Maybe you've seen Isostatic Graphite or Artificial Graphite. You think both of
them are special and amazing. Then let us know more about graphite.
As a few of us know, graphite is with its unique
nature. Isostatic Graphite is a good instance.
In other words, graphite has unique structure consequently it has its special
function.
Firstly,graphite is with high temperature
resistance. Usually speaking, graphite‘s melting point can be up to 3 thousand,
nine hundred degrees. At the same time, its boiling point can be up to 4
thousand, two hundred and twenty five degrees. Even the ultra higher
temperature arc ignition, weight loss of graphite is still extremely little.
What‘s much more, its coefficient of thermal expansion is also very 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 specific, graphite is with 1 hundred times higher
conductivity than that of general nonmetal ore. As a matter of fact, it‘s
thermal conductivity can be over that of steel, iron, lead and other metal
supplies. But around 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 types three covalent bonds with other carbon atoms. What‘s
more, every carbon atom nonetheless retains 1 totally free electrons to charge.
Thirdly, grahite is with good lubrication. To
become particular, its lubrication performance depends on the size of graphite
flake. In other words, the bigger the flake or Graphite Block is, the smaller the
friction coefficient will be, and the better the lubrication performance will
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 1 application of graphite.
Graphite may be utilized as put on resistant
lubricating material. Usually speaking, graphite, in the mechanical industry,
is frequently utilized as lubricant. As all of us know, the lubricating oil can
not be utilized within the situation of high speed, high temperature and high
stress. But in contrast, graphite‘s wear-resistant material may 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 because once
they run, there is no have to add lubricant.
没有评论:
发表评论