CN113603080A - Boat for preparing graphene foam film and method for preparing graphene foam film by using same - Google Patents
Boat for preparing graphene foam film and method for preparing graphene foam film by using same Download PDFInfo
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- CN113603080A CN113603080A CN202110982094.7A CN202110982094A CN113603080A CN 113603080 A CN113603080 A CN 113603080A CN 202110982094 A CN202110982094 A CN 202110982094A CN 113603080 A CN113603080 A CN 113603080A
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B32/00—Carbon; Compounds thereof
- C01B32/15—Nano-sized carbon materials
- C01B32/182—Graphene
- C01B32/184—Preparation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D5/00—Supports, screens, or the like for the charge within the furnace
Abstract
The invention provides a boat for preparing a graphene foam film, which comprises a bottom plate (4), a cover plate (1) and a fastener for fixing the bottom plate and the cover plate at a certain distance, wherein the cover plate (1) is in a plate shape with a symmetrical structure; preferably, the fastener comprises a nut, a screw, a bolt and a mortise and tenon joint. The invention also provides a method for preparing the graphene foam film by using the boat, the graphene oxide film is placed in the boat for film lamination, the fastener is locked at a set height, and then heat treatment is carried out to obtain the graphene foam film. According to the invention, by adopting a fastener structure, for example, a screw rod and a nut in a boat are combined, the self-locking function formed after screwing of the screw thread and the nut is effectively utilized, and when a foam film expands, the foaming thickness of a product can be effectively inhibited by locking the cover plate.
Description
Technical Field
The invention relates to a boat for preparing a graphene foam film and a method for preparing the graphene foam film by using the same.
Background
In the prior art, when the graphene foam film is prepared, graphene oxide is stacked and then subjected to hot pressing treatment to prepare the graphene foam film. The conventional graphene foam film is often subjected to uneven pressure in a high-temperature hot-pressing process, so that the thickness of a product is inconsistent or a structural problem is caused.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a boat for preparing a graphene foam film and a method for efficiently and stably preparing the graphene foam film by using the boat.
The invention provides a boat for preparing a graphene foam film, which comprises a bottom plate (4), a cover plate (1) and a fastener for fixing the bottom plate and the cover plate at a certain distance, wherein the cover plate (1) is in a plate shape with a symmetrical structure; preferably, the fastener comprises a nut, a screw, a bolt and a mortise and tenon joint.
Preferably, the boat is composed of a bottom plate (4), a cover plate (1), a screw rod (3) and a nut (2), wherein the edge of the cover plate (1) is provided with symmetrically distributed holes perpendicular to the plane of the cover plate, one end of the screw rod (3) is vertically and uniformly fixed on the inner surface (4) of the bottom plate, the diameter of the screw rod is consistent with the size of the hole on the cover plate (1), the position of the screw rod on the bottom plate (4) is corresponding to the hole on the cover plate (1), and the other end of the screw rod (3) can penetrate through the hole on the cover plate (1) and is fixedly connected with the nut (2) matched with the hole on the cover plate (1) in use.
Preferably, the number of said holes is at least 3.
Preferably, the screw rod (3) is provided with height scales.
The invention also provides a method for preparing the graphene foam film, which comprises the steps of putting the graphene oxide film into the boat for film lamination, locking the fasteners at the same set height, and then carrying out heat treatment to obtain the graphene foam film.
Graphite alkene foam membrane needs hot pressing when the preparation, and at heat treatment's in-process, exerts certain pressure, through with apron nut locking all around to same height, to apron four sides application of force, at the hot pressing in-process, can evenly exert pressure to the product to make product thickness and structure more stable.
Preferably, the height between the lower surface of the cover plate (1) and the upper surface of the base plate (4) is 0.93-0.95 times the height of the laminated film after the fasteners are locked.
