Rubber ferromagnetic oxide powder and preparation method thereof

A ferrite magnet, rubber and plastic technology, applied in the direction of magnets, magnetic objects, electrical components, etc., can solve the problems of high production cost, magnetic powder particle size, inability to meet performance requirements, poor mechanical properties of magnetic strips, etc., to achieve control of grain growth , high magnetic properties, good mechanical properties

Inactive Publication Date: 2009-06-03
BGRIMM TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the ferrite magnetic powder produced by this patent is aimed at the production of magnetic powder raw materials for shock absorption and noise reduction in the prior art. The process cycle is long, the production cost is high, and the particle size of the magnetic powder is too fine. Although the produced magnetic powder can meet the requirements of making automobile damping plates However, the texture of calcined balls is loose and fragile, the content of

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Mix 500g of iron red with a purity of 98.5%, APD of 0.8μm, and a Cl content of 0.5% with 108g of barium carbonate with a purity of 98.8%, and add 1.2g of SiO 2 , 3.6g CaCO 3 and 10gSrCl 2 ·6H 2 O, use a vibrating mill to mix and make a mixture.

[0036]After pelletizing the mixture with water, use an electric furnace to sinter at 1150°C for 2 hours. After cooling, use a dry ball mill to coarsely crush until the APD is about 2.8 μm, and then use a ball mill to wet finely grind (the mass of coarse powder and water The ratio is about 0.5-1:1) to APD about 1.4μm, dried until the water content is less than 1%, and dispersed with a high-speed pulverizer to obtain magnetic powder.

[0037] Put 15g of magnetic powder into a cylindrical mold with a diameter of 25.2mm, under the molding pressure of 1ton / cm 2 After being pressed under certain conditions, the measured compressive density (CD) value is 3.04g / cm 3 .

[0038] After heating and mixing 16.4g of the above-mentioned...

Embodiment 2

[0040] Mix 500 g of iron red with a purity of 98.5%, an APD of 0.8 μm, and a Cl content of 0.5%, with 81 g of strontium carbonate with a purity of 97.9%, and add 1.1 g of SiO 2 , 3.5gCaCO 3 and 5g SrCl 2 ·6H 2 O, use a vibrating mill to mix and make a mixture.

[0041] After the mixture is pelletized with water, it is sintered at 1120°C for 2 hours using an electric furnace. After cooling, use a dry ball mill to coarsely crush until the APD is 3.1 μm, then use a ball mill to wet finely grind to an APD of 1.5 μm, dry until the moisture is less than 1%, and then disperse with a high-speed pulverizer.

[0042] Put 15g of magnetic powder into a cylindrical mold with a diameter of 25.2mm, under the molding pressure of 1ton / cm 2 After being pressed under certain conditions, the measured CD value is 3.01g / cm 3 .

[0043] After heating and mixing 16.4g of the above-mentioned magnetic powder and 1.6g of paraffin wax evenly, put them into a cylindrical mold with a diameter of 25.2...

Embodiment 3

[0045] Mix 500 g of iron red with a purity of 98.5%, an APD of 0.8 μm, and a Cl content of 0.5%, and 108 g of barium carbonate with a purity of 98.8%, and add 3.2 g of CaCO 3 and 10g SrCl 2 ·6H 2 O, use a vibrating mill to mix and make a mixture.

[0046] After the mixture is pelletized with water, it is sintered at 1160°C for 2 hours using an electric furnace. After cooling, use a dry ball mill to coarsely crush until the APD is 3.0 μm, then use a ball mill to wet finely grind it to an APD of 1.5 μm, dry it until the moisture is less than 1%, and then disperse it with a high-speed pulverizer.

[0047] Put 15g of magnetic powder into a cylindrical mold with a diameter of 25.2mm, under the molding pressure of 1ton / cm 2 After being pressed under certain conditions, the measured CD value is 2.98g / cm 3 .

[0048] After heating and mixing 16.4g of the above-mentioned magnetic powder and 1.6g of paraffin wax evenly, put them into a cylindrical mold with a diameter of 25.2mm, an...

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PUM

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Abstract

The invention provides a rubber ferromagnetic oxide powder and a production process thereof. Iron red and strontium carbonate or barium carbonate are adopted as raw materials, an additive which is favorable to the low-temperature pre-sintering effect improvement and the growth control of crystal grains is preferably added, and a magnetic powder with higher magnetic property and processing property is obtained through the pre-sintering and pulverizing processes, and is suitable to be as a raw material of products such as seals of refrigerator doors, magnetic seals of doors and windows and advertising magnets. The invention has the advantages that the annealing process is not required in the process of preparing the ferromagnetic oxide powder, thereby reducing manufacture cost, lowering energy consumption, and reducing emission.

Description

technical field [0001] The invention relates to a widely used production process of permanent magnet rubber-plastic ferrite magnetic powder, in particular to a rubber-plastic ferrite magnetic powder suitable for use as raw materials for refrigerator door seals, door and window magnetic seals and advertising tiles, and its Preparation. Background technique [0002] The raw materials used to manufacture refrigerator door seals, door and window magnetic seals and other products are rubber-plastic barium ferrite or strontium ferrite magnetic powder, and their demand is growing rapidly with the increase in consumption of refrigerators, automobiles and other products. The production of rubber-plastic ferrite magnetic powder generally adopts Chinese invention patent 88102993.9, and the name of the invention is the method disclosed in "Ba ferrite rubber-plastic magnetic powder and its preparation method". The method uses iron scale as raw material, and after mixing, pre-calcining, ...

Claims

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Application Information

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IPC IPC(8): C04B35/26C04B35/622H01F7/00
Inventor 吕宝顺连江滨廖有良要继忠
Owner BGRIMM TECH CO LTD
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