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A method for preparing magnetic abrasive particles by sol-gel method

A magnetic abrasive particle and gel method technology, applied in chemical instruments and methods, other chemical processes, etc., can solve the problems of uneven mixing of abrasive particles and magnetic media, and difficulty in crushing, achieving low cost and simplifying the preparation process. , the effect of improving performance

Active Publication Date: 2020-10-02
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention provides a method for preparing magnetic abrasive grains by a sol-gel method in order to overcome the problem of uneven mixing of the abrasive grain phase and the magnetic medium phase and the difficulty of crushing in the traditional magnetic abrasive grain preparation method. The magnetic abrasive grains can be Direct molding, mixing evenly, no need to break

Method used

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  • A method for preparing magnetic abrasive particles by sol-gel method
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Examples

Experimental program
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Effect test

Embodiment 1

[0017] Embodiment 1: the preparation of aluminum oxide monohydrate:

[0018] (1) Preparation of aluminum sol: Mix 10g of aluminum isopropoxide and 87.66ml of deionized water according to the molar ratio of 1:100, prepare 88ml of mixed solution, stir at a speed of 300r / min for 5min, mix well, and mix according to HNO 3 : Aluminum isopropoxide: The molar ratio of deionized water is 1:2:200, add 1.4ml of HNO dropwise 3 , the addition rate is controlled at 1 drop / second, continue to stir and mix, and then put it in a water bath, heat up the water bath to 90°C, seal the plastic wrap and mechanically stir for 10 hours, and continue to mechanically stir for 1.5 hours with the open mouth, and control the stirring speed to 300r / min, forming aluminum sol;

[0019] The reaction principle is: .

[0020] (2) Preparation of AlOOH (alumina monohydrate) particles: After aging the aluminum sol at room temperature for 12 hours, put it in a drying oven, control the temperature in the drying...

Embodiment 2

[0022] Embodiment 2: the preparation of Fe-AlOOH magnetic abrasive grain:

[0023] (1) Preparation of iron-based particles: Mix 5g of citric acid and distilled water at a mass ratio of 1:10 and dissolve in distilled water to prepare a citric acid-distilled aqueous solution with a pH value of 2, according to the mass ratio of carbonyl iron powder to citric acid Weigh 1.6g of 3-5um carbonyl iron powder at a ratio of 1:3 and add it to the prepared citric acid-distilled aqueous solution to form A liquid, then place it in an ultrasonic disperser for ultrasonic dispersion for 30 minutes, stir for 30 minutes to mix evenly, and then put A liquid Filtration, washing, drying, and the dried powder is evenly ground to form iron-based particles;

[0024] (2) Preparation of aluminum sol: Mix 10g of aluminum isopropoxide and 87.66ml of deionized water according to the molar ratio of 1:100 to form 88ml, stir at a speed of 300r / min for 5min, mix well, and mix according to HNO 3 : Aluminum iso...

Embodiment 3

[0033] Embodiment 3: A method for preparing magnetic abrasive particles by a sol-gel method, mixing carbonyl iron powder, citric acid, and distilled water to make carbonyl iron powder-citric acid distilled aqueous solution, drying it, and grinding the dried powder into iron base particles; aluminum isopropoxide was dissolved in deionized water, and then HNO was added dropwise in aqueous isopropanol 3 After the addition is completed, heat in a water bath and stir to form an aluminum sol; add dry and ground iron-based particles to the aluminum sol and stir to form an iron-based aluminum sol, and after aging at room temperature, dry in a drying oven to form Fe-AlOOH magnetic abrasive particles .

[0034] Specific steps are as follows:

[0035] (1) Preparation of iron-based particles: Mix 5g of citric acid and distilled water at a mass ratio of 1:10 and dissolve in distilled water to prepare a citric acid-distilled aqueous solution with a pH value of 2, according to the mass rati...

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Abstract

The invention belongs to the technical field of surface finishing processing of mechanical parts. In order to solve the problems that during traditional magnetic abrasive particle preparation, an abrasive grain phase and a magnetic medium phase are mixed unevenly, and crushing is very hard, the invention provides a method for preparing magnetic abrasive particles through a sol-gel method. Carbonyliron powder, citric acid and distilled water are mixed to prepare a solution, the solution is dried, and dried powder is ground into iron-based particles; aluminium isopropoxide is dissolved in deionized water, HNO3 is dropwise added into an aluminium isopropoxide aqueous solution, after dropping is completed, water-bath heating and stirring are conducted to form alumina sol; the dried ground iron-based particles are added into the alumina sol, stirring is conducted to form iron-based alumina sol, and after ageing is conducted at a room temperature, drying is conducted in a drying box to formthe Fe-AlOOH magnetic abrasive particles. A process is simple, easy, fast and convenient, and the magnetic abrasive particles are smaller in particle size; crushing and screening are not needed; theperformance of the abrasive particles is improved, and the service life of the abrasive particles is prolonged; the particles are small, the process is simple, crushing is not needed, the magnetic response performance is good, the cost is low, and recovery is easy.

Description

technical field [0001] The invention belongs to the technical field of surface finish processing of mechanical parts, and in particular relates to a method for preparing magnetic abrasive grains by a sol-gel method. Background technique [0002] With the continuous improvement of science and technology, high-precision, high-performance, and high-efficiency processing equipment have come out one after another. The performance requirements and precision requirements of the equipment restrict the development of high-performance equipment and materials. Therefore, the surface quality of the equipment needs to be continuously improved to meet the performance and precision requirements of the equipment, and precision surface finishing technology is an indispensable process. [0003] In surface finishing technology, magnetic grinding is one of the processes with high efficiency, low cost and high processing quality. When the magnetic abrasive grains are placed in an external magnet...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K3/14
CPCC09K3/1436
Inventor 侯志燕陈红玲杨胜强李唯东白旭
Owner TAIYUAN UNIV OF TECH
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