CN210366999U

CN210366999U - A device for preparing graphite alkene

Info

Publication number: CN210366999U
Application number: CN201920798553.4U
Authority: CN
Inventors: 刘建军
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-05-28
Filing date: 2019-05-28
Publication date: 2020-04-21
Anticipated expiration: 2029-05-28

Abstract

The utility model provides a device for preparing graphite alkene, relates to graphite alkene preparation technical field, the utility model discloses a set up the molten metal in crucible (14), then set up gaseous shunt (17) in the molten metal, the gaseous venthole (16) of the gaseous venthole (16) on the gaseous shunt that get into the molten metal form a plurality of bubbles in discharging the molten metal, and gaseous decomposition is carbon atom on the bubble surface, and carbon atom is graphite alkene in the reassembly on the bubble surface, and is further, the utility model discloses a continuous production of graphite alkene can be realized to powder collector and gas blow pipe (4) that set up respectively on furnace body (10), the utility model has the advantages of production efficiency is high, and is with low costs, is fit for on a large scale popularization and application.

Description

A device for preparing graphite alkene

[ technical field ] A method for producing a semiconductor device

The utility model relates to a graphite alkene preparation technical field, concretely relates to a device for preparing graphite alkene.

[ background of the invention ]

As is known, graphene is a material consisting of carbon atoms in sp²The hybrid tracks form a hexagonal honeycomb lattice two-dimensional carbon nanomaterial. The graphene has excellent optical, electrical and mechanical properties, has important application prospects in the aspects of materials science, micro-nano processing, energy, biomedicine, drug delivery and the like, and is considered to be a revolutionary material in the future. The physicists Andeli Gem and Constantin Nuowoslov of Manchester university in England successfully separate graphene from graphite by a micromechanical stripping method, so that the Nobel prize of 2010 is obtained together, and the common production methods of graphene are a mechanical stripping method, a redox method, a SiC epitaxial growth method and a chemical vapor deposition method (C/A)CVD)。

Chemical Vapor Deposition (CVD) is a method of producing graphene by vapor deposition using a carbon-containing organic gas as a raw material. This is currently the most efficient method for producing graphene. The graphene prepared by the method has the characteristics of large area and high quality, but the main defects of high production cost, low production efficiency and the like exist at the present stage, the process conditions need to be further improved, and how to provide the device for preparing the graphene becomes a long-term technical appeal for technical personnel in the field.

[ summary of the invention ]

In order to achieve the object of the present invention, the utility model provides a device for preparing graphene, the utility model discloses a set up the molten metal in the crucible, then set up the gas shunt in the molten metal, the gas that gets into the molten metal is discharged into the molten metal through the venthole on the gas shunt and is formed a plurality of bubbles, and the gas decomposes into carbon atom on the bubble surface, and carbon atom reassembles into graphene on the bubble surface, the utility model has the advantages of production efficiency is high, and is with low costs.

In order to achieve the purpose, the utility model adopts the following technical scheme:

a device for preparing graphene comprises a hollow shaft, a furnace cover, gas blowing pipes, a powder collector, a furnace body, a crucible and a heater, wherein the upper end of the furnace body is provided with the furnace cover to enable the furnace body to form a closed cavity, the crucible is arranged in a furnace chamber of the furnace body, the heater is arranged on the periphery of the crucible and is connected with electrodes, the top end of the crucible is provided with a crucible cover plate, the outer edge surface of the upper part of the crucible is respectively provided with at least one gas blowing port and at least one powder discharging port, each gas blowing port is internally provided with a gas blowing pipe, the right end of each gas blowing pipe corresponds to graphene powder in the crucible, the left end of each gas blowing pipe penetrates through the outer edge surface of the furnace body to be connected with a gas blowing source, each powder discharging port is respectively connected with the powder collector through a pipeline, a gas splitter is arranged in the crucible, each air inlet is connected with an upwardly extending hollow shaft, the upper end of each hollow shaft penetrates through the crucible cover plate and the furnace cover in sequence and then is connected with an air source, and the upper end of each hollow shaft is connected with an upper shaft lifting device to form the device for preparing graphene.

In the graphene preparation device, an ultrasonic vibration device is arranged at the upper end of the hollow shaft.

In the device for preparing graphene, an air mixing valve is arranged at an air inlet at the upper end of the hollow shaft and is connected with an air source.

The device for preparing graphene is characterized in that the diameter of the air outlet is 0.1-1 mm.

The device for preparing graphene is characterized in that the powder discharge port is connected with a powder collecting pipe A, the powder collecting pipe A is connected with a powder collecting pipe B arranged on a powder collector, and a valve is arranged between the powder collecting pipe A and the powder collecting pipe B.

