CN115206622A - Soft magnetic alloy powder and preparation method thereof - Google Patents

Soft magnetic alloy powder and preparation method thereof Download PDF

Info

Publication number
CN115206622A
CN115206622A CN202210624113.3A CN202210624113A CN115206622A CN 115206622 A CN115206622 A CN 115206622A CN 202210624113 A CN202210624113 A CN 202210624113A CN 115206622 A CN115206622 A CN 115206622A
Authority
CN
China
Prior art keywords
soft magnetic
powder
phosphate
alloy powder
insulating layer
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.)
Pending
Application number
CN202210624113.3A
Other languages
Chinese (zh)
Inventor
刘开煌
杨雪薇
高鹏
虞成城
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shenzhen Sunway Communication Co Ltd
Original Assignee
Shenzhen Sunway Communication Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Shenzhen Sunway Communication Co Ltd filed Critical Shenzhen Sunway Communication Co Ltd
Priority to CN202210624113.3A priority Critical patent/CN115206622A/en
Publication of CN115206622A publication Critical patent/CN115206622A/en
Pending legal-status Critical Current

Links

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
    • 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
    • H01F1/24—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 the particles being insulated
    • 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

Landscapes

  • 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 invention discloses soft magnetic alloy powder and a preparation method thereof, belonging to the technical field of inductance powder. By sequentially forming a double-layer insulation structure of a metal salt layer and a phosphate glass layer on the surface of the soft magnetic powder, the insulation resistance characteristic and the aging resistance characteristic of the soft magnetic powder can be effectively improved, and the inductor with high reliability is formed.

Description

Soft magnetic alloy powder and preparation method thereof
Technical Field
The invention relates to the technical field of inductance powder, in particular to soft magnetic alloy powder and a preparation method thereof.
Background
The power type inductor has been developed in a small size, a thin shape, a high frequency, a low DCR (direct current resistance), a large current, and a low EMI (electromagnetic interference). The soft magnetic alloy material has the characteristics of high saturation magnetic flux density, high magnetic permeability, excellent current superposition and the like, is applied to the preparation of a power inductor, and plays a key role in the energy conversion from a power supply to a device. If insulation treatment is required between the soft magnetic alloy powders, if insulation treatment is not performed, eddy current loss between particles is too large, which causes large loss of the magnetic powder core.
Phosphoric acid and phosphate are commonly used for passivation coating of the magnetic powder core, for example, the Chinese patent with publication number CN112530655A discloses that oxides and phosphoric acid solution are sprayed on the surface of metal particle powder to reduce the power consumption of soft magnetic alloy material, but such coating method is difficult to play a role of insulation coating when the phosphoric acid coating amount is low, and when the coating amount is high, the magnetic conductivity is seriously reduced, the high temperature aging resistance of the phosphoric acid layer is poor, and the insulation failure after aging treatment is obvious.
Accordingly, there is a need for a novel soft magnetic alloy powder to overcome the above problems.
Disclosure of Invention
In order to overcome the defects of the prior art, the technical problems to be solved by the invention are as follows: how to provide soft magnetic alloy powder with high insulation and high aging resistance and a preparation method thereof.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows: soft magnetic metal powder particles, a first insulating layer and a second insulating layer, respectively;
the first insulating layer is a metal salt layer formed by iron and iron oxide; the second insulating layer is a phosphate glass layer.
Wherein the soft magnetic metal powder particles are any one of carbonyl iron powder, reduced iron powder, iron-silicon-chromium powder, iron-silicon powder, iron-based amorphous alloy powder and iron-based nanocrystalline alloy powder.
Wherein the mass of the first insulating layer accounts for 0.1-0.3% of the mass of the soft magnetic alloy powder, and the mass of the second insulating layer accounts for 0.4-1.2% of the mass of the soft magnetic alloy powder.
The other technical scheme adopted by the invention is as follows: a preparation method of soft magnetic alloy powder comprises the following steps:
s1, preparing a solution from metal salt and a solvent, adding soft magnetic metal powder particles, and stirring to form a first insulating layer;
s2, adding metal phosphate and metal oxide into the product obtained in the S1, and coating to form a second insulating layer;
and S3, annealing the product obtained in the S2 to obtain the magnetically soft alloy powder.
The metal salt is any one of phosphate, zirconate and basic nitrate, the phosphate is any one of zinc-based phosphate, manganese-based phosphate and copper-based phosphate, and the zirconate is fluorozirconate.
Wherein, when the metal salt is phosphate or zirconate, the temperature is 30-60 ℃ during stirring;
when the metal salt is alkaline nitrate, the temperature is 100-150 ℃ during stirring.
The metal phosphate is at least one of aluminum dihydrogen phosphate, aluminum phosphate and magnesium dihydrogen phosphate, and the metal oxide is at least one of aluminum oxide, magnesium oxide, zinc oxide, barium oxide, ferroferric oxide, kaolin containing the metal oxide, micaceous stone and talcum powder.
Wherein the solvent comprises deionized water and an organic solvent, and the mass of the solvent is 15-30% of the mass of the soft magnetic metal powder particles.
Wherein the particle size of the metal phosphate is as follows: d50= 0.1-5 um, and the particle size of the metal oxide is as follows: d50= 0.01-0.1 um.
Wherein the operating parameters of the annealing treatment are 300-400 ℃ and 1-5 h.
The invention has the beneficial effects that: by sequentially forming a double-layer insulation structure of a metal salt layer and a phosphate glass layer on the surface of the soft magnetic powder, the insulation resistance characteristic and the aging resistance characteristic of the soft magnetic powder can be effectively improved, and the inductor with high reliability is formed.
Drawings
FIG. 1 is a schematic cross-sectional view of a soft magnetic alloy powder coated in accordance with an embodiment of the present invention;
FIG. 2 is a diagram illustrating a coating apparatus for coating a second insulating layer according to an embodiment of the present invention;
description of reference numerals: 1. soft magnetic metal powder particles; 2. a metal salt layer; 3. a phosphate glass layer.
Detailed Description
In order to explain technical contents, achieved objects, and effects of the present invention in detail, the following description is made with reference to the accompanying drawings in combination with the embodiments.
