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A Method for Evaluation of Magnetic Properties of Bonded Permanent Magnet Ferrite Powder

A technology of bonding permanent magnets and evaluation methods, which is used in the measurement of magnetic properties, inductance/transformer/magnet manufacturing, electrical components, etc., and can solve the problems of large degree of freedom of product shape and inability to effectively evaluate the magnetic field and magnetic flux on the surface of magnetic powder. To meet the needs of understanding, quick and easy detection methods, and accurate evaluation

Active Publication Date: 2019-12-17
BGRIMM TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] (2). The shape of the product has a large degree of freedom: such as rings, columns, sheets, blocks, tiles and other complex shapes;
Although this patent can evaluate the magnetic field and magnetic properties of magnetic materials, it cannot effectively evaluate the surface magnetic field and magnetic flux formed by magnetic powder.

Method used

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  • A Method for Evaluation of Magnetic Properties of Bonded Permanent Magnet Ferrite Powder
  • A Method for Evaluation of Magnetic Properties of Bonded Permanent Magnet Ferrite Powder
  • A Method for Evaluation of Magnetic Properties of Bonded Permanent Magnet Ferrite Powder

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0084] This embodiment is a further description of the present invention.

[0085] In this embodiment, the magnetic properties of the bonded permanent ferrite magnetic powder are evaluated by measuring the magnetic properties of the sixteen-pole magnetic ring formed by the bonded permanent magnet ferrite powder. This embodiment is not limited to the sixteen-pole magnetic ring, and is also applicable to other multi-pole magnetic components.

[0086] First, the surface-treated permanent ferrite magnetic powder is mixed with a binder to form a bonded permanent ferrite magnetic powder.

[0087] Surface treatment of permanent ferrite magnetic powder. Use silane coupling agent KH-590 for surface treatment of ferrite magnetic powder. Preferably, weigh 1kg of permanent ferrite powder, dilute 10ml of KH-590 coupling agent with absolute ethanol into a 10% standard solution; mix the permanent ferrite powder with the standard solution evenly, and place the mixed solution in Dry in a dr...

Embodiment 2

[0139] This embodiment is a further improvement and description of the device for manufacturing a multi-pole magnetic component in Embodiment 1. The same content as in Embodiment 1 will not be repeated.

[0140] The apparatus for manufacturing a multi-pole magnetic component in the present invention comprises at least two orientation magnets distributed on a hollow ring-shaped base formed of a non-magnetically permeable material. At least two orientation magnets are used on the annular base to make the multi-pole magnetic components in the annular base form multi-pole magnetic characteristics in the magnetic field in a fixed manner. At least two clamping positions for detachably fixing the orientation magnetic field are provided on the outer side of the annular base. Ring bases include circular ring bases, rectangular ring bases or regular polygonal ring bases.

[0141] Figure 4 It is a preferred embodiment of the apparatus for manufacturing multi-pole magnetic components ...

Embodiment 3

[0153] This embodiment further improves and explains the multi-pole magnetic components in the previous embodiments, and the same content will not be described again.

[0154] A multi-pole magnetic part is formed by bonded permanent ferrite magnetic powder in a multi-pole injection mold for manufacturing the multi-pole magnetic part. The magnetic properties of bonded permanent ferrite magnetic powders were evaluated by measuring the magnetic properties of multi-pole magnetic components. Wherein, the integrally formed multi-pole magnetic component includes a first circular ring arranged concentrically, a second circular ring with an inner diameter larger than the outer diameter of the first circular ring, and at least two spokes connecting the first circular ring and the second circular ring , the height of the first ring is greater than the height of the second ring.

[0155] The spokes are radially distributed, and the central extension lines of the spokes converge at a poin...

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Abstract

The invention relates to a method for evaluating magnetic properties of bonded permanent magnet ferrite magnetic powder, and is characterized in that the method comprises the steps of placing bonded permanent magnet ferrite magnetic powder in an apparatus for manufacturing a multipolar magnetic member to form a multipolar magnetic member, and evaluating magnetic properties of the bonded permanent magnet ferrite magnetic powder by measuring the magnetic properties of the multipolar magnetic member; and the apparatus for manufacturing the multipolar magnetic member comprises at least two orientation magnets distributed on a ring-shaped base formed of a non-magnetic material, the at least two orientation magnets being used for enabling the multipolar magnetic member in the ring-shaped base to form multipolar magnetic properties in a magnetic field on the ring-shaped base in a fixed manner. The invention tests the surface magnetic field and magnetic flux by injection-molding the bonded permanent magnetic ferrite magnetic powder into the multipolar magnetic member, and evaluates the magnetic properties by the surface magnetic field and magnetic flux. The evaluation result is more accurate and effective, and the needs of manufacturers to learn the surface magnetic field and magnetic flux of the magnetic powder are met.

Description

technical field [0001] The invention relates to the technical field of bonded permanent ferrite magnetic powder, in particular to a method for evaluating the magnetic properties of bonded permanent ferrite magnetic powder. Background technique [0002] In 1933, Kato and Takei developed cubic cobalt ferrite, which opened the prelude to the research of permanent ferrite oxides. Then barium ferrite and strontium ferrite came out one after another. Today, permanent ferrite materials It has become an indispensable basic material in various industrial production fields. At present, permanent ferrite can be divided into sintered permanent magnet and bonded permanent magnet according to the molding process. The former is prepared by traditional powder metallurgy process, while the latter is prepared by calendering or injection molding process. [0003] Bonded magnet is a kind of composite material prepared by mixing magnetic powder, binder and other additives uniformly in a certain...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R33/12H01F41/02
CPCG01R33/12H01F41/0266
Inventor 邹科刘荣明胡国辉王倩贾立颖高磊王永齐廖有良滕阳民李炳山
Owner BGRIMM TECH CO LTD