The device for preparing graphene, the powder collector includes powder collector main part, powder collector apron, baffle dead lever and umbrella-type baffle the upper end of powder collector main part is equipped with the powder collector apron, is equipped with the powder export at the lower extreme of powder collector main part, powder exit linkage powder collection bag is equipped with the powder collecting pipe B who link up to powder collector main part inner chamber on the outer fringe face of powder collector main part, is equipped with downwardly extending's baffle dead lever on the inner fringe face of powder collector apron, is equipped with at least one umbrella-type baffle from top to bottom on the outer fringe face of baffle dead lever, is equipped with the gas vent on the powder collector apron.

The device for preparing graphene is characterized in that a valve is arranged between the powder outlet and the powder collecting bag.

The device for preparing graphene is characterized in that a heat-insulating layer is arranged on the inner edge of the furnace body, and a bottom heat-insulating layer is arranged at the bottom of the furnace body.

The device for preparing graphene is characterized in that a supporting seat is arranged at the bottom of the crucible, and the supporting seat is arranged at the bottom of the furnace body.

Due to the adoption of the technical scheme, the utility model discloses following beneficial effect has:

the utility model discloses a set up the molten metal in the crucible, then set up the gas shunt in the molten metal, the gas that gets into the molten metal forms a plurality of bubbles in the molten metal is discharged to the venthole on the gas shunt, and gas decomposes into carbon atom on the bubble surface, and carbon atom assembles for graphite alkene again on the bubble surface, and is further, the utility model discloses a continuous production of graphite alkene can be realized to powder collector and gas blow pipe that set up respectively on the furnace body, the utility model has the advantages of production efficiency is high, and is with low costs, is fit for on a large scale popularization and application.

[ description of the drawings ]

Fig. 1 is a schematic perspective view of the present invention;

FIG. 2 is a schematic sectional view of the present invention;

in the figure: 1. a hollow shaft; 2. the hollow shaft is perforated; 3. a furnace cover; 4. an air blowing pipe; 5. an exhaust port; 6. a powder collecting pipe A; 7. a powder collecting pipe B; 8. a powder collector body; 9. a powder outlet; 10. a furnace body; 11. a crucible cover plate; 12. an air blowing port; 13. graphene powder; 14. a crucible; 15. a heater; 16. an air outlet; 17. a gas splitter; 18. molten copper; 19. a heat-insulating layer; 20. a bottom insulating layer; 21. an electrode; 22. a cover plate of the powder collector; 23. a baffle fixing rod; 24. an umbrella-shaped baffle; 25. and (4) supporting the base.

[ detailed description ] embodiments

The present invention will be explained in more detail by the following examples, which are intended to protect all the changes and improvements within the scope of the present invention, and are not limited to the following examples;

it should be noted that the directions and positional relationships indicated by "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. used in describing the structure of the present invention are only for convenience of description and simplification of description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and thus, should not be construed as limiting the present invention.

With reference to fig. 1-2, the apparatus for preparing graphene comprises a hollow shaft 1, a furnace cover 3, an air blowing pipe 4, a powder collector, a furnace body 10, a crucible 14 and a heater 15, wherein the furnace cover 3 is arranged at the upper end of the furnace body 10 to enable the furnace body to form a sealed cavity, a sealing ring is arranged between the furnace body 10 and the furnace cover 3 to improve the sealing performance of the cavity, the sealing ring is preferably a 0-shaped ring, in particular, in order to improve the heat preservation effect of the cavity, a heat preservation layer 19 is arranged on the inner edge of the furnace body 10, and a bottom heat preservation layer 20 is arranged at the bottom of the furnace body 10;

