Why can graphite paper conduct electricity

2022-07-22
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Speaking of graphite, you must be familiar with it, but speaking of graphite paper, can you think of the whole piece of black something similar to paper? Graphite paper: high carbon phosphorous graphite is rolled by chemical treatment and high temperature expansion. It is the basic material for manufacturing various graphite seals. The main uses of graphite paper application technology: it is used in notebook computers, flat panel displays, digital video cameras, mobile phones and personal assistant devices

the advantage of graphite paper is that the carbon content is very high. From this, we can see that the conductivity of graphite paper is developed due to the carbon content. Of course, there are other components in graphite paper, such as the chlorine content, which has been said to exceed 35, and the sulfur content has also exceeded 300. From this content, we can see that the tensile strength of the successfully made graphite paper is very high, and its compression ratio is also very good. We can expand and store the graphite paper freely. In terms of application, it is also very convenient. Today, I will unveil the conductive principle of graphite paper and the related knowledge of why graphite paper can conduct electricity

graphite paper introduction

graphite paper: high carbon phosphorous graphite is formed by chemical treatment, high temperature expansion and rolling. It is the basic material for manufacturing various graphite seals

use of graphite paper

with the acceleration of the upgrading of electronic products and the increasing demand for heat dissipation management of mini, high integration and high-performance electronic equipment, a new heat dissipation technology for electronic products has also been introduced, that is, a new solution for heat dissipation of graphite materials. This new natural graphite solution uses graphite paper with high heat dissipation efficiency, small space occupation, light weight, and uniform heat conduction in both directions to eliminate “ Hot spots ” Area, shielding heat sources and components while improving the performance of consumer electronic products

it is mainly used for sealing ring seals, mechanical seals, graphite strips, fillers, composite plates, cylinder gaskets, and basic materials of graphite seals

it is widely used in the dynamic and static sealing of machines, pipes, pumps and valves in electric power, petroleum, chemical industry, instrumentation, machinery, diamond and other industries. It is an ideal new sealing material to replace traditional seals such as rubber, fluoroplastics, asbestos and so on

main uses of graphite paper application technology

it is used in notebook computers, flat panel displays, digital video cameras, mobile phones and personal assistant devices

six characteristics of graphite paper

1. Easy processing of graphite paper: graphite paper can be die-cut into different sizes, shapes and thicknesses, and can provide die-cut flat plates, with a thickness of 0.05 to 1.5m

2. High temperature resistance of graphite paper: the maximum service temperature of graphite paper can reach 400 ℃, and the minimum can be lower than -40 ℃

3. High thermal conductivity of graphite paper: the maximum in-plane thermal conductivity of graphite paper can reach 1500w/mk, and the thermal resistance is 40% lower than that of aluminum and 20% lower than that of copper

4. Flexibility of graphite paper: graphite paper is easy to be made into laminates with metal, insulating layer or double-sided adhesive, which increases design flexibility and can have adhesive behind it

5. Lightness of graphite paper: graphite paper is 30% lighter than aluminum of the same size and 80% lighter than copper

6. Ease of use of graphite paper: graphite heat sink can be smoothly attached to any flat and curved surface

graphite paper manufacturer

Ningbo Yinzhou Huaxin seal manufacturer, main products or services: graphite products; Graphite abnormity processing; Graphite powder; Graphite base; Graphite pouring pipe; Graphite paper; Graphite block; Crystallizer for copper; Various graphite crucibles; Graphite particles (carburizing agent); Graphite rod; Small graphite rod (5-19mm); Launder sheath; Graphite and carbon products; Broken graphite; Graphite ball; Graphite heater; It is a manufacturer specializing in the production of graphite paper and other products. It is widely used in the dynamic and static sealing of machines, pipes, pumps and valves in electric power, petroleum, chemical industry, instrumentation, machinery, diamond and other industries. The product quality is excellent and can meet the application of graphite paper by different consumers

Shanghai Luolai graphite products Material Co., Ltd. mainly exports graphite paper. The graphite paper produced by the company has stronger sealing performance than other graphite papers. It is an ideal new sealing material that can replace traditional seals such as rubber, fluoroplastics, asbestos, etc., and has the function of eliminating “ Hot spots ” Area, shielding heat sources and components while improving the performance of consumer electronic products

Qingdao Heilong graphite Co., Ltd. mainly produces and sells graphite paper, which is widely used in petroleum Chemical engineering Electronics; Toxic Flammable High temperature equipment or components High temperature resistance Corrosion resistance Good conductivity It can be made into various graphite strips, fillers, sealing gaskets, composite plates, cylinder gaskets, etc. Excellent product quality, has been a leader in the industry, deeply loved by the majority of consumers

graphite paper production process

1 With the upgrading of electronic products, more and more mini, accelerated, highly integrated and other electronic devices have entered the electronic market. These electronic products need a certain heat dissipation effect. We can use graphite paper to solve the heat dissipation problem of products under high temperature. It is widely used in dynamic and static sealing of machines, pipes, pumps and valves in power, petroleum, chemical, instrument, machinery, diamond and other industries. It is an ideal new sealing material to replace traditional seals such as rubber, fluoroplastics, asbestos and so on

2. Graphite paper is an expanded graphite product made of flake graphite under the action of nitric acid and hydrogen peroxide. Qingdao Huatai graphite puts the graphite into a cyclone after screening by a drying machine for heating and expansion at 950 ℃

3. Then, according to different specifications, it is calendered for many times to form graphite paper

why can graphite paper conduct electricity

because graphite contains free moving charges, the charges move freely after being energized to form a current, so it can conduct electricity. The real reason why graphite conducts electricity is that six carbon atoms share six electrons to form a large six electron six center ∏ 66 bond, in the same carbon ring of graphite, all 6-membered rings form &prod-& prod; Conjugated system, or in the same carbon ring of graphite, all carbon atoms form a huge large ∏ Key, and this large ∏ All electrons in the bond can flow freely in the layer, which is the reason why graphite paper can conduct electricity

graphite is a lamellar structure with unbound free electrons between the layers, which can move directionally after being energized. In fact, all substances conduct electricity, which is only a matter of resistivity. The structure of graphite determines that it has the lowest resistivity among carbon materials

conductivity principle of graphite paper

carbon is a tetravalent atom. On the one hand, like the outermost electrons of metal atoms, it is easy to lose. The outermost electrons of carbon are less, much like metal, so it has certain conductivity. When pentavalent phosphorus and trivalent boron are infiltrated into it, corresponding free electrons and holes will be generated. In addition, the outer electrons of carbon, which are easy to lose, will move and fill the holes under the action of potential difference. Generate electron flow. This is the semiconductor principle

conductivity of graphite paper

conductivity and thermal conductivity: the conductivity of graphite is 100 times higher than that of general non-metallic minerals. Thermal conductivity exceeds that of steel, iron, lead and other metal materials. The thermal conductivity decreases with the increase of temperature. Even at extremely high temperatures, graphite becomes an insulator. Graphite can conduct electricity because each carbon atom in graphite forms only three covalent bonds with other carbon atoms, and each carbon atom still retains one free electron to transmit charge

editor's summary: the conductive nature of graphite paper is well known. Therefore, we should not place graphite paper next to extremely high electricity content poles in thunderstorm weather, nor should it be touched by children. If children are contaminated with carbon and play with electrical appliances, it is harmful to their health. Of course, although graphite paper has the property of conducting electricity, its heat dissipation effect is extremely high. Anything that can wrap thermal energy with graphite paper has nothing to do with it. After the event, as long as you pay attention to storage, it is safe

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