A high temperature graphene heating plate and preparation method thereof

Abstract

The present application discloses a high-temperature graphene heating plate and a preparation method thereof, which relates to the field of graphene heating technology, and comprises a base layer, a graphene layer is arranged on one side of the base layer, an electrode is arranged between the base layer and the graphene layer, the electrode is arranged in a groove opened on the side of the base layer close to the graphene layer, and the electrode is flush with the surface of one side of the base layer. In this way, the problem of electrode stability in a high-temperature environment is solved, and the stability and use effect of the electrode in a high-temperature environment are improved. The prepared graphene heating flat plate product has excellent heating performance and long life, and can meet the needs of the high-temperature heating field.

Description

Technical Field

[0001] The present application relates to the field of graphene heating technology, and in particular to a high-temperature graphene heating plate and a preparation method thereof. Background Art

[0002] With the continuous advancement of science and technology, graphene has shown great application potential in the field of high-temperature heating due to its excellent electrical and thermal conductivity. Especially in situations where uniform and rapid heating is required, graphene heating plates have become an ideal choice. However, high-temperature environments place extremely high demands on the stability of electrodes. Therefore, developing a method for preparing pre-set electrodes that can maintain stability and efficiency at high temperatures is of great significance for improving the performance of graphene heating plates. Summary of the invention

[0003] In order to solve the problem of electrode stability in a high temperature environment and meet the needs in the field of high temperature heating, the present application provides a high temperature graphene heating plate and a preparation method thereof.

[0004] The present application provides a high-temperature graphene heating plate and a preparation method thereof using the following technical solutions.

[0005] A high-temperature graphene heating plate comprises a base layer, a graphene layer is arranged on one side of the base layer, an electrode is arranged between the base layer and the graphene layer, the electrode is arranged in a groove opened on one side of the base layer close to the graphene layer, and the electrode is flush with a surface of one side of the base layer.

[0006] By adopting the above technical solution, grooves are opened on the surface of the base layer to facilitate the embedding of the electrode, so that the electrode material and the base layer are on the same horizontal plane. The embedded or encapsulated pre-set electrode method makes the contact between the electrode and the graphene layer closer and more uniform, which can greatly enhance the heating effect.

[0007] Optionally, an anti-oxidation layer is provided on the surface of the heating plate.

[0008] By adopting the above technical solution, setting the anti-oxidation layer, and encapsulating to achieve surface flatness, the electrode has higher durability and stability, thereby extending the service life of the graphene heating plate.

[0009] Optionally, a graphene layer is provided on both the upper surface and the lower surface of the base layer, and there are two electrodes corresponding to the graphene layer.

[0010] By adopting the above technical solution, electrodes are embedded in both the upper surface and the lower surface of the base layer to form an embedded double-sided electrode structure to form a heating plate.

[0011] Optionally, the two grooves corresponding to the graphene layer are symmetrically arranged at the edge of the base layer.

[0012] By adopting the above technical solution and providing a groove at the edge of the base layer, the electrode is embedded at the edge of the base layer to form an embedded electrode structure and form a heating plate.

[0013] A method for preparing the high temperature graphene heating plate as described above comprises the following steps:

[0014] Step 1: Base layer pre-processing:

[0015] Processing corresponding grooves on the surface of the base layer according to the size of the electrode;

[0016] Step 2: Electrode embedding:

[0017] Embed the electrode into the groove of the base layer for fixed connection;

[0018] Step 3: Surface shaping:

[0019] Shaping to make the electrode and the substrate surface at the same level;

[0020] Step 4: Vacuum magnetron sputtering and hanging graphene coating:

[0021] Graphene is deposited on the surface of a base layer using a vacuum magnetron sputtering device to form a graphene layer, thereby producing a graphene heating plate.

[0022] Optionally, after a corresponding groove is machined on the surface of the base layer according to the size of the electrode, plasma thermal spraying or cold spraying is used to spray the area inside the groove of the base layer to form an electrode base.

[0023] By adopting the above technical solution and spraying the electrode substrate, it is convenient to embed the electrode into the groove by welding or hot casting.

[0024] Optional, step three, surface shaping, grinding and polishing: Grind the embedded electrode to make it flat and keep it at the same level as the base plane.

[0025] Optional, step 4, vacuum degree is controlled at 1.0x10 -2 pa to 4.0x10 -4 The sputtering power supply is controlled within 10 to 20KW.