Preferably, the specific method of the heat treatment is as follows:
when the temperature is increased from normal temperature to 300 ℃, the temperature increasing rate is 8 ℃/min;
heating from 300 deg.C to 500 deg.C at a heating rate of 2 deg.C/min for 100 min;
heating from 500 deg.C to 1000 deg.C at a heating rate of 4 deg.C/min for 125 min;
heating from 1000 deg.C to 2000 deg.C at a rate of 5 deg.C/min for 200 min;
when the temperature is increased from 2000 ℃ to the heat preservation temperature, the temperature increase rate is 3 ℃/min;
keeping the temperature for 30-60 min;
the temperature range of the heat preservation temperature is 2000-3000 ℃.
Further preferably, when the graphene oxide film is 200-300 sheets, the heat preservation temperature is uniformly increased from 2000 ℃ to 2500 ℃, and when the graphene oxide film is 300-500 sheets, the heat preservation temperature is uniformly increased from 2500 ℃ to 2900 ℃.
The uniform increase means that when the number of the graphene oxide films is 200-.
During the heat treatment, heat is transferred from the high-temperature region to the low-temperature region until the temperature is the same, and when the number of graphene oxide films is increased and the volume is increased, the required heat is increased, so that the heat preservation temperature is increased.
According to the invention, by adopting a fastener structure, for example, a screw rod and a nut in a boat are combined, the self-locking function formed after screwing of the screw thread and the nut is effectively utilized, and when a foam film expands, the foaming thickness of a product can be effectively inhibited by locking the cover plate.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
fig. 1 is a perspective view of the boat in example 1. In the figure, 1 is a cover plate, 2 is a nut, 3 is a screw rod, and 4 is a bottom plate.
Fig. 2 is a front view of the boat in accordance with embodiment 1 in a use state. In the figure, 1 is a cover plate, 2 is a nut, 3 is a screw, 4 is a bottom plate, and 5 is a pair of stacked graphene oxide films and graphite paper which are sequentially stacked.
Fig. 3 is a thickness measurement method.
Detailed Description
The following examples are given to facilitate a better understanding of the invention, but do not limit the invention. The experimental procedures in the following examples are conventional unless otherwise specified. The test materials used in the following examples were purchased from conventional biochemicals, unless otherwise specified. The quantitative tests in the following examples, all set up three replicates and the results averaged.
The boat of the present invention comprises a base plate 4, a cover plate 1, and a fastening member for fixing a distance between the base plate 4 and the cover plate 1. Fasteners include, but are not limited to, nuts, bolts, and mortise and tenon joints.
In order to ensure uniform pressure on the product, the cover plate has a plate shape with a symmetrical structure, such as a triangle, a quadrangle, a pentagon, a hexagon, an octagon, a decagon, a circle, or the like.
When nuts and screws are used as fastening members, as shown in fig. 1 and 2, the boat of the present invention is composed of a bottom plate 4, a cover plate 1, screws 3, and nuts 2, and the cover plate 1 has holes (not shown) symmetrically distributed at its edge perpendicular to the plane of the cover plate, and the number of the holes is at least 3, so that uniform pressure can be applied to the product, but the number of the holes can be increased appropriately, so that the pressure applied to the product is more uniform, preferably not more than 10, and too much, the uniformity of the pressure applied to the product is increased to a limited extent, and the cost of manufacturing the boat is increased, and the operation becomes cumbersome when in use.
One end of the screw rod 3 is vertically and uniformly fixed on the inner surface 4 of the bottom plate, the diameter of the screw rod is matched with the size of the hole on the cover plate 1, the position of the screw rod on the bottom plate 4 is corresponding to the hole on the cover plate 1, so that the other end of the screw rod 3 can penetrate through the hole on the cover plate 1 and is fixedly connected with the nut 2 matched with the hole when in use.
The screw 3 is preferably provided with a height scale so as to adjust the distance between the bottom plate 4 and the cover plate 1 to a designated distance.
