High-temperature carbonization furnace for preparing graphene

Abstract

The utility model relates to the technical field of graphene preparation, and discloses a high-temperature carbonization furnace for graphene preparation. The heating device comprises a heating ring, the heating ring is fixedly connected with the side, close to the furnace door, of the furnace wall, a clamping ring is installed on the outer side of the heating ring and matched with the heating ring, a heating pipe is installed at the end, away from the heating ring, of the clamping ring and wraps the outer side of the graphene substrate, and multiple rows of heating pipe holes are formed in the surface of the heating pipe. The heating ring is started to enable the heating pipe to reach the temperature required by graphene preparation, the heating pipe hole is formed to facilitate gas flow in the furnace, and the graphene substrate is uniformly heated under the wrapping of the heating pipe, so that the graphene preparation efficiency is improved. The problems that the finished product graphene cannot uniformly grow on the surface of the substrate and the graphene production efficiency is not high enough due to the fact that the coverage area of a uniform temperature area is smaller than the surface area of the substrate in the heating process of an existing heating method are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of graphene preparation, in particular to a high-temperature carbonization furnace for graphene preparation. Background Art

[0002] Graphene is an allotrope of carbon. Carbon atoms are bonded by sp 2 hybridization to form a single-layer hexagonal honeycomb lattice graphene. Using this crystal structure of graphene, fullerenes, graphene quantum dots, carbon nanotubes, nanoribbons, multi-walled carbon nanotubes and nanohorns can be constructed. Graphene has excellent optical, electrical and mechanical properties, and has important application prospects in materials science, micro-nano processing, energy, biomedicine and drug delivery, etc., and is considered to be a revolutionary material in the future.

[0003] The graphene carbonization furnace is a device for high-temperature treatment of graphene materials. It plays a key role in the production process of graphene and can perform high-temperature sintering on materials under atmosphere protection. Existing graphene carbonization furnaces usually set heating tubes on both sides of the furnace body. In this heating method, the coverage area of the isothermal zone during heating is smaller than the surface area of the substrate, resulting in the failure of the finished graphene to grow uniformly on the surface of the substrate, and the production efficiency of graphene is not high enough.

[0004] Therefore, in order to solve such problems, we propose a high-temperature carbonization furnace for graphene preparation. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a high-temperature carbonization furnace for graphene preparation, aiming to solve the problem in the above background art that the coverage area of the isothermal zone during heating is smaller than the surface area of the substrate, resulting in the failure of the finished graphene to grow uniformly on the surface of the substrate, and the production efficiency of graphene is not high enough.

[0006] To achieve the above purpose, the utility model adopts the following technical scheme: A high-temperature carbonization furnace for graphene preparation, including a bottom plate, a furnace body is welded above the bottom plate, a furnace wall is welded at one end of the furnace body, the furnace wall is fixedly connected with the bottom plate, the furnace wall includes a furnace wall main body, a telescopic mechanism is installed inside the furnace wall main body, a driving end of the telescopic mechanism is fixedly connected with a graphene substrate, one end of the graphene substrate away from the telescopic mechanism is fixedly connected with a furnace door, the furnace door is slidably connected with the furnace body, a heating device is installed on one side of the furnace wall close to the furnace door, and it is characterized in that: the heating device includes a heating coil, the heating coil is fixedly connected with one side of the furnace wall close to the furnace door, a clamping ring is installed outside the heating coil, the clamping ring is matched with the heating coil, a heating tube is installed at one end of the clamping ring away from the heating coil, the heating tube is wrapped outside the graphene substrate, and a plurality of rows of heating tube holes are formed on the surface of the heating tube.

[0007] Preferably, the telescopic mechanism includes an electric cylinder, which is fixedly connected to the inner side of the furnace wall body. The driving end of the electric cylinder is fixedly connected with a telescopic sleeve rod, and the telescopic sleeve rod is fixedly connected with the graphene substrate.

[0008] Preferably, the furnace door includes a furnace door body. A viewing window is installed on the side of the furnace door body away from the furnace wall. An interface is provided on the side of the furnace door body away from the viewing window. Moving wheels are installed below the furnace door body.

[0009] Preferably, the interface includes a vacuum pump interface. An inert gas interface is provided on one side of the furnace door body where the vacuum pump interface is located. A carbon source gas interface is provided on the side of the furnace door body where the inert gas interface is away from the vacuum pump interface.

[0010] Preferably, the graphene substrate includes a central tube, which is matched with the telescopic sleeve rod. A quartz tube is sleeved outside the central tube, and a metal film is wrapped on the outer surface of the quartz tube.

[0011] Preferably, a circular slot is opened on the side of the furnace door body close to the furnace wall, and the circular slot is matched with the central tube.

