A kind of mechanochemical method prepares the method for cobalt ferrite nanoparticle

A technology of cobalt ferrite and nanoparticles, which is applied in the field of spinel-type magnetic cobalt ferrite nanoparticles and its preparation, can solve the problems of high cost, complicated production process, and low yield, and achieve low cost, The effect of less energy consumption and simple preparation method
CN102276246AInactive Publication Date: 2011-12-14YANCHENG INST OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
YANCHENG INST OF TECH
Publication Date
2011-12-14
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a method for mechanochemically preparing spinel magnetic cobalt ferrite nanoparticles. The steps of the method are: weighing an appropriate amount of cobalt salt, iron salt and citric acid according to a certain molar ratio, adding an appropriate amount of absolute ethanol to mix evenly, adding zirconium balls, and the mass ratio of the ball material is 2:1; The material is put into a high-energy planetary grinding tank, and ground at 200-600r / min. The material is ground under the action of mechanical force for 5-10 hours to obtain a wet gel. The wet gel is dried at 100°C and placed in a high-temperature furnace. Calcining at 500° C. for 4 hours, the spinel-type magnetic cobalt ferrite nanoparticles can be obtained. The chemical formula of this ferrite is CoxFeyO4, where x+y=3, the average grain size is 40-100 nm, the shape is spherical, regular tetrahedral or regular octahedral, and the saturation magnetization is 25-60 emu / g. The invention has the advantages of simple process, less energy consumption, easy control of production links, and easy realization of industrialized production; it solves the problems of high cost, high energy consumption, complicated process and the like in the prior art.
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Description

technical field

[0001] The invention belongs to the field of magnetic nanometer materials, and in particular relates to a spinel-type magnetic cobalt ferrite nanoparticle and a preparation method thereof. Background technique

[0002] Magnetic cobalt ferrite with spinel structure is an excellent soft magnetic material with unique physical, chemical and magnetic properties. They are often used as magnetic recording materials, stealth absorbing materials, key materials of magnetic refrigeration technology and biomedical materials, etc. They have broad application prospects in the fields of aviation, electronics, metallurgy, chemical industry, biology, medicine and environmental protection. At present, the methods for preparing ferrite mainly include sol-gel method, chemical co-precipitation method, hydrothermal method, solid-phase reaction method, etc. Patent CN101486492A discloses a method for preparing spinel ferrite by chemical co-precipitation method The method is to prec...

Claims

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