CN-121815466-B - Preparation method and application of heating plate with adjustable resistance

CN121815466BCN 121815466 BCN121815466 BCN 121815466BCN-121815466-B

Abstract

The invention provides a preparation method and application of a heating plate with adjustable resistance, comprising the following steps of dispersing a porous graphene-carbon nano tube hybrid in a solvent, adding an organosilicon polymer precursor, mixing and grinding to obtain slurry; and coating the slurry on a substrate to form a coating region, setting at least one high-temperature sintering region and at least one low-temperature sintering region in the coating region, respectively carrying out zonal sintering on the high-temperature sintering region and the low-temperature sintering region, wherein the sintering temperature of the high-temperature sintering region is higher than that of the low-temperature sintering region, and obtaining the heating plate. According to the preparation method of the heating plate with adjustable resistance, the porous graphene-carbon nano tube hybrid and the organosilicon polymer precursor are used for preparing slurry, a uniform conductive network is formed by means of the porous structure of the hybrid, film forming and bonding strength are guaranteed, the same coating area is used for sintering, high and low area resistance areas are formed by means of temperature difference, the integrated conductive layer reduces thermal stress, and meanwhile the reliability of the heating plate is remarkably improved while the process is simplified.

Inventors

SONG QI
JIANG BIN
YU LEI
WANG HUIMING
LI NIE

Assignees

雷索新材料(苏州)有限公司

Dates

Publication Date: 20260512
Application Date: 20260309

Claims (9)

1. A method for manufacturing a heating plate with adjustable resistance, which is characterized by comprising the following operations: Mixing graphene and carbon nano tubes, dispersing in water, adding an etchant, and reacting at high temperature to obtain a porous graphene-carbon nano tube hybrid; Dispersing the porous graphene-carbon nanotube hybrid in a solvent, adding an organosilicon polymer precursor, mixing and grinding to obtain slurry; Coating the slurry on a substrate to form a coating region, setting at least one high-temperature sintering region and at least one low-temperature sintering region in the coating region, and carrying out zone sintering on the high-temperature sintering region and the low-temperature sintering region respectively, wherein the sintering temperature of the high-temperature sintering region is higher than that of the low-temperature sintering region; Obtaining a heating plate; Wherein the sintering temperature of the low-temperature sintering area is 450-550 ℃, and the surface resistance is 500-1000 ohm/square; The sintering temperature of the high-temperature sintering area is 550-800 ℃, and the surface resistance is 50-500 ohm/square.
2. The method for manufacturing the heating plate with the adjustable resistor according to claim 1, wherein the mass ratio of the graphene to the carbon nano tube is 1 (0.2-5).
3. The method of manufacturing a resistance-adjustable heating plate according to claim 1, wherein the etchant includes one or more of a strong oxidizer and a strong base; the strong oxidant comprises one or more of nitric acid, hydrogen peroxide, perchloric acid and potassium permanganate, and/or, The strong base includes one or more of sodium hydroxide and potassium hydroxide.
4. The method for preparing the heating plate with the adjustable resistor according to claim 1, wherein the mass ratio of the porous graphene-carbon nanotube hybrid to the organosilicon polymer precursor is 1 (5-50).
5. The method of manufacturing a resistance-adjustable heating plate according to claim 1, wherein the organosilicon polymer precursor includes one or more of polycarbosilane, polysiloxane, polysilazane, and polysilazane.
6. The method for manufacturing a heating panel with adjustable resistance according to claim 1, wherein the solvent comprises one or more of toluene and xylene, and/or, The substrate includes one or more of an alumina ceramic plate, a zirconia ceramic plate, and a glass ceramic plate.
7. The method for manufacturing a heating plate with adjustable resistance according to claim 1, wherein the slurry comprises the following components in mass percent: Graphene 1 part 0.2-5.0 Parts of carbon nano tube 6-100 Parts of organosilicon polymer precursor 0.1 To 0.5 part of auxiliary agent 1-5 Parts of filler.
8. The method for manufacturing a heating plate for an adjustable resistor according to claim 1, wherein the slurry comprises an auxiliary agent and a filler, the auxiliary agent comprises a silane coupling agent, the silane coupling agent comprises one or more of KH550, KH560, KH570, and/or, The filler comprises one or more of alumina, silicon carbide, and silicon oxide; the thickness of the slurry coating is 40-200 mu m.
9. The application of the heating plate prepared by the resistance-adjustable heating plate preparation method according to any one of claims 1-8 in heating devices.

