2015年8月24日星期一

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



Maybe you have seen 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 special nature. Isostatic Graphite is really a great instance. In other words, graphite has special structure as a result it has its special function.
Firstly,graphite is with higher temperature resistance. Generally speaking, graphite‘s melting point can be up to 3 thousand, nine hundred degrees. Simultaneously, its boiling point can be up to four thousand, two hundred and twenty five degrees. Even the ultra high temperature arc ignition, weight reduction of graphite is still extremely little. What‘s much more, its coefficient of thermal expansion can also be very 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 can be doubled.
Secondly, graphite is with the feature of conductivity. To be particular, graphite is with one hundred times greater conductivity than that of common nonmetal ore. As a matter of reality, it‘s thermal conductivity may be more than that of steel, iron, lead and other metal materials. But around 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 3 covalent bonds with other carbon atoms. What‘s much more, every carbon atom nonetheless retains one free electrons to charge.
Thirdly, grahite is with great lubrication. To be specific, its lubrication overall performance depends upon the size of graphite flake. In other words, the larger the flake or Graphite Block is, the smaller sized the friction coefficient will probably be, and the better the lubrication overall performance will be.
Fourthly, graphite is with good chemical stability. Graphite has great chemical stability at room temperature. Consequently, it's with acid, alkali and corrosion resistance to organic solvents.
Now, let us discuss one application of graphite.
Graphite may be used as put on resistant lubricating material. Generally speaking, graphite, within the mechanical industry, is frequently utilized as lubricant. As all of us know, the lubricating oil can not be used in the condition of high speed, higher temperature and high stress. But in contrast, graphite‘s wear-resistant material can be utilized within the temperature of two hundred to two thousand degrees and with out 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 have to add lubricant.

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