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Permanent ferrite magnetic tile and preparation method thereof

A technology of permanent ferrite and production method, which is applied in the direction of permanent magnet, inorganic material magnetism, stator/rotor body manufacturing, etc., can solve problems such as cracking of magnetic tiles, reduce shrinkage rate, improve comprehensive performance, and improve mechanical strength Effect

Inactive Publication Date: 2008-06-18
CHANGZHOU DIER MAGIC MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, during the operation of the motor, it bears a large centrifugal force, that is, tensile stress, which can easily lead to cracking of the magnetic tile.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] (1), batching: according to 1# in table 1, strontium oxide, iron red and calcium carbonate are mixed to form calcined material;

[0038] (2) Pre-fired material ball milling: put the pre-fired material into a ball mill for ball milling, so that the pre-fired material is fully and evenly mixed, and the particles of the pre-fired material are ≤ 2 μm;

[0039] (3) Block making and pre-firing: add water to the mixed pre-fired material and stir evenly to make the pre-fired material viscous, press it into a block type, put it in the furnace and burn it at a temperature of 1260°C±10°C for a period of time Controlled at 5h, the propulsion speed is 38min / board to 40min / board;

[0040] (4), pulverization: put the sintered block material into a pulverizer for pulverization, and the particle size of the powder material is less than or equal to 3.5 μm when discharging;

[0041] (5), mixing material: according to 1# in table 1, add other additives except silicate fiber in mixing mate...

Embodiment 2

[0048] (1), batching: according to 2# in table 1, strontium oxide, iron red and calcium carbonate are mixed to form calcined material;

[0049] (2) Ball milling of pre-sintered material: put the above-mentioned pre-sintered material into a ball mill for ball milling, so that the pre-sintered material is fully and evenly mixed, and the particles of the pre-sintered material are ≤ 2 μm;

[0050] (3) Block making and pre-firing: add water and stir the mixed pre-fired material evenly to make the pre-fired material viscous, and press it into a block shape, put it into the furnace and burn it at a temperature of 1270°C±10°C, The time is controlled at 4h, and the advancing speed is 40-45min / board;

[0051] (4), pulverization: put the sintered block material into a pulverizer for pulverization, and the particle size of the powder material is less than or equal to 3.5 μm when discharging;

[0052] (5) Mixing: According to 2# in 1, add other additives except silicate fiber to the mixin...

Embodiment 3

[0059] (1), ingredients: mix strontium oxide, iron red and calcium carbonate according to 3# in Table 1 to form pre-fired material;

[0060] (2) Pre-sintered material ball milling: put the pre-sintered material into a ball mill for ball milling, so that the pre-sintered material is fully and evenly mixed, and the particles of the pre-sintered material are ≤ 2 μm;

[0061] (3) Block making and pre-firing: add water to the mixed pre-fired material and stir evenly to make the pre-fired material viscous, and press it into a block shape, put it in the furnace and burn it at a temperature of 1270°C±5°C, The time is controlled at 4h, and the advancing speed is 42-45min / board;

[0062] (4), pulverization: put the sintered block material into a pulverizer for pulverization, and the particle size of the powder material is less than or equal to 3.5 μm when discharging;

[0063] (5), mixing material: by 3# in table 1, add other additives except silicate fiber in mixing material and mix e...

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Abstract

The invention relates to a permanent ferrite magnetic arc and the manufacturing method thereof, belonging to a manufacturing field of a motor permanent ferrite. Weight proportions of main material components and additive components are as the following: main materials: 8.7 to 9.0 percent of strontium oxide; 86 to 87 percent of iron oxide red; additives: 0.6 to 1.0 percent of calcium carbonate; 0.6 to 1.0 percent of aluminum oxide; 0.4 to 0.8 percent of chrome oxide; 0.3 to 0.6 percent of boric acid; 0.3 to 0.5 percent of silicon oxide; 0.2 to 0.4 percent of cobalt oxide; 0.2 to 0.4 percent of lanthanum oxide and 0.1 to 0.3 percent of silicate fiber. The invention is provided with high surplus magnetic induction strength and high intrinsic coercivity so as to enhance a mechanical strength of the magnetic arc.

Description

technical field [0001] The invention relates to a permanent magnet ferrite magnetic tile and a manufacturing method thereof, belonging to the field of permanent magnet ferrite manufacturing of motors. Background technique [0002] Permanent ferrite anisotropic sintered magnetic tiles are among many permanent magnet materials. With the best cost performance, they have become the most widely used and produced permanent magnet materials in the world. They are widely used in large exciters, auxiliary exciters, Motors in aircraft; small ones such as floppy drive and hard drive motors used in computers, motors in information products, electric bicycle motors, automobile motors, and many motors are required to be able to withstand high and low temperature, vibration, shock and DC electromagnetic field interference. Work. Since the permanent magnet ferrite magnetic tile is a key component in a DC motor, higher requirements are placed on the magnetic performance of the magnetic tile...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F1/10H01F7/02C04B35/64H02K15/03
Inventor 汤华伟汤晓东
Owner CHANGZHOU DIER MAGIC MATERIALS
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