CN105957685A - Permanent magnet for loudspeaker and preparation method thereof - Google Patents
Permanent magnet for loudspeaker and preparation method thereof Download PDFInfo
- Publication number
- CN105957685A CN105957685A CN201610398864.2A CN201610398864A CN105957685A CN 105957685 A CN105957685 A CN 105957685A CN 201610398864 A CN201610398864 A CN 201610398864A CN 105957685 A CN105957685 A CN 105957685A
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- CN
- China
- Prior art keywords
- loudspeaker
- blank
- magnet
- permanent magnet
- preparation
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F7/00—Magnets
- H01F7/02—Permanent magnets [PM]
- H01F7/0273—Magnetic circuits with PM for magnetic field generation
- H01F7/0289—Transducers, loudspeakers, moving coil arrangements
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
- H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
- H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
- H01F1/032—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials
- H01F1/04—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys
- H01F1/047—Alloys characterised by their composition
- H01F1/053—Alloys characterised by their composition containing rare earth metals
- H01F1/055—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5
- H01F1/057—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B
- H01F1/0571—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B in the form of particles, e.g. rapid quenched powders or ribbon flakes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
- H01F41/0253—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing permanent magnets
- H01F41/0266—Moulding; Pressing
Abstract
The invention provides a permanent magnet for a loudspeaker. The permanent magnet is prepared from the following components in percentages by weight: 1.5%-2.5% of neodymium, 2.1%-3.5% of titanium, 3%-7% of boron, 0-3% of yttrium-iron alloy, 1%-8% of kaolin and the balance of ferric oxide. A preparation method thereof comprises the five steps of material mixing, oxidation treatment, static pressure molding, roasting processing and abrasive machining. The permanent magnet is simple in technology, low in production condition requirement and relatively low in raw material cost compared with a traditional magnet, so that the preparation for magnet production can be developed flexibly and efficiently, and the production cost of the magnet is reduced; meanwhile, the density and structural strength of the magnet are effectively improved, the crystallite stability inside the magnet is good, the maximum magnetic energy product is high, and the coercive force of magnetic induction is high, so that the service life of the loudspeaker can be effectively prolonged, the sound quality effect of the loudspeaker is improved, and the quality of the loudspeaker is improved.
Description
Technical field
The present invention relates to a kind of permanent magnet for loudspeaker and preparation method, belong to permanent magnet production technical field.
Background technology
In speaker, one of its internal permanent magnet visual plant being to ensure that speaker operation performance, because of
The serviceability of this magnet directly affects the serviceability of speaker, but finds in actual use, currently
The magnet that used of speaker mostly be magnet based on ferrum oxide material, although speaker can be met and use
Needs and use cost and cost of manufacture cheap, but current iron oxide magnetic body density and structural strength are relatively
Little, magnet internal grain stability is bad, and the coercivity of maximum magnetic energy product and magnetic strength is relatively low, is therefore raising one's voice
After device life-time service, the magnetic of ferrum oxide magnet declines substantially and rapid, thus has had a strong impact on speaker
Service life and serviceability, for this problem, currently develop except Novel magnetic body based on rare earth material,
Although this magnet can effectively overcome the ferromagnetic numerous deficiencies of conventional oxidation, but the magnet of rare earth material is raw
Production. art is complicated, and production cost and cost of material are the highest, and the most actually used ability is extremely limited, therefore
Also in the urgent need to developing a kind of brand-new speaker magnet and preparation technology thereof to meet actually used need
Want.
Summary of the invention
It is an object of the invention to provide the present invention and a kind of permanent magnet for loudspeaker and preparation method are provided.
In order to achieve the above object, the present invention provides following technical scheme:
A kind of permanent magnet for loudspeaker, between each component and component, mass ratio is: neodymium 1.5%-2.5%, titanium 2.1%
-3.5%, boron 3%-7%, yttrium iron alloy 0-3%, Kaolin 1%-8%, surplus is ferrum oxide.
In the present embodiment, the iron ion ferrous ion of described ferrum oxide and ferric ion mixing, wherein
When described ferrous ion and ferric ion mixing, ferrous ion and the proportionate relationship of ferric ion
It is 1: 1-1: 5.
Further, described neodymium, titanium, boron, yttrium iron alloy, Kaolin and ferrum oxide is powder knot
Structure, and granularity is 40-200 mesh.
