CN107845474A - A kind of insulation full-inorganic adhesive and its application method for metal soft magnetic powder core - Google Patents
A kind of insulation full-inorganic adhesive and its application method for metal soft magnetic powder core Download PDFInfo
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- CN107845474A CN107845474A CN201711335145.7A CN201711335145A CN107845474A CN 107845474 A CN107845474 A CN 107845474A CN 201711335145 A CN201711335145 A CN 201711335145A CN 107845474 A CN107845474 A CN 107845474A
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- 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
- H01F1/12—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 soft-magnetic materials
- H01F1/14—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 soft-magnetic materials metals or alloys
- H01F1/20—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 soft-magnetic materials metals or alloys in the form of particles, e.g. powder
- H01F1/22—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 soft-magnetic materials metals or alloys in the form of particles, e.g. powder pressed, sintered, or bound together
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Abstract
The present invention discloses a kind of insulation full-inorganic adhesive for metal soft magnetic powder core, belongs to the preparing technical field of magnetic material.The insulation full-inorganic adhesive is made up of borate, silicate, alumino-silicate and quartz, and its quality group turns into：Borate, 48~70%；Silicate, 5~8wt%；Alumino-silicate, 20~40wt%；Silica flour, 2~8wt%；The borate is anhydrous sodium tetraborate powder；The silicate is sodium metasilicate powder；The alumino-silicate is two or more in talcum powder, kaolin, albite, mica, potassium feldspar.Full-inorganic insulating adhesive of the present invention, heat resisting temperature reach 1000 DEG C, can significantly improve the mechanical strength of powder core, and the powder core of preparation has comprehensive excellent magnetic performance and mechanical property.Present invention is particularly suitable for iron-based powder core, can increase substantially its high frequency performance and quality factor.
Description
Technical field
The invention belongs to the preparing technical field of magnetic material, and in particular to a kind of insulation of magnetically soft alloy powder core completely without
Machine adhesive and its application method.
Background technology
Metal soft magnetic powder core is compressing after soft-magnetic alloy powder is well mixed with insulating compound, adhesive, and through overheat
A kind of compound soft magnetic material for handling and obtaining.Metal soft magnetic powder core because with higher magnetic flux density, high magnetic conductivity and
By extensive use.Insulating adhesive to powder core act as increase magnetic powder particle mobility, reinforced insulation effect and
Improve the mechanical property of powder core.
Binding agent is divided into organic and inorganic.Organic includes phenolic resin, epoxy resin and silicones etc., energy and magnetic
Powder has preferable adhesive property.But organic binder bond non-refractory, decomposed below 400 DEG C, insulation effect is broken between particle
It is bad so that the loss of powder core is higher.Inorganic binding agent includes phosphate, waterglass etc., has preferable bonding with powder core
Performance.But phosphate water resistance is poor, in the environment of high humidity, magnetic core performance changes；Waterglass is strong basicity,
Magnetic wicking surface easily analyses alkali, influences its mechanics and magnetic performance.
The content of the invention
For overcome the deficiencies in the prior art, it is an object of the invention to provide a kind of insulation for metal soft magnetic powder core completely without
Machine adhesive and its application method, applied widely to its, well and can makes powder core simultaneously for bond effect and insulation effect
Mechanical property improves.
To achieve these goals, the present invention is achieved by the following technical programs.
A kind of insulation full-inorganic adhesive for metal soft magnetic powder core of the invention, it is by borate, silicate, aluminosilicate
Salt and silica flour composition, its quality composition are as follows：
Further, the borate is anhydrous sodium tetraborate powder；The silicate is sodium metasilicate powder；The sial
Hydrochlorate is two or more in talcum powder, kaolin, albite, mica, potassium feldspar.
Invention also provides the application method of above-mentioned insulation full-inorganic adhesive, specifically comprise the following steps：
1) weighed by above-mentioned quality composition, blended, grinding, must insulate full-inorganic binding agent powder, its powder particle size 1~
In 3 μ ms.
2) soft-magnetic powder is passivated, surface is formed one layer of passivating film, weigh the insulation full-inorganic that step (1) obtains
Binding agent powder is mixed with, and after shaping is heat-treated, obtains soft magnetic-powder core.
The 0.5~2.5% of the soft-magnetic powder quality that the quality of the insulation full-inorganic binding agent powder is accounted for after passivation.
