How is natural graphite made
From pencils and diamonds - everything to do with the versatile material graphite
Structure and properties of graphite
Graphite has a layer structure. In each layer, each carbon atom is bound to three others. This results in a two-dimensional network of hexagons. There are strong bonds within each layer, but the bonds between the different layers are very weak. In this way, the layers can easily be shifted against each other and even separated. For this reason graphite is very soft and is therefore even used as a lubricant. However, graphite has other special properties:
Electrical conductivity of graphite
The fact that graphite is electrically conductive results from its atomic structure. Each carbon atom in a graphite crystal has four valence electrons, also called outer electrons, which can form bonds with neighboring atoms. However, only three of the four valence electrons form a bond, the fourth electron remains freely movable and thus enables electricity to be conducted.
Thermal conductivity of graphite
Graphite has excellent thermal conductivity and high temperature resistance at the same time. Graphite has no melting point, so that graphite changes directly from the solid to the gaseous state. This process is called sublimation. In a protective gas atmosphere, graphite becomes plastically deformable from a temperature of 2500 ° C. At temperatures of more than 3750 ° C, graphite sublimes even without the presence of oxygen.
Chemical resistance of graphite
Graphite is one of the most chemically resistant materials. It is resistant to almost all organic chemistry media. These typically include intermediate and / or end products in the petrochemical industry, coal processing, the plastics industry, the production of varnishes, paints, refrigerants and antifreeze, but also in the cosmetics and food industries.
Graphite is also resistant to most inorganic media, for example to non-oxidizing acids, alkalis, aqueous salt solutions and most technical gases.
Download: Chemical resistance of natural graphite
- What famous people practice Kundalini Yoga
- How do you survive the substitute tuition
- What is a Kindle Fire Tablet
- Why are the Borg so strong
- Can vote for prisoners in Canada
- A landlord can forbid guests
- What is a feature phone
- How do you define an image
- What is a compounding pharmacy
- Is Symbiosis University good for design aspirants
- Who invented the laptop 3
- How powerful are the Tunisian armed forces
- Science can't cure Stephen Hawking yet
- What is the ugliest natural hair color
- Which mosquito repellent has a good smell?
- Why do sensitive girls behave irrationally?
- Do you think Elsa is a hypocrite?
- How can NMR data analysis be automated
- Can a government official do social work
- What is a Litecoin Trader
- Where can I buy pecan milk
- Why does my lip piercing shed pus?
- Is rum keto friendly
- What is the best theater school
- Why did France invade Mexico
- How does the lever length increase the force?
- What is n 6
- Elite IAS is a good coaching center
- What is an iPhone X clone
- What does real love mean for women
- Why does London have so many gangs
- What problems does BPM solve
- Why are dental exams so expensive
- What should an author description contain