Recently, the research team of Dr. Kim kyong-tae from the powder/ceramic research headquarters of Korea institute of materials has successfully developed a very fine surface treatment technology of aluminum powder in South Korea, which can more than double the reactivity of oxygen compared with the existing aluminum powder materials and ensure the stability of operation.
The technology to remove the aluminum powder and existence of oxide film surface, at the end of the thermodynamic stability of fluorine-containing organic compounds on Shanghai juji, compared with the natural formation of the oxide film, organic coating under the low temperature heat can also be easily removed, as a solid fuel, produced in high energy condition, at the end of the aluminum powder can have higher oxidation reactivity, in addition, the organic coating can be made at the end of the aluminum powder to avoid direct contact with the external oxygen, compared with aluminum, are more likely to safe storage in normal temperature atmospheric environment.
When pure aluminum is combined with oxygen, compared with other materials, the oxidation reaction speed block also generates high heat. The United States, Russia and other countries use aluminum powder as rocket propellant, gunpowder, welding materials with the help of the violent oxidation reaction, widely used in aviation, civil and defense industry. Solid oxide film only when the surface completely eliminated, at the end of the aluminum powder, such as oxidation reactivity and conductivity performance can be fully played out, and this need at least 1000 ℃ heat. In addition, in the process of removing the oxide film, pure aluminum is directly exposed to the atmosphere and is also likely to explode, which is another headache for aluminum powder researchers.
To solve these problems, the materials research institute team attempted to easily remove the oxide film formed on the surface, using organics containing fluoride, which can improve the stability and reactivity of aluminum powder itself. Coating after the end of the aluminum powder on the temperature under 250 ℃ can remove organic coating, and contains the oxide film, the same size compared to the end of the aluminum powder can improve the response speed at least 2 times, it is worth mentioning that the use of the existing coating technology, easy to build relevant equipment, realize batch production.
In the future, this technology will help improve the oxidation reactivity of aluminum powder, which can be used as solid fuel material for artificial satellite launch rocket and raw material for brazing. Combined with organic bonding and blending technology, it can be used as a variety of electronic components including photovoltaic cells and highly conductive metal flux material, which is expected to increase the added value of aluminum powder, replacing imported powder material.
Kim kyong-tae, head of the research team, said that if the technology is commercialized, aluminum powder can create great value in the field of national defense and electronic parts, which will play a great role in the development of materials and technology in South Korea.
On the other hand, the research was supported by Multiscale Energetics research team, Meta materials research center and materials research institute from the basic technology development department of civilian military technical cooperation with the Korean research consortium.