The most key concept of the invention is as follows: the double-layer insulation structure of the metal salt layer and the phosphate glass layer is formed on the surface of the soft magnetic powder in sequence, so that the insulation resistance characteristic and the ageing resistance characteristic of the soft magnetic powder can be effectively improved, and the inductor with high reliability is formed.
Referring to fig. 1 and 2, a soft magnetic alloy powder according to the present invention includes, from inside to outside, soft magnetic metal powder particles 1, a first insulating layer, and a second insulating layer;
the first insulating layer is a metal salt layer 2 consisting of iron and iron oxide; the second insulating layer is a phosphate glass layer 3.
As can be seen from the above description, the beneficial effects of the present invention are: by sequentially forming the double-layer insulation structure of the metal salt layer 2 and the phosphate glass layer 3 on the surface of the soft magnetic powder, the insulation resistance characteristic and the aging resistance characteristic of the soft magnetic powder can be effectively improved, and the inductor with high reliability is formed.
The soft magnetic metal powder particles 1 are any one of carbonyl iron powder, reduced iron powder, iron-silicon-chromium powder, iron-silicon powder, iron-based amorphous alloy powder, and iron-based nanocrystalline alloy powder.
Preferably, the soft magnetic metal powder particles 1 are reduced iron powder and iron-silicon-chromium powder.
Further, the soft magnetic powder has a particle size in the range of 5-60um, wherein preferably 5-30um, more preferably 5-10um. As can be seen from the above description, the too large particle size of the soft magnetic powder is not favorable for coating the insulating layer, and the smaller particle size is inferior in fluidity.
Furthermore, the mass of the first insulating layer accounts for 0.1-0.3% of the mass of the soft magnetic alloy powder, and the mass of the second insulating layer accounts for 0.4-1.2% of the mass of the soft magnetic alloy powder.
Preferably, the mass of the first insulating layer accounts for 0.1-0.2% of the mass of the soft magnetic alloy powder, and the mass of the second insulating layer accounts for 0.6-1.0% of the mass of the soft magnetic alloy powder.
As is apparent from the above description, the mass of the second insulating layer is larger than that of the first insulating layer, and the decrease in magnetic permeability is reduced while ensuring the soft magnetic alloy powder to be insulated and coated.
The other technical scheme adopted by the invention is as follows: a preparation method of soft magnetic alloy powder comprises the following steps:
s1, preparing a solution from metal salt and a solvent, adding soft magnetic metal powder particles 1, and stirring to form a first insulating layer;
s2, adding metal phosphate and metal oxide into the product obtained in the S1, and coating to form a second insulating layer;
and S3, annealing the product obtained in the S2 to obtain the magnetically soft alloy powder.
As is apparent from the above description, forming the first insulating layer and the second insulating layer in this order on the soft magnetic metal powder yields a soft magnetic alloy powder having high insulation properties and high aging resistance.
Further, the metal salt is any one of phosphate, zirconate and basic nitrate, the phosphate is any one of zinc-based, manganese-based and copper-based phosphate, and the zirconate is fluorozirconate.
Further, the basic nitrate salt is composed of sodium hydroxide and sodium nitrate. The mass ratio of the sodium hydroxide to the sodium nitrate is (1-4) to 1.
As is apparent from the above description, the metal salt forms an insulating eutectic with the metal on the surface of the soft magnetic metal powder particle 1, and the soft magnetic alloy powder has a high resistance to reduce eddy currents in the material, thereby making the material have such a reason and saturation magnetic flux density.
Further, when the metal salt is phosphate or zirconate, the temperature during stirring is 30-60 ℃; when the metal salt is alkaline nitrate, the temperature is 100-150 ℃ during stirring.
Preferably, when the metal salt is phosphate or zirconate, the temperature during stirring is 35 to 50 ℃; when the metal salt is alkaline nitrate, the temperature during stirring is 120-130 ℃.
As can be seen from the above description, different temperatures are used for stirring due to different reaction conditions of the metal salt.
Further, the first insulating layer is formed by preparing a solution of phosphate, zirconate, or alkali nitrate and a solvent, and then reacting the solution by ultrasonic oscillation, mechanical stirring, rotary centrifugation, or the like.
As is clear from the above description, the metal salt is uniformly mixed in the solvent and is physically and uniformly coated on the soft magnetic metal powder particles 1.
Further, the metal phosphate is at least one of aluminum dihydrogen phosphate, aluminum phosphate and magnesium dihydrogen phosphate, and the metal oxide is at least one of aluminum oxide, magnesium oxide, zinc oxide, barium oxide, ferroferric oxide, kaolin, micaceous stone and talcum powder containing the metal oxide.
Preferably, the metal phosphate is aluminum dihydrogen phosphate or aluminum phosphate, and the metal oxide is at least one of alumina, magnesia, barium oxide, ferroferric oxide, and mica containing the metal oxide.
