CN112309663A - Permanent magnetic ferrite magnetic ring magnetic powder and preparation method thereof - Google Patents
Permanent magnetic ferrite magnetic ring magnetic powder and preparation method thereof Download PDFInfo
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- CN112309663A CN112309663A CN201910696708.8A CN201910696708A CN112309663A CN 112309663 A CN112309663 A CN 112309663A CN 201910696708 A CN201910696708 A CN 201910696708A CN 112309663 A CN112309663 A CN 112309663A
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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
- H01F1/032—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
- H01F1/09—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 mixtures of metallic and non-metallic particles; metallic particles having oxide skin
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- 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
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- 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
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Abstract
A permanent magnetic ferrite magnetic ring magnetic powder and a preparation method thereof relate to the technical field of magnetic materials; the composition comprises the following raw materials: anisotropic neodymium iron boron magnetic powder, anisotropic samarium cobalt magnetic powder, anisotropic strontium ferrite magnetic powder, iron oxide, bismuth oxide, nickel oxide, titanium oxide, silicon dioxide, niobium oxide, tantalum oxide, graphene, epoxy resin, manganese oxide, cobalt oxide, calcium carbonate, a dispersing agent, an adhesive, and a wetting agent; the preparation can be finished by taking the raw materials according to the metering ratio and processing according to a permanent magnetic ferrite magnetic ring magnetic powder and a preparation method thereof. The invention has the beneficial effects that: saving rare earth, reducing cost and high cost performance. The addition of other anisotropic magnetic powder with low price in the anisotropic neodymium iron boron not only keeps the higher magnetic performance of the magnet, but also reduces the cost of raw materials and has high cost performance.
Description
Technical Field
The invention relates to the technical field of magnetic materials, in particular to a preparation method of permanent magnetic ferrite ring magnetic powder.
Background
Magnetic materials, which are generally called ferromagnetic materials, are ancient functional materials with wide application, and the magnetism of the materials is known and applied by people as early as 3000 years ago, for example, the ancient Chinese substitutes a natural magnet as a compass. Modern magnetic materials have been widely used in our lives, for example, permanent magnetic materials as motors, iron core materials applied in transformers, magneto-optical disks used as memories, magnetic recording disks for computers, and the like. In terms of large bit information, magnetic materials are closely related to aspects of informatization, automation, electromechanical integration, national defense and national economy. The magnetic material is generally considered to be a substance capable of directly or indirectly generating magnetism from excess elements such as iron, cobalt, nickel, and alloys thereof. Magnetic materials can be classified into soft magnetic materials and hard magnetic materials according to the ease with which demagnetization occurs after magnetization. Substances which are easy to remove magnetism after magnetization are called soft magnetic materials, and substances which are not easy to remove magnetism are called hard magnetic materials. Generally, soft magnetic materials have a relatively small remanence and hard magnetic materials have a relatively large remanence.
The main advantages of magnetic materials are: the composite magnetic material has small density and high impact strength, can be processed by cutting, drilling, welding, laminating, pattern pressing and the like, cannot be cracked when in use, is easy to be processed into products with high dimensional precision, thin walls and complex shapes, is more and more taken into consideration by people at present, and is a promising basic functional material. With the wide application of magnetic materials, magnetic materials are required in more and more fields, and the requirements of the magnetic materials are higher and higher, but the elasticity and the stretchability of the existing magnetic materials are poor and influence the environment.
Disclosure of Invention
The invention aims to provide the permanent magnetic ferrite magnetic ring magnetic powder aiming at the defects and shortcomings of the prior art, rare earth is saved, cost is reduced, and cost performance is high. The addition of other anisotropic magnetic powder with low price in the anisotropic neodymium iron boron not only keeps the higher magnetic performance of the magnet, but also reduces the cost of raw materials and has high cost performance.
In order to achieve the purpose, the invention adopts the following technical scheme: a formula for manufacturing permanent magnetic ferrite magnetic ring magnetic powder comprises the following raw materials in parts by weight: 60-90 parts of anisotropic neodymium iron boron magnetic powder, 5-40 parts of anisotropic samarium cobalt magnetic powder, 0.5-15 parts of anisotropic strontium ferrite magnetic powder, 20-25 parts of ferric oxide, 15-25 parts of bismuth oxide, 12-17 parts of nickel oxide, 10-17 parts of titanium oxide, 11-17 parts of silicon dioxide, 4-7 parts of niobium oxide, 4-6 parts of tantalum oxide, 13-19 parts of graphene, 8-11 parts of epoxy resin, 3-5 parts of manganese oxide, 2.5-3.5 parts of cobalt oxide, 12-14 parts of calcium carbonate, 2-3 parts of dispersing agent, 5-7 parts of adhesive and 1-2 parts of wetting agent.
The particle size of the anisotropic neodymium iron boron magnetic powder is controlled to be 30-240 mu m;
the particle size of the anisotropic samarium cobalt magnetic powder is less than 80 μm;
the grain diameter of the anisotropic strontium ferrite magnetic powder is less than 10 mu m.
A preparation method of permanent magnetic ferrite magnetic ring magnetic powder comprises the working procedures of powder preparation, bonded magnetic powder preparation, warm-pressing forming, primary demagnetization, cooling demoulding and secondary demagnetization solidification, wherein a given mould is used in the working procedure of the bonded magnet warm-pressing forming, and each working procedure is as follows:
powder preparation: respectively weighing 60-90 parts by weight of anisotropic neodymium iron boron magnetic powder with the particle size of 30-240 mu m, 5-40 parts by weight of anisotropic samarium cobalt magnetic powder with the particle size of less than 80 mu m and 0.5-15 parts by weight of anisotropic strontium ferrite magnetic powder with the particle size of less than 10 mu m, putting the components into a stirrer, and uniformly stirring to obtain mixed magnetic powder;
preparing bonded magnetic powder: weighing 100 parts by weight of the mixed magnetic powder, adding 0.5-10 parts by weight of thermosetting resin and 0.01-3 parts by weight of zinc stearate, and continuously stirring uniformly at the temperature of room temperature-120 ℃ to obtain bonded magnetic powder;
the thermosetting resin is bisphenol A type epoxy resin, phenolic aldehyde type epoxy resin or thermosetting phenolic aldehyde resin;
warm-pressing and forming: the prepared bonded magnetic powder is filled into a mold, warm-pressing molding is carried out on the bonded magnetic powder at the forward magnetic field intensity of more than 10.0KGs and at the temperature of 60-180 ℃, the pressure of the warm-pressing molding is controlled to be 200-500 MPa, the pressure maintaining time of the warm-pressing molding is controlled to be 0.1-60 s, and a bonded magnet in the mold is obtained after the warm-pressing molding;
primary demagnetization: carrying out reverse magnetic field demagnetization on the bonded magnet, wherein the strength of the reverse magnetic field is controlled to be 1.0 KGs-20.0 KGs;
cooling and demolding: cooling the bonded magnet after primary demagnetization, wherein air cooling or water cooling is adopted for cooling, the bonded magnet is ejected out of a mold for demolding after 5-10 s of air cooling or water cooling, and the demolding time is controlled within 10-180 s;
and (3) secondary demagnetization and solidification: and (3) placing the bond magnet after demoulding into an oscillating pulse magnetic field for secondary demagnetization, wherein the maximum peak value of the intensity of the oscillating pulse magnetic field is more than 20.0KGs, and the maximum surface magnetism of the bond magnet after secondary demagnetization is required to be less than 50Gs, then placing the bond magnet after secondary demagnetization into an oven, and curing for 0.5-2 h at 100-180 ℃ to prepare the magnet.
After the technical scheme is adopted, the invention has the beneficial effects that: saving rare earth, reducing cost and high cost performance. The addition of other anisotropic magnetic powder with low price in the anisotropic neodymium iron boron not only keeps the higher magnetic performance of the magnet, but also reduces the cost of raw materials and has high cost performance.
