Preparation method of spinel type nano nickel ferrite powder

A nano-nickel ferrite and spinel-type technology, applied in the direction of nanotechnology, chemical instruments and methods, nickel compounds, etc., can solve the problems of unspecified preparation conditions, unfavorable kilogram-level experiments, complex reaction process, etc., to achieve The effect of uniform size, low cost and simple preparation process

Inactive Publication Date: 2017-03-22
GUIZHOU BRANCH CHINA ALUMINUM IND
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  • Claims
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Problems solved by technology

[0005] At present, there is no information on the preparation of nano-NiFe by hydrothermal method 2 o 4 The published patents of the powder aspect, the preparation conditions are not clearly given in the published documents and books. In the published documents abroad, it is reported that (NH 4 ) 2 S 2 o 8 As surfactant, take NH 3 h 2 O is a precipitant, hydrothermal synthesis of NiFe 2 o 4 Nano powder, but the reaction process is complex and the reaction time is relatively long, which is not conducive to the later kilogram-level experiment, and it is difficult to expand the production of chemical industry

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  • Preparation method of spinel type nano nickel ferrite powder
  • Preparation method of spinel type nano nickel ferrite powder

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[0022] A preparation method of spinel-type nano-nickel ferrite powder, dissolving iron sulfate and nickel sulfate in deionized water according to a certain molar concentration ratio, stirring vigorously, and adding alkali through a peristaltic pump after the solution is completely dissolved and mixed uniformly Solution, make the mixed solution react completely, and add dispersant; Stir the mixed solution continuously to precipitate the solution, then centrifuge the completely precipitated mixed solution, and stir the precipitate with pure water to make it uniform; The obtained precursor is loaded into a high-pressure reactor, and a temperature-time curve is set for a hydrothermal reaction; after the reaction is completely cooled to room temperature, the product is washed, dried, and ground.

[0023] A kind of preparation method of spinel type nano-nickel ferrite powder of the present invention, its step (1) ferric sulfate, nickel sulfate are according to the ratio that the mola...

Embodiment 1

[0026] Weigh ferric sulfate and nickel sulfate according to the ratio of Ni:Fe=0.5, dissolve them in deionized water, stir evenly, add 1mol / L sodium hydroxide solution evenly and quickly with a peristaltic pump, stir vigorously, and react for one hour to make them Complete precipitation, wash the precipitate with pure water until PH = 10, then transfer to the reaction kettle, heat up to 200°C for 80 minutes, keep it warm for 2 hours, and after the reaction, suction filter, wash and dry to obtain NiFe 2 o 4 pink.

Embodiment 2

[0028] Weigh iron sulfate and nickel sulfate according to the ratio of Ni:Fe=0.6, dissolve them in deionized water, stir evenly, and add 2mol / L sodium hydroxide solution evenly and quickly with a peristaltic pump, and add polyethylene glycol as a dispersant, Vigorously stir and react for one hour to make it completely precipitate, wash the precipitate with pure water until PH = 14, then transfer to the reaction kettle, heat up to 220°C for 90 minutes, keep warm for 4 hours, suction filter, wash and dry after reaction, Get NiFe 2 o 4 pink.

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Abstract

The invention provides a preparation method of spinel type nano nickel ferrite powder and relates to a method for preparing the spinel type nano NiFe2O4 powder through the hydrothermal method. The preparation method is characterized by comprising the following steps that (1) ferric sulfate and nickel sulfate are weighed according to proportion, dissolved with deionized water and stirred evenly; (2) a ferric sulfate and nickel sulfate solution obtained in the step (1) is added into alkali liquor dropwise till the reaction is completed and sediment is generated; (3) the sediment generated in the reaction in the step (2) is washed with pure water, and a precursor solution is obtained; (4) the precursor solution obtained in the step (3) is transferred into a reaction still for a hydrothermal reaction; and (5) after the hydrothermal reaction in the step (4) is completed, suction filtering, washing and drying are conducted, and the spinel type nano NiFe2O4 powder is obtained. According to the method, the prepared nickel ferrite ceramic material is good in dispersity and uniform in size, and the primary average particle size is 60 nm; and in addition, the preparation technique is simple, the period is short, the cost is low, and the preparation method is suitable for batch production.

Description

technical field [0001] A method for preparing spinel-type nano-nickel ferrite powder, involving a hydrothermal method for preparing spinel-type nano-NiFe 2 o 4 powder method. Background technique [0002] Spinel ferrite is a class of magnetic materials with a wide range of uses. Magnetic nanoparticles are widely used in the fields of biomedicine, magnetic storage and catalysts. When the particle size reaches the nanometer level, the magnetic particles will have some unique physical, chemical and structural properties. Nickel ferrite belongs to the inverted spinel structure. Due to its structure, nickel ferrite has higher saturation magnetization, high initial permeability, low coercive force and low conductance than other ferrites such as cobalt ferrite. Therefore, the preparation of nickel ferrite has attracted much attention. Nano-nickel ferrite is mainly used in the fields of ceramics and magnetic materials. [0003] So far, researchers at home and abroad have synthe...

Claims

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Application Information

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IPC IPC(8): C01G53/00B82Y40/00
CPCC01G53/00C01P2002/72C01P2004/03C01P2004/64
Inventor张岩岩颜恒维刘永鹤李东红贾春燕康乐
OwnerGUIZHOU BRANCH CHINA ALUMINUM IND