CN111477421A - Soft magnetic powder capable of improving pressure resistance of molded inductor and manufacturing method thereof - Google Patents
Soft magnetic powder capable of improving pressure resistance of molded inductor and manufacturing method thereof Download PDFInfo
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- CN111477421A CN111477421A CN201910066684.8A CN201910066684A CN111477421A CN 111477421 A CN111477421 A CN 111477421A CN 201910066684 A CN201910066684 A CN 201910066684A CN 111477421 A CN111477421 A CN 111477421A
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- soft magnetic
- magnetic powder
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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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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
- B22F1/16—Metallic particles coated with a non-metal
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- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Soft Magnetic Materials (AREA)
- Coils Or Transformers For Communication (AREA)
Abstract
The invention discloses soft magnetic powder capable of improving the pressure resistance of a molded inductor and a manufacturing method thereof. The technical scheme of the invention is as follows: the soft magnetic powder comprises the following components in percentage by mass: 80-85% of iron powder; 2-2.3% of an adhesive; 0.1-1% of ceramic material; 10-16.5% of a diluent. The manufacturing method comprises the following steps: 1) placing the mixed adhesive and the ceramic material in a container to be uniformly mixed; (2) mixing the mixed solution and iron powder in a closed container and uniformly stirring to form a semi-dry paste; (3) putting the obtained semi-dry paste into a screen granulator for extrusion granulation to form a semi-finished product; (4) screening the obtained semi-finished product by a vibrating screen machine to form a qualified product and a recyclable waste material; (5) and drying the qualified product by using drying equipment to form a product. The scheme provided by the invention can reduce the reduction range of the insulation resistance of the die-pressed inductance product after the die-pressed inductance product passes through the furnace, and has the advantages of simple manufacturing method and low manufacturing cost.
Description
Technical Field
The invention relates to the technical field of soft magnetic materials for molded inductors, in particular to soft magnetic powder capable of improving the pressure resistance of the molded inductors and a manufacturing method thereof.
Background
A device in which a soft magnetic powder core is made of a metallic soft magnetic material having distributed air gaps and in which ferromagnetic powder is mixed and pressed with an insulating medium, and a coil is embedded in the powder and then pressed together is called a die inductor.
The phenomenon that the insulation impedance of the inductor formed by pressing is greatly reduced under the condition of SMD packaging-reflow oven exists in the current stage, along with the development of electronic devices, the working voltage of the molded inductor is higher and higher, the working environment temperature is worse and worse, when the inductor is in voltage-resistant failure, the whole product is possibly short-circuited greatly, and serious burn-out accidents are caused, so that the technology for reducing the change has a key significance for the development of the molded inductor industry in the future.
Disclosure of Invention
Aiming at the defects in the prior art, the invention mainly aims to provide soft magnetic powder capable of reducing the reduction range of insulation resistance of a molded inductor product after the molded inductor product passes through a furnace and a manufacturing method thereof.
In order to achieve the purpose, the invention provides the following technical scheme: the soft magnetic powder capable of improving the pressure resistance of the molded inductor comprises the following components in percentage by mass: 80-85% of iron powder; 2-2.3% of an adhesive; 0.1-1% of ceramic material; 10-16.5% of a diluent.
Preferably, the adhesive comprises 80-86.5% of epoxy resin by mass percent; 5-15% of a curing agent; 0.5-6% of a coupling agent.
Preferably, the iron powder accounts for 80-81% of the total mass of the soft magnetic powder in percentage by mass.
A manufacturing method of soft magnetic powder capable of improving pressure resistance of a molded inductor is characterized by comprising the following steps:
(1) placing the mixed adhesive and the ceramic material in a container to be uniformly mixed;
(2) mixing the solution mixed in the step (1) with iron powder in a closed container and uniformly stirring to form a semi-dry paste;
(3) putting the semi-dry paste obtained in the step (2) into a screen mesh granulator for extrusion granulation to form a semi-finished product;
(4) screening the semi-finished product obtained in the step (3) by using a vibrating screen machine to obtain a qualified product and a recyclable waste material;
(5) and drying the qualified product by using drying equipment to form a product.
Compared with the prior art, the invention has the advantages that the insulating material, namely the ceramic material, is added in the raw material components, so that the ceramic material is coated on the surfaces of the iron powder, the interval between the iron powder is increased, the mutual contact between the iron powder is hindered, and the great reduction of the insulation impedance of the inductor under the condition of SMD packaging-reflow furnace is reduced. The cost is low, the manufacturing difficulty is small, and the effect of improving the pressure resistance of the molded inductor is obvious.
Detailed Description
The present invention is further described below.
The soft magnetic powder capable of improving the pressure resistance of the molded inductor comprises the following components in percentage by mass: 80-85% of iron powder; 2-2.3% of an adhesive; 0.1-1% of ceramic material; 10-16.5% of a diluent.
