Nanotechnology is developing a newcross-cutting, cutting-edge disciplines in the eighties of the twentieth century. Nanotechnology in the twenty-first century technology is one of the three most important are the forefront of one of the topics. Preparation of nano-powder of which is an important research nanotechnology one. Prepared by evaporation condensation nanopowder is a physical method earlier in this paper was prepared by arc, but also belong to a kind of evaporation condensation method.
This article introduces the basic knowledge of nanotechnology and its development and application prospects. Arc and then designed a nano-powders prepared by heating of the experimental apparatus. The working principle of the device is in a certain atmosphere of pressure of inert or reactive atmosphere, such materials as metal arc electrodes, so that at a high temperature arc plasma melting under the role of evaporation. Encountered in the surrounding gas steam will be cooled or the formation of ultrafine reaction. The system total heating system, vacuum system, to generate room, the collection consists of several rooms. First of all, for the production of nanoparticles designed to generate conditions of rooms and vacuum system. Preparation of arc and then use to generate nano-steam heating. Cold trap using liquid nitrogen to achieve a constant input of rapid cooling, so that rapid nucleation of steam to ensure that the nanometer scale. Finally, through the use of glove-box structure of the collection device to achieve a vacuum packed powder chamber to avoid oxidation. The realization of the entire system is easy to process, prepare to meet the experimental needs of nanoparticles.
