First of all, graphene is the material with the highest thermal conductivity so far, and its thermal conductivity is very good. Secondly, the carrier (conducting ion) of graphene at room temperature is 15000cm/(v. s), which is more than ten times that of silicon and more than twice that of indium antimonide (InSb), and InSb is the known substance with the highest carrier mobility.
Graphene heating film, like conventional heating film, needs to be electrified. When the electrodes at both ends of the graphene heating film are electrified, the carbon molecules in the film generate phonons, ions and electrons in the resistor, and the generated carbon molecules collide with each other (also called Brownian motion) to generate heat energy. By controlling the far infrared ray with the wavelength between 5 and 14 micron, the heat is uniformly radiated in a planar manner.
The total effective electric heating energy conversion rate exceeds 99%, and the superconductivity of special graphene material ensures stable heating performance. However, unlike the traditional silk heating film, it is stable and safe, and the infrared rays emitted are called "the light of life".
The role of graphene:
The discovery of graphene, as well as many excellent properties discovered later, has brought new hope to a wide range of industrial fields: fast rechargeable batteries, super energy storage capacitors, anti-corrosion coatings, industrial catalysts, electronic components and other industries.
Many leading companies in graphene research have greatly improved the performance of traditional products through the research on graphene materials, thus establishing higher technical barriers for the industry and promoting industrial upgrading.
Globally, graphene is still in the research and development stage, and countries are still in the patent layout stage for this emerging material. The trend of industrialization has not yet appeared, and the whole industrial chain has not yet formed.
However, the competition in the field of graphene has been fierce, and no one wants to seize the opportunity and occupy the commanding heights of the industry as soon as possible. At present, graphene is widely used in seawater filtration, anti-corrosion coatings, energy storage batteries, graphene heating films and other fields.
Graphene heating film is closer to our life and is often used for physical therapy protection, mural heating, home heating and so on. The following small series will introduce the heating principle of graphene heating film for everyone, which is closely related to our lives.