Description

Preparation method and application of heating plate with adjustable resistance Technical Field The invention relates to the technical field of heating plates, in particular to a preparation method and application of a heating plate with adjustable resistance. Background In electronic devices and heating apparatuses having heating plates, the heating plates generally require a coating structure having different area resistance zones to achieve a zone function (e.g., zone heating). The traditional mode for preparing the coating is often dependent on adjusting the formula components of the conductive paste, changing the coating thickness of the coating, or realizing the area resistance difference of different areas through complex processes of repeated coating and step drying, so that the method has the advantages of complex operation, long production period, and easiness in generating the problem of poor performance consistency of each area, thereby influencing the reliability of the product. Disclosure of Invention Aiming at the problems of complex process and low product reliability in the operation of realizing different surface resistances on the same coating surface of the heating plate in the prior art, the preparation method and the application of the heating plate with adjustable resistance are provided. The technical scheme adopted by the invention for solving the technical problems is as follows: in one aspect, the invention provides a method for preparing a heating plate with adjustable resistance, comprising the following operations: Mixing graphene and carbon nano tubes, dispersing in water, adding an etchant, and reacting at high temperature to obtain a porous graphene-carbon nano tube hybrid; Dispersing the porous graphene-carbon nanotube hybrid in a solvent, adding an organosilicon polymer precursor, mixing and grinding to obtain slurry; Coating the slurry on a substrate to form a coating region, setting at least one high-temperature sintering region and at least one low-temperature sintering region in the coating region, and carrying out zone sintering on the high-temperature sintering region and the low-temperature sintering region respectively, wherein the sintering temperature of the high-temperature sintering region is higher than that of the low-temperature sintering region; Obtaining a heating plate; Wherein the sintering temperature of the low-temperature sintering area is 450-550 ℃, and the surface resistance is 500-1000 ohm/square; The sintering temperature of the high-temperature sintering area is 550-800 ℃, and the surface resistance is 50-500 ohm/square. Optionally, the mass ratio of the graphene to the carbon nanotube is 1 (0.2-5). Optionally, the etchant includes one or more of a strong oxidizer and a strong base; the strong oxidant comprises one or more of nitric acid, hydrogen peroxide, perchloric acid and potassium permanganate, and/or, The strong base includes one or more of sodium hydroxide and potassium hydroxide. Optionally, the mass ratio of the porous graphene-carbon nanotube hybrid to the organosilicon polymer precursor is 1 (5-50). Alternatively, the process may be carried out in a single-stage, the organosilicon polymer precursor comprises polycarbosilane, polysiloxane, polysilazane polysilazane and polysilazane oxide one or more of the alkanes. Optionally, the solvent comprises one or more of toluene and xylene, and/or, The substrate includes one or more of an alumina ceramic plate, a zirconia ceramic plate, and a glass ceramic plate. Optionally, the slurry comprises the following components in mass: Graphene 1 part 0.2-5.0 Parts of carbon nano tube 6-100 Parts of organosilicon polymer precursor 0.1 To 0.5 part of auxiliary agent 1-5 Parts of filler. Optionally, the slurry includes an adjuvant and a filler, the adjuvant including a silane coupling agent including one or more of KH550, KH560, KH570, and/or, The filler comprises one or more of alumina, silicon carbide, and silicon oxide; the thickness of the slurry coating is 40-200 mu m. On the other hand, the heating plate prepared by the preparation method of the heating plate provided by the invention is applied to heating devices. The application has the beneficial effects that: According to the preparation method of the heating plate, the porous graphene-carbon nanotube hybrid body is used as a conductive base material, the organic silicon polymer precursor is matched to prepare slurry, a porous structure of the hybrid body can form a uniform conductive network, the organic silicon precursor provides good film forming property and bonding strength with the base material for the slurry, meanwhile, a high-temperature low-temperature sintering area is arranged in the same coating area and zoned sintering is carried out, the sintering temperature is utilized to control the microstructure of the conductive layer, the high-temperature sintering area can enable the organic silicon polymer precursor to be subjected to m