The screw and nut are preferably made of isostatic graphite, and have a bulk density (g/cm)3): 1.85 or more, breaking strength (Mpa): not less than 45, compression strength (Mpa): 80 or more, the reason for selecting the material and limiting the density, the breaking strength and the compressive strength is as follows: since the heat treatment furnace temperature is 2000 to 3000 ℃, parts such as screws and nuts made of graphite are required, and the isostatic graphite having such strength needs to be selected because the graphite expands depending on the material to be fired.
When the device is used, a plurality of graphene oxide films are overlapped respectively, then the graphene oxide films are overlapped together at intervals by using graphite paper and are placed in a boat, after the films are overlapped to a certain height, all the nuts on the periphery are locked at the same set height, a heat treatment method is adopted, and in the heat treatment process, uniform pressure can be applied to a product and indirectly applied to the graphene oxide film in the product, so that foaming is inhibited, and the thickness and the structure of the product are stably controlled.
After the nut is locked, the height between the lower surface of the cover plate and the upper surface of the bottom plate is 0.93-0.95 times of the height of the laminated film, and the heating expansion in the heat treatment process can be well inhibited by the multiplying power, so that the prepared graphene foam film reaches the required thickness.
The invention does not require the number of graphene oxide films used in one heat treatment in principle, and the number is limited by the height of the graphite screw. The graphene oxide film is preferably used at one time, and the graphene oxide film is not less than 200 sheets, so that waste of heat energy during heat treatment is caused. The graphene oxide film used once is preferably not higher than 500 sheets, and is excessively high in temperature during heat treatment, consumes excessive heat energy, and is not high in cost performance.
The heat treatment method comprises the following steps:
when the temperature is increased from normal temperature to 300 ℃, the temperature increasing rate is 8 ℃/min;
heating from 300 deg.C to 500 deg.C at a heating rate of 2 deg.C/min for 100 min;
heating from 500 deg.C to 1000 deg.C at a heating rate of 4 deg.C/min for 125 min;
heating from 1000 deg.C to 2000 deg.C at a rate of 5 deg.C/min for 200 min;
when the temperature is increased from 2000 ℃ to the heat preservation temperature, the temperature increase rate is 3 ℃/min;
keeping the temperature for 30-60 min;
the temperature range of the heat preservation temperature is 2000-3000 ℃.
When the graphene oxide film is 200-300 pieces, the heat preservation temperature is uniformly increased to 2500 ℃ from 2000 ℃, and when the graphene oxide film is 300-500 pieces, the heat preservation temperature is uniformly increased to 2900 ℃ from 2500 ℃.
The uniform increase means that when the number of the graphene oxide films is 200-.
According to the heat treatment method disclosed by the invention, when the number of graphene oxide membranes is different, the same heating rate is used for each program, only the heat preservation temperature is adjusted, and the time for heating to the heat preservation temperature is adjusted.
The heating rate in the heat treatment process can influence the foaming expansion condition, and the highest heat treatment temperature can influence the heat diffusion of the product.
In the present invention, the thickness is measured using a micrometer caliper, the density is measured using a drainage method, and the thermal diffusion is performed using a relaxation-resistant LFA 467.
The thickness was measured as follows: the same boat was sampled, one above, one in the next, and each was tested at 5 points: taking one point at each of four corners, taking one point at the center, specifically sampling as shown in FIG. 3, and calculating the average value to calculate the thickness.
Example 1
As shown in fig. 1 and 2, the boat of this embodiment is composed of a bottom plate 4, a cover plate 1, a screw 3 and a nut 2, wherein the edge of the cover plate 1 has 10 symmetrically distributed holes perpendicular to the plane of the cover plate, and the cover plate 1 is a symmetrical quadrangle with arc-shaped corners. One end of the screw rod 3 is vertically and uniformly fixed on the inner surface 4 of the bottom plate, the diameter of the screw rod is matched with the size of the hole on the cover plate 1, the position of the screw rod on the bottom plate 4 is corresponding to the hole on the cover plate 1, so that the other end of the screw rod 3 can penetrate through the hole on the cover plate 1 and is fixedly connected with the nut 2 matched with the hole when in use. The screw rod 3 is provided with height scales.
