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An orientation device for improving magnetic powder of a microwave absorbing magnetic sheet and an implementation method thereof

An implementation method and technology of magnetic powder, applied in the manufacture of inductors/transformers/magnets, electrical components, circuits, etc., can solve the problems of limiting the permeability of wave-absorbing magnetic sheets, limited orientation effect, etc., and achieve good orientation effect and small magnetic leakage. , the effect of improving consistency

Active Publication Date: 2019-01-04
HENGDIAN GRP DMEGC MAGNETICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the magnetic powder orientation of the wave-absorbing magnetic sheet belongs to mechanical orientation, that is, the orderly arrangement of the magnetic powder is achieved during the process of the slurry passing through the scraper. However, this orientation effect is limited, especially when the slurry is relatively viscous and the filling ratio of the magnetic powder is relatively high. In the case of high, this greatly limits the improvement of the magnetic permeability of the absorbing magnetic sheet

Method used

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  • An orientation device for improving magnetic powder of a microwave absorbing magnetic sheet and an implementation method thereof
  • An orientation device for improving magnetic powder of a microwave absorbing magnetic sheet and an implementation method thereof
  • An orientation device for improving magnetic powder of a microwave absorbing magnetic sheet and an implementation method thereof

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Embodiment 1

[0032] see Figure 1-3 , the present invention provides the following technical solutions: an orientation device for improving the magnetic powder of a wave-absorbing magnetic sheet, comprising a sleeve 1 and a permanent magnet 2, the permanent magnet 2 includes several cylindrical magnets, and the permanent magnet 2 is located inside the sleeve 1, and the sleeve The tube 1 is a non-magnetic member, and the sleeve 1 and the permanent magnet 2 are bonded by a non-magnetic adhesive.

[0033] Further, the cylindrical magnet is a sintered NdFeB magnet or a sintered ferrite magnet.

[0034] Further, the casing 1 is a stainless steel member or a polymer material member.

[0035] Further, the non-magnetic adhesive is epoxy resin.

[0036] Further, the magnetic field strength of the permanent magnet 2 is 200Gs-600Gs.

[0037] Further, the length of the casing 1 is 100mm-600mm; the thickness of the wall of the casing 1 is 10mm-80mm.

[0038] Further, the realization method of the d...

Embodiment 2

[0047] The difference between this embodiment and embodiment 1 is that no orientation device is added, that is, the slurry in embodiment 1 is used. Except that no orientation device is added, other processes and parameters are completely the same. After testing, the magnetic permeability of the magnetic sheet is 115 at a frequency of 2MHz;

[0048] According to the test results of Example 1 and Example 2, it is shown that by adding an orientation device, the magnetic permeability of the magnetic sheet is significantly improved. Under the same conditions of raw materials and other experimental conditions, the improvement of the magnetic permeability is mainly due to the presence of scaly magnetic powder. Increased orientation in adhesives. Therefore, the magnetic field orientation device provided by the present invention can improve the orientation degree of the scaly magnetic powder in the binder.

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Abstract

The invention discloses an orientation device for improving magnetic powder of a microwave absorbing magnetic sheet, comprises a sleeve and a permanent magnet, wherein the permanent magnet comprises aplurality of cylindrical magnets, and the permanent magnet is positioned inside the sleeve, the sleeve is a non-magnetic conductive member, and the sleeve and the permanent magnet are bonded througha non-magnetic adhesive; the invention also discloses an implementation method of the orientation device for improving the magnetic powder of a microwave absorbing magnetic sheet; The orientation device provided by the invention has small magnetic flux leakage, is safe and reliable, is not limited by the width of the tape casting film, can conduct magnetic field orientation of a wide tape castingfilm, and is favorable for improving production efficiency.

Description

technical field [0001] The invention belongs to the technical field of wave-absorbing material manufacturing, and in particular relates to an orientation device for improving wave-absorbing magnetic sheet magnetic powder and a realization method thereof. Background technique [0002] High-permeability wave-absorbing magnetic sheet material is mainly made of scaly magnetic powder and polymer binder through casting process, and is widely used in consumer electronics products to absorb and shield electromagnetic noise radiated by components . The main performance index of the absorbing magnetic sheet is the magnetic permeability, the higher the magnetic permeability, the better the electromagnetic noise suppression effect. [0003] The factors affecting the magnetic permeability of the absorbing magnetic sheet material mainly include the intrinsic characteristics of the magnetic powder, the filling ratio and the degree of orientation arrangement. In order to obtain higher mag...

Claims

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Application Information

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IPC IPC(8): H01F41/02
CPCH01F41/0253
Inventor 刘立东韩相华郝斌
Owner HENGDIAN GRP DMEGC MAGNETICS CO LTD
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