[0012] The utility model has the following beneficial effects:

[0013] In the utility model, the heating device includes a heating coil, which is fixedly connected to the side of the furnace wall close to the furnace door. A clamping ring is installed outside the heating coil, and the clamping ring is matched with the heating coil. One end of the clamping ring away from the heating coil is installed with a heating tube, and the heating tube is wrapped outside the graphene substrate. Multiple rows of heating tube holes are opened on the surface of the heating tube. By starting the heating coil, the heating tube reaches the temperature required for preparing graphene. By setting the heating tube holes, it is convenient for the gas in the furnace to flow. Under the wrapping of the heating tube, the graphene substrate is uniformly heated, and the generated graphene will uniformly cover the surface of the graphene substrate. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a three-dimensional schematic diagram of a high-temperature carbonization furnace for graphene preparation proposed by the utility model;

[0015] Figure 2 is a plan schematic diagram of a high-temperature carbonization furnace for graphene preparation proposed by the utility model;

[0016] Figure 3 is a plan schematic diagram of the furnace door in a high-temperature carbonization furnace for graphene preparation proposed by the utility model;

[0017] Figure 4 is a three-dimensional schematic diagram of the graphene substrate in a high-temperature carbonization furnace for graphene preparation proposed by the utility model;

[0018] Figure 5A three-dimensional schematic diagram of a heating tube in a high-temperature carbonization furnace for preparing graphene proposed by the present utility model.

[0019] Legend description:

[0020] 1. Bottom plate; 2. Furnace body; 3. Furnace wall; 31. Furnace wall main body; 32. Telescopic mechanism; 321. Electric cylinder; 322. Telescopic sleeve rod; 4. Furnace door; 41. Furnace door main body; 411. Circular slot hole; 42. Observation window; 43. Interface; 431. Vacuum pump interface; 432. Inert gas interface; 433. Carbon source gas interface; 44. Moving wheel; 5. Graphene substrate; 51. Central tube; 52. Quartz tube; 53. Metal film; 6. Heating device; 61. Heating coil; 62. Clamping ring; 63. Heating tube; 631. Heating tube hole. Specific implementation manners

[0021] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0022] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model. The terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance. In addition, unless otherwise clearly defined and limited, the terms "installation", "connection", "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection. It can be a mechanical connection or an electrical connection. It can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0023] Please refer to Figures 1 - 5, an embodiment provided by the present utility model: a high-temperature carbonization furnace for graphene preparation, comprising a bottom plate 1, a furnace body 2 is welded above the bottom plate 1, a furnace wall 3 is welded at one end of the furnace body 2, the furnace wall 3 is fixedly connected to the bottom plate 1, the furnace wall 3 includes a furnace wall main body 31, a telescopic mechanism 32 is installed inside the furnace wall main body 31, a graphene substrate 5 is fixedly connected to the driving end of the telescopic mechanism 32, a furnace door 4 is fixedly connected to the end of the graphene substrate 5 away from the telescopic mechanism 32, the furnace door 4 is slidably connected to the furnace body 2, a heating device 6 is installed on one side of the furnace wall 3 close to the furnace door 4, and it is characterized in that: the heating device 6 includes a heating coil 61, the heating coil 61 is fixedly connected to one side of the furnace wall 3 close to the furnace door 4, a clamping ring 62 is installed outside the heating coil 61, the clamping ring 62 is matched with the heating coil 61, a heating pipe 63 is installed at the end of the clamping ring 62 away from the heating coil 61, the heating pipe 63 is wrapped outside the graphene substrate 5, and a plurality of rows of heating pipe holes 631 are formed on the surface of the heating pipe 63. By starting the heating coil 61, the heating pipe 63 can reach the temperature required for graphene preparation. By setting the heating pipe holes 631, it is convenient for the gas in the furnace to flow. Under the wrapping of the heating pipe 63, the graphene substrate 5 is heated evenly, and the generated graphene will evenly cover the surface of the graphene substrate 5.

[0024] Please refer to Figure 2 , the telescopic mechanism 32 includes an electric cylinder 321, the electric cylinder 321 is fixedly connected to the inside of the furnace wall main body 31, a telescopic sleeve rod 322 is fixedly connected to the driving end of the electric cylinder 321, and the telescopic sleeve rod 322 is fixedly connected to the graphene substrate 5. Under the pushing action of the electric cylinder 321, the telescopic sleeve rod 322 can be telescoped.

[0025] Please refer to Figure 2 , the furnace door 4 includes a furnace door main body 41, an observation window 42 is installed on one side of the furnace door main body 41 away from the furnace wall 3, an interface 43 is arranged on the side of the furnace door main body 41 away from the observation window 42, and a moving wheel 44 is installed below the furnace door main body 41, so that the furnace door 4 can be opened by parallel movement, which is convenient for the operator to remove graphene from the graphene substrate 5 after the reaction ends.

