Preparation method of iron composite oxide functional powder material

A technology of composite oxides and functional powders, applied in the directions of nickel oxide/nickel hydroxide, iron oxide/iron hydroxide, etc., can solve the problem that nanometerization is not suitable, does not fundamentally solve the inhomogeneity of precursor composition, composite Oxide grain size cannot be accurately controlled, etc., to achieve the effect of wide variety, uniform and stable composition

Active Publication Date: 2015-07-08
CHONGQING ZHONGGONG NEW MATERIALS
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Problems solved by technology

However, the above-mentioned technical method does not fundamentally solve the deviation and inhomogeneity of the precursor composition; at the same time, the systematic control of the grain size of the composite oxide cannot be accurately controlled; and this technology is suitable for the preparation of micron-sized oxides , nanosizing is not suitable for

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  • Preparation method of iron composite oxide functional powder material

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Embodiment 1

[0040] A method for preparing an iron composite oxide functional powder material, comprising the following steps:

[0041] A. For the preparation of the unit salt solution, according to the requirements of the designed functional iron composite oxide components, the water-soluble process of the salt of the relevant alloy elements or the preparation of the acid-soluble metal materials of the relevant alloy elements are respectively carried out.

[0042] With Zn 0.44 Ni 0.56 Fe 2 o 4 ferrite as an example, that is, Sb x Ba y Sr z Cr a Cu b mn c Zn d Ni e co f Mg g Fe 2 o 4 Type, where x=0, y=0, z=0, a=0, b=0, c=0, d=0.44, e=0.56, f=0, g=0; Zn / Ni / Fe three The alloying elements are in a molar ratio of 0.44:0.56:2 and the weighing unit salts zinc chloride, nickel chloride, and ferrous chloride (ferric chloride) are dissolved in water respectively; or metal zinc, metal nickel, and metal iron are dissolved in hydrochloric acid to prepare A unit salt solution with a pH...

Embodiment 2

[0054] A method for preparing an iron composite oxide functional powder material, comprising the following steps:

[0055] A. Preparation of the unit salt solution According to the requirements of the designed functional iron composite oxide components, the water-soluble process of the salt of the relevant alloy elements or the preparation of the acid-soluble metal materials of the relevant alloy elements are respectively carried out.

[0056] Take Cu 0.02 Zn 0.42 Ni 0.56 Fe 2 o 4 ferrite as an example, that is, Sb x Ba y Sr z Cr a Cu b mn c Zn d Ni e co f Mg g Fe 2 o 4 Type, where x=0, y=0, z=0, a=0, b=0.02, c=0, d=0.42, e=0.56, f=0, g=0; Cu / Zn / Ni / Fe The four alloying elements are dissolved in water at a molar ratio of 0.02:0.44:0.56:2. The weighing unit salts copper chloride, zinc chloride, nickel chloride, and ferrous chloride (ferric chloride) are respectively dissolved in water; or metal copper, Metal zinc, metal nickel, and metal iron are used to prepare...

Embodiment 3

[0066] A method for preparing an iron composite oxide functional powder material, comprising the following steps:

[0067] A. Preparation of the unit salt solution According to the requirements of the designed functional iron composite oxide components, the water-soluble process of the salt of the relevant alloy elements or the preparation of the acid-soluble metal materials of the relevant alloy elements are respectively carried out.

[0068] With Zn 0.44 mn 0.56 Fe 2 o 4 ferrite as an example, that is, Sb x Ba y Sr z Cr a Cu b mn c Zn d Ni e co f Mg g Fe 2 o 4 Type, where x=0, y=0, z=0, a=0, b=0, c=0.56, d=0.44, e=0, f=0, g=0; Zn / Mn / Fe three The alloying elements are dissolved in water respectively in the weighing unit salt zinc chloride, manganese chloride, and ferric chloride (or ferric chloride) at a molar ratio of 0.44:0.56:2; or the metal zinc, metal nickel, and metal iron are dissolved in hydrochloric acid to prepare The unit salt solution with a pH val...

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Abstract

The invention provides a preparation method of an iron composite oxide functional powder material, which adopts a process of preparing the iron composite oxide functional powder material through micro-droplet high-temperature continuous hydrolysis, thermal double decomposition and recrystallization. The method comprises the steps of separately dissolving multiple salts or preparing a unit salt solution from acid-soluble metal, and proportionally mixing to obtain a mixed multi-element salt solution according to the design; performing boiling point concentration prehydrolysis and micro-droplet high-temperature continuous hydrolysis, thermal double decomposition and recrystallization on the mixed multi-element salt solution to obtain an iron composite oxide; finally, preparing a multi-element iron composite oxide (ferrate and ferrite) powder functional material. Without adding any precipitating agent, the method provided by the invention is suitable for industrial mass production in preparation of all iron-based functional composite oxides and 90% of the metal oxide powder; the method can be used for preparing metal oxide powder with the particle size of 10-30,000nm, and the product composition is uniform and stable; the acid medium is recycled, pollutant discharge is avoided, and the process is environment-friendly.

Description

technical field [0001] The invention relates to a preparation method of an iron composite oxide functional powder material, in particular to a method for preparing iron composite oxide (ferrite, ferrite) functional powder by continuous high-temperature hydrolysis-thermal metathesis-recrystallization of micro-droplets The process method of the material. The invention belongs to the technical field of wet oxide preparation. Background technique [0002] The traditional "wet method for preparing iron composite oxides (ferrite, ferrite)" is "chemical co-precipitation method" and "sol-gel method". The technical core of the "chemical co-precipitation method" is to add a precipitant at room temperature to adjust the pH value of the salt solution to hydrolyze and precipitate it, and then heat the precipitate precursor, that is, calcine it, and transform it into an iron composite oxide. The technical core of the "sol-gel method" is the integration of alloy components of oxides, whi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G53/04C01G49/02
Inventor 韩志范王德富
Owner CHONGQING ZHONGGONG NEW MATERIALS
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