What is electrical carbon?
The main component of electrical carbon material is carbon. Because of the different structures, carbon has two types: crystalline carbon and amorphous carbon. Crystalline carbon is mainly composed of graphite, amorphous carbon, mainly coke, charcoal, carbon black and so on. Coal used daily is an impure amorphous carbon.Graphite has a crystalline structure of six square system. It has numerous parallel layers superimposed on each layer of carbon atoms at the top angles of the six angles plane, forming an ordered arrangement of three-dimensional space. Because the distance between the layers of the graphite crystal is much larger than the distance between the carbon atoms on the surface, the graphite has an obvious anisotropy. When there is external force, the surface of graphite is easy to slip, so it shows self lubrication characteristics. In high purity graphite crystals, the valence band overlaps the conduction band, so the high conductivity of the metalloid is demonstratedThe arrangement of carbon atoms in amorphous carbon is haphazard, and it is easier to slip than the graphite layer, and its hardness is 4~5 times higher than that of graphite. Amorphous carbon, if treated at 2 200~2 5000C high temperature, can transform the disordered structure into an ordered arrangement of two-dimensional space.
Different uses have different varieties, according to the use of electric carbon varieties can be divided into:(1) sliding contact carbon brushes and carbon sliders for all kinds of motor brushes.(2) various carbon and graphite contacts used in high power switches, relays, etc..(3) with various carbon arc lighting, carbon arc gouging, spectral analysis and arc furnace.(4) all kinds of high purity graphite electrodes, insulation and supporting elements for electric vacuum devices.(5) various electrodes used in dry cells and electrolytic cells.(6) the resistance effect of carbon. Made of various resistance, post, communication with the microphone carbon sand, resistance heating elements etc..
Carbon and graphite have the following characteristics:(1) it has good conductivity and thermal conductivity.2. It has excellent properties of high temperature resistance, can work at 3000 degrees under anaerobic condition, and has good mechanical strength and thermal shock resistance at high temperature.(3) good chemical stability, not adhesion to liquid metal at high temperature, only with strong oxidant.(4) graphite has good self lubrication characteristics.The electricity production process is as follows: firstly, the carbon powder and adhesive agent he mixed pressed carbon matrix material. And then send the person inside the furnace and high temperature sintering, the final form of electrical carbon products.
