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    Graphite electronic effect

    Time:2023.02.11Browse:1

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    The load migration rate of graphene at room temperature is about 15000cm2/(v · s). This value exceeds 10 times the silicon material. More than twice. Under certain conditions such as low temperature, the load migration rate of graphene can even be as high as 250000cm2/(v · s). Unlike many materials, the electronic migration rate of graphene is less affected by temperature changes. At any temperature between 50 and 500K, the electronic migration rate of a single layer of graphene is about 15000cm2/(v · s).

    In addition, the semi -integer quantity Hall effect of the electronic carrier and the cave carrier in the graphene can be observed by changing the chemical potential through the influence of the electric field, and scientists have observed the quantum Hall effect of graphene under room temperature conditions. Essence [9] The carrier in the graphene follows a special quantum tunnel effect, which will not produce back scattering when encountering impurities. reason. Neither electron and photons in graphene have no static quality, and their speed is a constant that has nothing to do with kinetic energy.

    The industrialization of graphite expansion graphite environmental materials

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    Detailed introduction of graphite board characteristics

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    Graphite flotation method

    Floating is a commonly used and important mineral method. Graphite has good natural floating. Basically, all graphite can be purified by floating methods. In order to protect graphite scales, most of the graphite flotation uses multiple sections of processes. Graphite flotation collecting agents are generally used for kerosene, with a dosage of 100 to 200g/t. The foaming agent is generally used with pine or butad ether, and the amount is 50 to 250g/t.

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    Impermeable graphite material

    Impermeable graphite is an ideal material with good corrosion resistance and thermal conductivity in chemical production. It can be used to make heat exchangers, reaction tanks, absorption towers, gas combustion towers, hydrochloric acid synthesis furnaces, graphite centrifugal pumps, jet pumps, and various pipelines and joints. Impermeable graphite is divided into three categories:1. Impregnated impermeable graphite products - This is made by impregnating the graphite matrix. Impregnating agents not only reduce the porosity of graphite, but also increase the compressive strength and tensile strength of graphite materials by 1-2.5 times and 4-5 times respectively; Increase bending strength by 2-3 times; Increase the impact strength by 2-2.5 times. Commonly used impregnating agents include phenolic resin, furfural ketone resin, furfural alcohol resin, organic silicon resin, water glass, paraffin, divinylbenzene, asphalt, etc.2. Pressed impermeable graphite product - is a material made