Preferably, the adhesive comprises 80-86.5% of epoxy resin by mass percent; 5-15% of a curing agent; 0.5-6% of a coupling agent.
Preferably, the iron powder accounts for 80-81% of the total mass of the soft magnetic powder in percentage by mass.
A manufacturing method of soft magnetic powder capable of improving pressure resistance of a molded inductor is characterized by comprising the following steps:
(1) placing the mixed adhesive and the ceramic material in a container to be uniformly mixed;
(2) mixing the solution mixed in the step (1) with iron powder in a closed container and uniformly stirring to form a semi-dry paste;
(3) putting the semi-dry paste obtained in the step (2) into a screen mesh granulator for extrusion granulation to form a semi-finished product;
(4) screening the semi-finished product obtained in the step (3) by using a vibrating screen machine to obtain a qualified product and a recyclable waste material;
(5) and drying the qualified product by using drying equipment to form a product.
According to the scheme, the insulating material, namely the ceramic material, is added to the raw material components, so that the ceramic material is coated on the surfaces of the iron powders, the intervals between the iron powders are increased, and the mutual contact between the iron powders is hindered, so that the insulation impedance of the inductor is greatly reduced under the condition of SMD packaging-reflow oven. The cost is low, the manufacturing difficulty is small, and the effect of improving the pressure resistance of the molded inductor is obvious.
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.
Claims (4)
1. The soft magnetic powder capable of improving the pressure resistance of the molded inductor is characterized by comprising the following components in percentage by mass: 80-85% of iron powder; 2-2.3% of an adhesive; 0.1-1% of ceramic material; 10-16.5% of a diluent.
2. The soft magnetic powder capable of improving the voltage resistance of a molded inductor as claimed in claim 1, wherein: the adhesive comprises 80-86.5% of epoxy resin by mass percent; 5-15% of a curing agent; 0.5-6% of a coupling agent.
3. The soft magnetic powder capable of improving the voltage resistance of a molded inductor as claimed in claim 1, wherein: the iron powder accounts for 80-81% of the total mass of the soft magnetic powder in percentage by mass.
4. A manufacturing method of soft magnetic powder capable of improving pressure resistance of a molded inductor is characterized by comprising the following steps:
(1) placing the mixed adhesive and the ceramic material in a container to be uniformly mixed;
(2) mixing the solution mixed in the step (1) with iron powder in a closed container and uniformly stirring to form a semi-dry paste;
(3) putting the semi-dry paste obtained in the step (2) into a screen mesh granulator for extrusion granulation to form a semi-finished product;
(4) screening the semi-finished product obtained in the step (3) by using a vibrating screen machine to obtain a qualified product and a recyclable waste material;
(5) and drying the qualified product by using drying equipment to form a product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910066684.8A CN111477421A (en) | 2019-01-24 | 2019-01-24 | Soft magnetic powder capable of improving pressure resistance of molded inductor and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910066684.8A CN111477421A (en) | 2019-01-24 | 2019-01-24 | Soft magnetic powder capable of improving pressure resistance of molded inductor and manufacturing method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111477421A true CN111477421A (en) | 2020-07-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910066684.8A Pending CN111477421A (en) | 2019-01-24 | 2019-01-24 | Soft magnetic powder capable of improving pressure resistance of molded inductor and manufacturing method thereof |
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| CN (1) | CN111477421A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114101687A (en) * | 2021-12-07 | 2022-03-01 | 鞍山安特磁材有限公司 | Novel pressure-resistant magnetic powder |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107552777A (en) * | 2017-09-05 | 2018-01-09 | 昆山玛冀电子有限公司 | A kind of powder particle composition and production technology for inductance production |
| CN107731452A (en) * | 2017-11-07 | 2018-02-23 | 安徽大学 | One kind cast inductance and preparation method thereof |
| CN108492954A (en) * | 2018-04-23 | 2018-09-04 | 合肥羿振电力设备有限公司 | A kind of inductance composite material and preparation method |
-
2019
- 2019-01-24 CN CN201910066684.8A patent/CN111477421A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107552777A (en) * | 2017-09-05 | 2018-01-09 | 昆山玛冀电子有限公司 | A kind of powder particle composition and production technology for inductance production |
| CN107731452A (en) * | 2017-11-07 | 2018-02-23 | 安徽大学 | One kind cast inductance and preparation method thereof |
| CN108492954A (en) * | 2018-04-23 | 2018-09-04 | 合肥羿振电力设备有限公司 | A kind of inductance composite material and preparation method |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114101687A (en) * | 2021-12-07 | 2022-03-01 | 鞍山安特磁材有限公司 | Novel pressure-resistant magnetic powder |
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Application publication date: 20200731 |
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| RJ01 | Rejection of invention patent application after publication |