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Rapid preparation method of nano alpha-iron oxide powder

A technology of iron oxide powder and nanometer, which is applied in the field of preparation of iron oxide powder, which can solve the problems of long time, poor dispersion, serious agglomeration of sol-gel method, etc.

Inactive Publication Date: 2014-05-21
HUBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the hydrothermal method takes a long time to prepare, and the equipment investment is large; the precipitation method is difficult to wash and filter, and it is easy to introduce impurities to affect the purity of the product; the sol-gel method has serious agglomeration and poor dispersion.

Method used

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  • Rapid preparation method of nano alpha-iron oxide powder
  • Rapid preparation method of nano alpha-iron oxide powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Take 4.0 g (about 0.01 mol) of ferric nitrate nonahydrate and 3.5 g (about 0.02 mol) of ascorbic acid at room temperature, add 30 ml (about 1.67 mol) of deionized water, stir and dissolve, evaporate in a water bath at 80 ° C for 3 hours to obtain paste. The paste is dried at 105°C and calcined in a kiln at 500°C for 3 hours to obtain a particle size of 50nm ~ 100nm nano iron oxide powder. The XRD pattern of gained powder is as figure 1 shown. From figure 1 It can be seen that all the characteristic peak positions are consistent with the standard powder diffraction card ( α -Fe 2 o 3 PDF 33-0664) have the same diffraction peaks, and it can be determined that the obtained powder is α -Fe 2 o 3 . The SEM photograph of the obtained powder is as figure 2 As shown, the figure shows that the morphology of the obtained powder is regular, and the particle size is 50nm ~ 100nm.

Embodiment 2

[0020] Take 4.0 g (about 0.01 mol) of ferric nitrate nonahydrate and 7.0 (about 0.04 mol) of ascorbic acid at room temperature, add 30 ml (about 167 mol) of deionized water, stir and dissolve, evaporate in a water bath at 80°C for 3 hours to obtain a paste shape. The paste was dried at 110°C and calcined in a kiln at 400°C for 4 hours to obtain a particle size of 50nm ~ 100nm nano α - Iron oxide powder.

Embodiment 3

[0022] Take 4.0 g (about 0.01 mol) of ferric nitrate nonahydrate and 10.0 g (about 0.057 mol) of ascorbic acid at room temperature, add 30 ml (about 1.67 mol) of deionized water, stir and dissolve, evaporate in a water bath at 80 ° C for 3 hours to obtain paste. The paste is dried at 105°C and then calcined in a kiln at 300°C for 4 hours to obtain nano-α-iron oxide powder with a particle size of 50nm~100nm.

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Abstract

The invention discloses a rapid preparation method of nano alpha-iron oxide powder, characterized by using ferric nitrate, ascorbic acid and water as raw materials, uniformly mixing with stirring, evaporating the mixture into pasty in 80 DEG C water bath, drying at 105-120 DEG C, calcining for 200-700 DEG C to obtain the nano alpha-iron oxide powder. The method has the advantages of short preparation period and simple technology, and the prepared iron oxide particles have high purity.

Description

technical field [0001] The invention relates to a preparation method of iron oxide powder, in particular to a rapid preparation method of nano-α-iron oxide powder. Background technique [0002] Iron oxide is non-toxic and tasteless, and has some excellent properties, such as acid resistance, alkali resistance, heat resistance, corrosion resistance, good magnetism, etc., and is widely used in catalysis, gas sensors, functional ceramics, magnetic materials, rubber, Pigments and biomedicine and other fields. [0003] The preparation methods of nano iron oxide powder include traditional hydrothermal method, precipitation method, sol-gel method and so on. Among them, the hydrothermal method takes a long time to prepare, and the equipment investment is large; the precipitation method is difficult to wash and filter, and it is easy to introduce impurities to affect the purity of the product; the sol-gel method has serious agglomeration and poor dispersion. Such as: CN1817801A di...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G49/06B82Y40/00
Inventor 周国华王春燕张春燕刘红
Owner HUBEI UNIV OF TECH