Detailed Description
Example 1
A formula for manufacturing permanent magnetic ferrite magnetic ring magnetic powder comprises the following raw materials in parts by weight: 60 parts of anisotropic neodymium iron boron magnetic powder; 5 parts of anisotropic samarium cobalt magnetic powder; 0.5 part of anisotropic strontium ferrite magnetic powder, 20 parts of iron oxide, 15 parts of bismuth oxide, 12 parts of nickel oxide, 10 parts of titanium oxide, 11 parts of silicon dioxide, 4 parts of niobium oxide, 4 parts of tantalum oxide, 13 parts of graphene, 8 parts of epoxy resin, 3 parts of manganese oxide, 2.5 parts of cobalt oxide, 12 parts of calcium carbonate, 2 parts of a dispersing agent, 5 parts of an adhesive and 1 part of a wetting agent.
A preparation method of permanent magnetic ferrite magnetic ring magnetic powder comprises the working procedures of powder preparation, bonded magnetic powder preparation, warm-pressing forming, primary demagnetization, cooling demoulding and secondary demagnetization solidification, wherein a given mould is used in the working procedure of the bonded magnet warm-pressing forming, and each working procedure is as follows:
powder preparation: respectively weighing 60-90 parts by weight of anisotropic neodymium iron boron magnetic powder with the particle size of 30-240 mu m, 5-40 parts by weight of anisotropic samarium cobalt magnetic powder with the particle size of less than 80 mu m and 0.5-15 parts by weight of anisotropic strontium ferrite magnetic powder with the particle size of less than 10 mu m, putting the components into a stirrer, and uniformly stirring to obtain mixed magnetic powder;
preparing bonded magnetic powder: weighing 100 parts by weight of the mixed magnetic powder, adding 0.5-10 parts by weight of thermosetting resin and 0.01-3 parts by weight of zinc stearate, and continuously stirring uniformly at the temperature of room temperature-120 ℃ to obtain bonded magnetic powder;
the thermosetting resin is bisphenol A type epoxy resin, phenolic aldehyde type epoxy resin or thermosetting phenolic aldehyde resin.
Example 2
The present embodiment is different from embodiment 1 in that: the composite material consists of the following raw materials in parts by weight: 65 parts of anisotropic neodymium iron boron magnetic powder; 25 parts of anisotropic samarium cobalt magnetic powder; 5 parts of anisotropic strontium ferrite magnetic powder, 25 parts of iron oxide, 18 parts of bismuth oxide, 15 parts of nickel oxide, 12 parts of titanium oxide, 15 parts of silicon dioxide, 5 parts of niobium oxide, 5 parts of tantalum oxide, 15 parts of graphene, 9 parts of epoxy resin, 4 parts of manganese oxide, 3 parts of cobalt oxide, 13 parts of calcium carbonate, 2.5 parts of a dispersing agent, 6 parts of an adhesive and 2 parts of a wetting agent.
Example 3
The present embodiment is different from embodiment 1 in that: the composite material consists of the following raw materials in parts by weight: 90 parts of anisotropic neodymium iron boron magnetic powder; 40 parts of anisotropic samarium cobalt magnetic powder; 15 parts of anisotropic strontium ferrite magnetic powder, 25 parts of iron oxide, 25 parts of bismuth oxide, 17 parts of nickel oxide, 12 parts of titanium oxide, 15 parts of silicon dioxide, 7 parts of niobium oxide, 6 parts of tantalum oxide, 19 parts of graphene, 11 parts of epoxy resin, 5 parts of manganese oxide, 3.5 parts of cobalt oxide, 14 parts of calcium carbonate, 3 parts of a dispersing agent, 7 parts of an adhesive and 2 parts of a wetting agent.
After the technical scheme is adopted, the invention has the beneficial effects that: saving rare earth, reducing cost and high cost performance. The addition of other anisotropic magnetic powder with low price in the anisotropic neodymium iron boron not only keeps the higher magnetic performance of the magnet, but also reduces the cost of raw materials and has high cost performance.
