2015年8月23日星期日

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



Maybe you have seen Isostatic Graphite or Artificial Graphite. You think each of them are unique and incredible. Then let us know more about graphite.
As a few of us know, graphite is with its unique nature. Isostatic Graphite is really a good instance. In other words, graphite has unique structure consequently it has its unique feature.
Firstly,graphite is with higher temperature resistance. Usually speaking, graphite‘s melting point may be up to 3 thousand, nine hundred degrees. Simultaneously, its boiling point can be as much as 4 thousand, two hundred and twenty five degrees. Even the ultra high temperature arc ignition, weight loss of graphite is still extremely small. What‘s 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 be particular, graphite is with 1 hundred occasions greater conductivity than that of general nonmetal ore. As a matter of fact, it‘s thermal conductivity can be more than that of steel, iron, lead as well as other metal supplies. But on the other hand, its thermal conductivity decreases with the improve of temperature. Even in high temperature, graphite may be as insulator. Graphite can conduct electricity simply because each carbon atom in graphite types three covalent bonds with other carbon atoms. What‘s more, each carbon atom nonetheless retains 1 totally free electrons to charge.
Thirdly, grahite is with good lubrication. To become particular, its lubrication overall 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 much better the lubrication performance will be.
Fourthly, graphite is with great chemical stability. Graphite has great chemical stability at room temperature. Consequently, it is with acid, alkali and corrosion resistance to organic solvents.
Now, let us talk about one application of graphite.
Graphite may be used as wear resistant lubricating material. Generally speaking, graphite, within the mechanical business, is frequently utilized as lubricant. As all of us know, the lubricating oil can not be utilized within the condition of higher speed, higher temperature and high pressure. But in contrast, graphite‘s wear-resistant material can be utilized within 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 widely used for making piston cup, sealing ring and bearings. That's simply because when they run, there is no have to add lubricant.

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