EP1564767A2 - Composite magnetic material and the method for manufacturing the same - Google Patents
Composite magnetic material and the method for manufacturing the same Download PDFInfo
- Publication number
- EP1564767A2 EP1564767A2 EP20040460058 EP04460058A EP1564767A2 EP 1564767 A2 EP1564767 A2 EP 1564767A2 EP 20040460058 EP20040460058 EP 20040460058 EP 04460058 A EP04460058 A EP 04460058A EP 1564767 A2 EP1564767 A2 EP 1564767A2
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- EP
- European Patent Office
- Prior art keywords
- magnetic powder
- fractions
- magnetic
- sieve
- powders
- Prior art date
- 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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- 238000000034 method Methods 0.000 title claims abstract description 17
- 239000002131 composite material Substances 0.000 title claims description 30
- 239000000696 magnetic material Substances 0.000 title claims description 18
- 238000004519 manufacturing process Methods 0.000 title claims description 13
- 239000006247 magnetic powder Substances 0.000 claims abstract description 42
- 239000000843 powder Substances 0.000 claims abstract description 17
- 239000000463 material Substances 0.000 claims abstract description 16
- 238000005029 sieve analysis Methods 0.000 claims abstract description 5
- 229920005992 thermoplastic resin Polymers 0.000 claims description 6
- 238000004458 analytical method Methods 0.000 claims description 3
- 238000004017 vitrification Methods 0.000 claims description 3
- 238000002844 melting Methods 0.000 claims description 2
- 230000008018 melting Effects 0.000 claims description 2
- 230000005291 magnetic effect Effects 0.000 description 8
- 239000000203 mixture Substances 0.000 description 8
- 239000002245 particle Substances 0.000 description 7
- 230000035699 permeability Effects 0.000 description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 230000005294 ferromagnetic effect Effects 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 241000557876 Centaurea cineraria Species 0.000 description 2
- 229910000976 Electrical steel Inorganic materials 0.000 description 2
- 229910001289 Manganese-zinc ferrite Inorganic materials 0.000 description 2
- JIYIUPFAJUGHNL-UHFFFAOYSA-N [O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[Mn++].[Mn++].[Mn++].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Zn++].[Zn++] Chemical compound [O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[Mn++].[Mn++].[Mn++].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Zn++].[Zn++] JIYIUPFAJUGHNL-UHFFFAOYSA-N 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 229920001971 elastomer Polymers 0.000 description 2
- 239000000806 elastomer Substances 0.000 description 2
- 125000000524 functional group Chemical group 0.000 description 2
- 229910002804 graphite Inorganic materials 0.000 description 2
- 239000010439 graphite Substances 0.000 description 2
- 230000007062 hydrolysis Effects 0.000 description 2
- 238000006460 hydrolysis reaction Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 239000012670 alkaline solution Substances 0.000 description 1
- 239000012876 carrier material Substances 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000004870 electrical engineering Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- XWHPIFXRKKHEKR-UHFFFAOYSA-N iron silicon Chemical compound [Si].[Fe] XWHPIFXRKKHEKR-UHFFFAOYSA-N 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 239000006249 magnetic particle Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000007779 soft material Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000012815 thermoplastic material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
Images
Classifications
-
- 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
-
- 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
- H01F41/0206—Manufacturing of magnetic cores by mechanical means
- H01F41/0246—Manufacturing of magnetic circuits by moulding or by pressing powder
Definitions
- This invention concerns the method for manufacturing composite magnetic material and composite magnetic material designed for use in electrical engineering.
- Magnetic composite material being electrically conductive elastic solid body of ferromagnetic properties, consists of ferromagnetic particles of magnetically soft materials, favourably chemically pure iron, silicon steel or manganese-zinc ferrite of grain size ranging from 0.1 mm to 0.25mm; particles of electrically conductive substance, favourably of graphite or silver dust of grain size ranging from 0.5 ⁇ m to 5 ⁇ m and of non-ferromagnetic, non-electrically conductive binder in the form of elastomer, favourably silicone, wherein virtual resistance of the material equals 9.2x10 -5 ⁇ m to 5.1 ⁇ 10 -3 ⁇ m and virtual Young's modulus equals from 5.6MPa to 5.8MPa.
- the method of manufacturing composite material consists in the ferromagnetic particles of soft magnetic substances, favourably chemically pure iron silicon steel or manganese-zinc ferrite and particles of electrically conductive substance favourably of graphite or silver dust undergoing intermixing. Then the obtained composition is mixed with a binder in the form of polymer elastomer of paste consistence and it undergoes polymerization in temperature ranging from 18°C to 22 °C.