The screw and the nut are made of isostatic pressing graphite and have volume density (g/cm)3): 1.85 or more, breaking strength (Mpa): not less than 45, compression strength (Mpa): not less than 80.
Fig. 1 is a perspective view of the boat in example 1.
Fig. 2 is a front view of the boat in example 1 in a state of use (i.e., after the graphene oxide film and graphite paper are added to the boat).
When the graphene oxide boat is used, the oppositely-overlapped graphene oxide films and the graphite paper are sequentially overlapped and placed in the boat, the size of the overlapped graphene oxide films is equal to or slightly smaller than that of the graphite paper (slightly smaller than that of the graphite paper which is conveniently placed in the boat, for example, the difference between the two graphite paper is 1mm), the graphite paper is preferably close to screws at two ends in the boat, and therefore the graphene oxide films and the graphite paper are combined and distributed in the inner space of the boat, and the inner space of the boat can be utilized to the maximum extent. The combined structure of the graphene oxide film and the graphite paper is shown as 5 in fig. 2, and 5 in fig. 2 shows that the graphene oxide film and the graphite paper are stacked in this order.
Example 2
The graphene oxide film is prepared into a graphene foam film by a hot pressing method, and the specific method is as follows:
the method comprises the following steps: respectively stacking 200 graphene oxide films, then respectively stacking the graphene oxide films into the boat of the embodiment 1 at intervals by using graphite paper, stacking the graphene oxide films with the thickness of 0.4mm and the graphite paper with the thickness of 0.3mm to the height of 220mm (+ -5 mm), applying pressure to lock the nuts at the four corners of the boat to the positions of 205mm (+ -5 mm), setting the heat treatment temperature to 2000 ℃, and obtaining the graphene foam film by heating specific parameters as shown in table 1 (the normal temperature is 20 ℃ in table 1). The test data of the obtained graphene foam film are shown in table 2.
The prior art method comprises the following steps: respectively stacking 200 graphene oxide films in pairs, then respectively stacking the graphene oxide films together with graphite paper at intervals, placing the graphene oxide films into a boat, stacking the 0.4mm graphene oxide films and the 0.3mm graphite paper to a height of 220mm (+ -5 mm), applying 40kg of cover plate above the graphene oxide films, setting the weight of a single cover plate to be 10 +/-1 kg (pressure is calculated to be 0.2kg/pcs), setting the heat treatment temperature to be 2000 ℃, and obtaining the graphene foam film by heating specific parameters according to the following table 1. The test data of the obtained graphene foam film are shown in table 2.
In the sample with the same number selected in the two heat treatment methods, for example, sample 1, the graphene oxide film is produced in the same batch, and the graphite paper is also produced in the same batch. The samples in the following examples were selected according to this method.
TABLE 1 Heat treatment temperature
| Temperature/. degree.C | Temperature rise Rate/. degree.C./min | Time/min | Temperature preservation/min |
| Normal temperature-300 | 8 | 35 | / |
| 300-500 | 2 | 100 | / |
| 500-1000 | 4 | 125 | / |
| 1000-2000 | 5 | 200 | / |
| 2000 keep warm | / | / | 30 |
Table 2 test data for graphene foam films
Example 3
The graphene oxide film is prepared into a graphene foam film by a hot pressing method, and the specific method is as follows:
the method comprises the following steps: 300 graphene oxide films are respectively overlapped, then are respectively overlapped by graphite paper at intervals and are overlapped together, the graphene oxide films with the thickness of 0.4mm are overlapped with the graphite paper with the thickness of 335mm (+ -5 mm), the nuts at the four corners of the boat are locked at the position of 315mm (+ -5 mm) by applying pressure, the heat treatment temperature is set to be 2500 ℃, the heating is specifically required to be carried out at the normal temperature of 20 ℃ in the table 3, and the graphene foam film is obtained. The test data of the obtained graphene foam film are shown in table 4.
