Method for preparing flower-shaped spinelle cobalt ferrite powder

Abstract

The invention provides a preparation method for floriated spinelle cobalt ferrite powder. The method procedure is that: a certain quantity of saturated oxalic acid solution is measured; corresponding quantities of cabaltous nitrate and ferric nitrate are weighted according to a ratio of preparing 0.002mol of ferrite by per 100ml of the saturated oxalic acid solution, wherein, the theoretical stoichiometric proportion of the ferrite is 1:2, and the cabaltous nitrate and the ferric nitrate are added into the oxalic acid solution; 0.2 to 0.5g PEG of surface active agent is added and stirred for 0.5 to 1.0 hour to prepare well-proportioned mixture solution; NaOH is used for regulating the PH value to be 12 and the well-proportioned mixture solution is stirred with magnetic force at room temperature for 0.5 to 1.0 hour until the sample generates a lot of precipitates; heating and stirring are carried out for 2 to 3 hours in a water-bath with the temperature of 75 DEG C to 85 DEG C to get a precursor; the precursor is washed sequentially by alcohol and distilled water for a plurality of times; the precursor is dried at the temperature of 80 DEG C; the dried precursor is ground into refined powder; and the refined power is roasted for 6 hours at the temperature of 800 DEG C. The floriated ferrite prepared by the invention has the advantages of high purity quotient, simple technique, being easy to control the pattern and low cost. Compared with a traditional coprecipitation method, a small quantity of the surface active agent is added to assist the formation of the floriated spinelle cobalt ferrite before regulating the PH value.

Description

Preparation method of flower-shaped spinel cobalt ferrite powder (1) Technical field The invention relates to a method for preparing an inorganic non-metallic magnetic material, in particular to a method for preparing flower-shaped spinel cobalt ferrite powder. (2) Background technology In recent years, the research on the preparation of oxides with special morphology has attracted widespread attention at home and abroad, and many oxides with special morphology (such as ZnO, TiO2, etc.) have been reported one after another. The crystals that have been prepared include nanoribbon crystals, nanowalls, tubes, rings, columnar arrays, nanoflowers, tetragonal crowns, hexagonal stars, pencils, columnar arrays, hexagonal helices, and wheat circle structures. Since the size and shape of nanoparticles have a significant impact on their physical and chemical properties, nanomaterials with special morphology have significant changes in properties compared to bulk materials. The curre...

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Problems solved by technology

Moreover, the co-precipitation method has realized the synthesis of rod-shaped, flower-shaped binary oxides (such as ZnO, CeO2, etc.), but due to the existence of a large number of tetrahedral and octahedral vacancies in the crystal structure of ferrite, its morphology is controlled. It is more difficult than simple binary oxides, so so far, the cobalt ferrite synthesized by co-precipitation method is mostly granular, and there is no report on the synthesis of flower-shaped ferrite

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