What is the melting point of graphite?


What is the melting point of graphite? The remarkable thermal characteristics of graphite are without a doubt the mineral’s most noteworthy and distinctive attribute. In addition to being an excellent heat conductor, it possesses exceptional CTE values (coefficients of thermal expansion) and is extremely difficult to melt, which results in an extremely high melting point for the material. In point of fact, according to the scientific definition of the term, graphite does not have a melting point until you reach around 100 atmospheres.

What is the melting point of graphite?

In addition, the point at which the melting point is located is between 3,600 and 4,200 degrees Kelvin, which is equivalent to about 6,000 and 7,000 degrees Fahrenheit. This represents approximately two-thirds of the temperature of the photosphere of our sun. In a manner analogous to that of carbon dioxide, the substance transforms straight from a solid-state into a gaseous state.

What is the melting point of graphite?

As a consequence of this, carbon is definitely one of the materials that should be considered first when it comes to applications that include heat and heat transfers.

  1. Melting Point

As a result of the material’s unexpectedly high melting point, graphite is frequently utilized in the production of crucibles, molded products, and specialty plates (also known as wall liners) for high-temperature furnaces and fireproofing systems, including rooms, lockers, safes, and other similar spaces. Graphite molds are able to be used, and frequently are used, in the production of a wide variety of molded consumer goods. However, in order to shape a product, a molten substance must be used as the starting point first.

At this point, a crucible can be of great assistance. Before metallurgists may pour molten materials, graphite crucibles are often used to melt down the material and hold it while it is being melted down. Graphite materials are frequently utilized for the actual molds when the molten materials are poured into a cavity (such as ingot molds, injection molds, blow molds, casting dies, and so on).

Graphite has an inherent resilience to and immunity to extremely high temperatures, which is plainly the reason for this. Carbon fibers are also utilized in the production of flame-retardant fabrics, which can be found in a variety of consumer goods, including clothing, furniture, and other commonplace items. The carbon fibers that are interjected, blended, and woven into these materials frequently reduce the overall flammability, and in some cases, the carbon fibers also offer self-extinguishing properties.

Despite the fact that these products can and still do catch fire, the flammability of these materials is typically decreased thanks to the carbon fibers. Carbon, in the form of graphite plates, is utilized not only in the production of materials that are fire-resistant but also in the development of fireproofing systems. These plates are frequently installed on the walls of rooms, lockers, and safes with the purpose of providing protection against fire, which eventually protects the contents of those spaces.

  1. High Thermal Conductivity

Graphite also has extraordinary capabilities in terms of its ability to transport heat. This is unavoidable because of the remarkable thermal conductivities that they possess. There are a number of graphite materials that have conductivities that can reach as high as 120-240 W/m°K (70-140 btu•ft/hr•ft2•°F). Some graphite composites have conductivities that have been measured to be as high as 1,000-2,000 W/m°K.

What is the melting point of graphite?

In situations that require the removal of heat energy, it is common practice to make use of materials that have a high thermal conductivity. Materials like these are examples of such materials. Primarily included in this category are heat sinks, heat shields, and heat exchangers. Graphite and carbon composites are used in the production of several of them.

Carbon fibers are utilized on occasion in the construction of motherboards and circuit boards for the purpose of transferring heat away from components that are particularly sensitive to heat. These identical materials are also being utilized in the development of thermal management systems for LEDs and thermal cores for modern electronic equipment.

  1. Low Coefficient of Thermal Expansion

Graphite is also exceptional because of the thermal expansion qualities that it possesses (CTE). When a material or substance is heated, it will usually cause the material or substance to expand. Graphite, on the other hand, has a coefficient of thermal expansion that is incredibly low. This indicates that it can be heated and subjected to temperatures that are exceedingly high without experiencing much of an expansion.

When it comes to furnace components, molds that are used in the sector of mold building, equipment used in the manufacturing of glass, and even some epoxies and thermal pastes, this is something that is really beneficial and very vital.


Among all thermally conductive fillers, graphite deserves special interest not only due to its high thermal conductivity, which ranges from 25–470 W m1 K1, but also due to its high thermal stability, exceptional chemical resistance, and mechanical properties [40]. Graphite also possesses exceptional mechanical properties.


Copper and aluminum are the two metals most commonly used in the construction of heat sinks.


Aluminum Heat Sinks

The most frequent component used in heat sink construction is aluminum. In particular, heat sinks made of extruded aluminum are adaptable to the requirements of the majority of projects. The metal is not only easy to work with but also has a rather high thermal conductivity.