The prior art method comprises the following steps: respectively stacking 300 graphene oxide films in pairs, then respectively stacking the graphene oxide films together with graphite paper at intervals, putting the graphene oxide films into a boat, stacking the 0.4mm graphene oxide films on the 0.3mm graphite paper to a height of 335mm (+ -5 mm), applying 60kg of cover plate above the graphene oxide films, setting the weight of a single cover plate to be 10 +/-1 kg (the pressure is calculated to be 0.2kg/pcs), setting the heat treatment temperature to be 2500 ℃, and heating the graphene oxide films according to specific requirements shown in Table 3 to obtain the graphene foam film. The test data of the obtained graphene foam film are shown in table 4.
TABLE 3 Heat treatment temperature
| Temperature/. degree.C | Temperature rise Rate/. degree.C./min | Time/min | Temperature preservation/min |
| Normal temperature-300 | 8 | 35 | / |
| 300-500 | 2 | 100 | / |
| 500-1000 | 4 | 125 | / |
| 1000-2000 | 5 | 200 | / |
| 2000-2500 | 3 | 167 | / |
| 2500 heat preservation | / | / | 30 |
Table 4 test data for graphene foam films
Example 4
The graphene oxide film is prepared into a graphene foam film by a hot pressing method, and the specific method is as follows:
the method comprises the following steps: respectively stacking 400 graphene oxide films in pairs, then respectively stacking the graphene oxide films together with graphite paper at intervals, and placing the graphene oxide films into the boat in the embodiment 1 of the invention, stacking the 0.4mm graphene oxide films on 0.3mm graphite paper to be 440mm (+ -5 mm) high, locking the nuts at the four corners of the boat at positions of 410mm (+ -5 mm), setting the heat treatment temperature at 2700 ℃, and heating to obtain the graphene foam film specifically according to the requirement of table 5 (the normal temperature is 20 ℃ in table 5). The test data of the obtained graphene foam film are shown in table 6.
The prior art method comprises the following steps: respectively stacking 400 graphene oxide films in pairs, then respectively stacking the graphene oxide films together with graphite paper at intervals, putting the graphene oxide films into a boat, stacking the graphene oxide films with 0.4mm with the graphite paper with the thickness of 0.3mm to the height of 440mm (+ -5 mm), applying 80kg of cover plate above the graphene oxide films, setting the heat treatment temperature to 2700 ℃, and heating the graphene foam films according to the specific requirements shown in Table 5 to obtain the graphene foam films. The test data of the obtained graphene foam film are shown in table 6.
TABLE 5 Heat treatment temperature
| Temperature/. degree.C | Temperature rise Rate/. degree.C./min | Time/min | Temperature preservation/min |
| Normal temperature-300 | 8 | 35 | / |
| 300-500 | 2 | 100 | / |
| 500-1000 | 4 | 125 | / |
| 1000-2000 | 5 | 200 | / |
| 2000-2700 | 3 | 233 | / |
| 2700 heat preservation | / | / | 30 |
Table 6 test data for graphene foam films
Example 5
The graphene oxide film is prepared into a graphene foam film by a hot pressing method, and the specific method is as follows:
the method comprises the following steps: respectively stacking 500 graphene oxide films, then respectively stacking the graphene oxide films at intervals by using graphite paper, stacking the graphene oxide films and the graphite paper into the boat in the embodiment 1 of the invention, stacking the graphene oxide films with the thickness of 0.4mm and the graphite paper with the thickness of 550mm (+ -5 mm), locking nuts at four corners of the boat to 515mm (+ -5 mm), setting the heat treatment temperature to 2900 ℃, and heating the graphene foam films according to the specific requirements of table 7 (the normal temperature is 20 ℃ in table 7) to obtain the graphene foam films. The test data of the obtained graphene foam film are shown in table 8.
