Nanometer electrothermal film and preparation method of electrothermal tube using same

Abstract

The embodiment of the invention provides a nano electrothermal film and a preparation method of an electrothermal tube using the nano electrothermal film. The nano electrothermal film is a nano electrothermal film material prepared from zinc stannate, sodium stannate, sodium bismuthate, vanadium pentoxide and other substances according to a specific proportion. Compared with traditional components, the material components are lower in toxicity, the harm to the health of operators in the normal use and production process is greatly reduced, so that the safety of production and use links is improved, the environmental pollution material is better in environmental protection, the environmental risk in the production process is reduced, and the environmental protection requirement is met.

Description

Technical Field

[0001] The present invention relates to the technical field of electric heating tubes, and in particular to a method for preparing a nano electric heating film and an electric heating tube using the nano electric heating film. Background Art

[0002] Nano electric heating tubes are made by coating the inner wall of a specific tube (such as a quartz tube) with a nano-scale heating film. When current passes through, the electrons in the nano heating film move in a directional manner under the action of the electric field, collide with atoms or molecules, and convert electrical energy into thermal energy, thereby causing the heating tube to generate heat. This heating method enables heat to be generated quickly and evenly.

[0003] The current electric heating tubes and their electric heating film material components have unsafe factors. For example, some material components are toxic, which will affect human health and are not environmentally friendly. For example, Chinese patent 201710399122.6 contains toxic components such as tin tetrachloride and antimony trichloride. Therefore, the present invention proposes a method for preparing a nano electric heating film component and an electric heating tube using the same, so as to at least partially solve the problems that may exist in the prior art. Summary of the invention

[0004] In view of the above problems, embodiments of the present invention are proposed to provide a method for preparing a nano-electric heating film and an electric heating tube using the nano-electric heating film, which overcomes the above problems or at least partially solves the above problems.

[0005] In order to solve the above problems, the embodiment of the present invention discloses a nano electric heating film, comprising: The following materials are used, calculated by weight: 3-8 parts of graphene, 35-48 parts of anhydrous ethanol, 5-10 parts of cobalt chloride; and 20-35 parts of zinc stannate or sodium stannate, and 5-8 parts of sodium bismuthate or vanadium pentoxide.

[0006] Preferably, the components by weight are: 3-8 parts of graphene, 35-45 parts of anhydrous ethanol, 5-8 parts of cobalt chloride, 20-30 parts of zinc stannate, 3-8 parts of sodium bismuthate or 4-7 parts of vanadium pentoxide.

[0007] Preferably, the components by weight are: 3-8 parts of graphene, 35-45 parts of anhydrous ethanol, 5-8 parts of cobalt chloride, 25-35 parts of sodium stannate, 5-8 parts of vanadium pentoxide, or, 22-32 parts of sodium stannate and 3-8 parts of sodium bismuthate.

[0008] Preferably, the components by weight are: 25 parts of zinc stannate, 5 parts of sodium bismuthate, 3-8 parts of graphene, 40 parts of anhydrous ethanol, and 6 parts of cobalt chloride.

[0009] Preferably, the components by weight are: 30 parts of sodium stannate, 6 parts of vanadium pentoxide, 3-8 parts of graphene, 40 parts of anhydrous ethanol, and 6 parts of cobalt chloride.

[0010] A method for preparing an electric heating tube, wherein the electric heating tube is prepared by using the above-mentioned nano electric heating film, and the preparation method comprises: Using ultrasonic equipment in a constant temperature environment of 40°C to 50°C, respectively, graphene, cobalt chloride, zinc stannate or sodium stannate, sodium bismuthate or vanadium pentoxide, anhydrous ethanol and auxiliary reagents are used to prepare membrane reagents; Through a spray gun with a pressure of 0.2-0.25Mpa, the atomized particles are controlled at 8-10 microns, the ambient temperature is maintained at 520-530°C, and multiple continuous spraying is adopted, with an interval of 2-3 minutes between each spraying, to spray the membrane reagent onto the surface of the quartz glass tube to form a heating film layer, or, through a spray gun with a pressure of 0.2-0.3Mpa, the atomized particles are controlled at 6-8 microns, the ambient temperature is maintained at 530-540°C, and multiple continuous spraying is adopted, with an interval of 3-5 minutes between each spraying, to spray the membrane reagent onto the surface of the ceramic tube to form a heating film layer; Conductive silver paste is sprayed on both sides of the ceramic tube or the quartz glass tube to form an annular silver paste electrode ring, and the silver paste electrode ring is baked, sintered and cooled to obtain a stable silver paste electrode ring, wherein the silver paste electrode ring and the heating film layer have an overlapping area.