- Magnetic particles of intermixed oxides whose group includes ferrites, of particle diameter ranging from 1 to 10nm, proper surface area equaling 120-350 m 2 /g, and with whose surface are the silans with functional groups are connected are already known from Polish patent description No. P 318099. These highly grinded particles can be fabricated through precipitation of mixed oxides from water alkaline solutions in the presence of hydrolysis capable silans, which have hydrolysis-resistant functional groups. These mixed oxides are suitable for being a carrier material attracting organic and biological substances.
- the composite magnetic materials were compressed magnetic powders, in which all the fractions of the magnetic powder are coated with insulating and binding dielectric.
- the essence of the method of manufacturing comprises fraction preparation through sieve analysis of at least two magnetic powder materials, one of which being coarse fraction of magnetic powder coated with insulating and binding dielectric, while the second one is fine fractions of non-insulated magnetic powder.
- Sieve analyses of at least two magnetic powder materials using the same sieve with coarse fractions of the magnetic powder are the powders which are left on the sieve and fine fractions of the magnetic powder are the screened powders, beneficially for sieve analysis of at least two magnetic powder materials the size of the sieve is selected.
- composite magnetic material is that between the grains of dielectric-coated magnetic powder material's coarse fractions which are coated with insulating and binding dielectric, the filling non-insulated powder fine fractions is placed.
- Powder composite material manufactured in this innovative method is characterized by improved magnetic properties in comparison to the composite, in which all the fractions were insulated. Moreover, the new magnetic powder composite material has increased magnetic permeability with maintained total energy loss.
- the used magnetic powder fractions can be of the same material, and can also be magnetic powders manufactured of different materials.
- Fig. 1 illustrates the schematic structure of composite magnetic material
- Fig. 2 presents maximum permeability characteristics as dependent on the insulated magnetic powder's coarse fractions percentage in the material.
- Magnetic material A composite manufactured in such a method is characterized by magnetic permeability ⁇ which equals about 350 and is higher in relation to the one of the material manufactured of magnetic powder and coated with insulating and binding dielectric.
- Method of manufacturing composite magnetic material proceeds as above; with the exception that selected coarse fraction percentage for composite B equals 35% wt. and the composite material B manufactured in such a method is characterized by magnetic permeability which equals about 330.
- Method of manufacturing composite magnetic material proceeds as in Example 1, with the exception that selected coarse fraction percentage for composite C equals 50% wt. and the composite material C manufactured in such a method is characterized by magnetic permeability ⁇ which equals about 320. Furthermore, fine fractions of magnetic powder 3 are the mixture of different powders.
- Method of manufacturing composite magnetic material proceeds as in Example 1 and 3, with the exception that selected coarse fraction percentage for composite D equals 60% wt. and the composite material D manufactured in such a method is characterized by magnetic permeability ⁇ which equals about 300.
- Method of manufacturing composite magnetic material proceeds as in Example 4, with the exception that coarse fraction percentage of magnetic powder 1 comprises a mixture of powders.
- Composite magnetic material being pressed magnetic powders is characterized by the grains of coarse fractions of magnetic powder A is manufactured as in Example 6, with the exception that coarse fraction percentage of magnetic powder 1 comprises a mixture of powders.
- Composite magnetic material manufactured as in example 5 the difference being fine fractions of magnetic powder 3 are the mixture of different powders.
- Composite magnetic material manufactured as in example 5 the difference being fine fractions of magnetic powder 1 are the mixture of different powders.
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Soft Magnetic Materials (AREA)
- Powder Metallurgy (AREA)
Abstract
The method is characterized by the fractions of at least two magnetic powder
materials being prepared through sieve analysis, one of these materials being coarse
fractions of magnetic powder (1) coated with insulating or binding dielectric (2), with
the other being other fine fractions of non-insulated magnetic powder (3), and the two
powders are mixed and cured.
Description
- This invention concerns the method for manufacturing composite magnetic material and composite magnetic material designed for use in electrical engineering.
- Composite magnetic material and the method for manufacturing the same is already known from Polish patent description No. 184856. Magnetic composite material, being electrically conductive elastic solid body of ferromagnetic properties, consists of ferromagnetic particles of magnetically soft materials, favourably chemically pure iron, silicon steel or manganese-zinc ferrite of grain size ranging from 0.1 mm to 0.25mm; particles of electrically conductive substance, favourably of graphite or silver dust of grain size ranging from 0.5µm to 5µm and of non-ferromagnetic, non-electrically conductive binder in the form of elastomer, favourably silicone, wherein virtual resistance of the material equals 9.2x10-5Ωm to 5.1×10-3 Ωm and virtual Young's modulus equals from 5.6MPa to 5.8MPa. The method of manufacturing composite material consists in the ferromagnetic particles of soft magnetic substances, favourably chemically pure iron silicon steel or manganese-zinc ferrite and particles of electrically conductive substance favourably of graphite or silver dust undergoing intermixing. Then the obtained composition is mixed with a binder in the form of polymer elastomer of paste consistence and it undergoes polymerization in temperature ranging from 18°C to 22 °C.
