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Unirersal technology for preparing nano-powder

A nano-powder, general-purpose technology, applied in grain processing, blasting, etc., can solve problems such as application limitations, and achieve the effect of small experimental scale, simple and fast process, and good powder quality

Inactive Publication Date: 2009-09-02
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

More importantly, most nanopowder preparation techniques are only suitable for the preparation of one or a few kinds of nanopowders, which limits their application.

Method used

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  • Unirersal technology for preparing nano-powder
  • Unirersal technology for preparing nano-powder
  • Unirersal technology for preparing nano-powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] 10g of metallic aluminum powder and 90g of TNT (with 5% nitrobenzene added) were uniformly mixed. Die-cast into a column at 20Gpa, put it into a closed cylindrical explosion tank filled with nitrogen, use an electric detonator to detonate, collect the explosion products after the explosion, filter out the impurities with a sieve, and calcinate the obtained solid at 700°C for 2 hour, can obtain 14g off-white nano-aluminum nitride powder without grinding, and the yield is 140%.

[0021] The particle size analysis results can be found in the appendix figure 1 , the average particle size is 45.5nm, and the particle size distribution is ±0.35nm;

[0022] TEM see attached figure 2 , the particles are cubic, with good dispersion and no obvious agglomeration;

[0023] The results of X-ray diffraction analysis are shown in the appendix image 3 , the diffraction angles 2θ of the main absorption peaks are 31.82°, 37.50°, 45.67°, 60.5°, 66.62°, which are completely consistent...

Embodiment 2

[0025] Mix 10g metal iron powder and 90g TNT / RDX (80 / 20) mixed explosive evenly, die-cast it into a concave table at 30Gpa, put it into a closed cylindrical explosion tank filled with water, use an electric detonator to detonate, and collect after explosion Explosion product, use a sieve to filter out impurities, centrifuge, and calcinate the obtained solid at 700°C for 2 hours to obtain 12 red nano-iron oxide powders without grinding, with a yield of 120% and a particle size of 40.3nm , X-ray diffraction analysis showed that it was pure α phase.

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Abstract

The invention provides a general technique for preparing nanometer powder, which belongs to the field of inorganic material preparation. It is characterized in that the preparation of various nanometer powders is realized by changing the types of explosives and reaction materials and the ratio of explosives and reaction materials; the explosive is not only a provider of energy, but also a participant of reaction materials. Compared with the traditional nano-powder preparation technology, this method not only can prepare a variety of nano-powders, but also belongs to a general technology; it also has many advantages such as low cost, simple and fast process, high yield, good quality of the obtained powder, and easy scale-up. Advantages, especially suitable for industrial production.

Description

technical field [0001] The invention relates to a general technique for preparing nanometer powder, which belongs to the field of inorganic material preparation. Background technique [0002] Due to the small size effect, surface and interface effect, and quantum size effect of nanopowder, its electrical, magnetic, thermal, optical, sensitive characteristics, and surface stability are significantly different from ordinary particles, and it has broad application prospects. Physics, chemistry, materials, biology, medicine, environment, textiles and many other fields have been widely used, especially in the field of materials. The emergence of nano-ceramics has solved one of the biggest weaknesses of ceramic materials, namely brittleness, and the synthesis of nano-powders is The first step in the preparation of nano-ceramics, because the properties of the powder such as purity, composition distribution, particle size, particle size distribution, agglomeration state, etc. have a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F42D3/00B02C19/18
Inventor 郑敏
Owner SUZHOU UNIV
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