[0011] Preferably, the method uses ultrasonic equipment in a constant temperature environment of 40°C to 50°C to prepare a membrane reagent by respectively using graphene, cobalt chloride, zinc stannate or sodium stannate, sodium bismuthate or vanadium pentoxide, anhydrous ethanol and auxiliary reagents, including: Put zinc stannate or sodium stannate into a container, add a proper amount of organic acid, and stir at a certain temperature for a period of time to form a complex; Dissolving sodium bismuthate or vanadium pentoxide in an appropriate amount of deionized water to form a first solution of a certain concentration; The complex and the first solution are added into anhydrous ethanol respectively, and a first liquid mixture and a second liquid mixture are prepared in a 50° C. constant temperature water bath using an ultrasonic device; The graphene and an appropriate amount of dispersant are first mixed in deionized water to obtain a graphene dispersion liquid, the graphene dispersion liquid is subjected to ultrasonic treatment, and then added to anhydrous ethanol for further ultrasonic dispersion to obtain a third liquid mixture; Cobalt chloride was prepared by using anhydrous ethanol and ultrasonic equipment in a constant temperature water bath at 45°C. First, add the prepared first liquid mixture into the reaction container, stir at a stirring speed of 150 revolutions per minute for 5 minutes, then add the first liquid mixture, the three liquid mixture and the cobalt chloride solution in sequence, increase the stirring speed to 250 revolutions per minute after each addition, and stir for 10 minutes to ensure that all components are fully mixed to obtain a membrane reagent.

[0012] Preferably, the step of spraying the conductive silver paste on both sides of the ceramic tube or the quartz glass tube to form an annular silver paste electrode ring, and baking, sintering and cooling the silver paste electrode ring to obtain a stable silver paste electrode ring comprises: Adding an appropriate amount of nanosilver particles into the silver paste and stirring evenly to obtain a modified conductive silver paste; Spraying conductive silver paste on both sides of the ceramic tube or the quartz glass tube to form an annular silver paste electrode ring; The silver paste electrode ring is baked and pre-dried in a medium-low temperature oven at 180°C for 10 to 15 minutes, and then sintered in a high-temperature baking furnace at 600 to 620°C, and kept warm for 20 to 25 minutes; The tubular nano-electric heating tube heating film is cooled to room temperature by a slow cooling method at a rate of 5 to 8°C per minute to obtain a stable silver paste electrode circle.

[0013] Preferably, the method uses ultrasonic equipment in a constant temperature environment of 40°C to 50°C to prepare a membrane reagent by respectively using graphene, cobalt chloride, zinc stannate or sodium stannate, sodium bismuthate or vanadium pentoxide, anhydrous ethanol and auxiliary reagents, and further includes: Adding an appropriate amount of organic acid to zinc stannate or sodium bismuthate and mixing at a temperature of 40 to 50° C. to form a complex; Add an appropriate amount of anhydrous ethanol to the complex, and perform ultrasonic treatment in a constant temperature water bath at 50° C. to obtain a first liquid mixture; dissolve sodium bismuthate or vanadium pentoxide in an appropriate amount of deionized water to form a first solution of a certain concentration, add the first solution to anhydrous ethanol, and prepare a second liquid mixture in a constant temperature water bath at 50° C. using an ultrasonic device; The graphene and an appropriate amount of dispersant are first mixed in deionized water to obtain a graphene dispersion liquid, the graphene dispersion liquid is subjected to ultrasonic treatment, and then added to anhydrous ethanol for further ultrasonic dispersion to obtain a third liquid mixture; Cobalt chloride solution was prepared in a 50°C constant temperature water bath using anhydrous ethanol and ultrasonic equipment; First, add the prepared first liquid mixture into the reaction container, stir at a stirring speed of 150 to 200 revolutions per minute for 5 to 10 minutes, and then add the second liquid mixture, the third liquid mixture and the cobalt chloride solution in sequence, wherein the stirring speed after each addition is 250 revolutions per minute, and stir for 15 minutes to ensure that the components are fully mixed to obtain a membrane reagent.

