Unlock instant, AI-driven research and patent intelligence for your innovation.

Crystallite-cladded sintered magnet, and its manufacturing method, motor and binding magnet

A technology for sintered magnets and a manufacturing method, which is applied to magnetic circuits characterized by magnetic materials, permanent magnets, magnetic properties of inorganic materials, etc., can solve the problems of unreasonable pre-sintering and sintering temperatures, high production costs, and low degree of orientation. problem, to achieve the effect of scientific addition order, convenient operation and reasonable ratio

Active Publication Date: 2007-02-14
HENGDIAN GRP DMEGC MAGNETICS CO LTD
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention also solves the problems existing in the prior art that due to the pursuit of a high degree of orientation and the use of toxic dispersants or lubricants that are not conducive to environmental protection, causing environmental pollution, the degree of orientation is not high, the temperature of pre-sintering and sintering is not very reasonable, and the production Technical problems such as high cost; provide a formula and manufacturing method of magnet powder, sintered magnet with high degree of orientation and low cost using an environmentally friendly and non-toxic organic surfactant as a dispersant

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] The following raw materials are used as raw materials:

[0045] Fe2O3 powder (purity ≥ 99.2wt%, original average particle size of particles: 1.0um) 85.6wt%

[0046] SrCO3 powder (purity ≥ 98.0wt%, original average particle size of particles: 2.1um) 12.9wt%

[0047] Add raw materials and additives in a wet ball mill, mix them, then dry them, pre-fire them in the air at 1280°C, and keep them warm for 2 hours to obtain granular calcined materials, which have ferrite: SrFe12O19.

[0048] To the obtained ferrite calcined material SrFe12O19, add 0.4wt% dispersant, then in the continuous type dry vibrating ball mill, the calcined material is carried out coarse pulverization and added additives are carried out dry type coarse pulverization for 10 minutes, after the pulverization The average particle size of the powder was 4.2 μm.

[0049] Next, weigh 450 grams of coarsely pulverized materials produced in the above-mentioned manner, La2O3 powder (purity ≥ 99.0wt%, original ave...

Embodiment 2

[0055] The following raw materials are used as raw materials:

[0056] Fe2O3 powder (purity=99.2wt%, original average particle size of particles: 1.0um) 81.8wt%

[0057] BaCO3 powder (purity=98.0wt%, original average particle size of particles: 2.1um) 17.3wt%

[0058] Add raw materials and additives in a wet ball mill, mix them, then dry them, pre-fire them in the air at 1280°C, and keep them warm for 2 hours to obtain granular calcined materials, which have ferrite: BaFe12O19.

[0059] The dispersant of 0.4wt% is added to the calcined material of gained, subsequently calcined material is carried out coarse pulverization and added additive carry out the dry type coarse pulverization of 10 minutes in continuous type dry vibrating ball mill, the average of the powder material after pulverizing The particle size is 4.0 μm.

[0060] Next, weigh 450 grams of coarse pulverized materials produced in the above-mentioned manner, La2O3 powder (purity ≥ 99.0wt%, original average partic...

Embodiment 3

[0066] The following raw materials are used as raw materials:

[0067] Fe2O3 powder (purity=99.2wt%, original average particle size of particles: 1.0um) 88.6wt%

[0068] CaCO3 powder (purity=98.0wt%, original average particle size of particles: 2.1um) 10.1wt%

[0069] Use the following materials as additives

[0070] SiO2: powder (purity=99.0wt%, original average particle size of particles: 0.5um) 0.2wt%

[0071] BaCO3: powder (purity=99.0wt%, original average particle size of particles: 1.5um) 0.2wt%

[0072] Add raw materials and additives in a wet ball mill, mix them, then dry them, pre-fire them in the air at 1280°C, and keep them warm for 2 hours to obtain granular calcined materials, which have ferrite: BaFe12O19.

[0073] Then, take by weighing 450 grams of calcined material produced in the above-mentioned manner, add 0.7wt% La2O3, 0.9wt% Co2O3, 1.0wt% Al2O3, and then add 680 milliliters of deionized water as a ball milling medium to prepare the crushing material pu...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
particle sizeaaaaaaaaaa
diameteraaaaaaaaaa
heightaaaaaaaaaa
Login to View More

Abstract

The invention relates to a sintered magnet surrounding with crystal grain and the manufacturing method. It adopts motor and bonded permanent magnet that uses ferrite as raw material. The invention has the following advantages: improving Hcj value and enhancing the capability of ferrite; enhancing compactness of sintered magnet, improving Br value and the magnetic performance of ferrite; sharply decreasing the cost of raw material that is benefit for manufacturing.

Description

technical field [0001] The invention relates to a hexagonal permanent magnet ferrite magnetic material, in particular to a sintered magnet wrapped with crystal grains and a manufacturing method thereof, as well as a motor and a bonded magnet using the ferrite as a manufacturing material. Background technique [0002] Ferrite magnetic material is a kind of sintered permanent magnet material, including calcium ferrite, strontium ferrite and barium ferrite. This kind of magnetic material not only has strong anti-demagnetization performance, but also has the advantage of low cost. Ferrite magnets have high hardness and are brittle, requiring special machining processes. The anisotropic magnet has been magnetized along the orientation direction because the particles have been oriented and arranged during molding, so the performance in this direction is very high. The isotropic magnet can be magnetized in any direction because it has no orientation, but its performance is lower t...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H01F1/11H02K1/02H01F7/02
Inventor 何时金何震宇何军义
Owner HENGDIAN GRP DMEGC MAGNETICS CO LTD