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Method for preparing Fe3O4 magnetic fluid

A magnetic fluid, fe3o4 technology, applied in the direction of magnetic liquid, inductor/transformer/magnet manufacturing, ferrous oxide, etc., can solve the problems of high cost, low yield, difficult control of shape and particle size, etc. Achieve the effects of low production cost, simple equipment, and easy industrial production

Inactive Publication Date: 2014-01-22
HEILONGJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the invention is to solve the existing method to prepare Fe 3 o 4 Fe in the magnetic fluid 3 o 4 The shape and particle size are not easy to control, the yield is low and the cost is high, and Fe 3 o 4 Preparation method of magnetic fluid

Method used

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  • Method for preparing Fe3O4 magnetic fluid
  • Method for preparing Fe3O4 magnetic fluid
  • Method for preparing Fe3O4 magnetic fluid

Examples

Experimental program
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specific Embodiment approach 1

[0022] Specific implementation mode one: this implementation mode is Fe 3 o 4 The preparation method of magnetic fluid is specifically completed according to the following steps:

[0023] 1. Preparation of iron oleate: ①To FeCl with a concentration of 0.1mol / L~1mol / L 3 A solvent is added to the aqueous solution to obtain FeCl 3 The mixed solution of / solvent; 2. to the FeCl that step 1. 3 Add a sodium oleate / solvent mixed solution with a sodium oleate concentration of 0.5 mol / L to 3 mol / L into the mixed solution of solvent / solvent, and stir at a temperature of 40°C to 80°C for 1h to 6h to obtain oleic acid The mixed liquid of iron; 3. use the separatory funnel to separate the mixed liquid containing ferric oleate obtained in step 1. 2. to obtain wet ferric oleate; Vacuum drying under the condition of ℃~120℃ for 6h~24h to obtain dry iron oleate;

[0024] The solvent described in step 1. is one or a mixture of several of them in methanol, ethanol, ethylene glycol and glycero...

specific Embodiment approach 2

[0036] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is: the FeCl concentration of 0.3mol / L to 0.8mol / L described in step 1. 3 A solvent is added to the aqueous solution to obtain FeCl 3 / solvent mixture. Other steps are the same as in the first embodiment.

specific Embodiment approach 3

[0037] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is: the FeCl obtained to step one 1. described in step one 2. 3 Add a sodium oleate / solvent mixed solution with a sodium oleate concentration of 1 mol / L to 2.5 mol / L into the mixed solution of solvent / solvent, and stir for 2 hours to 5 hours at a temperature of 50°C to 80°C to obtain oleic acid Iron mixed liquid. Other steps are the same as those in Embodiment 1 or 2.

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Abstract

The invention provides a method for preparing an Fe3O4 magnetic fluid, and relates to a method for preparing magnetic fluids. The method aims at solving the problems that an existing method for preparing the Fe3O4 magnetic fluid is not easy to control Fe3O4 morphology and particle size, low in productive rate and high in cost. The method includes the steps of 1 ferric oleate preparing, 2 stirring and 3 heating. The method for preparing the Fe3O4 magnetic fluid has the advantages that the morphology and the particle size of Fe3O4 in the Fe3O4 magnetic fluid prepared through the method are controllable, equipment required by the Fe3O4 magnetic fluid prepared through the method is simple, production cost is low, the productive rate of the Fe3O4 magnetic fluid prepared by the method is higher than 90%, and industrial production of the Fe3O4 magnetic fluid can be achieved easily. The Fe3O4 magnetic fluid prepared through the method can be applied to the fields of vacuum motive seals, loudspeakers, dampers, shock absorbers and mineral separation.

Description

technical field [0001] The invention relates to a preparation method of magnetic fluid. Background technique [0002] Magnetic fluid is a kind of magnetic liquid material, which has important application value in vacuum dynamic seal, loudspeaker, damper, shock absorber, ore dressing and so on. However, the current preparation method is very complicated, and the magnetic fluid prepared by the thermal decomposition method has many advantages such as simple preparation, strong magnetism, good compatibility, and low cost, and can be more widely used. The traditional methods for preparing magnetic fluid mainly include: 1. Preparation of Fe by co-precipitation method 3 o 4 , and then dispersed into different carrier liquids to obtain magnetic fluids. 2. Obtain Fe by thermal decomposition of iron pentacarbonyl, iron acetylacetonate, etc. 3 o 4 , and then dispersed into different carrier liquids to obtain magnetic fluids. These two methods prepare Fe 3 o 4 Fe in the magnetic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F1/44H01F41/02C01G49/08
Inventor 付宏刚布和巴特尔田春贵田国辉潘凯
Owner HEILONGJIANG UNIV