Phosphate glass layer 3 may be characterized as P 2 O 5 With other metal oxides, non-metal oxides, wherein P 2 O 5 The phosphate glass layer 3 accounts for 40 to 60 percent of the mass fraction for forming the main body frame and the high-temperature resistant bonding effect of the phosphate glass layer 3; al (Al) 2 O 3 The waterproof performance of the soft magnetic powder can be improved, the network structure strength of the phosphate glass layer 3 can be improved, and the soft magnetic powder accounts for 10-20% of the phosphate glass layer 3 in percentage by mass; the MgO plays a role in accelerating the reaction speed and improving the strength of the phosphate glass layer 3, and accounts for 5-10% of the mass fraction of the phosphate glass layer 3; fe 3 O 4 The transition effect of the double-layer insulating layer is achieved, the magnetic performance of the coated powder is improved, and the phosphate glass layer 3 accounts for 0-10% of the mass fraction; the silica can improve the network structure of the glass layer and improve the water resistance, but can not provide the reactivity, and accounts for 5 to 10 percent of the mass fraction of the phosphate glass layer 3.
Further, the second insulating layer may be formed by a mechanical coating method, such as the coating method shown in fig. 2, or a ball milling coating method.
Further, the solvent includes deionized water and an organic solvent (the organic solvent is miscible with deionized water), and the mass of the solvent is 15 to 30% of the mass of the soft magnetic metal powder particles 1.
As can be seen from the above description, the solvent has too much mass, the metal salt has too much fluidity and is not easy to adsorb; the solution quality is too low and the first insulating layer is too thick, affecting the permeability of the soft magnetic powder.
Further, the particle size of the metal phosphate is: d50=0.1 to 5um, preferably 0.1 to 1um; the particle size of the metal oxide is: d50= 0.01-0.1 um, preferably 0.02-0.05 um.
As can be seen from the above description, the metal phosphate and the metal oxide have too large or too small a particle size to facilitate adsorption and encapsulation.
Furthermore, the temperature of the annealing treatment is 300-400 ℃, and the time is 1-5 h.
As is apparent from the above description, after the second insulating layer is formed, the soft magnetic powder may be annealed by a thermal reaction furnace apparatus, and the compactness and the bonding force of the insulating layer on the surface of the soft magnetic powder may be further improved.
Referring to fig. 1 and fig. 2, an embodiment 1 of the present invention is:
soft magnetic alloy powder comprises soft magnetic metal powder particles 1, a first insulating layer and a second insulating layer from inside to outside; the first insulating layer is a metal salt layer 2 consisting of iron and iron oxide; the second insulating layer is a phosphate glass layer 3. The mass of the first insulating layer accounted for 0.1% of the mass of the soft magnetic alloy powder, and the mass of the second insulating layer accounted for 0.4% of the mass of the soft magnetic alloy powder.
The soft magnetic metal powder particles 1 are reduced iron powder having a particle diameter of: d50=5um;
the preparation method of the soft magnetic alloy powder comprises the following steps:
s1, preparing a zinc phosphate and a solvent (deionized water and an organic solvent) into a solution, wherein the mass of the solvent is 20% of that of the soft magnetic metal powder particles 1, adding the soft magnetic metal powder particles 1, stirring by ultrasonic oscillation at the temperature of 45 ℃ to form a first insulating layer;
s2, adding the product obtained in the S1 with the particle size: d50=0.5um aluminum dihydrogen phosphate, particle size: d50=0.03um of aluminum oxide and magnesium oxide, and a second insulating layer is formed by coating with a mechanical device shown in fig. 2;
and S3, annealing the product obtained in the S2 at 350 ℃ for 4h to obtain the magnetically soft alloy powder.
Example 2 of the present invention is:
soft magnetic alloy powder comprises soft magnetic metal powder particles 1, a first insulating layer and a second insulating layer from inside to outside; the first insulating layer is a metal salt layer 2 consisting of iron and iron oxide; the second insulating layer is a phosphate glass layer 3. The mass of the first insulating layer accounted for 0.1% of the mass of the soft magnetic alloy powder, and the mass of the second insulating layer accounted for 0.8% of the mass of the soft magnetic alloy powder.
The soft magnetic metal powder particles 1 are reduced iron powder having a particle diameter of: d50=5um;
the preparation method of the soft magnetic alloy powder comprises the following steps:
s1, preparing fluorozirconate and a solvent (deionized water and an organic solvent) into a solution, wherein the mass of the solvent is 15% of that of the soft magnetic metal powder particles 1, adding the soft magnetic metal powder particles 1, stirring by ultrasonic oscillation at the temperature of 30 ℃ to form a first insulating layer;
s2, adding the product obtained in the S1 with the particle size: d50=0.1um aluminum dihydrogen phosphate, kaolin, and particle size: d50=0.01um magnesium oxide, coated with a mechanical device as shown in fig. 2 to form a second insulating layer;