Heat sinks are designed to transfer heat away from the equipment they are attached to. They accomplish this by increasing the amount of surface area that the device has. It is necessary for heat sinks to have a temperature that is greater than their surroundings in order for them to be effective in transferring heat.

Is graphite characterized by a high melting and boiling point?

The strong covalent bonds that keep the carbon atoms together in the layers of graphite take a lot of heat energy to break, which is why graphite still has extremely high melting and boiling point.

Which material, graphite or diamond, has a greater melting point?

Because graphite’s C-C bonds have a partial double bond character, they are stronger and more difficult to break than diamond’s C-C bonds. As a result, graphite’s melting point is somewhat higher than that of a diamond.

Is graphene more abrasion-resistant than a diamond?

The qualities of strength and rigidity

But since the atoms that make up those layers are bound together so firmly, graphene, like carbon nanotubes (but unlike graphite), is incredibly sturdy; in fact, it is even more sturdy than diamond. It is claimed that graphene, which is approximately 200 times stronger than steel, is the strongest material that has yet to be discovered.

What is the lowest temperature at which graphene will melt?

Graphene and the analogs of graphene are projected to have melting values that are among the highest of all materials. According to research done in the past, the melting temperature for freestanding graphene is a stunning 4510 degrees Celsius.

How much does it cost to buy graphene?

Although precise pricing information is difficult to come by for this wonder material of the 21st century, recent estimates place the cost of producing graphene at approximately $100 per gram in the United States. Graphene may come with a hefty price tag, but it has many interesting potential applications. Graphene-polymer composites are one notable example of how their properties have been put to use.

Is the bonding in graphite more powerful?

The mineral graphite cannot be dissolved in water… Because it has a high melting point and is an excellent conductor of electricity, it is an excellent material for the electrodes that are required for the electrolysis process. Three powerful covalent connections hold each individual carbon atom securely within its layer.

Why does graphite have a high melting point despite the fact that it is a brittle material?

Explain the qualities of graphite in terms of bonding and structure, given that it is an excellent conductor of electricity, that it is soft, and that its melting point is extremely high. Because the electrons are dispersed throughout the material, it is an excellent conductor. The layers are only kept together by weak Van der Waals’ forces, which allows for the layers to slide over one another, hence the material is soft.

What causes the graphite to be so mushy and slippery?

Graphite is able to conduct electricity because the electrons that have been delocalized are free to travel throughout the structure… Graphite layers are able to slide over each other because the forces that hold them together are relatively weak. Since of this, graphite can be used as a lubricant because it becomes slippery.

Is it possible for a diamond to conduct heat?

Conductivity to heat or cold

Diamond, in contrast to the majority of electrical insulators, is an excellent heat conductor due to the strong covalent bonding and low phonon dispersion that it possesses. The thermal conductivity of natural diamond was measured to be approximately 2200 W/(mK), which is almost five times higher than the conductivity of silver, which is the metal with the highest thermal conductivity.

Why is graphite so soft, but diamond is so hard?

Because each of its carbon atoms forms four covalent bonds in a tetrahedral structure, diamond is far more brittle than graphite. This is owing to the presence of strong covalent bonds within the diamond as well. Graphite, on the other hand, is a soft substance that is also very slippery, despite the fact that both graphite and diamond contain carbon.

Is graphene capable of stopping a bullet?

Graphene has been shown to be more resistant to the force of a bullet’s impact than either steel or Kevlar, according to the findings of a group of academics working at Rice University in the United States.

Is graphene flammable?

The fact that graphene burns at an exceptionally high temperature present a challenge to its continued research and commercialization… Because of these factors, graphene and other materials with a two-dimensional structure have a significant amount of potential to replace conventional semiconductors.

To what temperature can graphene be heated?

Drumheads made of graphene can vibrate at temperatures above 900 degrees Celsius, which is the greatest operating temperature that has ever been reported for electromechanical resonators of this type. Graphene drumheads are atomically thin.

Does Tesla employ graphene?

Tesla, a company that is most known for producing electric automobiles, frequently brags about the effective batteries that it manufactures. However, these are not only utilized in automobiles… Vinson Leow, CEO of the ASAP company, mentioned that the Chargeasap Flash 2.0 makes use of Graphene battery cells produced by Panasonic. These are the same cells that are utilized in the autos produced by the manufacturer of electric vehicles.

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