[0026] Optionally, step five, magnetron sputtering or magnetron sputtering evaporation integrated machine is used to coat the anti-oxidation layer: a vacuum magnetron sputtering or magnetron sputtering evaporation integrated machine is used to coat the anti-oxidation layer on the entire surface of the graphene heating plate.

[0027] In summary, this application at least includes the following beneficial effects:

[0028] By adopting the electrode manufacturing method of the present invention, electrode materials suitable for high temperature environments are selected and the electrode design is optimized, so that the high temperature stability of the flat heating product can be improved; the embedded or embedded pre-set electrode method makes the contact between the electrode and the graphene layer more compact and uniform, which can greatly enhance the heating effect. At the same time, the electrode material and the base layer are on the same horizontal plane, and the surface is flat after packaging, so that the electrode has higher durability and stability, thereby extending the service life of the graphene heating plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0030] Figure 1 It is a structural schematic diagram of a high-temperature graphene heating plate in Example 1.

[0031] Figure 2 It is a structural schematic diagram of a high-temperature graphene heating plate in Example 2.

[0032] Figure 3 It is a structural schematic diagram of a high-temperature graphene heating plate in Example 3.

[0033] Figure 4 It is a process flow chart of a method for preparing a high-temperature graphene heating plate in Example 1, Example 2, and Example 3.

[0034] Explanation of the accompanying drawings: 1. base layer; 2. electrode; 3. graphene layer; 4. anti-oxidation layer. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] The following is combined with Figures 1 to 4 This application is described in further detail.

[0037] The embodiments of the present application disclose a high-temperature graphene heating plate and a method for preparing the same.

[0038] Example 1: Reference Figure 1 , a high temperature graphene heating plate, comprising:

[0039] The base layer 1 is made of one of ordinary glass, quartz, aluminum oxide, boron nitride, yttrium zirconium oxide and silicon carbide glass.

[0040] A graphene layer 3 is arranged on the upper surface of the base layer 1, and two electrodes 2 are arranged between the base layer 1 and the graphene layer 3. The cross section of the electrode 2 is rectangular. The two electrodes 2 are respectively arranged in two grooves opened on the upper surface of the base layer 1, and the upper surface of the electrode 2 is flush with the upper surface of the base layer 1. The electrode 2 is embedded in the upper surface of the base layer 1 to form an embedded single-sided electrode 2 structure to form a graphene heating plate. The electrode 2 is made of tungsten, molybdenum, copper, zirconium, titanium, rhenium, iron-chromium-aluminum or two alloy materials thereof. The thickness of the electrode 2 is 1 to 500um and the width is 2mm to 12mm. The specifications of the electrode 2 can be set according to the product's overcurrent, power, temperature and other requirements.

[0041] An anti-oxidation layer 4 is provided on the entire surface of the graphene heating plate. The anti-oxidation layer 4 is made of aluminum oxide, hexagonal boron nitride or aluminum silicate. The thickness of the anti-oxidation layer 4 is 28nm to 1000nm, thereby obtaining the high-temperature graphene heating plate of the present application.

[0042] Reference Figure 1 , 4 , a method for preparing the high temperature graphene heating plate as described above, comprising the following steps:

[0043] Step 1: Pre-processing of base layer 1:

[0044] Milling a corresponding groove on the surface of the base layer 1 according to the size of the electrode 2;

[0045] After the corresponding grooves are machined on the surface of the base layer according to the electrode size, plasma thermal spraying or cold spraying is used to spray the area inside the base layer groove to form an electrode base, and the electrode base material is the same as the electrode material.

[0046] Plasma thermal spraying: Use plasma thermal spraying equipment to spray the electrode base material in the groove area of ​​the base layer 1. The electrode base thickness is 50 to 500 nm. The electrode base material includes tungsten, molybdenum, copper, zirconium, titanium, rhenium, iron chromium aluminum or two of the alloy materials.

[0047] Cold spraying: using cold spraying equipment to spray the electrode substrate material in the groove area of ​​the base layer 1, the electrode substrate thickness is 50 to 500nm, and the electrode substrate material contains tungsten, molybdenum, copper, zirconium, titanium, rhenium, iron chromium aluminum or two of the alloy materials.

[0048] By spraying the electrode substrate, it is easy to embed the electrode into the groove by welding or hot casting.

