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Glass Fiber Pure Graphite Conductive Thermal Conductivity

Jun 01, 2017

Glass Fiber Pure Graphite is a honeycomb planar film formed by sp2 hybridization of carbon atoms. It is a quasi-two-dimensional material with only one atomic layer thickness, so it is also called monatomic layer graphite. British University of Manchester physicist Andrei Gem and Constantine Novo Shuo Luofu, with micro-mechanical stripping method successfully isolated from the graphite Glass Fiber Pure Graphite, so jointly won the 2010 Nobel Prize in Physics. The common powder production method of Glass Fiber Pure Graphite is mechanical stripping method, oxidation reduction method, SiC epitaxial growth method, and film production method is chemical vapor deposition (CVD). Because of its very good strength, flexibility, conductivity, thermal conductivity, optical properties, in physics, materials science, electronic information, computer, aerospace and other fields have been developed by leaps and bounds.

        As a new type of nanomaterials with the strongest, strongest and most conductive conductivity, Glass Fiber Pure Graphite is known as "black gold" and "king of new materials", scientists even predict that Glass Fiber Pure Graphite will "completely change the 21st century " It is likely to set off a sweeping global disruptive new technology and new industrial revolution.

In fact, Glass Fiber Pure Graphite was originally present in nature, but it was difficult to peel off the monolayer structure. Glass Fiber Pure Graphite layers are graphite, 1 mm thick graphite contains about 300 million layers of Glass Fiber Pure Graphite. Pencils on the paper gently across, leaving the traces may be a few layers or even just a layer of Glass Fiber Pure Graphite.

        In 2004, two scientists at the University of Manchester, Andre Geim and Konstantin Novoselov, found that they could get thinner in a very simple way Of the graphite flakes. They peeled out the graphite sheet from the highly oriented pyrolytic graphite, and then stuck the two sides of the sheet on a special tape, tearing the tape and dividing the graphite sheet into two. Constantly so that the operation, so thin and thin, and finally, they get only one layer of carbon atoms formed by the sheet, which is Glass Fiber Pure Graphite.

        After this, the new method of preparing Glass Fiber Pure Graphite is endless, and after five years of development, it has been found that the introduction of Glass Fiber Pure Graphite into industrial production is not far off. Therefore, in the next three years, Andrei Gem and Konstantin Novo Shawlov in the monolayer and double Glass Fiber Pure Graphite system were found in the integer quantum Hall effect and room temperature under the conditions of quantum Hall effect , They also won the 2010 Nobel Prize in Physics. Before discovering Glass Fiber Pure Graphite, most physicists believe that thermodynamic fluctuations do not allow any two-dimensional crystals to exist at finite temperatures. So its discovery immediately shook the condensed physicist academia. Although the theoretical and experimental circles believe that the perfect two-dimensional structure can not exist in the non-absolute zero stability, but the single layer of Glass Fiber Pure Graphite in the experiment was prepared.

Strength and flexibility

Tensile strength and elastic modulus of 125GPa and 1.1TPa, respectively, Young's modulus of about 42N / m2, an area of 1m2 Glass Fiber Pure Graphite layer can withstand 4 kg of mass, the strength of about 100 times the ordinary steel, with Glass Fiber Pure Graphite made of bags, can withstand about 2 tons of weight, is currently known to the most powerful material.

Conductive thermal conductivity

One of the most important properties of Glass Fiber Pure Graphite is its unique carrier properties and the quality of the Dirac fermions. Its electron mobility can reach 2 × 105cm2 / V · s, about 80 times the electron mobility in silicon, gallium arsenide 20 times, high temperature stability, conductivity up to 108Ω / m, surface resistance of about 31Ω / Sq (310Ω / m2), lower than copper or silver, is the best material at room temperature conductive. (2630m2 / g), thermal conductivity (5000W · m-1 · K-1 at room temperature) is 36 times that of silicon, 20 times of gallium arsenide, and copper (401W · m · K at room temperature) More than ten times more. Extremely high strength and flexibility, the best conductive thermal conductivity at room temperature makes Glass Fiber Pure Graphite an ideal substitute for ITO (indium tin oxide) and has important applications in flexible conductive film materials.

In addition, the semi-integer quantum Hall effect of the electron carrier and the hole carrier in the Glass Fiber Pure Graphite can be observed by changing the chemical potential by the electric field effect, and Novoselov et al. Observed the quantum dendrites of Glass Fiber Pure Graphite at room temperature Effect.