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Process method capable of improving breaking limit of permanent magnetic ferrite magnetic shoe device

A technology of permanent magnet ferrite and process method, applied in the field of permanent magnet ferrite, can solve the problem that the particle size state of wet ball abrasive powder cannot be completely reflected, and achieve the effect of improving the flexural limit

Active Publication Date: 2021-04-13
SINOSTEEL TIANYUAN MAANSHAN TONGLI MAGNETIC MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the secondary ball mill particle size value provided by this patent is only a measurement equivalent average value, which cannot fully reflect the particle size state of the wet ball mill powder, and the patent does not focus on the secondary sintering reaction of the particle size distribution. Improvement at the level of mechanism impact

Method used

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  • Process method capable of improving breaking limit of permanent magnetic ferrite magnetic shoe device
  • Process method capable of improving breaking limit of permanent magnetic ferrite magnetic shoe device
  • Process method capable of improving breaking limit of permanent magnetic ferrite magnetic shoe device

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Control slurry particle size

[0045] The raw material formula used in the preparation of the permanent ferrite magnetic tile device in this embodiment is: permanent magnet strontium ferrite pre-fired powder 600-800kg, waste magnetic steel powder 500-700kg, grinding powder 100-300kg, calcium carbonate 12-16kg, silicon oxide 1.5-4.5kg, boric acid 1.5-4.5kg, wherein, the average particle diameter of raw materials is 3-8 microns.

[0046] The permanent magnet ferrite magnetic tile device of this embodiment is prepared by using the above raw materials mixed uniformly and then undergoing ball milling, pressing, sintering and grinding in sequence. Wherein, in this embodiment, only by improving the ball milling time, the particle size distribution after ball milling can satisfy D0.10: 0.4-0.6 μm, D0.50: 0.8-1.0 μm, D0.90: 1.9-2.0 μm.

[0047] Specifically, a process method for improving the flexural limit of a permanent ferrite magnetic tile device, the steps are:

[0048] (...

Embodiment 2

[0062] Improved Green Density Consistency

[0063] This embodiment is a process method for improving the flexural limit of permanent ferrite magnetic tile devices, which is basically the same as that of Embodiment 1-1, the difference is that in this embodiment, the single-cavity grouting flow rate is increased during the pressing process , Grouting pressure, and grouting time to improve the consistency of green body density.

[0064] Specifically, the suppression control process is as follows:

[0065] Control method: grouting pressure, grouting time, grouting flow rate

[0066] Grouting pressure range: 2-4MPa before improvement (comparative example 2), 6-12MPa after improvement (this embodiment)

[0067] Grouting time range: 1-4s before improvement (comparative example 2), 7-15s after improvement (this embodiment)

[0068] Single-cavity grouting flow rate range: 50-80mm / s before improvement (comparative example 2), 15-40mm / s after improvement (this embodiment)

Embodiment 3

[0075] surface polishing

[0076] This embodiment is a process for improving the flexural limit of permanent ferrite magnetic tile devices, which is basically the same as that of embodiment 2-1. number.

[0077] Concrete, present embodiment grinding wheel is as follows:

[0078] Control method: fine grinding wheel mesh

[0079] Grinding wheel mesh range: 80-120 mesh before improvement (comparative example 3), 150-400 mesh after improvement (this embodiment)

[0080] As shown in Table 3, 25 finished magnetic tiles from Comparative Example 3, Example 3-1, Example 3-2, and Example 3-3 were taken respectively, and their flexural limits were tested.

[0081] Table 3 Comparative Example 3 and Example 3-1, Example 3-2, and Example 3-3 The flexural limit of the finished magnetic tile

[0082]

[0083]

[0084] As can be seen from Table 3, the flexural limit of the finished product of Example 3-1 is 16.87% higher than that of Comparative Example 3, the flexural limit of the f...

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Abstract

The invention discloses a process method capable of improving the breaking limit of a permanent magnetic ferrite magnetic shoe device, and belongs to the technical field of permanent magnetic ferrites. The method comprises the steps of ball milling, pressing, sintering and grinding of raw materials, wherein the particle size distribution of the ball-milled raw materials is controlled to be D0.10:(0.4-0.6) mu m, D0.50: (0.8-1.0) mu m and D0.90: (1.9-2.0) mu m; a mold is adopted for pressing, and the single-cavity grouting flow rate of the mold is 15-40 mm / s; and in the grinding process, the mesh number of the adopted grinding wheel is 150-400. According to the invention, the breaking strength is improved while the magnetic performance of the ferrite is not damaged.

Description

technical field [0001] The invention belongs to the technical field of permanent magnet ferrite, and more specifically relates to a process method for improving the bending resistance limit of permanent magnet ferrite magnetic tile devices. Background technique [0002] Magnetic materials are the basic functional materials in the electronics industry. As an important part of magnetic materials, permanent magnet materials play an important role in electronics industry, information industry, motorcycle, electric tool industry, automobile industry and other industries. Permanent ferrite materials are functional materials that generate magnetic fields. Permanent ferrite belongs to an inorganic non-metallic sintered material, which has high hardness and low toughness. The customer's motor company caused quality loss. On the other hand, the production process of permanent magnet ferrite magnetic tile devices is divided into several main stages: slurry (powder) ball milling-press...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/26C04B35/622
CPCC04B35/26C04B35/62204C04B2235/3208C04B2235/3409C04B2235/3418C04B2235/6022C04B2235/6567C04B2235/96
Inventor 马宝高原尹春龙杨冲赵麟城舒云峰蒋伟丽芦运吴林熹彭正佺张伟
Owner SINOSTEEL TIANYUAN MAANSHAN TONGLI MAGNETIC MATERIAL
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