[0049] Step 2: embedding the electrode 2: embedding the electrode into the groove of the base layer to fix the connection;

[0050] The electrode 2 is welded with lead and the electrode is welded into the groove of the base layer 1 sprayed with the base material. The electrode 2 can also be embedded by hot casting or pressing.

[0051] Step 3: Surface shaping: shaping the electrode and the substrate surface to be at the same level;

[0052] The embedded electrode 2 is ground and polished by a grinder to be flat, and kept at the same level as the plane of the base layer 1, and a blank is formed after grinding and polishing.

[0053] Step 4: Vacuum magnetron sputtering and hanging coating of graphene:

[0054] The blank is fixed on the vacuum magnetron sputtering equipment using a fixture, and the vacuum degree is controlled at 1.0x10 -2 pa to 4.0x10 -4 pa, the sputtering power supply power is controlled within 10 to 20KW, and the deposition thickness can be adjusted according to the requirements. Graphene is deposited on the surface of the blank to form a graphene layer to obtain a graphene heating plate. In this process, by precisely controlling the sputtering parameters, it is ensured that the graphene layer 3 is evenly and tightly covered on the surface of the blank to form a graphene heating plate.

[0055] Step 5: magnetron sputtering or magnetron sputtering evaporation integrated machine to coat the anti-oxidation layer 4:

[0056] Use vacuum magnetron sputtering or magnetron sputtering evaporation integrated machine to coat the anti-oxidation layer 4 on the entire surface of the graphene heating plate, and the vacuum degree is controlled at 1.0x10 -2 pa to 4.0x10 -4 pa, the sputtering power supply is controlled at 10 to 20KW, and the deposition thickness can be adjusted according to the requirements; the high-temperature graphene heating plate is completed.

[0057] After the preparation is completed, the product undergoes necessary post-processing, such as vacuum packaging, to ensure the product is safe during transportation and storage.

[0058] Test of the high temperature graphene heating plate:

[0059] (1) Conductivity test:

[0060] DC resistance: Tested with a DC resistance instrument, the test data is 100 to 500mΩ;

[0061] Square resistance: tested with ST2253 four-probe square resistance meter, test data <20mΩ;

[0062] (2) Anti-oxidation test: The product can maintain effective use time of more than 5000 hours in high temperature environment within 1000℃;

[0063] (3) High temperature resistance test: Use a high temperature resistance tester to test the product, the temperature resistance is within 1000℃;

[0064] (4) Insulation test: Use an insulation withstand voltage tester to test the product insulation data from 3 to 3.6KV.

[0065] A groove is provided on the surface of the base layer 1 to facilitate the embedding of the electrode 2. The embedded or encapsulated pre-set electrode 2 makes the contact between the electrode 2 and the graphene layer 3 closer and more uniform, which can greatly enhance the heating effect and facilitate the electrode 2 material and the base layer 1 to be at the same level. The surface is flat after the encapsulation is completed, so that the electrode 2 has higher durability and stability, thereby extending the service life of the graphene heating plate.

[0066] Example 2: Reference Figure 2 , a high temperature graphene heating plate, comprising:

[0067] The base layer 1 is made of one of ordinary glass, quartz, aluminum oxide, boron nitride, yttrium zirconium oxide and silicon carbide glass.

[0068] A graphene layer 3 is provided on both the upper and lower surfaces of the base layer 1, and two electrodes 2 are provided between the base layer 1 and the graphene layer 3. The cross section of the electrode 2 is rectangular, and the two electrodes 2 are respectively provided in two grooves provided on the surface of the base layer 1, and the surface of the electrode 2 is flush with the surface of the base layer 1. The electrode 2 is embedded in the surface of the base layer 1 to form an embedded double-sided electrode 2 structure, thereby forming a graphene heating plate.

[0069] The material of electrode 2 is tungsten, molybdenum, copper, zirconium, titanium, rhenium, iron-chromium-aluminum or two alloy materials thereof. The thickness of electrode 2 is 1 to 500um and the width is 2mm to 12mm. The specifications of electrode 2 can be set according to the product's overcurrent, power, temperature and other requirements.

[0070] An anti-oxidation layer 4 is provided on the entire surface of the graphene heating plate. The anti-oxidation layer 4 is made of aluminum oxide, hexagonal boron nitride or aluminum silicate. The thickness of the anti-oxidation layer 4 is 28nm to 1000nm, thereby obtaining the high-temperature graphene heating plate of the present application.

