2015年8月19日星期三

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



Perhaps you have seen Isostatic Graphite or Artificial Graphite. You believe each 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 good example. In other words, graphite has unique structure as a result it has its special feature.
Firstly,graphite is with high temperature resistance. Generally speaking, graphite‘s melting point can be up to 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 high temperature arc ignition, weight loss of graphite continues to be very little. What‘s more, its coefficient of thermal expansion is also very small. In contrast, the graphite strength increases using the growing 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 one hundred times higher conductivity than that of common nonmetal ore. As a matter of fact, it‘s thermal conductivity may be more than that of steel, iron, lead as well as other metal supplies. But around the other hand, its thermal conductivity decreases with the increase of temperature. Even in higher temperature, graphite may be as insulator. Graphite can conduct electricity because each carbon atom in graphite forms 3 covalent bonds with other carbon atoms. What‘s more, every carbon atom nonetheless retains 1 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 larger the flake or Graphite Block is, the smaller sized the friction coefficient will probably be, and also the better the lubrication performance will probably be.
Fourthly, graphite is with great chemical stability. Graphite has great chemical stability at space temperature. Consequently, it is with acid, alkali and corrosion resistance to organic solvents.
Now, let us talk about one application of graphite.
Graphite can be utilized as put on resistant lubricating material. Generally speaking, graphite, in the mechanical business, is often utilized as lubricant. As all of us know, the lubricating oil can not be used in the condition of high speed, high temperature and higher pressure. But in contrast, graphite‘s wear-resistant material can be utilized in the temperature of two hundred to two thousand degrees and with out lubricating oil.
As for many devices that transport the corrosive medium, Graphite Heater is widely utilized for creating piston cup, sealing ring and bearings. That's simply because once they run, there is no have to add lubricant.

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