The preparation method of a kind of permanent magnet for loudspeaker, comprises the steps:
The first step, material mixes, and adds neodymium, titanium, boron, yttrium iron conjunction the most in proportion in croci
Gold and Kaolin, and be thoroughly mixed uniformly；
Second step, oxidation processes, the oxygen that the raw material mixed mixing purity is not less than 70% is together passed through oxygen
Carrying out high temperature oxidation process in changing stove, oxidizing temperature is 300-500 DEG C, and oxidation treatment time is that 10-30 divides
Clock；
3rd step, hydrostatic profile, to adding bonding agent in the raw material of oxidation processes and being sufficiently mixed, so
After utilize mould and die casting equipment that raw material is carried out pressure to build up shape, it is thus achieved that magnet blank, and build up type through overvoltage
Blank separately carried out static pressure Ageing Treatment by balancing weight, balancing weight weight is pressure when building up type 1-3 times of pressure,
Static pressure Ageing Treatment separately carries out natural drying process to blank simultaneously, and dried blank water content is not more than 10%,
And after blank has been dried, stop static pressure Ageing Treatment again；
4th step, roasting is processed, and is sent in roaster by the blank through hydrostatic profile, is sintered it
Processing, wherein sintering temperature is 500 DEG C-1800 DEG C, and roasting time is 3-15 hour, separately makes hair after roasting
Base naturally cools to room temperature；
5th step, grinding, the blank surface processed through roasting is carried out sanding and polishing process, and
Sanding and polishing processes simultaneously, remains that blank surface temperature is not higher than 20 DEG C.
Further, in the 3rd described step, before being added bonding agent, first to oxidation processes after
Raw material carries out Shape correction.
Present invention process is simple, and working condition requires low, and cost of material the most relatively conventional magnet relative moderate,
Thus can help to flexible and efficient carry out magnet generation preparation work, and the production contributing to reducing magnet becomes
This, simultaneously, separately effectively raise magnet density and structural strength, magnet internal grain good stability,
Maximum magnetic energy product is high, and the coercivity of magnetic strength is strong, thus can effectively improve service life and the tonequality of speaker
Effect, is favorably improved the quality of speaker.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to enforcement
In example or description of the prior art, the required accompanying drawing used is briefly described, it should be apparent that, describe below
In accompanying drawing be only some embodiments of the present invention, for those of ordinary skill in the art, do not paying
On the premise of going out creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the inventive method flow chart；
Detailed description of the invention
Technical scheme is clearly and completely described by the accompanying drawing below in conjunction with the present invention, aobvious
So, described embodiment is only a part of embodiment of the present invention rather than whole embodiments.Based on
Embodiment in the present invention, those of ordinary skill in the art are obtained under not making creative work premise
Every other embodiment, broadly fall into the scope of protection of the invention.
Embodiment 1
A kind of permanent magnet for loudspeaker as shown in Figure 1, between each component and component, mass ratio is: neodymium 1.5%,
Titanium 3%, boron 5%, Kaolin 3%, surplus is ferrum oxide.
In the present embodiment, the iron ion of described ferrum oxide is ferrous ion and ferric ion mixing, its
The proportionate relationship of middle ferrous ion and ferric ion is 1: 2.
In the present embodiment, described neodymium, titanium, boron, Kaolin and ferrum oxide are floury structure, and grain
Degree is 90 mesh.
The preparation method of a kind of permanent magnet for loudspeaker, comprises the steps:
The first step, material mixes, and adds neodymium, titanium, boron and Kaolin the most in proportion in croci,
And be thoroughly mixed uniformly；
Second step, oxidation processes, the oxygen that the raw material mixed mixing purity is 80% is together passed through oxidation furnace
Inside carrying out high temperature oxidation process, oxidizing temperature is 350 DEG C, and oxidation treatment time is 30 minutes；
3rd step, hydrostatic profile, to adding bonding agent in the raw material of oxidation processes and being sufficiently mixed, so
After utilize mould and die casting equipment that raw material is carried out pressure to build up shape, it is thus achieved that magnet blank, and build up type through overvoltage
Blank separately carried out static pressure Ageing Treatment by balancing weight, balancing weight weight is pressure when building up type 2 times of pressure,
Static pressure Ageing Treatment separately carries out natural drying process to blank simultaneously, and dried blank water content is 8%, and works as
Blank stops static pressure Ageing Treatment after being dried again；
4th step, roasting is processed, and is sent in roaster by the blank through hydrostatic profile, is sintered it
Processing, adds man-hour carrying out roasting, first blank carries out the high-temperature roasting of 1100 DEG C, and roasting time is
It is 2 hours, then at the low-temperature bake of carry out 4 hours 750 DEG C, after low-temperature bake, separately makes blank the coldest
But to room temperature；
5th step, grinding, the blank surface processed through roasting is carried out sanding and polishing process, and
Sanding and polishing processes simultaneously, remains that blank surface temperature is 10 DEG C.