[0014] Preferably, the method uses ultrasonic equipment in a constant temperature environment of 40°C to 50°C to prepare a membrane reagent by respectively using graphene, cobalt chloride, zinc stannate or sodium stannate, sodium bismuthate or vanadium pentoxide, anhydrous ethanol and auxiliary reagents, and further includes: Sodium stannate is dissolved in an appropriate amount of deionized water, and then added to anhydrous ethanol to obtain a sodium stannate solution, wherein the dissolution temperature is 60-70°C; Dissolve vanadium pentoxide in a small amount of acid solution, then add it into anhydrous ethanol to obtain a vanadium pentoxide solution with a dissolution temperature of 40-50°C; The graphene and an appropriate amount of dispersant are first mixed in deionized water to obtain a graphene dispersion liquid, the graphene dispersion liquid is subjected to ultrasonic treatment, and then added to anhydrous ethanol for further ultrasonic dispersion to obtain a third liquid mixture; Cobalt chloride solution was prepared in a 50°C constant temperature water bath using anhydrous ethanol and ultrasonic equipment; First, add the prepared sodium stannate solution into the reaction container, stir at a stirring speed of 200 revolutions per minute for 5 to 10 minutes, then add the vanadium pentoxide solution, the third liquid mixture and the cobalt chloride solution in sequence, wherein the stirring speed after each addition is 250 revolutions per minute, and stir for 15 minutes to ensure that the components are fully mixed to obtain a membrane reagent.

[0015] The embodiments of the present invention include the following advantages: The nano-electric heating film material is prepared by using zinc stannate, sodium stannate, sodium bismuthate and vanadium pentoxide in a specific proportion. Compared with traditional components, the material components in this application are less toxic, and the harm to the health of operators during normal use and production is greatly reduced, thereby improving the safety of production and use links, and the environmentally friendly materials that cause pollution to the environment are better, reducing the environmental risks in the production process, and meeting environmental protection requirements. DETAILED DESCRIPTION

[0016] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below in conjunction with specific implementation methods.

[0017] Embodiment 1 A nanometer electric heating film comprises the following materials, which are calculated by weight: 3-8 parts of graphene, 35-48 parts of anhydrous ethanol, 5-10 parts of cobalt chloride, 20-35 parts of zinc stannate or sodium stannate, and 5-8 parts of sodium bismuthate or vanadium pentoxide.

[0018] In this example, components such as tin tetrachloride and antimony trichloride that may be highly toxic in traditional electric heating film materials are discarded. Substances such as zinc stannate, sodium stannate, sodium bismuthate and vanadium pentoxide used are less toxic than the replaced components. For example, tin tetrachloride can cause serious harm to the human body when inhaled or in contact with the skin, while the new components greatly reduce the harm to the health of operators during normal use and production, thereby improving the safety of production and use. Traditional toxic ingredients may produce pollutants such as wastewater and waste gas during the production process, causing pollution to the environment. The materials in this application perform better in terms of environmental protection, reduce environmental risks in the production process, and meet environmental protection requirements. For example, in the links of material processing and waste disposal after use, the new ingredients have less negative impact on environmental factors such as soil and water sources.