and S3, annealing the product obtained in the S2 at 300 ℃ for 5 hours to obtain the magnetically soft alloy powder.
Example 3 of the present invention is:
soft magnetic alloy powder comprises soft magnetic metal powder particles 1, a first insulating layer and a second insulating layer from inside to outside; the first insulating layer is a metal salt layer 2 consisting of iron and iron oxide; the second insulating layer is a phosphate glass layer 3. The mass of the first insulating layer accounts for 0.2% of the mass of the soft magnetic alloy powder, and the mass of the second insulating layer accounts for 0.8% of the mass of the soft magnetic alloy powder.
The soft magnetic metal powder particles 1 are reduced iron powder having a particle diameter of: d50=5um;
the preparation method of the soft magnetic alloy powder comprises the following steps:
s1, preparing manganese phosphate and a solvent (deionized water and an organic solvent) into a solution, wherein the mass of the solvent is 30% of that of the soft magnetic metal powder particles 1, adding the soft magnetic metal powder particles 1, stirring by ultrasonic oscillation at the temperature of 60 ℃ to form a first insulating layer;
s2, in the product obtained in S1: aluminum phosphate with D50=5um, particle size: aluminum oxide, zinc oxide and barium oxide with the D50=0.1um are coated by mechanical equipment shown in figure 2 to form a second insulating layer;
and S3, annealing the product obtained in the step S2 at 400 ℃ for 1h to obtain the magnetically soft alloy powder.
Example 4 of the present invention differs from example 1 in that: the particle diameter of the soft magnetic metal powder particle 1 is: iron silicon chromium powder with D50=10 um; the mass of the first insulating layer accounts for 0.2 percent of the mass of the soft magnetic alloy powder, and the mass of the second insulating layer accounts for 0.8 percent of the mass of the soft magnetic alloy powder; the metal salt is an alkaline nitrate, the mass ratio of sodium hydroxide to sodium nitrate is 2.
Example 5 of the present invention differs from example 4 in that: the metal salt is copper phosphate, the metal phosphate is aluminum dihydrogen phosphate, and the metal oxide is aluminum oxide and magnesium oxide.
Example 6 of the present invention differs from example 1 in that: the mass of the first insulating layer accounts for 0.3 percent of the mass of the soft magnetic alloy powder, and the mass of the second insulating layer accounts for 1.2 percent of the mass of the soft magnetic alloy powder; the metal phosphate is magnesium dihydrogen phosphate, and the metal oxide is ferroferric oxide and talcum powder.
Comparative example 1 of the present invention differs from example 1 in that: the mass of the first insulating layer thereof accounts for 0.5% of the mass of the soft magnetic alloy powder, and the second insulating layer is not included.
Comparative example 2 of the present invention differs from example 1 in that: which does not include the first insulating layer and the second insulating layer.
Comparative example 3 of the present invention is different from example 4 in that it does not include the first insulating layer and the second insulating layer.
Comparative example 4 of the present invention is different from example five in that it does not include the first insulating layer.
The specific structures of the soft magnetic alloy powders of examples 1 to 5 and comparative examples 1 to 4 are shown in table 1:
TABLE 1
Figure BDA0003675985850000071
Figure BDA0003675985850000081
Magnetic rings were prepared from the soft magnetic alloy powders of examples 1 to 5 and comparative examples 1 to 4, respectively, and magnetic properties and insulation resistance data of the magnetic rings were measured, and the test data are shown in table 2.
The preparation method of the magnetic ring comprises the following steps: adding 3% epoxy resin curing agent system into soft magnetic alloy powder, adding diluent, granulating to obtain 100-200 mesh powder, pressing 5g of magnetic powder into magnetic ring with diameter of 25 mm and 20mm at 200 deg.C and 600Mpa, and winding 26 turns of coil with 0.1mm wire diameter.
The test was laid down as follows: and testing the inductance value of the magnetic ring by using an LCR meter and calculating the magnetic conductivity, testing the insulation resistance of the magnetic ring under the conditions of DC =100V and t =3s by using a point contact type withstand voltage instrument, aging the magnetic ring for 24h under the condition of 180 ℃, and testing the insulation resistance of the magnetic ring under the conditions of DC =100V and t =3s by using the point contact type withstand voltage instrument again.
TABLE 2
Figure BDA0003675985850000082
As can be seen from the data measured in table 2, after the soft magnetic metal powder with different compositions is coated by the metal salt layer 2 and the phosphate glass layer 3, the magnetic powder with high insulation and aging resistance can be obtained, and the magnetic permeability is not significantly reduced.
The above description is only an embodiment of the present invention, and is not intended to limit the scope of the present invention, and all equivalent modifications made by the present invention and the contents of the accompanying drawings, which are directly or indirectly applied to the related technical fields, are included in the scope of the present invention.