The prior art method comprises the following steps: respectively stacking 500 graphene oxide films in pairs, then respectively stacking the graphene oxide films together with graphite paper at intervals, putting the graphene oxide films into a boat, stacking the graphene oxide films with 0.4mm with the graphite paper with the thickness of 0.3mm to the height of 550mm (+ -5 mm), applying 100kg of cover plate above the graphene oxide films, setting the weight of a single cover plate to be 10 +/-1 kg (the pressure is calculated to be 0.2kg/pcs), setting the heat treatment temperature to be 2900 ℃, and heating the graphene foam film according to the specific requirements shown in the table 7 to obtain the graphene foam film. The test data of the obtained graphene foam film are shown in table 8.
TABLE 7 Heat treatment temperature
| Temperature/. degree.C | Temperature rise Rate/. degree.C./min | Time/min | Temperature preservation/min |
| Normal temperature-300 | 8 | 35 | / |
| 300-500 | 2 | 100 | / |
| 500-1000 | 4 | 125 | / |
| 1000-2000 | 5 | 200 | / |
| 2000-2900 | 3 | 300 | / |
| 2900 thermal insulation | / | / | 60 |
Table 8 test data for graphene foam films
Comparative experiment
Because the heating rate in the heat treatment process can influence the foaming expansion condition, the invention carries out comparative analysis on the new and old 2 heat treatment methods, and the test steps are as follows:
1. in each experimental group, 300 graphene oxide films and a corresponding amount of graphite paper were taken, a boat was assembled according to the structure of example 1, and then the graphene oxide films and the graphite paper were fixed by the boat according to the method in example 3, and the temperature was maintained at 2500 ℃.
2. The process conditions are as follows:
the new heat treatment method is the heat treatment method of example 3 of the present invention.
The old heat treatment method comprises the following steps:
when the temperature is increased from normal temperature to 300 ℃, the temperature increasing rate is 8 ℃/min;
heating from 300 deg.C to 1000 deg.C at a heating rate of 4 deg.C/min for 175 min;
when the temperature is increased from 1000 ℃ to 2000 ℃, the heating rate is 8 ℃/min, and the time is 125 min;
when the temperature is increased from 2000 ℃ to the heat preservation temperature, the temperature increase rate is 4 ℃/min;
keeping the temperature for 30-60 min.
3. Data and analysis
TABLE 9
And (3) analysis: after heat treatment at 2500 ℃, the thermal diffusion is basically approximate, and according to analysis of different heating rates, the higher the rate is, the higher the foam film thickness is, the lower the density is, and the foaming expansion seriously influences the appearance.
4. Conclusion
The heating rate in the heat treatment process can influence the foaming expansion condition, and the higher the heating rate is, the more obvious the foaming expansion is, and the appearance is influenced, so the heat treatment method of the invention is selected to reduce the original rate.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A method for preparing a graphene foam film, comprising: placing the graphene oxide film into a boat for film lamination, locking the fasteners at the same set height, and then carrying out heat treatment to obtain a graphene foam film; the boat comprises a bottom plate (4), a cover plate (1) and a fastener for fixing the bottom plate and the cover plate at a certain distance, wherein the cover plate (1) is in a plate shape with a symmetrical structure; preferably, the fastener comprises a nut, a screw, a bolt and a mortise and tenon joint.
2. The method of claim 1, wherein the graphene foam film is prepared by: after the fastener is locked, the height between the lower surface of the cover plate (1) and the upper surface of the bottom plate (4) is 0.93-0.95 times of the height of the laminated film.