[0019] By using the above 3 to 8 parts of graphene, its excellent electrical and thermal properties can be fully utilized. Graphene has high electrical conductivity and high thermal conductivity, which can effectively improve the electrothermal conversion efficiency of the electric heating film, ensuring that the heating performance of the electric heating tube is not affected while reducing toxic components. Within this content range, graphene can form a good conductive network in the film, which is conducive to the uniform generation and rapid conduction of heat. By using the above-mentioned anhydrous ethanol as a solvent, a uniformly mixed medium is provided for each component, ensuring the stability and fluidity of the membrane liquid, which is conducive to the preparation of a uniform electric heating film. Cobalt chloride, zinc stannate (or sodium stannate), and sodium bismuthate (or vanadium pentoxide) cooperate with each other to jointly affect the performance of the electric heating film. For example, zinc stannate (or sodium stannate) and sodium bismuthate (or vanadium pentoxide) can adjust the electrical properties of the electric heating film to a certain extent, and synergize with cobalt chloride to maintain the stability of the electric heating film during operation, so that the electric heating tube can generate heat stably and meet the use requirements. Through the reasonable matching of the above-mentioned new material components of this application, it is easier to control the quality during the preparation process. Through the optimized formula, product quality problems caused by unstable materials or poor interactions, such as film shedding and local overheating, are reduced, thereby improving the overall quality and service life of the electric heating tube and reducing maintenance costs and safety hazards during use.

[0020] Embodiment 2 The materials of the above-mentioned nano-electric heating film are calculated by weight: 3-8 parts of graphene, 35-45 parts of anhydrous ethanol, 5-8 parts of cobalt chloride, 20-30 parts of zinc stannate, 3-8 parts of sodium bismuthate or 4-7 parts of vanadium pentoxide.

[0021] The above 20-30 parts of zinc stannate can work well with other ingredients to ensure the performance of the electric heating film. 3-8 parts of sodium bismuthate can provide suitable redox properties and promote the formation of the film layer. 3-8 parts of graphene have excellent electrical and thermal conductivity. The right amount of graphene can improve the performance of the electric heating film. 5-8 parts of cobalt chloride play a certain auxiliary role in the film liquid. The cobalt chloride within this range can cooperate with other ingredients to improve the performance of the electric heating film.

[0022] Furthermore, the materials are calculated by weight: 25 parts of zinc stannate, 5 parts of sodium bismuthate, 6 parts of graphene, 40 parts of anhydrous ethanol, and 6 parts of cobalt chloride. With this ratio, the prepared electric heating film has good conductivity, heating stability and uniformity.

[0023] Furthermore, 25 parts of zinc stannate, 5 parts of vanadium pentoxide, 3 parts of graphene, 40 parts of anhydrous ethanol, and 6 parts of cobalt chloride. When vanadium pentoxide is 5 parts, it can better play its role in the formation process of the electric heating film while ensuring good synergy with other ingredients such as zinc stannate, so that the performance of the film layer can achieve a better balance.

[0024] Embodiment 3 The materials of the above-mentioned nano-electric heating film are calculated by weight: 3-8 parts of graphene, 35-45 parts of anhydrous ethanol, 5-8 parts of cobalt chloride; in addition, 25-35 parts of sodium stannate, 5-8 parts of vanadium pentoxide, or 22-32 parts of sodium stannate and 3-8 parts of sodium bismuthate.

[0025] Furthermore, 30 parts of sodium stannate, 6 parts of vanadium pentoxide, 6 parts of graphene, 40 parts of anhydrous ethanol, and 6 parts of cobalt chloride. Under this optimal ratio, the prepared electric heating film has good performance and stability.

[0026] Furthermore, 28 parts of sodium stannate, 5 parts of sodium bismuthate, 3 parts of graphene, 40 parts of anhydrous ethanol, and 6 parts of cobalt chloride. Through this optimal ratio, the electrical conductivity, heating stability, and film uniformity of the electric heating film are all improved to a certain extent. For example, when the sodium stannate is 28 parts, it can better play its role in the formation process of the electric heating film while ensuring good coordination with other ingredients, so that the conductivity and heating performance of the film layer can achieve a better balance.

