2015年8月26日星期三

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



Perhaps you have seen Isostatic Graphite or Artificial Graphite. You believe 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 unique 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 may be up to 4 thousand, two hundred and twenty five degrees. Even the ultra higher temperature arc ignition, weight loss of graphite is still very small. What‘s more, its coefficient of thermal expansion is also extremely little. 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 using the feature of conductivity. To be particular, graphite is with one hundred times higher conductivity than that of general nonmetal ore. As a matter of reality, it‘s thermal conductivity can be more than that of steel, iron, lead and other metal materials. But on the other hand, its thermal conductivity decreases with the increase of temperature. Even in high temperature, graphite can be as insulator. Graphite can conduct electrical energy simply because every carbon atom in graphite forms 3 covalent bonds with other carbon atoms. What‘s more, every carbon atom nonetheless retains one free electrons to charge.
Thirdly, grahite is with great lubrication. To become particular, its lubrication overall performance depends on the size of graphite flake. In other words, the larger the flake or Graphite Block is, the smaller the friction coefficient will be, and the better the lubrication overall performance will probably be.
Fourthly, graphite is with great chemical stability. Graphite has good 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 utilized as put on resistant lubricating material. Usually speaking, graphite, within 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, higher temperature and higher 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 many devices that transport the corrosive medium, Graphite Heater is extensively used for creating piston cup, sealing ring and bearings. That's simply because when they run, there is no have to add lubricant.

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