Preparation method of nickel ferrite spinel nano-powder

A technology of spinel and nanopowder, which is applied in the direction of nanotechnology, chemical instruments and methods, iron compounds, etc., can solve the problems of harsh conditions, difficult control, high cost, etc., and achieve easy operation and control, high selectivity, and less pollution Effect

Inactive Publication Date: 2012-06-27
NORTHEASTERN UNIV LIAONING
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

Due to the unique physical and chemical properties of nanomaterials, compared with bulk materials, their optical, electrical, magnetic, and thermal properties are quite different. Therefore, nanoscale NiFe has been studied in recent years. 2 o 4 The preparation technology and properties of spinel powder have been studied to a certain extent; currently the preparation of NiFe 2 o 4 The main methods of nano powder are sol-gel method, hydrothermal method, co-precipitation method, citrate precursor method, high-energy ball milling method, etc.; these methods have complex process, harsh conditions, high energy consumption, difficulty in control and relatively high cost. advanced defects

Method used

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

Examples

Experimental program
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Effect test

Embodiment 1

[0022] The inorganic iron salt used is FeSO 4 ·7H 2 O;

[0023] The inorganic nickel salt used is NiSO 4 ·6H 2 O;

[0024] Mix inorganic iron salt, inorganic nickel salt and NaOH and physically break it into powder, the mixing ratio is according to Fe 2+ 、Ni 2+ and OH - The molar ratio is 2:1:6;

[0025] Put the dispersant NaCl and the powder into the grinder for grinding. NaCl accounts for 20% of the total weight of the powder. When the ground material turns brown, dry the ground material at 100±5°C 6h, obtain the precursor of tan block;

[0026] The precursor was calcined at 800°C for 60 minutes, washed with water to remove impurities, and then dried to remove water to obtain nickel ferrite spinel nanopowder; the obtained product was detected by X-ray diffraction (XRD), and the results were as follows figure 1 As shown, the diffraction peaks are all characteristic peaks of nickel ferrite, and the average grain size calculated by the Debye-Scherrer formula is 28nm; t...

Embodiment 2

[0028] The inorganic iron salt used is FeCl 2 4H 2 O;

[0029] The inorganic nickel salt used is NiCl 2 ·6H 2 O;

[0030] Mix inorganic iron salt, inorganic nickel salt and NaOH and physically break it into powder, the mixing ratio is according to Fe 2+ 、Ni 2+ and OH - The molar ratio is 2:1:6;

[0031] Put the dispersant NaCl and the powder into the grinder for grinding. NaCl accounts for 21% of the total weight of the powder. When the ground material turns brown, dry the ground material at 100±5°C 7h, obtain the precursor of tan block;

[0032] The precursor was calcined at 700°C for 80 minutes, washed with water to remove impurities, and nickel ferrite spinel nanopowder was obtained; the obtained product was detected by X-ray diffraction (XRD), and the results were as follows image 3 As shown, the diffraction peaks are all characteristic peaks of nickel ferrite, and the average grain size calculated by the Debye-Scherrer formula is 41nm; the obtained product is de...

Embodiment 3

[0034] The inorganic iron salt used is FeSO 4 ·7H 2 O;

[0035] The inorganic nickel salt used is NiCO 3 3Ni(OH) 2 .4H 2 O;

[0036] Mix inorganic iron salt, inorganic nickel salt and NaOH and physically break it into powder, the mixing ratio is according to Fe 2+ 、Ni 2+ and OH - The molar ratio is 2:1:6;

[0037] Put the dispersant NaCl and the powder into the grinder for grinding. NaCl accounts for 22% of the total weight of the powder. When the ground material turns brown, dry the ground material at 100±5°C 8h, obtain the precursor of tan block;

[0038] The precursor was calcined at 750°C for 70 minutes, washed with water to remove impurities, and then dried to remove water to obtain nickel ferrite spinel nanopowder; the particle size was 20-40nm, with an average particle size of 35nm.

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Abstract

The invention relates to a preparation method of nickel ferrite spinel nano-powder, which belongs to the technical field of nano material synthesis, and comprises the following steps that: (1) inorganic ferric salt, inorganic nickel salt and sodium hydroxide (NaOH) are mixed and physically crushed into powder; (2) dispersing agent sodium chloride (NaCl)and the power are put into a grinding machine to be ground until all the materials turn into brown, the materials are dried, and brown precursor blocks are obtained; and (3) the precursors are calcinated, washed by water and then dried, and the nickel ferrite spinel nano-powder is obtained. The method has the characteristics of convenience in operation and control, no use of solvent, high-selectivity, high-yield, little pollution, energy saving, simple synthesis process and the like.

Description

technical field [0001] The invention belongs to the technical field of nanomaterial synthesis, and in particular relates to a preparation method of nickel ferrite spinel nanopowder. Background technique [0002] NiFe 2 o 4 It is a commonly used soft magnetic ferrite material. It is widely used in permanent magnets, magnetic recording, ferrofluid and microwave equipment. It can also be used as a catalyst for certain reactions and a gas sensor material. Nickel ferrite is a Ceramic materials have the advantages of high temperature resistance, corrosion resistance, high hardness, high strength, and good thermal stability. They are one of the key applications of inert anodes for aluminum electrolysis. Due to the unique physical and chemical properties of nanomaterials, compared with bulk materials, their optical, electrical, magnetic, and thermal properties are quite different. Therefore, in recent years, nanoscale NiFe 2 o 4 The preparation technology and properties of spine...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G49/00B82Y40/00
Inventor 刘宜汉姚广春张志刚
Owner NORTHEASTERN UNIV LIAONING
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