Claims (10)

1. A soft magnetic alloy powder is characterized in that the soft magnetic alloy powder comprises soft magnetic metal powder particles, a first insulating layer and a second insulating layer from inside to outside;
the first insulating layer is a metal salt layer formed by iron and iron oxide; the second insulating layer is a phosphate glass layer.
2. A soft magnetic alloy powder according to claim 1, wherein the soft magnetic metal powder particles are any one of carbonyl iron powder, reduced iron powder, iron-silicon-chromium powder, iron-silicon powder, iron-based amorphous alloy powder, and iron-based nanocrystalline alloy powder.
3. A soft magnetic alloy powder according to claim 1, wherein the mass of the first insulating layer is 0.1% to 0.3% of the mass of the soft magnetic alloy powder, and the mass of the second insulating layer is 0.4% to 1.2% of the mass of the soft magnetic alloy powder.
4. The preparation method of the soft magnetic alloy powder is characterized by comprising the following steps of:
s1, preparing a solution from metal salt and a solvent, adding soft magnetic metal powder particles, and stirring to form a first insulating layer;
s2, adding metal phosphate and metal oxide into the product obtained in the S1, and coating to form a second insulating layer;
and S3, annealing the product obtained in the S2 to obtain the magnetically soft alloy powder.
5. The method of producing a powder of a soft magnetic alloy according to claim 4, wherein the metal salt is any one of a phosphate, a zirconate, and an alkali nitrate, the phosphate is any one of a zinc-based phosphate, a manganese-based phosphate, and a copper-based phosphate, and the zirconate is a fluorozirconate.
6. The method for preparing a powder of a soft magnetic alloy according to claim 5, wherein when the metal salt is a phosphate or a zirconate, the temperature during stirring is 30 to 60 ℃;
when the metal salt is alkaline nitrate, the temperature is 100-150 ℃ during stirring.
7. The method for preparing a magnetically soft alloy powder according to claim 4, wherein the metal phosphate is at least one of aluminum dihydrogen phosphate, aluminum phosphate, and magnesium dihydrogen phosphate, and the metal oxide is at least one of aluminum oxide, magnesium oxide, zinc oxide, barium oxide, triiron tetroxide, and kaolin, micanite, and talc containing the metal oxide.
8. The method for preparing a soft magnetic alloy powder according to claim 4, wherein the solvent comprises deionized water and an organic solvent, and the mass of the solvent is 15 to 30% of the mass of the soft magnetic metal powder particles.
9. The method for preparing a magnetically soft alloy powder according to claim 4, wherein the metal phosphate has a particle size of: d50= 0.1-5 um, and the particle size of the metal oxide is as follows: d50= 0.01-0.1 um.
10. The method for preparing a magnetically soft alloy powder according to claim 4, wherein the annealing is carried out at a temperature of 300 to 400 ℃ for 1 to 5 hours.
CN202210624113.3A 2022-06-02 2022-06-02 Soft magnetic alloy powder and preparation method thereof Pending CN115206622A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210624113.3A CN115206622A (en) 2022-06-02 2022-06-02 Soft magnetic alloy powder and preparation method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210624113.3A CN115206622A (en) 2022-06-02 2022-06-02 Soft magnetic alloy powder and preparation method thereof