The above description is only for the purpose of illustrating the technical solutions of the present invention and not for the purpose of limiting the same, and other modifications or equivalent substitutions made by those skilled in the art to the technical solutions of the present invention should be covered within the scope of the claims of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
Claims (8)
1. The magnetic powder of the permanent magnetic ferrite magnetic ring is characterized by comprising the following raw materials in parts by weight: 60-90 parts of anisotropic neodymium iron boron magnetic powder, 5-40 parts of anisotropic samarium cobalt magnetic powder, 0.5-15 parts of anisotropic strontium ferrite magnetic powder, 20-25 parts of ferric oxide, 15-25 parts of bismuth oxide, 12-17 parts of nickel oxide, 10-17 parts of titanium oxide, 11-17 parts of silicon dioxide, 4-7 parts of niobium oxide, 4-6 parts of tantalum oxide, 13-19 parts of graphene, 8-11 parts of epoxy resin, 3-5 parts of manganese oxide, 2.5-3.5 parts of cobalt oxide, 12-14 parts of calcium carbonate, 2-3 parts of dispersing agent, 5-7 parts of adhesive and 1-2 parts of wetting agent.
2. The magnetic powder of the permanent magnetic ferrite ring as claimed in claim 1, which is composed of the following raw materials in parts by weight: 60 parts of anisotropic neodymium iron boron magnetic powder; 5 parts of anisotropic samarium cobalt magnetic powder; 0.5 part of anisotropic strontium ferrite magnetic powder, 20 parts of iron oxide, 15 parts of bismuth oxide, 12 parts of nickel oxide, 10 parts of titanium oxide, 11 parts of silicon dioxide, 4 parts of niobium oxide, 4 parts of tantalum oxide, 13 parts of graphene, 8 parts of epoxy resin, 3 parts of manganese oxide, 2.5 parts of cobalt oxide, 12 parts of calcium carbonate, 2 parts of a dispersing agent, 5 parts of an adhesive and 1 part of a wetting agent.
3. The magnetic powder of the permanent magnetic ferrite ring as claimed in claim 1, which is composed of the following raw materials in parts by weight: 65 parts of anisotropic neodymium iron boron magnetic powder; 25 parts of anisotropic samarium cobalt magnetic powder; 5 parts of anisotropic strontium ferrite magnetic powder, 25 parts of iron oxide, 18 parts of bismuth oxide, 15 parts of nickel oxide, 12 parts of titanium oxide, 15 parts of silicon dioxide, 5 parts of niobium oxide, 5 parts of tantalum oxide, 15 parts of graphene, 9 parts of epoxy resin, 4 parts of manganese oxide, 3 parts of cobalt oxide, 13 parts of calcium carbonate, 2.5 parts of a dispersing agent, 6 parts of an adhesive and 2 parts of a wetting agent.
4. The magnetic powder of the permanent magnetic ferrite ring as claimed in claim 1, which is composed of the following raw materials in parts by weight: 90 parts of anisotropic neodymium iron boron magnetic powder; 40 parts of anisotropic samarium cobalt magnetic powder; 15 parts of anisotropic strontium ferrite magnetic powder, 25 parts of iron oxide, 25 parts of bismuth oxide, 17 parts of nickel oxide, 12 parts of titanium oxide, 15 parts of silicon dioxide, 7 parts of niobium oxide, 6 parts of tantalum oxide, 19 parts of graphene, 11 parts of epoxy resin, 5 parts of manganese oxide, 3.5 parts of cobalt oxide, 14 parts of calcium carbonate, 3 parts of a dispersing agent, 7 parts of an adhesive and 2 parts of a wetting agent.
