2015年8月9日星期日

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



 Maybe you've noticed Isostatic Graphite or Artificial Graphite. You believe each of them are unique and amazing. Then let us know much more about graphite.
As a few of us know, graphite is with its unique nature. Photovoltaic Graphite is really a good example. In other words, graphite has special structure as a result it has its unique feature.
Firstly,graphite is with higher temperature resistance. Usually speaking, graphite is melting point can be up to three thousand, nine hundred degrees. Simultaneously, 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 is still extremely small. What is more, its coefficient of thermal expansion can also be very 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 may be doubled.
Secondly, graphite is with the feature of conductivity. To be particular, graphite is with one hundred occasions higher conductivity than that of common nonmetal ore. As a matter of fact, it is thermal conductivity may be more than that of steel, iron, lead as well as other metal materials. But on 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 three covalent bonds with other carbon atoms. What is much more, each carbon atom still retains 1 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 probably be, and also the 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 discuss 1 application of graphite.
Graphite can be used as put on resistant lubricating material. Usually speaking, graphite, within the mechanical industry, is frequently used as lubricant. As all of us know, the lubricating oil can not be utilized within the condition of higher speed, high temperature and high stress. But in contrast, graphite is wear-resistant material may be used 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 is extensively utilized for making piston cup, sealing ring and bearings. That is because when they run, there's no have to add lubricant.

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