Further, the soft-magnetic powder of the step (2) is ferrous metals magnetic.
The principles of science of the present invention：
The present invention uses full-inorganic insulating adhesive, forms eutectic point at low temperature, liquid phase occurs.At powder core heat
During reason, the fusing of a small amount of binding agent, the space of one side liquid underfill powder core so that powder core is finer and close.Liquid
Powder core intensity increases substantially after cooling；On the other hand, liquid adhesive uniformly wraps up magnetic surface, reinforced insulation under high temperature
Effect, further reduce intergranular eddy-current loss.
Compared with prior art, the present invention has following technique effect：
1st, instant invention overcomes organic binder bond non-refractory, insulation effect is destroyed between particle after decomposition, powder core
The shortcomings that higher is lost, while also overcomes the powder core using other inorganic binders not water-fast or the spies such as mechanical property is not up to standard
Property.
2nd, the present invention uses full-inorganic insulating adhesive, and heat resisting temperature reaches 1000 DEG C, significantly improves the mechanics of powder core
Intensity, the powder core of preparation have comprehensive excellent magnetic performance and mechanical property.
3rd, present invention is particularly suitable for iron-based powder core, its high frequency performance and quality factor can be increased substantially.
Embodiment
The present invention is described in detail below in conjunction with specific embodiment, but the present invention is not limited to following embodiments.
Embodiment 1
1) by the iron sial after anhydrous sodium tetraborate of the granularity less than 3 microns, sodium metasilicate, mica, albite and passivation
Metal powder mixes, and wherein inorganic binder accounts for the 2.0% of magnetic gross mass.The quality group of inorganic binder turns into：Anhydrous four boron
Sour sodium accounts for 50wt%, and sodium metasilicate accounts for 6wt%, and mica accounts for 20wt%, albite 20wt%, silica flour 4wt%.Add metal simultaneously
Magnetic gross mass 0.3wt% stearic acid release agent zinc.
2) annular base substrate is made in well mixed powder.Annular base substrate size is：External diameter 26.9mm, internal diameter 14.73mm are high
For 11.15mm.Annular base substrate is heat-treated in nitrogen atmosphere, and cooling obtains Fe-Si-Al magnetic core.
Final obtained Fe-Si-Al magnetic core parallel sample is tested three times, performance is as shown in table 1：
Embodiment 2
1) by anhydrous sodium tetraborate of the granularity less than 3 microns, sodium metasilicate, kaolin, talcum, quartz and the iron after passivation
Sial metal powder mixes, and wherein inorganic binder accounts for the 2.2% of magnetic gross mass.The quality group of inorganic binder turns into：It is anhydrous
Sodium tetraborate accounts for 60wt%, and sodium metasilicate accounts for 6wt%, and mica accounts for 15wt%, potassium feldspar 6, and kaolin accounts for 9wt%, silica flour
4wt%.Magnetic gross mass 0.3wt% stearic acid release agent zinc is added simultaneously.
2) well mixed powder compacting circularizes base substrate.Annular base substrate size is：External diameter 33.00mm, internal diameter 19.90mm,
A height of 10.67mm.Annular base substrate is heat-treated in nitrogen atmosphere, obtains Fe-Si-Al magnetic core.To final obtained iron sial magnetic
Powder core parallel sample is tested three times, and performance is as shown in table 2：
Embodiment 3
1) by anhydrous sodium tetraborate of the granularity less than 3 microns, sodium metasilicate, kaolin, talcum, quartz and the iron after passivation
Silicon metal powder mixes, and wherein inorganic binder accounts for the 2.2% of magnetic gross mass.The quality group of inorganic binder turns into：Anhydrous four
Boratex accounts for 65wt%, and sodium metasilicate accounts for 7wt%, and kaolin accounts for 10wt%, talcum 10wt%, silica flour 8wt%.Add magnetic simultaneously
Powder gross mass 0.3wt% stearic acid release agent zinc.
2) well mixed pressed by powder circularizes base substrate.Annular base substrate size is：External diameter 17.27mm, internal diameter 9.65mm,
A height of 6.35mm.Annular base substrate is heat-treated in nitrogen atmosphere, and cooling obtains iron silica magnetic particle core.
