 | Novel composite permanent-magnetic material and manufacturing method thereof |
| CN103839669A (en) * | 2014-02-28 | 2014-06-04 | 厦门钨业股份有限公司 | Composite magnet manufacturing method using neodymium iron boron magnetic sheets |
| CN104157387A (en) * | 2014-08-18 | 2014-11-19 | 钢铁研究总院 | Permanent magnetic ring component and manufacturing method thereof |
| CN105006326A (en) * | 2015-07-27 | 2015-10-28 | 北京工业大学 | NdFeB/SmCo5 multi-layer composite rare earth permanent magnet and SPS hot-pressing preparation method |
| CN108987011A (en) * | 2017-06-01 | 2018-12-11 | 宜宾金原复合材料有限公司 | Compound bonded permanent magnet |
-
2009
- 2009-01-04 CN CNA2009100000068A patent/CN101552078A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103021610A (en) * | 2011-09-26 | 2013-04-03 | 东莞市炫耀电子有限公司 | Novel composite permanent-magnetic material and manufacturing method thereof |
| US9048016B2 (en) | 2011-09-26 | 2015-06-02 | Dongguan Xuanyao Electronics Co., Ltd. | Composite permanent magnetic material and preparation method thereof |
| CN103021610B (en) * | 2011-09-26 | 2015-12-02 | 东莞市炫耀电子有限公司 | A kind of Novel composite permanent-magnetic material and preparation method thereof |
| CN103839669A (en) * | 2014-02-28 | 2014-06-04 | 厦门钨业股份有限公司 | Composite magnet manufacturing method using neodymium iron boron magnetic sheets |
| CN103839669B (en) * | 2014-02-28 | 2016-06-29 | 厦门钨业股份有限公司 | With the method that ndfeb disk manufactures built-up magnet |
| CN104157387A (en) * | 2014-08-18 | 2014-11-19 | 钢铁研究总院 | Permanent magnetic ring component and manufacturing method thereof |
| CN105006326A (en) * | 2015-07-27 | 2015-10-28 | 北京工业大学 | NdFeB/SmCo5 multi-layer composite rare earth permanent magnet and SPS hot-pressing preparation method |
| CN108987011A (en) * | 2017-06-01 | 2018-12-11 | 宜宾金原复合材料有限公司 | Compound bonded permanent magnet |
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Open date: 20091007 |