further, a crucible 14 is arranged in the furnace chamber of the furnace body 10, a support seat 25 is arranged at the bottom of the crucible 14, the support seat 25 is arranged on the bottom of the furnace body 10, a heater 15 is arranged at the periphery of the crucible 14, the heater 15 is connected with an electrode 21, and the electrode 21 is externally connected with a power supply; the top end of the crucible 14 is provided with a crucible cover plate 11, the outer edge surface of the upper part of the crucible 14 is respectively provided with at least one air blowing opening 12 and at least one powder discharging opening, and in the specific implementation, the arrangement number of the air blowing openings 12 and the powder discharging openings is selected according to the size of the crucible 14, and is generally selected to be one; each blowing port 12 is internally provided with a blowing pipe 4, the right end of each blowing pipe 4 corresponds to the graphene powder 13 in the crucible 14, the left end of each blowing pipe 4 penetrates through the outer edge surface of the furnace body 10 and is connected with a blowing gas source, and the gas in the blowing gas source is preferably nitrogen; each powder discharge port is respectively connected with the powder collector through a pipeline, and in the specific implementation, one or more powder collectors can be arranged, namely, each powder discharge port is independently connected with one powder collector through a pipeline, or can be jointly connected with one powder collector through a plurality of pipelines; the powder collector comprises a powder collector main body 8, a powder collector cover plate 22, a baffle fixing rod 23 and an umbrella-shaped baffle 24, a powder collector cover plate 22 is arranged at the upper end of the powder collector main body 8, a powder outlet 9 is arranged at the lower end of the powder collector main body 8, the powder outlet 9 is connected with a powder collecting bag, a powder collecting pipe B7 which penetrates through the inner cavity of the powder collector main body 8 is arranged on the outer edge surface of the powder collector main body 8, a baffle fixing rod 23 extending downwards is arranged on the inner edge surface of the cover plate 22 of the powder collector, at least one umbrella-shaped baffle 24 is arranged on the outer edge surface of the baffle fixing rod 23 from top to bottom, the exhaust port 5 is arranged on the cover plate 22 of the powder collector, the control valve is arranged on the exhaust port 5, when the concrete implementation is carried out, a valve can be arranged between the powder outlet 9 and the powder collecting bag, namely, the valve is opened to take out the graphene powder 13 after the graphene powder is precipitated to a certain amount; a gas splitter 17 is arranged in the crucible 14, a plurality of gas outlets 16 and at least one gas inlet are respectively arranged on the gas splitter 17, and the diameter of each gas outlet 16 is 0.1-1 mm; each air inlet is respectively connected with an upwardly extending hollow shaft 1, the specific arrangement number of the hollow shafts 1 is determined according to the size of a crucible 14, one hollow shaft is generally selected, the upper end of the hollow shaft 1 sequentially penetrates through a crucible cover plate 11 and a furnace cover 3 and then is connected with an air source, or an air mixing valve is arranged at an air inlet at the upper end of the hollow shaft 1 and is connected with the air source; in specific implementation, in order to ensure the tightness of the cavity, a hollow shaft through hole 2 is arranged on the furnace cover 3, and a sealing ring is arranged between the hollow shaft 1 and the hollow shaft through hole 2; the upper end of the hollow shaft 1 is connected with an upper shaft lifting device to form the device for preparing graphene.

Further, in order to improve the production efficiency and the product quality of graphene, an ultrasonic vibration device is provided at the upper end of the hollow shaft 1, so that the air bubbles discharged from the gas splitter 17 can be more uniform and fine.

It should be noted that the upper shaft lifting device and the ultrasonic vibration device related to the present invention are all commonly used structures in the field, and are not the key points of the present invention, so detailed description of the specific structures thereof is not required.

Further, the powder discharge port is connected with a powder collecting pipe A6, the powder collecting pipe A6 is connected with a powder collecting pipe B7 arranged on the powder collector, a valve is arranged between the powder collecting pipe A6 and the powder collecting pipe B7, and the valve is arranged to enable the cavity and the powder collector to be freely switched with one sealed cavity when continuous production is achieved. In particular, in order to improve the automation degree of the equipment, the valve can be selected to be an electromagnetic valve.

The preparation method of the utility model specifically comprises the following steps:

step one, melting molten metal:

starting a power supply, closing a valve positioned at the lower part of the powder collector, integrating the powder collector and the sealed cavity at the moment, introducing argon into the sealed cavity, wherein the pressure is 0.1mpa, heating the crucible 14 through a heater 15, starting a gas source after metal in the crucible 14 is melted into molten metal, introducing gas in the gas source into a gas splitter 17 through a hollow shaft 1, starting an upper shaft lifting device, driving the hollow shaft 1 to slowly descend through the upper shaft lifting device, and immersing the gas splitter 17 below the liquid level of the molten metal; the molten metal is a molten copper 18, the purity of copper is preferably more than 99.9%, and in specific implementation, catalysts such as nickel, iron, cobalt and the like can be added into the molten copper 18 to accelerate the reaction rate;

secondly, cracking to generate graphene:

gas entering the molten metal is discharged into the molten metal through the gas outlet 16 on the gas splitter 17 to form a plurality of bubbles, the gas is decomposed into carbon atoms on the surfaces of the bubbles, the carbon atoms are reassembled into graphene on the surfaces of the bubbles, and then the graphene reaches the surface of the molten metal along with the bubbles and is gathered together; the gas in the gas source is a mixed gas obtained by mixing hydrocarbon gas and inert gas or any one of hydrogen or nitrogen; the hydrocarbon gas in the mixed gas accounts for 2-5% of the total weight of the mixed gas; the hydrocarbon gas is any one of methane, acetylene and natural gas; the pressure of the gas source is 0.1-1 mpa;

step three, collecting stone graphene powder:

after the previous step, when the graphene powder 13 on the surface of the molten metal is gathered to a preset height, starting a blowing source, opening an exhaust port 5, blowing the graphene powder 13 into a powder collector through a powder collecting pipe A6 and a powder collecting pipe B7 by gas in the blowing source through a blowing pipe 4, wherein the graphene powder 13 blown into the powder collector is deposited downwards under the blocking of an umbrella-shaped baffle plate 24, when the graphene powder is deposited to a certain weight, firstly closing a valve positioned between the powder collecting pipe A6 and the powder collecting pipe B7 to ensure that the powder collector forms an independent cavity to ensure that a furnace body is in a closed state, so that the continuous decomposition of the graphene is not influenced, then opening the valve positioned below a powder outlet 9 to take out the graphene powder 13 in the powder collector, closing the valve positioned below the powder outlet 9 to vacuumize the powder collector after the graphene powder 13 is taken out, and (3) filling argon, and when the pressure reaches the pressure consistent with the pressure of the furnace body, opening a valve between the powder collecting pipe A6 and the powder collecting pipe B7, and starting a new round of graphene powder collection.

The utility model discloses when concrete production, can adopt the mobile state production of malleation in the furnace body, when adopting mobile production, can set up air inlet and gas vent on furnace body 10 respectively.

The details of the above are not described in detail since they are prior art.

The embodiments selected for the purpose of disclosing the invention, are presently considered to be suitable, it being understood, however, that the invention is intended to cover all variations and modifications of the embodiments, which fall within the scope of the concept and invention.

Claims

1. The utility model provides an apparatus for preparing graphite alkene, includes hollow shaft (1), bell (3), gas blow pipe (4), powder collector, furnace body (10), crucible (14) and heater (15), characterized by: the furnace body is provided with a furnace cover (3) at the upper end of the furnace body (10) to form a closed cavity, a crucible (14) is arranged in a furnace chamber of the furnace body (10), a heater (15) is arranged at the periphery of the crucible (14), the heater (15) is connected with an electrode (21), a crucible cover plate (11) is arranged at the top end of the crucible (14), at least one air blowing opening (12) and at least one powder discharging opening are respectively arranged on the outer edge surface of the upper part of the crucible (14), an air blowing pipe (4) is respectively arranged in each air blowing opening (12), the right end of each air blowing pipe (4) corresponds to graphene powder (13) in the crucible (14), the left end of each air blowing pipe (4) penetrates through the outer edge surface of the furnace body (10) to be connected with an air blowing source, each powder discharging opening is respectively connected with a powder collector through a pipeline, a gas flow divider (17) is arranged in the crucible (14), a plurality of air outlets (16) and at least one air, each air inlet is connected with an upwardly extending hollow shaft (1), the upper end of each hollow shaft (1) penetrates through a crucible cover plate (11) and a furnace cover (3) in sequence and then is connected with an air source, and the upper end of each hollow shaft (1) is connected with an upper shaft lifting device to form the device for preparing graphene.

2. The apparatus of claim 1, wherein: the upper end of the hollow shaft (1) is provided with an ultrasonic vibration device.

3. The apparatus of claim 1, wherein: and an air mixing valve is arranged at an air inlet at the upper end of the hollow shaft (1) and is connected with an air source.

4. The apparatus of claim 1, wherein: the diameter of the air outlet (16) is 0.1-1 mm.

5. The apparatus of claim 1, wherein: the powder discharging port is connected with a powder collecting pipe A (6), the powder collecting pipe A (6) is connected with a powder collecting pipe B (7) arranged on the powder collector, and a valve is arranged between the powder collecting pipe A (6) and the powder collecting pipe B (7).

6. The apparatus of claim 1, wherein: the powder collector comprises a powder collector main body (8), a powder collector cover plate (22), a baffle fixing rod (23) and an umbrella-shaped baffle (24), the powder collector cover plate (22) is arranged at the upper end of the powder collector main body (8), a powder outlet (9) is arranged at the lower end of the powder collector main body (8), the powder outlet (9) is connected with a powder collecting bag, a powder collecting pipe B (7) penetrating through to an inner cavity of the powder collector main body (8) is arranged on the outer edge surface of the powder collector main body (8), the baffle fixing rod (23) extending downwards is arranged on the inner edge surface of the powder collector cover plate (22), at least one umbrella-shaped baffle (24) is arranged on the outer edge surface of the baffle fixing rod (23) from top to bottom, and an exhaust port (5) is arranged on the powder collector cover plate (.

7. The apparatus of claim 6, wherein: a valve is arranged between the powder outlet (9) and the powder collecting bag.

8. The apparatus of claim 1, wherein: the inner edge of the furnace body (10) is provided with a heat-insulating layer (19), and the bottom of the furnace body (10) is provided with a bottom heat-insulating layer (20).

9. The apparatus of claim 1, wherein: the bottom of the crucible (14) is provided with a supporting seat (25), and the supporting seat (25) is arranged on the bottom of the furnace body (10).