2015年8月20日星期四

Why Is Graphite So Unique And Sensible In Our Every day Life?



Maybe you have noticed Isostatic Graphite or Artificial Graphite. You think both of them are unique and incredible. Then let us know more about graphite.
As some of us know, graphite is with its unique nature. Isostatic Graphite is a great example. In other words, graphite has unique structure as a result it has its special function.
Firstly,graphite is with high temperature resistance. Generally speaking, graphite‘s melting point can be up to 3 thousand, nine hundred degrees. At the same time, its boiling point can be up to 4 thousand, two hundred and twenty 5 degrees. Even the ultra high temperature arc ignition, weight reduction of graphite continues to be extremely small. What‘s much more, its coefficient of thermal expansion is also very small. In contrast, the graphite strength increases using the increasing temperature. By the way, when the temperature of graphite is two thousand, the graphite intensity can be doubled.
Secondly, graphite is using the function of conductivity. To become specific, graphite is with 1 hundred occasions greater conductivity than that of general nonmetal ore. As a matter of reality, it‘s thermal conductivity can be more than that of steel, iron, lead as well as other metal supplies. But around the other hand, its thermal conductivity decreases using the increase of temperature. Even in high temperature, graphite may be as insulator. Graphite can conduct electrical energy because every carbon atom in graphite forms three covalent bonds with other carbon atoms. What‘s more, each carbon atom still retains one free electrons to charge.
Thirdly, grahite is with great lubrication. To be particular, its lubrication overall performance depends upon the size of graphite flake. In other words, the bigger the flake or Graphite Block is, the smaller sized the friction coefficient will be, and also the better the lubrication performance will be.
Fourthly, graphite is with great chemical stability. Graphite has good chemical stability at room temperature. As a result, it is with acid, alkali and corrosion resistance to organic solvents.
Now, let us discuss 1 application of graphite.
Graphite can be utilized as wear resistant lubricating material. Usually speaking, graphite, in the mechanical business, is frequently used as lubricant. As all of us know, the lubricating oil can not be utilized in the condition of higher speed, higher temperature and higher pressure. But in contrast, graphite‘s wear-resistant material may be used in the temperature of two hundred to two thousand degrees and without lubricating oil.
As for a lot of devices that transport the corrosive medium, Graphite Heater is widely used for creating piston cup, sealing ring and bearings. That is because once they run, there's no need to add lubricant.

没有评论:

发表评论