Production of ultradispersed nano powders with electric explosion method

Introduction
Matter in form of powders is widely used at home and in industry. Usually we deal with the powders with a size of particles – from tens to hundreds micrometers. Even the powders used in powder metallurgy have the size of particles more than 10 micrometers.
It is known that when decreasing the size of particles, the properties of powders change, but chemical activity increases, coagulation temperature falls, some new properties, not typical for the materials in massive (roughly dispersed) state appear. During the last years such new fields of science as claster chemistry (the size of particles < 5nm), physical chemistry of ultradispersed mediums (the size of structural fragments < 100 nm) and nano material technology have intensely started to develop. The interest to these applications is connected with a search of possibilities to create more powerful chemical sources of energy, new construction materials, equipment and technological processes allowing to provide a principal breakthrough in technology and equipment.
Analysis of literature concerning the properties of the nano powders (UDP) shows that some of their characteristics are connected only with a small size of nano particles, other properties are caused by structure-energy characteristics. Changes in fundamental properties of traditional materials in the ultradispersed state (the decrease of the thaw point temperature, evaporation heat, ionization energy, photoelectric work function of electrons etc.) open large possibilities in the sphere of creation of completely new materials and technologies, devices and equipment.
Achievements of the last 10-15 years in the production of ceramic materials have radically changed the situation with the input powders. Now all the synthetic and chemically purified materials for the production of ceramics are initially the highly dispersed or even ultradispersed nano powders. Attempts made by technologists to get more and more fine powders have lead to the situation when more complicated technologies that were considered too expensive and hence not prospective before, began to replace traditional methods.
The elaboration of the new technologies of production of different nanopowders (UDPs), studies of nano properties and research of effective spheres of nano application nowadays have become one of the most important trends of science and technology development.
1. Nano (UDP) production technology
1.1. Wire electric explosion
1.2. Calculation and selection of explosion parameters
2. Nano particles (UDP) properties
3. The usage of nano powders (UDP)
3.1 Combustion of Aluminum nano powder in nitrogen (aluminum nitride synthesis)
3.2 Production of ultradispersed nano powder of molybdenum disulfide (MoS2).
3.3 Production of hot hydrogen with the aluminum nano powder (UDP)
3.4 Combustion of the aluminum nano powder (UDP) in the mixtures with various oxidants
3.4.1. Reaction of the aluminum nano powder (UDP) with oxides of metals.
3.4.2. Aluminum nano powder (UDP) reaction with percholates and nitrates.
3.5 The prospective of nano powder UDP use for the production of magnetic materials
3.6. Interaction of Aluminum nano powder (UDP) with water
Conclusion

Please find full text, soon at www.neoecosys.com

Protected by copyright, not allowed to be copied without permission
Neo-Eco Systems & Software Pvt. Ltd..

Views: 11

Welcome - about us

Welcome! Nanopaprika was cooked up by Hungarian chemistry PhD student in 2007. The main idea was to create something more personal than the other nano networks already on the Internet. Community is open to everyone from post-doctorial researchers and professors to students everywhere.

There is only one important assumption: you have to be interested in nano!

Nanopaprika is always looking for new partners, if you have any idea, contact me at editor@nanopaprika.eu

Dr. András Paszternák, founder of Nanopaprika

Publications by A. Paszternák:

Smartphone-Based Extension of the Curcumin/Cellophane pH Sensing Method

Pd/Ni Synergestic Activity for Hydrogen Oxidation Reaction in Alkaline Conditions

The potential use of cellophane test strips for the quick determination of food colours

pH and CO2 Sensing by Curcumin-Coloured Cellophane Test Strip

Polymeric Honeycombs Decorated by Nickel Nanoparticles

Directed Deposition of Nickel Nanoparticles Using Self-Assembled Organic Template,

Organometallic deposition of ultrasmooth nanoscale Ni film,

Zigzag-shaped nickel nanowires via organometallic template-free route

Surface analytical characterization of passive iron surface modified by alkyl-phosphonic acid layers

Atomic Force Microscopy Studies of Alkyl-Phosphonate SAMs on Mica

Amorphous iron formation due to low energy heavy ion implantation in evaporated 57Fe thin films

Surface modification of passive iron by alkylphosphonic acid layers

Formation and structure of alkylphosphonic acid layers on passive iron

Structure of the nonionic surfactant triethoxy monooctylether C8E3 adsorbed at the free water surface, as seen from surface tension measurements and Monte Carlo simulations

Next partner events of TINC

We are Media Partner of: