General Knowledge - General Science - Discussion

Graphite is the 'gray lead in your drawing pencil. Graphite is not lead at all; the misnomer arose because it was mistaken for a form of leGraphite is best suited for lubrication in air. Water vapour is a necessary component for graphite lubrication. The adsorption of water reduces the bonding energy between the hexagonal planes of the graphite to a lower level than the adhesion energy between a substrate and the graphite. Because water vapour is a requirement for lubrication, graphite is not effective in a vacuum. Because it is electrically conductive, graphite can promote galvanic corrosion. In an oxidative atmosphere, graphite is effective at high temperatures up to 450° C continuously and can withstand much higher temperature peaks.

Ad when first discovered in England. Graphite is, in fact, a form of carbon, and is non-toxic. Pencils have never been made from lead, but it was not until the late 18th century that the true composition of the material was identified, and the original name stuck. Modern pencil cores contain an extruded blend of pulverised graphite and clay.

Graphite is best suited for lubrication in air. Water vapor is a necessary component for graphite lubrication. The adsorption of water reduces the bonding energy between the hexagonal planes of the graphite to a lower level than the adhesion energy between a substrate and the graphite. Because water vapor is a requirement for lubrication, graphite is not effective in vacuum. Because it is electrically conductive, graphite can promote galvanic corrosion. In an oxidative atmosphere graphite is effective at high temperatures up to 450°C continuously and can withstand much higher temperature peaks.

Graphite is the 'gray lead in your drawing pencil. Graphite is not lead at all; the misnomer arose because it was mistaken for a form of lead when first discovered in England. Graphite is in fact a form of carbon, and is non-toxic. Pencils have never been made from lead, but it was not until the late 18th century that the true composition of the material was identified, and the original name stuck. Modern pencil cores contain an extruded blend of pulverised graphite and clay.

The individual atoms of graphite are hexagonal in shape and are arranged in overlapping sheets. Although the bonding between the atoms in a particular sheet is strong, the bonding between the atoms of successive sheets is weak. Due to this weak bonding between the atoms in the overlapping sheets, there is a tendency for the sheets to easily slide over each other, which causes slipperiness. It is because of this slipperiness effect that graphite acts as a good lubricant.

Is a necessary component for graphite lubrication. The adsorption of water reduces the bonding energy between the hexagonal planes of the graphite to a lower level than the adhesion energy between a substrate and the graphite. Because water vapour is a requirement for lubrication, graphite is not effective in a vacuum. Because it is electrically conductive, graphite can promote galvanic corrosion.

The layers slide over each other easily because there are only weak forces between them, making graphite slippery. Graphite contains delocalised electrons (free electrons). These electrons can move through the graphite, carrying charge from place to place and allowing graphite to conduct electricity.

In graphite, each carbon atom is bonded to three other carbon atoms in the same plane giving a hexagonal array.

Graphite's structure is formed by the hexagonal arrays being placed in layers one above the other. Due to these layers, it has a slippery texture, and therefore it is used as a lubricant.

Graphite. Used in food industry, railway track joints, open gear, ball bearings, machine-shop works etc. It is also very common for lubricating locks, since a liquid lubricant allows particles to get stuck in the lock worsening the problem. Rest are hars.

It have of weak van der wall forces between the two different layers of graphite molecular structure and hence by the application of little force upper layer slides over lower layer. Hence, it is one of the best solid lubricant.

Graphite contains layers of carbon atoms. The layers slide over each other easily because there are only weak forces between them, making graphite slippery. Graphite contains delocalised electrons (free electrons).