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Method for preparing gamma-Fe2O3 nano particle powder

A nanoparticle and powder technology, which is applied in the field of preparation of γ-Fe2O3 nanoparticle powder, can solve problems such as unstable performance, low magnetism, and application limitations, and achieve high product quality, good dispersion, and stable chemical properties. Effect

Inactive Publication Date: 2013-02-13
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The most widely used iron oxide is Fe 3 o 4 , γ-Fe 2 o 3 and α-Fe 2 o 3 , where γ-Fe 2 o 3 and Fe 3 o 4 It is magnetic and is often used as a magnetic raw material. However, due to the influence of low magnetic properties and unstable properties of iron oxide prepared by traditional methods, its application is greatly restricted, and it is generally used for low-end products.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] (1) Grind 11.65g of ferric acetate at 300°C for 6 hours, then place it in a constant temperature oil bath at 80°C under stirring conditions, and add it to ethylene glycol according to the molar ratio of ferric acetate to ethylene glycol as 2:1 In diol solution, obtain suspension;

[0018] (2) Prepare a sodium carbonate solution with a concentration of 0.1mol / L, and add it dropwise to the suspension obtained in step (1) at a volume ratio of 1:1 under stirring conditions, and continue stirring and aging for 2 hours after the addition is completed;

[0019] (3) Let the solution obtained in step (2) stand to cool to room temperature, then perform suction filtration, and exchange and wash with deionized water and ethanol;

[0020] (4) Place the filter cake obtained in step (3) in a constant temperature drying oven at 110°C for constant temperature drying for 10 hours to obtain the prepared product γ-Fe 2 o 3 Nanoparticle powder.

Embodiment 2

[0022] (1) Grind 11.65g of ferric acetate at 500°C for 4 hours, then place it in a constant temperature oil bath at 120°C under stirring conditions, and add it to ethyl alcohol according to the molar ratio of ferric acetate to ethylene glycol as 3:1. In diol solution, obtain suspension;

[0023] (2) Prepare a sodium carbonate solution with a concentration of 0.4mol / L, and add it dropwise to the suspension obtained in step (1) at a volume ratio of 1:1 under stirring conditions, and continue to stir and age for 2 hours after the addition is completed;

[0024] (3) Let the solution obtained in step (2) stand to cool to room temperature, then perform suction filtration, and exchange and wash with deionized water and ethanol;

[0025] (4) Place the filter cake obtained in step (3) in a constant temperature drying oven for 104 hours at 1104°C to obtain the prepared product γ-Fe 2 o 3 Nanoparticle powder.

Embodiment 3

[0027] (1) Grind 22.3g of ferric acetate at 600°C for 3 hours, then place it in a constant temperature oil bath at 140°C under stirring conditions, and add it to ethylene glycol according to the molar ratio of ferric acetate to ethylene glycol as 4:1 In diol solution, obtain suspension;

[0028] (2) Prepare a sodium carbonate solution with a concentration of 0.6mol / L, and add it dropwise to the suspension obtained in step (1) at a volume ratio of 1:1 under stirring conditions, and continue stirring and aging for 2 hours after the addition is completed;

[0029] (3) Let the solution obtained in step (2) stand to cool to room temperature, then perform suction filtration, and exchange and wash with deionized water and ethanol;

[0030] (4) Place the filter cake obtained in step (3) in a constant temperature drying oven for 24 hours at 115°C to obtain the prepared product γ-Fe 2 o 3 Nanoparticle powder.

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Abstract

The invention provides a method for preparing gamma-Fe2O3 nano particle powder. By means of the method, gamma-Fe2O3 nano particles are prepared with iron acetate as the iron source, ethanediol as the dispersing agent and sodium carbonate as the precipitator. The method includes: grinding the iron acetate, and adding the iron acetate into the ethanediol solution to obtain turbid liquid; adding the sodium carbonate solution into the turbid liquid dropwise, continuing stirring for ageing after the dropwise adding is finished, standing for cooling the solution to the room temperature, performing suction filtration, and washing through deionized water and ethanol alternatively; and drying the obtained filter cakes to obtain the prepared gamma-Fe2O3 nano particle powder. The obtained gamma-Fe2O3 nano particle powder is stable in chemical property and high in catalytic activity, has good light resistance, weather resistance and shielding resistance on ultraviolet and can be widely used in the aspects of fine ceramics, plastic products, coating, catalysts, magnetic materials, biomedical engineering and the like. The method for preparing gamma-Fe2O3 nano particle powder is short in technological process, good in operation environment, high in product quality, superfine and even in particle, good in dispersibility and the like.

Description

technical field [0001] The present invention relates to a kind of gamma-Fe 2 o 3 The invention relates to a method for preparing nano particle powder, which belongs to the technical field of nano materials. Background technique [0002] Iron oxide is an important inorganic non-metallic material, widely used as magnetic recording material, soft ferrite material, polishing agent and pigment. The range of application as pigments is very wide. The amount of iron oxide pigments used in the world exceeds 100t, second only to titanium dioxide, ranking second in inorganic pigments. The most widely used iron oxide is Fe 3 o 4 , γ-Fe 2 o 3 and α-Fe 2 o 3 , where γ-Fe 2 o 3 and Fe 3 o 4 It is magnetic and is often used as a magnetic raw material. However, due to the low magnetic properties and unstable performance of iron oxide prepared by traditional methods, its application is greatly limited, and it is generally used for low-end products. [0003] The emergence of nanot...

Claims

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Application Information

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IPC IPC(8): C01G49/06B82Y40/00B82Y30/00
Inventor 李孔斋刘自松王华魏永刚祝星杜云鹏杨丽
Owner KUNMING UNIV OF SCI & TECH
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