Publications (1)

Publication Number Publication Date
CN115206622A true CN115206622A (en) 2022-10-18

Family

ID=83575398

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202210624113.3A Pending CN115206622A (en) 2022-06-02 2022-06-02 Soft magnetic alloy powder and preparation method thereof

Country Status (1)

Country Link
CN (1) CN115206622A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116631764A (en) * 2023-07-24 2023-08-22 通友微电(四川)有限公司 Method for preparing inorganic coated soft magnetic powder

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116631764A (en) * 2023-07-24 2023-08-22 通友微电(四川)有限公司 Method for preparing inorganic coated soft magnetic powder
CN116631764B (en) * 2023-07-24 2023-10-27 通友微电(四川)有限公司 Method for preparing inorganic coated soft magnetic powder

Similar Documents

Publication Publication Date Title
CN108269670B (en) Insulation and packaging treatment method for Fe-Si-Al soft magnetic alloy powder
CN102623121B (en) Method for manufacturing iron-silicon material and Mu-90 iron-silicon magnetic powder core
JP3624681B2 (en) Composite magnetic material and method for producing the same
CN104217835A (en) Method for manufacturing sendust core with effective magnetic permeability of 125 Henrys per meter
CN112509777B (en) Soft magnetic alloy material and preparation method and application thereof
CN109754972A (en) A kind of high-frequency molding inductance soft magnetism powder and preparation method thereof
CN112768166A (en) Magnetic core material and preparation method and application thereof
CN104505209A (en) Metal soft magnetic composite powder cores and preparation method thereof
CN109216006A (en) soft magnetic alloy powder core and preparation method thereof
CN107352991A (en) A kind of core shell structure MnZn/nickel zinc complex ferrite and preparation method thereof
CN111128537A (en) Preparation method of soft magnetic composite material based on fluorozirconic acid hydrolysis
CN104028747A (en) Inhomogeneous nucleation insulation coating processing method of metal soft magnetic composite material
CN115206622A (en) Soft magnetic alloy powder and preparation method thereof
CN103745791A (en) Production method of ultrahigh magnetic permeability of iron-based nanocrystalline magnetic powder core
CN104028762A (en) Preparation method of soft magnetic composite material
KR20020071285A (en) Composite metal powder for power factor correction having good dc biased characteristics and method of processing soft magnetic core by thereof using
CN107119174B (en) Annealing method for improving DC bias performance of Fe-Si-Al soft magnetic powder core
WO2022241736A1 (en) Magnetic powder for manufacturing magnet, and magnet and magnetic element
CN102303115A (en) Manufacturing method of ferrum silicon material and mu26 ferrum silicon magnetic powder core
CN111081466A (en) Amorphous nanocrystalline soft magnetic composite material and preparation method and application thereof
CN116053018A (en) Preparation method of low-loss high-DC superposition characteristic magnetic powder core
CN108899152A (en) A kind of more insulating layer iron silicon substrate soft magnetic-powder cores and preparation method thereof
CN113658769A (en) High-frequency high-Q-value FeSiAl @ MnZn ferrite soft magnetic composite magnetic powder core and preparation method thereof
CN112562956A (en) Ferrite-coated FeSiAl metal magnetic powder core and preparation method thereof
CN115475935B (en) Preparation method of iron-based soft magnetic composite powder and iron-based soft magnetic composite powder

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination