CN110996410A - Manufacturing process of high-temperature-resistant graphene heating plate - Google Patents
Manufacturing process of high-temperature-resistant graphene heating plate Download PDFInfo
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- CN110996410A CN110996410A CN201911091171.9A CN201911091171A CN110996410A CN 110996410 A CN110996410 A CN 110996410A CN 201911091171 A CN201911091171 A CN 201911091171A CN 110996410 A CN110996410 A CN 110996410A
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/10—Heater elements characterised by the composition or nature of the materials or by the arrangement of the conductor
- H05B3/12—Heater elements characterised by the composition or nature of the materials or by the arrangement of the conductor characterised by the composition or nature of the conductive material
- H05B3/14—Heater elements characterised by the composition or nature of the materials or by the arrangement of the conductor characterised by the composition or nature of the conductive material the material being non-metallic
- H05B3/145—Carbon only, e.g. carbon black, graphite
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/20—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater
Abstract
The invention discloses a manufacturing process of a high-temperature-resistant graphene heating plate. The flaky graphene, the carbon crystal powder, the auxiliary agent and the catalyst are uniformly mixed to form a flaky graphene mixture, then uniformly coating the graphene layer on a microcrystalline glass plate to form a flaky graphene layer, then putting the graphene layer into a high-temperature furnace to be dried, then continuously heating the graphene layer to preheat the graphene layer, then the temperature is raised to 600 ℃ for sintering, so that the sheet graphene layer is sintered on the microcrystalline glass plate to form a sheet graphene sintered layer, then two groups of conductive parts are arranged on the graphene sintered layer so as to be connected with a power supply, compared with the traditional technology, the structure of the sheet graphene sintered layer is more stable, the sheet graphene sintered layer is more tightly combined with the microcrystalline glass plate, the graphene heating plate is not easy to crack and melt at high temperature, and tests prove that the heating temperature of the graphene heating plate produced by the method can reach 550-600 ℃, so that compared with the prior art, the heating temperature of the graphene heating plate is greatly improved.
Description
Technical Field
The invention relates to a graphene heating plate, in particular to a manufacturing process of a high-temperature-resistant graphene heating plate.
Background
The heating plate is a heating mode commonly used for heating articles at present, graphene is a heating carrier emerging at present, and the sheet-shaped graphene plate can generate high temperature by electrifying the sheet-shaped graphene plate, but because the cost of the complete sheet-shaped graphene is high, the existing graphene heating plate is manufactured by mixing sheet-shaped graphene powder with specific glue, then coating the mixture on a microcrystalline glass plate and then hardening the mixture. But the graphite alkene hot plate of this kind of technology production has a serious problem, and graphite alkene hot plate heating temperature can only heat to 230 and give first place to 300 degrees, surpasss this temperature after, the operating condition of graphite alkene hot plate just very unstable, and glue can appear molten state, and graphite alkene hot plate is fried very easily.
Disclosure of Invention
In order to solve the technical problems, the invention aims to provide a manufacturing process of a high-temperature-resistant graphene heating plate and a graphene heating plate produced by the manufacturing process.
The technical scheme adopted by the invention for solving the problems is as follows: a manufacturing process of a high-temperature-resistant graphene heating plate comprises the following steps:
s1, preparing sheet graphene, carbon crystal powder, an auxiliary agent, a catalyst and a microcrystalline glass plate;
s2, uniformly mixing the flake graphene, carbon crystal powder, an auxiliary agent and a catalyst to form a flake graphene mixture;
s3, uniformly coating the flaky graphene mixture formed in the step S2 on one side of the microcrystalline glass plate according to requirements to form a flaky graphene layer;
s4, placing the microcrystalline glass plate printed in the step S3 into a high-temperature furnace, drying for 5-15 minutes at the temperature of 110-180 ℃, then heating to 200-300 ℃, preheating for 15-25 minutes, and then heating to the temperature of more than 600 ℃, so that the sheet graphene layer is sintered on the microcrystalline glass plate to form a sheet graphene sintered layer;
and S5, mounting two groups of conductive parts which are not in contact with each other on the sheet graphene sintering layer.
As a further improvement of the above technical solution, before step S3, the method further includes step S1.1: firstly, embossing one side of the microcrystalline glass plate corresponding to the embossing groove to form a net-shaped process groove on the microcrystalline glass plate.
As a further improvement of the above technical solution, before step S5, the method further includes the following steps:
s6, preparing tubular graphene powder and high-temperature-resistant ink, and fully mixing the tubular graphene powder and the high-temperature-resistant ink to form a tubular graphene mixture;
s7, printing and coating the tubular graphene mixture on the other side of the sintered microcrystalline glass plate at S4 to form a tubular graphene layer;
s8, placing the glass ceramic plate coated with the tubular graphene layer in the S7 high-temperature furnace at 250-400 ℃ for baking for 5-20 minutes to form a tubular graphene heat conduction layer on the other side of the glass ceramic plate.
As a further improvement of the above technical solution, before step S7, the method further includes step S9: and performing frosting treatment on one side of the microcrystalline glass plate coated with the tubular graphene mixture.
As a further improvement of the technical scheme, the tubular graphene mixture consists of 80-90% of high-temperature-resistant ink and 10-20% of tubular graphene powder in mass ratio.
As a further improvement of the above technical solution, the thickness of the tubular graphene layer is 30 to 50 micrometers.
As a further improvement of the technical scheme, the flaky graphene mixture consists of 30-50% of flaky graphene, 10-40% of carbon crystal powder, 1-5% of an auxiliary agent and 1-5% of a catalyst in percentage by mass.
As a further improvement of the above technical solution, after step S5 is completed, the method further includes step S10: and covering an insulating protective layer on the outer sides of the flaky graphene sintering layer and the conductive coating.
As a further improvement of the above technical solution, in step S3, the graphene sheet mixture is coated on the surface of the microcrystalline glass plate by printing one layer after another, and the thickness of each layer is 2-10 μm.
As a further improvement of the above technical solution, the conductive coating is conductive silver paste.
The invention has the beneficial effects that: the flaky graphene, the carbon crystal powder, the auxiliary agent and the catalyst are uniformly mixed to form a flaky graphene mixture, then uniformly coating the graphene layer on a microcrystalline glass plate to form a flaky graphene layer, then putting the graphene layer into a high-temperature furnace to be dried, then continuously heating the graphene layer to preheat the graphene layer, then the temperature is raised to 600 ℃ for sintering, so that the sheet graphene layer is sintered on the microcrystalline glass plate to form a sheet graphene sintered layer, then two groups of conductive parts are arranged on the graphene sintered layer so as to be connected with a power supply, compared with the traditional technology, the structure of the sheet graphene sintered layer is more stable, the sheet graphene sintered layer is more tightly combined with the microcrystalline glass plate, the graphene heating plate is not easy to crack and melt at high temperature, and tests prove that the heating temperature of the graphene heating plate produced by the method can reach 550-600 ℃, so that compared with the prior art, the heating temperature of the graphene heating plate is greatly improved.
Detailed Description
A manufacturing process of a high-temperature-resistant graphene heating plate comprises the following steps:
s1, preparing sheet graphene, carbon crystal powder, an auxiliary agent, a catalyst and a microcrystalline glass plate;
s2, uniformly mixing the flake graphene, carbon crystal powder, an auxiliary agent and a catalyst to form a flake graphene mixture;
s3, uniformly coating the flaky graphene mixture formed in the step S2 on one side of the microcrystalline glass plate according to requirements to form a flaky graphene layer;
s4, placing the microcrystalline glass plate printed in the step S3 into a high-temperature furnace, drying for 5-15 minutes at the temperature of 110-180 ℃, then heating to 200-300 ℃, preheating for 15-25 minutes, and then heating to the temperature of more than 600 ℃, so that the sheet graphene layer is sintered on the microcrystalline glass plate to form a sheet graphene sintered layer;
and S5, mounting two groups of conductive parts which are not in contact with each other on the sheet graphene sintering layer.
The method comprises the steps of uniformly mixing flake graphene, carbon crystal powder, an auxiliary agent and a catalyst to form a flake graphene mixture, uniformly coating the flake graphene mixture on a microcrystalline glass plate to form a flake graphene layer, putting the flake graphene layer into a high-temperature furnace to be dried, continuously heating to preheat the flake graphene layer, raising the temperature to 600 ℃ to sinter the flake graphene layer, so that the flake graphene layer is sintered on the microcrystalline glass plate to form a flake graphene sintered layer with a very stable physical form, and then mounting two groups of conductive parts on the graphene sintered layer to be connected with a power supply, compared with the prior art, the flake graphene sintered layer has a more stable structure, is more tightly combined with the microcrystalline glass plate, is not easy to explode and melt at high temperature, can enable the heating temperature to be higher, and after experiments, the heating temperature of the graphene produced by the method can reach 550 ℃ to 600 ℃, compared with the prior art, the heating temperature of the graphene heating plate is greatly improved.
Further, in order to increase the adhesion of the graphene sheet mixture to the glass ceramic plate and to reduce energy consumption, it is preferable to further include a step S1.1: firstly, embossing one side of the microcrystalline glass plate corresponding to the embossing groove to form a net-shaped process groove on the microcrystalline glass plate. Through netted technology groove, firstly can increase flake graphite alkene mixture adhesive force on the glass ceramic board, secondly through netted technology groove to the flake graphite alkene sintering layer that makes the sintering form forms more obvious current path, thereby makes the electric current of flowing through the flake graphite alkene sintering layer more regular, thereby has reduced the current loss, has prevented that the unnecessary electric energy is extravagant.
In order to increase the heat conduction efficiency of the graphene heating plate, it is preferable that a tubular graphene heat conduction layer is further disposed on the other side of the microcrystalline glass plate, and therefore, before step S5, the method further includes the following steps:
s6, preparing tubular graphene powder and high-temperature-resistant ink, and fully mixing the tubular graphene powder and the high-temperature-resistant ink to form a tubular graphene mixture;
s7, printing and coating the tubular graphene mixture on the other side of the sintered microcrystalline glass plate at S4 to form a tubular graphene layer;
s8, placing the glass ceramic plate coated with the tubular graphene layer in the S7 high-temperature furnace at 250-400 ℃ for baking for 5-20 minutes to form a tubular graphene heat conduction layer on the other side of the glass ceramic plate.
Tubular graphene has very good thermal conductivity, while flake graphene has very good electrical and heating properties. Through toasting out tubular graphite alkene heat-conducting layer at glass-ceramic plate opposite side to can be fast with heat transfer to the cooking utensil that needs the heating on, compare and directly place the cooking utensil and have better heat-conducting capacity on the glass-ceramic plate.
Further, in order to increase the adhesion of the tubular graphene mixture to the glass ceramic plate, it is preferable that step S9 is further included before step S7: and performing frosting treatment on one side of the microcrystalline glass plate coated with the tubular graphene mixture. The adhesion force of the tubular graphene mixture on the glass ceramic plate can be increased through the frosting treatment.
Further improvement is carried out, preferably, the tubular graphene mixture is prepared by mixing 80-90% of the high-temperature-resistant ink and 10-20% of tubular graphene powder.
Further improvement is carried out, preferably, the thickness of the tubular graphene on the microcrystalline glass plate is 30-50 microns.
The further improvement is that preferably, the flaky graphene mixture is prepared by mixing 30-50% of flaky graphene, 10-40% of carbon crystal powder, 1-5% of auxiliary agent and 1-5% of catalyst by mass.
Further, in consideration of safety performance, it is preferable that step S10 is further included after step S5 is completed: and covering an insulating protective layer on the outer sides of the flaky graphene sintering layer and the conductive coating. Thereby make the user can't directly touch flake graphite alkene sintering layer and conductive coating through covering insulating protective layer to factor of safety has been increased. Of course, it is not necessary to cover the conductive coating layer and the graphene sheet sintering layer with an insulating protective layer, and for example, the graphene sheet sintering layer and the conductive coating layer may be structured to prevent a user from touching the graphene sheet sintering layer and the conductive coating layer, for example, a housing for installing the present graphene heating plate to prevent a user from touching the graphene sheet sintering layer and the conductive coating layer.
In step S3, preferably, the graphene sheet mixture is coated on the surface of the glass-ceramic plate layer by printing one layer by one layer, each layer is 2 to 10 microns thick, and the number of the printed layers is determined according to actual power parameters during production, so as to adjust the resistance value of the graphene sheet sintered layer to determine the power.
The conductive part is preferably a conductive silver paste applied to the surface of the sintered layer, in consideration of the conductive property, which is preferably applied to the surface of the sintered layer, and the large-area contact of current with the sintered layer of graphene for the heating effect when in use. The conductive part may also be a copper wire welded on the surface of the graphene sheet sintered layer.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which can be directly or indirectly applied to other related technical fields without departing from the spirit of the present invention, are included in the scope of the present invention.
Claims (10)
1. The manufacturing process of the high-temperature-resistant graphene heating plate is characterized by comprising the following steps of:
s1, preparing sheet graphene, carbon crystal powder, an auxiliary agent, a catalyst and a microcrystalline glass plate;
s2, uniformly mixing the flake graphene, carbon crystal powder, an auxiliary agent and a catalyst to form a flake graphene mixture;
s3, uniformly coating the flaky graphene mixture formed in the step S2 on one side of the microcrystalline glass plate according to requirements to form a flaky graphene layer;
s4, placing the microcrystalline glass plate printed in the step S3 into a high-temperature furnace, drying for 5-15 minutes at the temperature of 110-180 ℃, then heating to 200-300 ℃, preheating for 15-25 minutes, and then heating to the temperature of more than 600 ℃, so that the sheet graphene layer is sintered on the microcrystalline glass plate to form a sheet graphene sintered layer;
and S5, mounting two groups of conductive parts which are not in contact with each other on the sheet graphene sintering layer.
2. The manufacturing process of the high-temperature-resistant graphene heating plate of claim 1, wherein:
step S1.1 is also included before step S3: firstly, embossing one side of the microcrystalline glass plate corresponding to the embossing groove to form a net-shaped process groove on the microcrystalline glass plate.
3. The manufacturing process of the high-temperature-resistant graphene heating plate of claim 2, wherein:
the method further comprises the following steps before the step S5:
s6, preparing tubular graphene powder and high-temperature-resistant ink, and fully mixing the tubular graphene powder and the high-temperature-resistant ink to form a tubular graphene mixture;
s7, printing and coating the tubular graphene mixture on the other side of the sintered microcrystalline glass plate at S4 to form a tubular graphene layer;
s8, placing the glass ceramic plate coated with the tubular graphene layer in the S7 high-temperature furnace at 250-400 ℃ for baking for 5-20 minutes to form a tubular graphene heat conduction layer on the other side of the glass ceramic plate.
4. The manufacturing process of the high-temperature-resistant graphene heating plate of claim 3, wherein:
step S9 is further included before step S7: and performing frosting treatment on one side of the microcrystalline glass plate coated with the tubular graphene mixture.
5. The manufacturing process of the high-temperature-resistant graphene heating plate of claim 3, wherein:
the tubular graphene mixture consists of 80-90% of high-temperature-resistant ink and 10-20% of tubular graphene powder in mass ratio.
6. The manufacturing process of the high-temperature-resistant graphene heating plate of claim 3, wherein:
the thickness of the tubular graphene layer is 30-50 microns.
7. The manufacturing process of the high-temperature-resistant graphene heating plate of claim 1, wherein:
the flaky graphene mixture consists of 30-50% of flaky graphene, 10-40% of carbon crystal powder, 1-5% of auxiliary agent and 1-5% of catalyst in mass ratio.
8. The manufacturing process of the high temperature resistant graphene heating plate of claim 1, 2, 3 or 4, wherein:
step S10 is also included after step S5 is completed: and covering an insulating protective layer on the outer sides of the flaky graphene sintering layer and the conductive coating.
9. The manufacturing process of the high-temperature-resistant graphene heating plate of claim 1, wherein:
in step S3, the graphene sheet mixture is coated on the surface of the glass-ceramic plate by printing one layer by one layer, and each layer is 2 to 10 micrometers thick.
10. The manufacturing process of the high-temperature-resistant graphene heating plate of claim 1, wherein:
the conductive part is conductive silver paste, and the conductive silver paste is coated on the surface of the sintering layer.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911091171.9A CN110996410A (en) | 2019-11-09 | 2019-11-09 | Manufacturing process of high-temperature-resistant graphene heating plate |
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| CN201911091171.9A CN110996410A (en) | 2019-11-09 | 2019-11-09 | Manufacturing process of high-temperature-resistant graphene heating plate |
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| CN110996410A true CN110996410A (en) | 2020-04-10 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113683920A (en) * | 2021-08-11 | 2021-11-23 | 哈工大机器人(中山)无人装备与人工智能研究院 | High-temperature graphene conductive ink, microcrystalline plate and preparation method of microcrystalline plate |
| CN115368030A (en) * | 2022-08-30 | 2022-11-22 | 牛墨石墨烯应用科技有限公司 | Preparation method of graphene heat-conducting composite glass and graphene heat-conducting composite glass |
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Application publication date: 20200410 |