Solvothermal method for preparing nano ferroferric oxide powder

Abstract

The invention relates to a solvothermal method for preparing nano ferroferric oxide powder. The method comprises steps of weighing a proper amount of ferric chloride hexahydrate and sodium bicarbonate, respectively dissolving into ethylene glycol so as to prepare a mixed solution A and a mixed solution B; adding a proper amount of polyvinylpyrrolidone into the solutions to be taken as surfactant; adding the mixed solution B into the mixed solution A so as to prepare brick-red mixed solution; then sealing in a high pressure reactor with teflon as the lining, putting into an air dry oven and heating for a while, after cooling down the reaction liquid, separating, washing, vacuum drying so as to obtain black powder. The solvothermal method has the advantages of having simple processes, being convenient to operate, being easily available in raw materials, being economical and efficient and environmentally friendly, and being suitable for volume production.

Description

technical field [0001] The invention relates to the preparation of a supermagnetic material and a soft magnetic material, in particular to a method for preparing nanometer iron tetroxide powder by solvothermal. Background technique [0002] Nano-ferroferric oxide has excellent magnetic characteristics and unique surface effects, small size effects, quantum size effects, and macroscopic quantum tunneling effects, making it widely used in magnetic storage materials, microwave absorption, special coatings, drug targeting guidance, magnetic multi- It has important application prospects in functional composite materials, catalysts and bioengineering. However, due to the large specific surface energy of nanoparticles, they are easy to coagulate and agglomerate to form secondary particles, and lose the characteristics of nanoparticles, which brings great difficulties to the preparation and preservation of nanomaterials. Obtaining nanoparticles with small particle size, narrow part...

AI Technical Summary

Problems solved by technology

From the existing literature and patents, its preparation process is mainly through the raw materials such as different iron salts (ferric or ferrous salts), alkalis, solvents, surfactants, reducing agents or oxidizing agents at different temperatures, reaction times and Under pressure and other reaction conditions, the target product is directly generated and indirectly prepared, but the above preparation process is different in preparation cost, process conditions, environmental friendliness, preparation scale, etc.