In the present embodiment, in the 3rd described step, before being added bonding agent, first to oxidation processes after
Raw material carry out Shape correction.
Embodiment 2
A kind of permanent magnet for loudspeaker as shown in Figure 1, between each component and component, mass ratio is: neodymium 1.5%,
Titanium 3%, boron 5%, yttrium iron alloy 3%, Kaolin 3%, surplus is ferrum oxide.
In the present embodiment, the iron ion of described ferrum oxide is ferrous ion and ferric ion mixing, its
The proportionate relationship of middle ferrous ion and ferric ion is 1: 2.
In the present embodiment, described neodymium, titanium, boron, Kaolin, yttrium iron alloy and ferrum oxide are powder
Structure, and granularity is 100 mesh.
The preparation method of a kind of permanent magnet for loudspeaker, comprises the steps:
The first step, material mixes, and adds neodymium, titanium, boron, yttrium iron conjunction the most in proportion in croci
Gold and Kaolin, and be thoroughly mixed uniformly；
Second step, oxidation processes, the oxygen that the raw material mixed mixing purity is 80% is together passed through oxidation furnace
Inside carrying out high temperature oxidation process, oxidizing temperature is 400 DEG C, and oxidation treatment time is 30 minutes；
3rd step, hydrostatic profile, to adding bonding agent in the raw material of oxidation processes and being sufficiently mixed, so
After utilize mould and die casting equipment that raw material is carried out pressure to build up shape, it is thus achieved that magnet blank, and build up type through overvoltage
Blank separately carried out static pressure Ageing Treatment by balancing weight, balancing weight weight is pressure when building up type 3 times of pressure,
Static pressure Ageing Treatment separately carries out natural drying process to blank simultaneously, and dried blank water content is 3%, and works as
Blank stops static pressure Ageing Treatment after being dried again；
4th step, roasting is processed, and is sent in roaster by the blank through hydrostatic profile, is sintered it
Processing, adds man-hour carrying out roasting, first blank carries out the high-temperature roasting of 1400 DEG C, and roasting time is
It is 3 hours, then at the low-temperature bake of carry out 5 hours 800 DEG C, after low-temperature bake, separately makes blank the coldest
But to room temperature；
5th step, grinding, the blank surface processed through roasting is carried out sanding and polishing process, and
Sanding and polishing processes simultaneously, remains that blank surface temperature is 15 DEG C.
In the present embodiment, in the 3rd described step, before being added bonding agent, first to oxidation processes after
Raw material carry out Shape correction.
Present invention process is simple, and working condition requires low, and cost of material the most relatively conventional magnet relative moderate,
Thus can help to flexible and efficient carry out magnet generation preparation work, and the production contributing to reducing magnet becomes
This, simultaneously, separately effectively raise magnet density and structural strength, magnet internal grain good stability,
Maximum magnetic energy product is high, and the coercivity of magnetic strength is strong, thus can effectively improve service life and the tonequality of speaker
Effect, is favorably improved the quality of speaker.
The above, the only detailed description of the invention of the present invention, but protection scope of the present invention is not limited to
This, any those familiar with the art, in the technical scope that the invention discloses, can readily occur in
Change or replacement, all should contain within protection scope of the present invention.Therefore, protection scope of the present invention should
Described it is as the criterion with scope of the claims.
Claims (5)
1. a permanent magnet for loudspeaker, it is characterised in that: in described permanent magnet for loudspeaker each component and
Between component, mass ratio is: neodymium 1.5%-2.5%, titanium 2.1%-3.5%, boron 3%-7%, yttrium iron alloy 0-3%,
Kaolin 1%-8%, surplus is ferrum oxide.
A kind of permanent magnet for loudspeaker the most according to claim 1, it is characterised in that: described oxidation
The iron ion of ferrum is ferrous ion, ferric ion or ferrous ion and ferric ion mixing, wherein
When described ferrous ion and ferric ion mixing, ferrous ion and the proportionate relationship of ferric ion
It is 1: 1-1: 5.
A kind of permanent magnet for loudspeaker the most according to claim 1, it is characterised in that: described neodymium,
Titanium, boron, yttrium iron alloy, Kaolin and ferrum oxide are floury structure, and granularity is 40-200 mesh.