[0026] Please refer to Figure 3 , the interface 43 includes a vacuum pump interface 431, an inert gas interface 432 is arranged on one side of the furnace door main body 41 where the vacuum pump interface 431 is located, and a carbon source gas interface 433 is arranged on the side of the furnace door main body 41 where the inert gas interface 432 is away from the vacuum pump interface 431.

[0027] Please refer to Figure 4, the graphene substrate 5 includes a central tube 51, the central tube 51 is matched with the telescopic sleeve rod 322, the central tube 51 is sleeved at one end of the telescopic sleeve rod 322, and the connection between the central tube 51 and the telescopic sleeve rod 322 is detachable. A quartz tube 52 is sleeved outside the central tube 51, and a metal film 53 is wrapped on the outer surface of the quartz tube 52. The graphene generated by the reaction will grow on the surface of the metal film 53.

[0028] Please refer to Figure 3 , a circular slot 411 is opened on one side of the furnace door body 41 close to the furnace wall 3. The circular slot 411 is matched with the central tube 51, and the central tube 51 is inserted into the circular slot 411.

[0029] Working principle: Before heating, the operator connects one end of the central tube 51 to the driving end of the telescopic sleeve rod 322, closes the furnace door 4, turns on the electric cylinder 321, so that the telescopic sleeve rod 322 extends to insert the other end of the central tube 51 into the circular slot 411, making the graphene substrate 5 fixed between the furnace wall 3 and the furnace door 4. The inside of the furnace body 2 is evacuated by connecting a vacuum pump to the vacuum pump interface 431, and then an inert gas is introduced through the inert gas interface 432 to protect the inside of the furnace body 2. Then a carbon source gas is introduced through the carbon source gas interface 433, and then the heating device 6 is turned on to start the reaction, so that graphene grows on the surface of the metal film 53. After the reaction is over, the operator shortens the telescopic sleeve rod 322 by controlling the electric cylinder 321, and opens the furnace door 4 parallelly to remove the prepared graphene on the graphene substrate 5.

[0030] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A high-temperature carbonization furnace for preparing graphene, comprising a bottom plate (1), a furnace body (2) is welded above the bottom plate (1), a furnace wall (3) is welded to one end of the furnace body (2), the furnace wall (3) is fixedly connected to the bottom plate (1), the furnace wall (3) comprises a furnace wall body (31), a telescopic mechanism (32) is installed on the inner side of the furnace wall body (31), a driving end of the telescopic mechanism (32) is fixedly connected to a graphene substrate (5), an end of the graphene substrate (5) away from the telescopic mechanism (32) is fixedly connected to a furnace door (4), the furnace door (4) is slidably connected to the furnace body (2), a heating device (6) is installed on the side of the furnace wall (3) close to the furnace door (4), and the characteristics are: The heating device (6) comprises a heating coil (61), the heating coil (61) being fixedly connected to a side of the furnace wall (3) close to the furnace door (4), a clamping ring (62) being installed on the outer side of the heating coil (61), the clamping ring (62) matching the heating coil (61), a heating tube (63) being installed on one end of the clamping ring (62) away from the heating coil (61), the heating tube (63) being wrapped around the outer side of the graphene substrate (5), and a plurality of rows of heating tube holes (631) being provided on the surface of the heating tube (63).

2. A high-temperature carbonization furnace for preparing graphene according to claim 1, characterized in that: The telescopic mechanism (32) comprises an electric cylinder (321), the electric cylinder (321) is fixedly connected to the inner side of the furnace wall body (31), a driving end of the electric cylinder (321) is fixedly connected to a telescopic sleeve rod (322), and the telescopic sleeve rod (322) is fixedly connected to the graphene substrate (5).

3. A high-temperature carbonization furnace for preparing graphene according to claim 2, characterized in that: The furnace door (4) comprises a furnace door body (41), an observation window (42) is installed on the side of the furnace door body (41) away from the furnace wall (3), an interface (43) is provided on the side of the furnace door body (41) away from the observation window (42), and moving wheels (44) are installed below the furnace door body (41).

4. A high-temperature carbonization furnace for preparing graphene according to claim 3, characterized in that: The interface (43) includes a vacuum pump interface (431), an inert gas interface (432) is provided on the side of the furnace door body (41) located at the vacuum pump interface (431), and a carbon source gas interface (433) is provided on the side of the inert gas interface (432) on the furnace door body (41) away from the vacuum pump interface (431).

5. The high-temperature carbonization furnace for preparing graphene according to claim 3, characterized in that: The graphene substrate (5) comprises a central tube (51), the central tube (51) matches the telescopic sleeve (322), the central tube (51) is sleeved on one end of the telescopic sleeve (322), a quartz tube (52) is sleeved on the outside of the central tube (51), and the outer surface of the quartz tube (52) is wrapped with a metal film (53).

6. A high-temperature carbonization furnace for preparing graphene according to claim 5, characterized in that: A circular slot (411) is provided on one side of the furnace door body (41) close to the furnace wall (3), and the circular slot (411) matches the central tube (51).

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