Final obtained iron silica magnetic particle core parallel sample is tested three times, performance is as shown in table 3：
Claims (6)
1. a kind of insulation full-inorganic adhesive for metal soft magnetic powder core, it is characterised in that the full-inorganic adhesive is by boric acid
Salt, silicate, alumino-silicate and silica flour composition, its quality composition are as follows：
2. insulation full-inorganic adhesive as claimed in claim 1, it is characterised in that the borate is anhydrous tetraboric acid sodium powder
End.
3. insulation full-inorganic adhesive as claimed in claim 1, it is characterised in that the silicate is sodium metasilicate powder.
4. insulation full-inorganic adhesive as claimed in claim 1, it is characterised in that the alumino-silicate is talcum powder, kaolinite
Two or more in soil, albite, mica, potassium feldspar.
5. the application method of insulation full-inorganic adhesive as claimed in claim 1, it is characterised in that comprise the following steps：
1) quality composition weighs as described in claim 1, and blended, grinding, must insulate full-inorganic binding agent powder, its powder particle size
In 1~3 μ m；
2) soft-magnetic powder is passivated, surface is formed one layer of passivating film, weigh the insulation full-inorganic bonding that step (1) obtains
Agent powder is mixed with, and after shaping is heat-treated, obtains soft magnetic-powder core；
The 0.5~2.5% of the soft-magnetic powder quality that the quality of the insulation full-inorganic binding agent powder is accounted for after passivation.
6. according to claim 5 insulate full-inorganic adhesive application method, it is characterised in that the step (2) it is soft
Magnetic magnetic is ferrous metals magnetic.
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| CN201711335145.7A CN107845474B (en) | 2017-12-14 | 2017-12-14 | A kind of insulation full-inorganic adhesive and its application method for metal soft magnetic powder core |
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| CN201711335145.7A CN107845474B (en) | 2017-12-14 | 2017-12-14 | A kind of insulation full-inorganic adhesive and its application method for metal soft magnetic powder core |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113185264A (en) * | 2021-05-05 | 2021-07-30 | 许昌市森洋电子材料有限公司 | Method for manufacturing porcelain plate with firmly connected conducting strips and refrigerating element |
| DE102021206392A1 (en) | 2021-06-22 | 2022-12-22 | Bruker Biospin Gmbh | Autonomous cooldown of a superconducting, dry-cooled MR magnet coil system |
| CN117079967A (en) * | 2023-10-16 | 2023-11-17 | 通友微电(四川)有限公司 | Composite ceramic soft magnetic powder and preparation method thereof |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102022204476A1 (en) | 2022-05-06 | 2023-11-09 | Bruker Biospin Gmbh | Autonomous current loading of a superconducting, dry-cooled MR magnetic coil system |
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| CN1923910A (en) * | 2005-08-31 | 2007-03-07 | 宝山钢铁股份有限公司 | Fire resistant water-based self-adhesion coating |
| CN104031601A (en) * | 2014-05-28 | 2014-09-10 | 浙江大学 | Insulative adhesive for preparing metallic and soft magnetic composite material and using method thereof |
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| CN1923910A (en) * | 2005-08-31 | 2007-03-07 | 宝山钢铁股份有限公司 | Fire resistant water-based self-adhesion coating |
| CN104031601A (en) * | 2014-05-28 | 2014-09-10 | 浙江大学 | Insulative adhesive for preparing metallic and soft magnetic composite material and using method thereof |
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| 魏尚宝: "新型无机粘合剂对磁粉芯软磁性能影响", 《中国优秀硕士学位论文全文数据库工程科技II辑》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113185264A (en) * | 2021-05-05 | 2021-07-30 | 许昌市森洋电子材料有限公司 | Method for manufacturing porcelain plate with firmly connected conducting strips and refrigerating element |
| CN113185264B (en) * | 2021-05-05 | 2024-03-01 | 许昌市森洋电子材料有限公司 | Method for manufacturing porcelain plate with conductive sheet firmly connected and refrigerating piece |
| DE102021206392A1 (en) | 2021-06-22 | 2022-12-22 | Bruker Biospin Gmbh | Autonomous cooldown of a superconducting, dry-cooled MR magnet coil system |
| CN117079967A (en) * | 2023-10-16 | 2023-11-17 | 通友微电(四川)有限公司 | Composite ceramic soft magnetic powder and preparation method thereof |
| CN117079967B (en) * | 2023-10-16 | 2023-12-22 | 通友微电(四川)有限公司 | Composite ceramic soft magnetic powder and preparation method thereof |
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