4. the preparation method of a permanent magnet for loudspeaker, it is characterised in that: described preparation method include as
Lower step:
The first step, material mixes, and adds neodymium, titanium, boron, yttrium iron conjunction the most in proportion in croci
Gold and Kaolin, and be thoroughly mixed uniformly；
Second step, oxidation processes, the oxygen that the raw material mixed mixing purity is not less than 70% is together passed through oxygen
Carrying out high temperature oxidation process in changing stove, oxidizing temperature is 300-500 DEG C, and oxidation treatment time is that 10-30 divides
Clock；
3rd step, hydrostatic profile, to adding bonding agent in the raw material of oxidation processes and being sufficiently mixed, so
After utilize mould and die casting equipment that raw material is carried out pressure to build up shape, it is thus achieved that magnet blank, and build up type through overvoltage
Blank separately carried out static pressure Ageing Treatment by balancing weight, balancing weight weight is pressure when building up type 1-3 times of pressure,
Static pressure Ageing Treatment separately carries out natural drying process to blank simultaneously, and dried blank water content is not more than 10%,
And after blank has been dried, stop static pressure Ageing Treatment again；
4th step, roasting is processed, and is sent in roaster by the blank through hydrostatic profile, is sintered it
Processing, middle sintering temperature is 500 DEG C-1800 DEG C, and roasting time is 3-15 hour, separately makes blank after roasting
Naturally cool to room temperature；
5th step, grinding, the blank surface processed through roasting is carried out sanding and polishing process, and
Sanding and polishing processes simultaneously, remains that blank surface temperature is not higher than 20 DEG C.
A kind of permanent magnet for loudspeaker the most according to claim 4 and preparation method, it is characterised in that:
In the 3rd described step, before being added bonding agent, first the raw material after oxidation processes is carried out at shaping
Reason.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610398864.2A CN105957685A (en) | 2016-05-30 | 2016-05-30 | Permanent magnet for loudspeaker and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610398864.2A CN105957685A (en) | 2016-05-30 | 2016-05-30 | Permanent magnet for loudspeaker and preparation method thereof |
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|---|---|
| CN105957685A true CN105957685A (en) | 2016-09-21 |
Family
ID=56908748
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610398864.2A Pending CN105957685A (en) | 2016-05-30 | 2016-05-30 | Permanent magnet for loudspeaker and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107068318A (en) * | 2017-03-24 | 2017-08-18 | 合肥羿振电力设备有限公司 | It is a kind of for magnetic material of transformer and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103700463A (en) * | 2013-11-30 | 2014-04-02 | 宁波科星材料科技有限公司 | Permanent magnet for loudspeaker and processing technology thereof |
| CN104321838A (en) * | 2012-02-23 | 2015-01-28 | 吉坤日矿日石金属株式会社 | Neodymium-based rare-earth permanent magnet and process for producing same |
| CN105023691A (en) * | 2015-07-23 | 2015-11-04 | 南通保来利轴承有限公司 | Iron oxide based anti-electromagnetic interference magnet material and preparation method |
| CN105070443A (en) * | 2015-07-23 | 2015-11-18 | 南通保来利轴承有限公司 | Bonded magnet and preparation method |
| CN105374543A (en) * | 2015-12-03 | 2016-03-02 | 湖南航天磁电有限责任公司 | Preparation method for bonding NdFeB-ferrite permanent magnet |
-
2016
- 2016-05-30 CN CN201610398864.2A patent/CN105957685A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104321838A (en) * | 2012-02-23 | 2015-01-28 | 吉坤日矿日石金属株式会社 | Neodymium-based rare-earth permanent magnet and process for producing same |
| CN103700463A (en) * | 2013-11-30 | 2014-04-02 | 宁波科星材料科技有限公司 | Permanent magnet for loudspeaker and processing technology thereof |
| CN105023691A (en) * | 2015-07-23 | 2015-11-04 | 南通保来利轴承有限公司 | Iron oxide based anti-electromagnetic interference magnet material and preparation method |
| CN105070443A (en) * | 2015-07-23 | 2015-11-18 | 南通保来利轴承有限公司 | Bonded magnet and preparation method |
| CN105374543A (en) * | 2015-12-03 | 2016-03-02 | 湖南航天磁电有限责任公司 | Preparation method for bonding NdFeB-ferrite permanent magnet |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107068318A (en) * | 2017-03-24 | 2017-08-18 | 合肥羿振电力设备有限公司 | It is a kind of for magnetic material of transformer and preparation method thereof |
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Application publication date: 20160921 |