A kind of coated magnetic abrasive grain and its preparation method

A magnetic abrasive grain, coated technology, applied in the direction of magnetic materials, magnetic objects, inorganic materials, etc., can solve the problem that mechanical grinding is not directly applied, and achieve the effect of low cost, simple process and small particles

Inactive Publication Date: 2020-06-26
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] According to the retrieved patents, the patent CN 201510176768.9 of SiO2-coated Fe3O4 mainly produces a composite material with a particle size distribution at the nanometer level, and is mainly used in the fields of medicine and sewage adsorption. It has not yet been used in mechanical grinding. direct application

Method used

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  • A kind of coated magnetic abrasive grain and its preparation method
  • A kind of coated magnetic abrasive grain and its preparation method
  • A kind of coated magnetic abrasive grain and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The raw materials used in the embodiment are as follows:

[0031] The molar ratio of ferrous chloride and ferric chloride is 1:2 according to the iron ion; the molar ratio of Fe ion and ammonia water ammonium ion is 1:3, and the concentration is 25% ammonia water 90ml; ferric oxide: modifier The mass ratio is 1:3, weigh 1g of ferric oxide and 3g of sodium citrate modifier; add ethanol: water at a ratio of 1:5 to configure 60ml of ethanol-water solution; according to ethyl orthosilicate: The volume ratio of the solution is 1:20, add 3ml of tetraethyl orthosilicate; add 30ml of ammonia water at the ratio of ammonia water: solution volume ratio of 1:2, and add dropwise at a rate of 2 drops / second.

[0032] The preparation steps are as follows:

[0033] (1) Put the ferrous chloride and ferric chloride into the beaker according to the molar ratio of ferric ion as 1:2, weigh 8.57g of ferrous chloride and 11.6504g of ferric chloride respectively.

[0034] (2) Add 400ml of di...

Embodiment 2

[0050] A coated magnetic abrasive grain of the present invention is basically the same in composition and preparation process as the coated magnetic abrasive grain of Example 1, the difference is that the quality of ferrous chloride and ferric chloride in the step is selected as 7.95g and 16.22g, thus preparing ferric oxide with different particle sizes.

[0051] The preparation steps are as follows:

[0052] (1) Weigh ferrous chloride and ferric chloride according to the molar ratio of ferric ion as 1:1.5, respectively weigh 7.05g of ferrous chloride and 16.22g of ferric chloride into a beaker.

[0053] (2) Add 200ml of distilled water into the beaker, stir at a speed of 350r / min to disperse it evenly in the distilled water, make a solution with a certain concentration, and seal it with plastic wrap.

[0054] (3) Put the above solution on a constant temperature stirrer, adjust the speed to 300r / min, adjust the temperature to 50 degrees, and stir at constant temperature for a...

Embodiment 3

[0066] A coated magnetic abrasive grain of the present invention is basically the same in composition and preparation process as the coated magnetic abrasive grain of Example 1, the difference is that the quality of ferrous chloride and ferric chloride in the step is selected as 8.57g and 11.6504g, thus preparing ferric oxide with different particle sizes.

[0067] The preparation steps are as follows:

[0068] (1) Put ferrous chloride and ferric chloride into the beaker according to the molar ratio of ferric ion as 1:1.5, weigh 8.57g of ferrous chloride and 11.6504g of ferric chloride respectively.

[0069] (2) Add 400ml of distilled water to the beaker, stir at a speed of 400r / min to disperse it evenly in the distilled water, make a solution with a certain concentration, and seal it with plastic wrap.

[0070] (3) Put the above solution on a constant temperature stirrer, adjust the speed to 500r / min, adjust the temperature to 50 degrees, and stir at constant temperature for...

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Abstract

Provided are a coated magnetic abrasive particle and a preparation method thereof. The iron ion based molar ratio of iron dichloride to ferric chloride of the coated magnetic abrasive particle is 1 to 1-3, the molar ratio of Fe ions to ammonia water ammonia ions is 1 to 2-7, the mass ratio of ferroferric oxide to a modifying agent is 1 to 5, an ethyl alcohol-water solution is prepared according to the ethyl alcohol-water proportion of 1 to 5, and the volume ratio of tetraethoxysilane to the solution is 1 to 20-30. Preparation is performed according to the volume ratio of ammonia water to the solution. The preparation method comprises the preparation steps that 1, the iron dichloride, the ferric chloride, the ammonia water, the modifying agent, ethyl alcohol, the tetraethoxysilane and distilled water are weighed; 2, the distilled water and the ferric chloride and the iron dichloride are mixed and prepared into a solution; 3, the ammonia water is added for stirring; 4, drying is performed; 5, a drying product, an activator and distilled water are prepared into a solution, and dispersion is performed; 6, the alcohol-water solution is added for stirring; 7, the tetraethoxysilane is dropwise added; 8, the ammonia water is dropwise added and is stirred; 9, drying is performed after product suction filtration. The coated magnetic abrasive particle is low in cost and easy to recover.

Description

technical field [0001] The invention relates to the field of surface finish processing of mechanical parts, in particular to a coated magnetic abrasive grain and a preparation method thereof. Background technique [0002] With the development of modern high-speed and high-precision equipment, the surface quality of mechanical parts has an important impact on the assembly accuracy, performance and service life of the whole machine. Therefore, higher and higher requirements are placed on the surface quality of parts. Surface finishing Processing has become a necessary process in modern product manufacturing. [0003] Magnetic grinding is to use the external magnetic force acting between the abrasive tool and the workpiece to attract magnetic abrasive particles to form a "flexible magnetic brush" to improve the surface quality of the workpiece. Among them, magnetic abrasives play a decisive role in grinding efficiency, precision, and surface quality, and are the main factors t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F1/11C01G49/08C09K3/14
CPCC01G49/08C09K3/1436H01F1/112
Inventor 侯志燕陈红玲杨胜强李唯东刘静
Owner TAIYUAN UNIV OF TECH
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