High purity graphite products are widely used in metallurgy, machinery, electronics, chemical, electrical, food and other industrial fields. Such as emission electron tube, thyratron, mercury arc rectifier with graphite plate, a grid plate; semiconductor technology with graphite boat dish, the crucible, heating element, single crystal furnace heater; metal gasification with graphite ware, continuous casting mold, pressure sintering graphite template, electric spark machining of the graphite electrode.
Technology characteristics of high purity graphite:
1.Using high quality low ash raw materials, after high temperature graphite and ash removal treatment of pure graphite, the production standard of HISTEP 2750-2006 JB/T. The carbon content is between 99%99.95%.
2.High temperature resistant: graphite is one of the most high temperature resistant materials known. Its melting point is 3850 degrees C + 50 C, the boiling point of 4250. It is 10S at 7000 C ultra high temperature arc, the loss of graphite is the smallest, according to weight loss of graphite 0.8%. It can be seen that the high temperature resistance of graphite is very prominent.
3.Special thermal shock resistance, thermal shock resistance of Ishi Sumiku good, namely when the sudden temperature changes, the thermal expansion coefficient is small, and has good thermal stability, in the sharp temperature quench heat change, no crack.
Thermal conductivity and electrical conductivity: graphite has good thermal conductivity and electrical conductivity. Compared with the general materials, the thermal conductivity of the material is very high. 4 times higher than that of stainless steel, 2 times higher than carbon steel, non metal than the average 100 times higher.
4.Lubrication: graphite lubrication performance similar to molybdenum disulfide, friction coefficient is less than 0.1. Their lubrication properties vary with the scale size, larger scale, friction coefficient heals small, lubrication, the better.
Chemical stability: room temperature graphite has good chemical stability, acid resistance, alkali resistance, corrosion resistance to organic solvents.