[0071] Reference Figure 2 , 4 , a method for preparing the high temperature graphene heating plate as described above, comprising the following steps:

[0072] Step 1: Pre-processing of base layer 1:

[0073] Milling a corresponding groove on the surface of the base layer 1 according to the size of the electrode 2;

[0074] After the corresponding grooves are machined on the surface of the base layer according to the electrode size, plasma thermal spraying or cold spraying is used to spray the area inside the base layer groove to form an electrode base, and the electrode base material is the same as the electrode material.

[0075] Plasma thermal spraying: Use plasma thermal spraying equipment to spray the electrode base material in the groove area of ​​the base layer 1. The electrode base thickness is 50 to 500 nm. The electrode base material includes tungsten, molybdenum, copper, zirconium, titanium, rhenium, iron chromium aluminum or two of the alloy materials.

[0076] Cold spraying: using cold spraying equipment to spray the electrode substrate material in the groove area of ​​the base layer 1, the electrode substrate thickness is 50 to 500nm, and the electrode substrate material contains tungsten, molybdenum, copper, zirconium, titanium, rhenium, iron chromium aluminum or two of the alloy materials.

[0077] By spraying the electrode substrate, it is easy to embed the electrode into the groove by welding or hot casting.

[0078] Step 2: embedding the electrode 2: embedding the electrode into the groove of the base layer 1 to fix the connection;

[0079] The electrode 2 is welded with lead and the electrode is welded into the groove of the base layer 1 sprayed with the base material. The electrode 2 can also be embedded by hot casting or pressing.

[0080] Step 3: Surface shaping: shaping the electrode and the substrate surface to be at the same level;

[0081] The embedded electrode 2 is ground and polished by a grinder to be flat, and kept at the same level as the plane of the base layer 1, and a blank is formed after grinding and polishing.

[0082] Step 4: Vacuum magnetron sputtering and hanging graphene coating:

[0083] The blank is fixed on the vacuum magnetron sputtering equipment using a fixture, and the vacuum degree is controlled at 1.0x10 -2 pa to 4.0x10 -4 pa, the sputtering power supply power is controlled within 10 to 20KW, and the deposition thickness can be adjusted according to the requirements. Graphene is deposited on the surface of the blank to form a graphene layer to obtain a graphene heating plate. In this process, by precisely controlling the sputtering parameters, it is ensured that the graphene layer 3 is evenly and tightly covered on the surface of the blank to form a graphene heating plate.

[0084] Step 5: magnetron sputtering or magnetron sputtering evaporation integrated machine to coat the anti-oxidation layer 4:

[0085] Use vacuum magnetron sputtering or magnetron sputtering evaporation integrated machine to coat the anti-oxidation layer 4 on the entire surface of the graphene heating plate, and the vacuum degree is controlled at 1.0x10 -2 pa to 4.0x10 -4pa, the sputtering power supply is controlled at 10 to 20KW, and the deposition thickness can be adjusted according to the requirements; the high-temperature graphene heating plate is completed.

[0086] After the preparation is completed, the product undergoes necessary post-processing, such as vacuum packaging, to ensure the product is safe during transportation and storage.

[0087] Tests of the heating plate:

[0088] (1) Conductivity test:

[0089] DC resistance: Tested with a DC resistance instrument, the test data is 100 to 500mΩ;

[0090] Square resistance: tested with ST2253 four-probe square resistance meter, test data <20mΩ;

[0091] (2) Anti-oxidation test: The product can maintain effective use time of more than 5000 hours in high temperature environment within 1000℃;

[0092] (3) High temperature resistance test: Use a high temperature resistance tester to test the product, the temperature resistance is within 1000℃;

[0093] (4) Insulation test: Use an insulation withstand voltage tester to test the product insulation data from 3 to 3.6KV.

[0094] A groove is provided on the surface of the base layer 1 to facilitate the embedding of the electrode 2. The embedded or encapsulated pre-set electrode 2 makes the contact between the electrode 2 and the graphene layer 3 closer and more uniform, which can greatly enhance the heating effect and facilitate the electrode 2 material and the base layer 1 to be at the same level. The surface is flat after the encapsulation is completed, so that the electrode 2 has higher durability and stability, thereby extending the service life of the graphene heating plate.

[0095] Example 3: Reference Figure 3 , a high temperature graphene heating plate, comprising:

[0096] The base layer 1 is made of one of ordinary glass, quartz, aluminum oxide, boron nitride, yttrium zirconium oxide and silicon carbide glass.

