2015年8月25日星期二

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



Maybe you have noticed Isostatic Graphite or Artificial Graphite. You believe each of them are special and incredible. Then let us know much more about graphite.
As a few of us know, graphite is with its unique nature. Isostatic Graphite is a great example. In other words, graphite has special structure as a result it has its special function.
Firstly,graphite is with higher temperature resistance. Usually speaking, graphite‘s melting point may be up to 3 thousand, nine hundred degrees. At the same time, its boiling point may be as much as 4 thousand, two hundred and twenty 5 degrees. Even the ultra higher temperature arc ignition, weight loss of graphite continues to be very little. What‘s much more, its coefficient of thermal expansion is also extremely 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 can be doubled.
Secondly, graphite is with the function of conductivity. To become particular, graphite is with one hundred times higher conductivity than that of common nonmetal ore. As a matter of reality, it‘s thermal conductivity may be over that of steel, iron, lead and other metal supplies. But on the other hand, its thermal conductivity decreases with the increase of temperature. Even in higher temperature, graphite may be as insulator. Graphite can conduct electrical energy because every carbon atom in graphite forms three covalent bonds with other carbon atoms. What‘s more, every carbon atom still retains one free electrons to charge.
Thirdly, grahite is with good lubrication. To be specific, its lubrication performance depends upon 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 overall performance will probably be.
Fourthly, graphite is with good chemical stability. Graphite has great 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 utilized as wear resistant lubricating material. Usually speaking, graphite, in the mechanical industry, is often utilized as lubricant. As all of us know, the lubricating oil can not be utilized within the condition of higher speed, high temperature and high 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 extensively used for making piston cup, sealing ring and bearings. That is because when they run, there is no need to add lubricant.

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