2015年8月19日星期三

Why Is Graphite So Special And Practical 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 much more about graphite.
As some of us know, graphite is with its unique nature. Isostatic Graphite is really a good instance. In other words, graphite has special structure consequently it has its unique function.
Firstly,graphite is with high temperature resistance. Generally speaking, graphite‘s melting point can be as much as 3 thousand, nine hundred degrees. Simultaneously, its boiling point can be as much as four thousand, two hundred and twenty five degrees. Even the ultra higher temperature arc ignition, weight reduction of graphite continues to be very small. What‘s much more, its coefficient of thermal expansion can also be extremely small. 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 specific, graphite is with 1 hundred occasions higher 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 electrical energy simply because every carbon atom in graphite forms three 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 on the size of graphite flake. In other words, the larger 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 great chemical stability at space temperature. As a result, 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 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 high stress. But in contrast, graphite‘s wear-resistant material can be utilized 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 making piston cup, sealing ring and bearings. That's because once they run, there is no need to add lubricant.

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