5. The preparation method of the permanent magnetic ferrite magnetic ring magnetic powder of claim 1, which comprises the procedures of powder preparation, bonded magnetic powder preparation, warm-pressing molding, primary demagnetization, cooling demolding and secondary demagnetization solidification, wherein a given mold is used in the bonded magnet warm-pressing molding procedure, and each procedure is as follows:
powder preparation: respectively weighing 60-90 parts by weight of anisotropic neodymium iron boron magnetic powder with the particle size of 30-240 mu m, 5-40 parts by weight of anisotropic samarium cobalt magnetic powder with the particle size of less than 80 mu m and 0.5-15 parts by weight of anisotropic strontium ferrite magnetic powder with the particle size of less than 10 mu m, putting the components into a stirrer, and uniformly stirring to obtain mixed magnetic powder;
preparing bonded magnetic powder: weighing 100 parts by weight of the mixed magnetic powder, adding 0.5-10 parts by weight of thermosetting resin and 0.01-3 parts by weight of zinc stearate, and continuously stirring uniformly at the temperature of room temperature-120 ℃ to obtain bonded magnetic powder;
the thermosetting resin is bisphenol A type epoxy resin, phenolic aldehyde type epoxy resin or thermosetting phenolic aldehyde resin;
warm-pressing and forming: the prepared bonded magnetic powder is filled into a mold, warm-pressing molding is carried out on the bonded magnetic powder at the forward magnetic field intensity of more than 10.0KGs and at the temperature of 60-180 ℃, the pressure of the warm-pressing molding is controlled to be 200-500 MPa, the pressure maintaining time of the warm-pressing molding is controlled to be 0.1-60 s, and a bonded magnet in the mold is obtained after the warm-pressing molding;
primary demagnetization: carrying out reverse magnetic field demagnetization on the bonded magnet, wherein the strength of the reverse magnetic field is controlled to be 1.0 KGs-20.0 KGs;
cooling and demolding: cooling the bonded magnet after primary demagnetization, wherein air cooling or water cooling is adopted for cooling, the bonded magnet is ejected out of a mold for demolding after 5-10 s of air cooling or water cooling, and the demolding time is controlled within 10-180 s;
and (3) secondary demagnetization and solidification: and (3) placing the bond magnet after demoulding into an oscillating pulse magnetic field for secondary demagnetization, wherein the maximum peak value of the intensity of the oscillating pulse magnetic field is more than 20.0KGs, and the maximum surface magnetism of the bond magnet after secondary demagnetization is required to be less than 50Gs, then placing the bond magnet after secondary demagnetization into an oven, and curing for 0.5-2 h at 100-180 ℃ to prepare the magnet.
6. The method of claim 5, wherein: the particle size of the anisotropic neodymium iron boron magnetic powder is controlled to be 30-240 mu m.
7. The method of claim 5, wherein: the particle size of the anisotropic samarium cobalt magnetic powder is less than 80 μm.
8. The method of claim 5, wherein: the grain diameter of the anisotropic strontium ferrite magnetic powder is less than 10 mu m.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
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| CN201910696708.8A CN112309663A (en) | 2019-07-30 | 2019-07-30 | Permanent magnetic ferrite magnetic ring magnetic powder and preparation method thereof |
| PCT/CN2019/113538 WO2021017219A1 (en) | 2019-07-30 | 2019-10-28 | Magnetic powder for permanent magnetic ferrite magnetic ring and preparation method therefor |
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| CN201910696708.8A CN112309663A (en) | 2019-07-30 | 2019-07-30 | Permanent magnetic ferrite magnetic ring magnetic powder and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115020074A (en) * | 2022-07-21 | 2022-09-06 | 广东力王高新科技股份有限公司 | Energy storage inductor and preparation method thereof |
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| CN104616853A (en) * | 2015-01-29 | 2015-05-13 | 厦门双瑞高磁科技有限公司 | Formula and preparation method for forming bonded magnet with three types of anisotropic magnet powder |
| CN107500606A (en) * | 2017-09-28 | 2017-12-22 | 江苏新旭磁电科技有限公司 | A kind of magnetic material formula |
| CN109411172A (en) * | 2018-09-04 | 2019-03-01 | 徐州远洋磁性材料有限公司 | A kind of magnetic material |
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- 2019-07-30 CN CN201910696708.8A patent/CN112309663A/en active Pending
- 2019-10-28 WO PCT/CN2019/113538 patent/WO2021017219A1/en active Application Filing
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115020074A (en) * | 2022-07-21 | 2022-09-06 | 广东力王高新科技股份有限公司 | Energy storage inductor and preparation method thereof |
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Application publication date: 20210202 |