Preparation of nano-ferriferrous oxide

A technology of ferroferric oxide and nanometer, which is applied in the field of preparation of nanometer ferroferric oxide by solvothermal method, which can solve the problems of easy agglomeration of ferroferric oxide magnetic particles, impossibility of large-scale application, unfavorable preparation of magnetic particles, etc. Achieve good dispersion, narrow particle distribution and high product yield

Inactive Publication Date: 2008-12-17
HANGZHOU NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At the same time, the addition of alkali solution needs to strictly control the speed, otherwise non-magnetic hydrolyzate will be generated. When strong alkali solution (such as sodium hydroxide, etc.) is added to the mixed salt solution, some iron ion hydrolyzate will be generated, which is not conducive to

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0019] Weigh 8.1 g FeCl 3 , 10 grams of NaOH, ultrasonic 40kHz dispersed in 100 ml of ethylene glycol. Put it into a stirred autoclave, and react at 160° C. for 24 hours.

[0020] Centrifuge the above reactants, wash them repeatedly with ethanol and deionized water, until there is no residual ethylene glycol and sodium hydroxide on the surface, measure the pH to 7.0 with a pH detector, and then dry them in vacuum at 70°C for 12 hours. The final product can be obtained. The product is a spherical granular product with good dispersibility.

Embodiment 2

[0022] Weigh 8.1 g FeCl 3 , 12 grams of NaOH, ultrasonic 40kHz dispersed in 100 ml of ethylene glycol. Put it into a stirred autoclave, and react at 160° C. for 24 hours.

[0023] Centrifuge the above reactants, wash them repeatedly with ethanol and deionized water, until there is no residual ethylene glycol and sodium hydroxide on the surface, measure the pH with a pH detector to 7.01, and then vacuum dry at 70°C for 12 hours, that is The final product can be obtained. The product is a spherical granular product with good dispersibility.

Embodiment 3

[0025] Weigh 8.1 g FeCl 3 , 14 grams of NaOH, ultrasonic 40kHz dispersed in 100 ml of ethylene glycol. Put it into a stirred autoclave, and react at 160° C. for 24 hours.

[0026] Centrifuge the above reactants, wash them repeatedly with ethanol and deionized water, until there is no residual ethylene glycol and sodium hydroxide on the surface, measure the pH with a pH detector to 7.01, and then vacuum dry at 70°C for 12 hours, that is The final product can be obtained. The product is a spherical granular product with good dispersibility.

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Abstract

The invention discloses a chemical processing method, in particular to a preparation method for utilizing a solvothermal method to synthesize nano iron oxide. The invention adopts a certain amount of ferric chloride and dissolves the ferric chloride into a certain amount of methanol, ethanol or glycol and then a certain amount of sodium hydroxide is added, and later ultrasonic sound is adopted to equally disperse the mixture, and then the prepared mixture is transferred into a hydro-thermal reactor for a hydro-thermal processing under the temperature of 140 to 200 DEG C, and de-ethanol and/or deionized water for reaction liquid are adopted to wash reactants, and a centrifuge is adopted to remove the glycol solution and spare sodium hydroxide; the reactant is dried to obtain the iron oxide powder. The invention has the advantages that the method is simple, safe and reliable; the material is cheap; the output is high; the dispersity is better and the grain distribution is narrow, etc. The invention can be widely used by iron oxide manufacturers.

Description

technical field [0001] The invention relates to a chemical process, in particular to a preparation method for synthesizing nano-ferric iron tetroxide by a solvothermal method. Background technique [0002] Nano ferroferric oxide magnetic powder is a new type of high-function, high value-added fine inorganic chemical product facing the 21st century, because it has special properties incomparable to general bulk materials and Therefore, it can be widely used in the fields of national defense, surface engineering, environmental engineering, chemical industry, electronic materials, and semiconductor materials, etc., and has very broad application prospects. Although some manufacturers at home and abroad have produced block or micron ferroferric oxide magnetic powder deep processing products, the nano deep processing products basically remain at the laboratory level or trial production stage. If the nano-deep processing products whose price is relatively close to that of bulk ma...

Claims

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Application Information

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IPC IPC(8): C01G49/08
Inventor 来国桥张飞豹邓元
Owner HANGZHOU NORMAL UNIVERSITY
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