The Practical Products Of Graphene Are Divided Into Two Categories

First, graphene material profile

Now the world is not a clear definition of graphene. 2004 British University of Manchester scientists Andrei Heim and Constantine Norfolkov found monolayer graphene. They were awarded the 2010 Nobel Prize in Physics for their excellent research work on graphene materials. Therefore, the initial graphene only refers to a single layer of carbon atoms from the single structure of the new material, is only one carbon atom thickness of the two-dimensional material. However, follow-up studies show that, from the electrical nature of the two and three, and even ten layers of carbon atoms also have their own special physical properties, the current thickness of 10 layers of carbon atoms within the sheet of graphite material is defined as graphene The argument is gradually recognized by academics. The recently established China Metalsene Union Standardization Committee found that the thickness of 10 layers of carbon atoms in the material belongs to the graphene range.

Graphene is a magical material, as long as the addition of a little into other materials may have a magical effect, worthy of the material sector "super material." Graphene not only "thinnest, strongest", as a thermal conductor, it is better than any other material's thermal effect. Using graphene, scientists can develop a range of new materials with special properties. Because of its very low resistivity, electron migration is extremely fast, it is expected to be used to develop thinner, faster conductive chips, replacing silicon. Since graphene is essentially a transparent, good conductor, it is also suitable for making transparent touch screens, light plates, and even solar cells. Super capacitors and chips, is the world's focus on the study of graphene field, but also the future of the culmination of the revolutionary progress of graphene. The application of graphene must be a process that extends from the low end to the high end. The use of low-end applications of conductivity of graphene will rise in the past two to three years, and the use of photovoltaic cells and replace the silicon chip chip area, still takes a long time. "

Second, made of graphene

The practical products of graphene are divided into two categories: graphene film and graphene powder. There are many ways to prepare graphene in the laboratory (see figure below). However, the way of mass production of graphene is mainly two kinds: one is the use of chemical vapor deposition in the metal surface to grow a single layer rate is very high, large area of graphene film material; one is the natural graphite through physical or chemical The method of crushing, the formation of graphene powder. The graphene powder looks like a very fine black powder. Domestic graphene powder and graphene film has been equipped with mass production capacity, is expected to a series of industrial applications of graphene will be large-scale roll out. As a high-tech material, graphene powder production process, research and development, technology and equipment are very important, the production of labor costs are very small. The annual production capacity of 50 tons of graphene powder business, the production process only a few workers only.