[0097] Graphene layers 3 are provided on the upper and lower surfaces of the base layer 1, and electrodes 2 are provided between the edge of the base layer 1 and the graphene layers 3 on the upper and lower surfaces. The cross section of the electrode 2 is concave, and the two electrodes 2 are respectively provided in two grooves provided at the edge of the base layer 1, and the upper and lower surfaces of the electrode 2 are flush with the surface of the base layer 1. The electrode 2 is embedded in the edge of the base layer 1 to form an embedded electrode 2 structure, forming a graphene heating plate. The electrode 2 is made of tungsten, molybdenum, copper, zirconium, titanium, rhenium, iron-chromium-aluminum or two of these alloy materials. The thickness of the electrode 2 is 1 to 500um and the width is 2mm to 12mm. The specifications of the electrode 2 can be set according to the product's overcurrent, power, temperature and other requirements.

[0098] An anti-oxidation layer 4 is provided on the entire surface of the graphene heating plate. The anti-oxidation layer 4 is made of aluminum oxide, hexagonal boron nitride or aluminum silicate. The thickness of the anti-oxidation layer 4 is 28nm to 1000nm, thereby obtaining the high-temperature graphene heating plate of the present application.

[0099] Reference Figure 3 , 4 , a method for preparing the high temperature graphene heating plate as described above, comprising the following steps:

[0100] Step 1: Pre-processing of base layer 1:

[0101] Milling a corresponding groove on the surface of the base layer 1 according to the size of the electrode 2;

[0102] After the corresponding grooves are machined on the surface of the base layer according to the electrode size, plasma thermal spraying or cold spraying is used to spray the area inside the base layer groove to form an electrode base, and the electrode base material is the same as the electrode material.

[0103] Plasma thermal spraying: Use plasma thermal spraying equipment to spray the electrode base material in the groove area of ​​the base layer 1. The electrode base thickness is 50 to 500 nm. The electrode base material includes tungsten, molybdenum, copper, zirconium, titanium, rhenium, iron chromium aluminum or two of the alloy materials.

[0104] Cold spraying: using cold spraying equipment to spray the electrode substrate material in the groove area of ​​the base layer 1, the electrode substrate thickness is 50 to 500nm, and the electrode substrate material contains tungsten, molybdenum, copper, zirconium, titanium, rhenium, iron chromium aluminum or two of the alloy materials.

[0105] By spraying the electrode substrate, it is easy to embed the electrode into the groove by welding or hot casting.

[0106] Step 2: embedding the electrode 2: embedding the electrode into the groove of the base layer 1 to fix the connection;

[0107] The electrode 2 is welded with lead and the electrode is welded into the groove of the base layer 1 sprayed with the base material. The electrode 2 can also be embedded by hot casting or pressing.

[0108] Step 3: Surface shaping: shaping the electrode and the substrate surface to be at the same level;

[0109] The embedded electrode 2 is ground and polished by a grinder to be flat, and kept at the same level as the plane of the base layer 1, and a blank is formed after grinding and polishing.

[0110] Step 4: Vacuum magnetron sputtering and hanging graphene coating:

[0111] The blank is fixed on the vacuum magnetron sputtering equipment using a fixture, and the vacuum degree is controlled at 1.0x10 -2 pa to 4.0x10 -4 pa, the sputtering power supply power is controlled within 10 to 20KW, and the deposition thickness can be adjusted according to the requirements. Graphene is deposited on the surface of the blank to form a graphene layer to obtain a graphene heating plate. In this process, by precisely controlling the sputtering parameters, it is ensured that the graphene layer 3 is evenly and tightly covered on the surface of the blank to form a graphene heating plate.

[0112] Step 5: magnetron sputtering or magnetron sputtering evaporation integrated machine to coat the anti-oxidation layer 4:

[0113] Use vacuum magnetron sputtering or magnetron sputtering evaporation integrated machine to coat the anti-oxidation layer 4 on the entire surface of the graphene heating plate, and the vacuum degree is controlled at 1.0x10 -2 pa to 4.0x10 -4 pa, the sputtering power supply is controlled at 10 to 20KW, and the deposition thickness can be adjusted according to the requirements; the high-temperature graphene heating plate is completed.

[0114] After the preparation is completed, the product undergoes necessary post-processing, such as vacuum packaging, to ensure the product is safe during transportation and storage.