- Method for manufacturing metal powder products, according to which iron-based powder compositions of particles are intermixed with thermoplastic material and lubricant,
is known from Polish pattern description No. 179450. The obtained mixture is compacted in temperature under vitrification temperature or thermoplastic resin melting temperature, the compacted product is then heated in order to cure the thermoplastic resin. Subsequently, the compacted ingredient may be thermally treated to the temperature above the temperature of thermoplastic resin curing. - Magnetic particles of intermixed oxides whose group includes ferrites, of particle diameter ranging from 1 to 10nm, proper surface area equaling 120-350 m2/g, and with whose surface are the silans with functional groups are connected are already known from Polish patent description No. P 318099. These highly grinded particles can be fabricated through precipitation of mixed oxides from water alkaline solutions in the presence of hydrolysis capable silans, which have hydrolysis-resistant functional groups. These mixed oxides are suitable for being a carrier material attracting organic and biological substances.
- Known from use are the composite magnetic materials were compressed magnetic powders, in which all the fractions of the magnetic powder are coated with insulating and binding dielectric.
- According to this invention, the essence of the method of manufacturing comprises fraction preparation through sieve analysis of at least two magnetic powder materials, one of which being coarse fraction of magnetic powder coated with insulating and binding dielectric, while the second one is fine fractions of non-insulated magnetic powder.
- Sieve analyses of at least two magnetic powder materials using the same sieve, with coarse fractions of the magnetic powder are the powders which are left on the sieve and fine fractions of the magnetic powder are the screened powders, beneficially for sieve analysis of at least two magnetic powder materials the size of the sieve is selected.
- The essence of composite magnetic material, according to the invention, is that between the grains of dielectric-coated magnetic powder material's coarse fractions which are coated with insulating and binding dielectric, the filling non-insulated powder fine fractions is placed.
- Powder composite material manufactured in this innovative method is characterized by improved magnetic properties in comparison to the composite, in which all the fractions were insulated. Moreover, the new magnetic powder composite material has increased magnetic permeability with maintained total energy loss. The used magnetic powder fractions can be of the same material, and can also be magnetic powders manufactured of different materials.
- The object of the invention in the form of method for its manufacture is visible on the drawing, on which Fig. 1 illustrates the schematic structure of composite magnetic material, and Fig. 2 presents maximum permeability characteristics as dependent on the insulated magnetic powder's coarse fractions percentage in the material.
- Method for manufacturing composite magnetic material, wherein the fractions of two magnetic powder materials- 1 and 2 - are prepared through
sieve analysis 3. Selected percentage of coarse fractions for composite A equals 25 % wt., with coarse fractions ofmagnetic powder 1 coated with insulating andbinding dielectric 2 being the ones which remain on the sieve of selected size. In case of the second material fine fractions ofmagnetic powder 3 are the powder screened through the same sieve. Subsequently, powders prepared this method are being mixed and compressed in the temperature below the vitrification temperature, and the compressed product is heated in order to cure the thermoplastic resin. Magnetic material A composite manufactured in such a method is characterized by magnetic permeability µ which equals about 350 and is higher in relation to the one of the material manufactured of magnetic powder and coated with insulating and binding dielectric. - Method of manufacturing composite magnetic material proceeds as above; with the exception that selected coarse fraction percentage for composite B equals 35% wt. and the composite material B manufactured in such a method is characterized by magnetic permeability which equals about 330.
- Method of manufacturing composite magnetic material proceeds as in Example 1, with the exception that selected coarse fraction percentage for composite C equals 50% wt. and the composite material C manufactured in such a method is characterized by magnetic permeability µ which equals about 320. Furthermore, fine fractions of
magnetic powder 3 are the mixture of different powders. - Method of manufacturing composite magnetic material proceeds as in Example 1 and 3, with the exception that selected coarse fraction percentage for composite D equals 60% wt. and the composite material D manufactured in such a method is characterized by magnetic permeability µ which equals about 300.
- Method of manufacturing composite magnetic material proceeds as in Example 4, with the exception that coarse fraction percentage of
magnetic powder 1 comprises a mixture of powders. - Composite magnetic material being pressed magnetic powders is characterized by the grains of coarse fractions of magnetic powder A is manufactured as in Example 6, with the exception that coarse fraction percentage of
magnetic powder 1 comprises a mixture of powders. - Composite magnetic material manufactured as in example 5, the difference being fine fractions of
magnetic powder 3 are the mixture of different powders. - Composite magnetic material manufactured as in example 5, the difference being fine fractions of
magnetic powder 1 are the mixture of different powders.
Claims (5)
- Method for manufacturing composite magnetic material, wherein magnetic powders are compacted in temperature below the vitrification or melting temperature of the thermoplastic resin, and the compacted product is heated in order to harden the thermoplastic resin wherein through sieve analysis the fractions of at least two magnetic powder materials are being prepared, one of which are coarse fractions of magnetic powder (1) coated with insulating or binding dielectric (2) and the other fine fractions of magnetic powder (3), and the two powder are being mixed and compacted.
- Method as claimed in Claim 1, wherein the fractions of at least two magnetic powder materials (1, 3), one of which being coarse fractions of magnetic powder (1) coated with insulating or binding dielectric (2) and the other fine fractions of non-insulated magnetic powder (3).
- Method as claimed in Claim 1, wherein sieve analyses of at least two magnetic powder materials is conducted using the same sieve, with coarse fractions of the magnetic powder (1) being the powders which are left on the sieve and fine fractions of the magnetic powder (2) being the screened powders.
- Method as claimed in Claim 1, wherein for sieve analyses of at least two magnetic powder materials (1, 2) the size of the sieve is selected.
- Composite magnetic material being compacted magnetic powders, wherein between coarse fraction grains of magnetic powder (1) coated with insulating or binding dielectric (2) the filling of other fine fractions of non-insulated magnetic powder (3) is present.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PL36468504 | 2004-02-02 | ||
| PL364685A PL204145B1 (en) | 2004-02-02 | 2004-02-02 | Method for manufacture of magnetic composite material and magnetic composite material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP1564767A2 true EP1564767A2 (en) | 2005-08-17 |
Family
ID=34699211
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP20040460058 Withdrawn EP1564767A2 (en) | 2004-02-02 | 2004-12-23 | Composite magnetic material and the method for manufacturing the same |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP1564767A2 (en) |
| PL (1) | PL204145B1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2131373A1 (en) | 2008-06-05 | 2009-12-09 | TRIDELTA Weichferrite GmbH | Soft magnetic material and method for producing objects from this soft magnetic material |
| DE102008026888A1 (en) | 2008-06-05 | 2009-12-10 | Tridelta Weichferrite Gmbh | Soft magnetic material i.e. manganese zinc ferrite for e.g. transformer, has nano-fraction of soft magnetic material particles with particle size in range of ten to two hundred nano meter, where material is produced by spray drying |
| DE102008026887A1 (en) | 2008-06-05 | 2009-12-10 | Tridelta Weichferrite Gmbh | Soft magnetic material i.e. manganese zinc ferrite for e.g. transformer, has nano-fraction of soft magnetic material particles with particle size in range of ten to two hundred nano meter, where material is produced by spray drying |
| DE102008048839A1 (en) | 2008-09-25 | 2010-04-01 | Tridelta Weichferrite Gmbh | Soft magnetic material i.e. manganese zinc ferrite for e.g. transformer, has nano-fraction of soft magnetic material particles with particle size in range of ten to two hundred nano meter, where material is produced by spray drying |
-
2004
- 2004-02-02 PL PL364685A patent/PL204145B1/en not_active IP Right Cessation
- 2004-12-23 EP EP20040460058 patent/EP1564767A2/en not_active Withdrawn
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2131373A1 (en) | 2008-06-05 | 2009-12-09 | TRIDELTA Weichferrite GmbH | Soft magnetic material and method for producing objects from this soft magnetic material |
| DE102008026888A1 (en) | 2008-06-05 | 2009-12-10 | Tridelta Weichferrite Gmbh | Soft magnetic material i.e. manganese zinc ferrite for e.g. transformer, has nano-fraction of soft magnetic material particles with particle size in range of ten to two hundred nano meter, where material is produced by spray drying |
| DE102008026887A1 (en) | 2008-06-05 | 2009-12-10 | Tridelta Weichferrite Gmbh | Soft magnetic material i.e. manganese zinc ferrite for e.g. transformer, has nano-fraction of soft magnetic material particles with particle size in range of ten to two hundred nano meter, where material is produced by spray drying |
| US8070974B2 (en) | 2008-06-05 | 2011-12-06 | Tridelta Weichferrite Gmbh | Soft-magnetic material and process for producing articles composed of this soft-magnetic material |
| DE102008048839A1 (en) | 2008-09-25 | 2010-04-01 | Tridelta Weichferrite Gmbh | Soft magnetic material i.e. manganese zinc ferrite for e.g. transformer, has nano-fraction of soft magnetic material particles with particle size in range of ten to two hundred nano meter, where material is produced by spray drying |
Also Published As
| Publication number | Publication date |
|---|---|
| PL364685A1 (en) | 2005-08-08 |
| PL204145B1 (en) | 2009-12-31 |
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