3. The method of preparing a graphene foam film according to claim 1 or 2, wherein: the specific method of the heat treatment comprises the following steps:
when the temperature is increased from normal temperature to 300 ℃, the temperature increasing rate is 8 ℃/min;
heating from 300 deg.C to 500 deg.C at a heating rate of 2 deg.C/min for 100 min;
heating from 500 deg.C to 1000 deg.C at a heating rate of 4 deg.C/min for 125 min;
heating from 1000 deg.C to 2000 deg.C at a rate of 5 deg.C/min for 200 min;
when the temperature is increased from 2000 ℃ to the heat preservation temperature, the temperature increase rate is 3 ℃/min;
keeping the temperature for 30-60 min;
the temperature range of the heat preservation temperature is 2000-3000 ℃.
4. The method of claim 3, wherein the graphene foam film is prepared by the following steps: when the graphene oxide film is 200-300 pieces, the heat preservation temperature is uniformly increased to 2500 ℃ from 2000 ℃, and when the graphene oxide film is 300-500 pieces, the heat preservation temperature is uniformly increased to 2900 ℃ from 2500 ℃.
5. The method for preparing a graphene foam film according to any one of claims 1 to 4, wherein: the boat is composed of a bottom plate (4), a cover plate (1), a screw rod (3) and a nut (2), wherein holes which are symmetrically distributed and perpendicular to the plane of the cover plate are formed in the edge of the cover plate (1), one end of the screw rod (3) is vertically and uniformly fixed on the inner surface (4) of the bottom plate, the diameter of the screw rod is consistent with the size of the hole in the cover plate (1), the position of the screw rod on the bottom plate (4) is corresponding to the hole in the cover plate (1), and the other end of the screw rod (3) can penetrate through the hole in the cover plate (1) and is fixedly connected with the nut (2) which is matched with the hole in use.
6. The method of claim 5, wherein: the number of the holes is at least 3.
7. The method of claim 5, wherein: the screw rod (3) is provided with height scales.
8. A boat for preparing graphite alkene foam film, its characterized in that: the boat comprises a bottom plate (4), a cover plate (1) and a fastener for fixing the bottom plate and the cover plate at a certain distance, wherein the cover plate (1) is in a plate shape with a symmetrical structure; preferably, the fastener comprises a nut, a screw, a bolt and a mortise and tenon joint.
9. The boat for manufacturing a graphene foam film according to claim 8, wherein: the boat is composed of a bottom plate (4), a cover plate (1), a screw rod (3) and a nut (2), wherein holes which are symmetrically distributed and perpendicular to the plane of the cover plate are formed in the edge of the cover plate (1), one end of the screw rod (3) is vertically and uniformly fixed on the inner surface (4) of the bottom plate, the diameter of the screw rod is consistent with the size of the hole in the cover plate (1), the position of the screw rod on the bottom plate (4) is corresponding to the hole in the cover plate (1), and the other end of the screw rod (3) can penetrate through the hole in the cover plate (1) and is fixedly connected with the nut (2) which is matched with the hole in use.
10. The boat for manufacturing a graphene foam film according to claim 9, wherein: the number of the holes is at least 3; and/or
The screw rod (3) is provided with height scales.
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| CN203768035U (en) * | 2014-04-11 | 2014-08-13 | 江苏悦达新材料科技有限公司 | Graphite boat used for producing radiating films |
| CN109694055A (en) * | 2018-12-28 | 2019-04-30 | 常州富烯科技股份有限公司 | High-density graphite alkene foam film and preparation method thereof |
| US20200339423A1 (en) * | 2019-04-29 | 2020-10-29 | Nanotek Instruments, Inc. | Oriented graphene sheet-enhanced vapor-based heat transfer device and process for producing same |
| CN111422856A (en) * | 2020-04-03 | 2020-07-17 | 常州富烯科技股份有限公司 | Method for flame reduction of graphene oxide film and preparation method of graphene film |
| CN112850697A (en) * | 2021-02-04 | 2021-05-28 | 常州富烯科技股份有限公司 | Preparation method of high-density graphene heat-conducting film |
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