[0115] Tests of the heating plate:

[0116] (1) Conductivity test:

[0117] DC resistance: Tested with a DC resistance instrument, the test data is 100 to 500mΩ;

[0118] Square resistance: tested with ST2253 four-probe square resistance meter, test data <20mΩ;

[0119] (2) Anti-oxidation test: The product can maintain effective use time of more than 5000 hours in high temperature environment within 1000℃;

[0120] (3) High temperature resistance test: Use a high temperature resistance tester to test the product, the temperature resistance is within 1000℃;

[0121] (4) Insulation test: Use an insulation withstand voltage tester to test the product insulation data from 3 to 3.6KV.

[0122] A groove is provided on the surface of the base layer 1 to facilitate the embedding of the electrode 2. The embedded or encapsulated pre-set electrode 2 makes the contact between the electrode 2 and the graphene layer 3 closer and more uniform, which can greatly enhance the heating effect and facilitate the electrode 2 material and the base layer 1 to be at the same level. The surface is flat after the encapsulation, which makes the electrode 2 have higher durability and stability, thereby extending the service life of the graphene heating plate.

[0123] In the description of the present invention, it should be understood that the terms "upper", "lower", "both sides", "outer", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention 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 cannot be understood as a limitation on the present invention. In the description of the present invention, unless otherwise specified and limited, it should be noted that the term "connection" should be understood in a broad sense, for example, it can be a mechanical connection or an electrical connection, or it can be the internal connection of two elements, it can be a direct connection, or it can be an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0124] The above are only preferred embodiments of the invention and are not intended to limit the invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the invention should be included in the protection scope of the invention.

Claims

1. A high temperature graphene heating plate, characterized in that: It comprises a base layer (1), the upper surface and the lower surface of the base layer (1) are both provided with graphene layers (3), electrodes (2) are provided between the edge of the base layer (1) and the graphene layers (3) on the upper surface and the lower surface, the cross section of the electrode (2) is concave, there are two electrodes (2) corresponding to the graphene layer (3), the two electrodes (2) are respectively provided in two grooves provided at the edge of the base layer (1), and the upper and lower surfaces of the electrode (2) are flush with the surface of the base layer (1); An electrode substrate is sprayed on the inner region of the groove, and the electrode (2) is arranged in the groove via the electrode substrate; The electrode substrate is formed by spraying in the groove area of ​​the base layer by plasma thermal spraying or cold spraying, and the electrode substrate material is the same as the electrode material; The surface of the heating plate is provided with an anti-oxidation layer (4), and the anti-oxidation layer (4) is made of aluminum oxide, hexagonal boron nitride or aluminum silicate; The two grooves corresponding to the graphene layer (3) are symmetrically arranged at the edge of the base layer (1).

2. A method for preparing the high temperature graphene heating plate according to claim 1, characterized in that: The following steps are involved: Step 1: Base layer (1) Pre-processing: Processing a corresponding groove on the edge of the base layer (1) according to the size of the electrode (2); Step 2: Electrode (2) embedding: Embed the electrode (2) into the groove of the base layer (1) to fix the connection; Step 3: Surface shaping: Shaping so that the surface of the electrode (2) and the surface of the base layer (1) are on the same level; Step 4: Vacuum magnetron sputtering and hanging graphene coating: Using a vacuum magnetron sputtering device, graphene is deposited on the surface of the base layer (1) to form a graphene layer, thereby producing a graphene heating plate; After a groove corresponding to the size of the electrode (2) is machined at the edge of the base layer (1), a plasma thermal spraying or cold spraying method is used to spray the area inside the groove of the base layer (1) to form an electrode base; Step 4: Vacuum degree is controlled at 1.0x10 -2 pa to 4.0x10 -4 Within pa, the sputtering power supply is controlled at 10 to 20KW; Step 5: Plating an anti-oxidation layer (4) using a magnetron sputtering or magnetron sputtering evaporation integrated machine: Plating an anti-oxidation layer (4) on the entire surface of the graphene heating plate using a vacuum magnetron sputtering or magnetron sputtering evaporation integrated machine.

3. The method for preparing a high-temperature graphene heating plate according to claim 2, characterized in that: Step 3, specifically including grinding and polishing, surface shaping and grinding and polishing: grinding the embedded electrode (2) to make it flat, so that the surface of the electrode (2) and the plane of the base layer (1) are maintained at the same level.

Images