Preparation of nano-ferriferrous oxide

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...

AI Technical Summary

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 the formation of magnetic particles. preparation

And the ferroferric oxide magnetic particles prepared by the above method are easy to agglomerate, the crystal form is not good, and the process is difficult to control

Therefore, it is limited in practical applications and cannot be used in large quantities