Electric heating furnace for preparing graphene
An electric heating furnace and graphene technology, applied in the field of electric heating furnaces, can solve the problems of waste acid, waste water environmental pollution, expensive chemical vapor deposition technology equipment, complicated processes, etc., and achieve low device cost, simple deposition process operation, and deposition good effect
Inactive Publication Date: 2015-04-22
QINGDAO MATE RUIOU NEW MATERIAL TECH CO LTD
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Problems solved by technology
It is only suitable for a small amount of preparation in the laboratory for research, and a large amount of preparation is likely to produce a large amount of waste acid and waste water, which will cause environmental pollution.
In addition, chemical vapor deposition technology equipment is expensive and the process is complicated
At present, there is no fundamental breakthrough in the preparation method of graphene
Method used
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Embodiment 1
[0027] According to the attached figure 1 As shown, a high-quality quartz tube with a length of 1 m was selected as the deposition furnace, the iridium sheet was used as the carrier material, and the size was 10 mm × 10 mm × 0.5 mm. Before the graphene preparation, keep the vacuum inside the quartz tube. Turn on the power supply, heat the resistance wire, heat the temperature to 950°C, and keep a constant temperature; then open the intake valve, put in methane and hydrogen, and the flow rates are 100ml / min and 50ml / min respectively. Nitrogen rapidly cools the heating part of the furnace body, and at the same time quickly moves the slide rail to quickly cool the heating part to the liquid nitrogen sprayer, and finally obtains high-quality single-layer graphene on the platinum sheet.
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Abstract
The invention discloses an electric heating furnace for preparing graphene. The electric heating furnace comprises a gas supply system, an exhaust system, a heating system, a furnace body sliding system and a deposition system, wherein the supplied gases comprise methane, hydrogen and nitrogen, and a continuous gas inlet mode or a pulsed gas inlet mode is adopted at the gas inlet; the exhaust system refers to a vacuum pump, and a solenoid valve is arranged between the vacuum pump and a deposition chamber; the heating system generates annular heating through a spiral resistance wire by virtue of an external power supply of a lead-out wire; quartz tubes of which two ends are open are arranged on the deposition system; and a closed environment is realized by a heated sealing plug. The electric heating furnace is easy to operate and low in price and is easy to popularize in universities and research institutions.
Description
technical field [0001] The invention belongs to the technical field of graphene preparation, in particular to an electric heating furnace for preparing graphene. Background technique [0002] Graphene is the thinnest and hardest nanomaterial in the world. It is completely transparent and absorbs only 2.3% of light. The thermal conductivity is as high as 5300W / m·K, which is higher than that of carbon nanotubes, and the resistivity is about 10-6Ω·cm. Lower than copper or silver, it is currently the material with the lowest resistivity in the world. Because of its extremely low resistivity and extremely fast electron migration, it is expected to be used to develop a new generation of electronic components or transistors that are thinner and conduct electricity faster. Since graphene is essentially a transparent and good conductor, it is also suitable for making transparent touch screens, light panels, and even solar cells. In recent years, many scientists have devoted themsel...
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IPC IPC(8): C01B31/04
Inventor 岑伟郭雷
Owner QINGDAO MATE RUIOU NEW MATERIAL TECH CO LTD
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