2015年8月24日星期一

Why Is Graphite So Unique And Practical In Our Daily Life?



Perhaps you've seen Isostatic Graphite or Artificial Graphite. You believe each of them are unique and incredible. Then let us know much more about graphite.
As some of us know, graphite is with its unique nature. Isostatic Graphite is really a great instance. In other words, graphite has unique structure consequently it has its special function.
Firstly,graphite is with higher temperature resistance. Usually speaking, graphite‘s melting point may be up to three 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 is still very small. What‘s much more, its coefficient of thermal expansion can also be extremely little. In contrast, the graphite strength increases with the increasing temperature. By the way, when the temperature of graphite is two thousand, the graphite intensity may be doubled.
Secondly, graphite is with the function of conductivity. To be particular, graphite is with 1 hundred times greater conductivity than that of common nonmetal ore. As a matter of fact, it‘s thermal conductivity may be over 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 can be as insulator. Graphite can conduct electricity because every carbon atom in graphite types three covalent bonds with other carbon atoms. What‘s more, each carbon atom nonetheless retains one totally free electrons to charge.
Thirdly, grahite is with good lubrication. To be specific, its lubrication performance depends on 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 the better the lubrication performance will be.
Fourthly, graphite is with good chemical stability. Graphite has good chemical stability at space temperature. Consequently, it's with acid, alkali and corrosion resistance to organic solvents.
Now, let us talk about 1 application of graphite.
Graphite can be used as put on resistant lubricating material. Generally speaking, graphite, in the mechanical industry, is often utilized as lubricant. As all of us know, the lubricating oil can not be used in the condition of higher speed, higher temperature and high pressure. But in contrast, graphite‘s wear-resistant material can be used in the temperature of two hundred to two thousand degrees and without lubricating oil.
As for many devices that transport the corrosive medium, Graphite Heater is extensively utilized 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