[0027] Embodiment 4 Also disclosed is a method for preparing an electric heating tube, wherein the electric heating tube is made by applying the above-mentioned nano electric heating film, and the preparation method comprises: using ultrasonic equipment in a constant temperature environment of 40°C to 50°C, respectively, through graphene, cobalt chloride, zinc stannate or sodium stannate, sodium bismuthate or vanadium pentoxide, using anhydrous ethanol and auxiliary reagents, to prepare a membrane reagent; Through a spray gun with a pressure of 0.2-0.25Mpa, the atomized particles are controlled at 8-10 microns, the ambient temperature is maintained at 520-530°C, and multiple continuous spraying is adopted, with an interval of 2-3 minutes between each spraying, to spray the membrane reagent onto the surface of the quartz glass tube to form a heating membrane layer, or, through a spray gun with a pressure of 0.2-0.3Mpa, the atomized particles are controlled at 6-8 microns, the ambient temperature is maintained at 530-540°C, and multiple continuous spraying is adopted, with an interval of 3-5 minutes between each spraying, to spray the membrane reagent onto the surface of the ceramic tube, and ensure the formation of a uniform and dense membrane layer, i.e., a heating membrane layer; Conductive silver paste is sprayed on both sides of the ceramic tube or the quartz glass tube to form an annular silver paste electrode ring, and the silver paste electrode ring is baked, sintered and cooled to obtain a stable silver paste electrode ring, wherein the silver paste electrode ring and the heating film layer have an overlapping area.

[0028] Embodiment 5 A method for preparing an electric heating tube, wherein the membrane reagent is prepared by using an ultrasonic device in a constant temperature environment of 40°C to 50°C, respectively, through graphene, cobalt chloride, zinc stannate or sodium stannate, sodium bismuthate or vanadium pentoxide, using anhydrous ethanol and auxiliary reagents, comprising: taking zinc stannate or sodium stannate into a container, adding an appropriate amount of organic acid thereto, stirring at a certain temperature for a period of time to form a stable complex; Dissolving sodium bismuthate or vanadium pentoxide in an appropriate amount of deionized water to form a first solution of a certain concentration; The complex and the first solution are added into anhydrous ethanol respectively, and a first liquid mixture and a second liquid mixture are prepared in a 50° C. constant temperature water bath using an ultrasonic device; The graphene and an appropriate amount of dispersant (e.g., sodium dodecylbenzene sulfonate) are first mixed in deionized water to obtain a graphene dispersion, the graphene dispersion is subjected to ultrasonic treatment, and then added to anhydrous ethanol for further ultrasonic dispersion to obtain a third liquid mixture; ensuring that the graphene is uniformly dispersed in the solution; Cobalt chloride was prepared by using anhydrous ethanol and ultrasonic equipment in a constant temperature water bath at 45°C. First, add the prepared first liquid mixture into the reaction container, stir at a stirring speed of 150 revolutions per minute for 5 minutes, then add the first liquid mixture, the three liquid mixture and the cobalt chloride solution in sequence, increase the stirring speed to 250 revolutions per minute after each addition, and stir for 10 minutes to ensure that all components are fully mixed to obtain a membrane reagent.

[0029] The method comprises spraying a conductive silver paste on both sides of the ceramic tube or the quartz glass tube to form a ring-shaped silver paste electrode ring, and baking, sintering and cooling the silver paste electrode ring to obtain a stable silver paste electrode ring, including: adding an appropriate amount of nano silver particles to the silver paste and stirring evenly to obtain a modified conductive silver paste; Spraying conductive silver paste on both sides of the ceramic tube or the quartz glass tube to form an annular silver paste electrode ring; The silver paste electrode ring is baked and pre-dried in a medium-low temperature oven at 180°C for 10 to 15 minutes, and then sintered in a high-temperature baking furnace at 600 to 620°C, and kept warm for 20 to 25 minutes; The tubular nano-electric heating tube heating film is cooled to room temperature by a slow cooling method at a rate of 5 to 8°C per minute to obtain a stable silver paste electrode circle.

[0030] When making silver paste electrode rings, in order to improve the adhesion and conductivity of the electrode, an appropriate amount of nano silver particles can be added to the silver paste. After the silver paste electrode ring is applied to the surface of the electric heating film, it is first baked in a medium-low temperature oven at 180°C for pre-drying for 10 to 15 minutes, and then placed in a high-temperature baking furnace at 600 to 620°C for high-temperature sintering, and kept warm for 20 to 25 minutes. After sintering, the tubular nano-electric heating tube electric heating film is cooled to room temperature by slow cooling (cooling 5 to 8°C per minute) to reduce the stress concentration of the film layer and the electrode layer caused by rapid temperature changes, and improve the stability and reliability of the product.

[0031] It should be noted that the above-mentioned heating tube can also use a metal tube, such as an iron tube, a galvanized tube, etc., on which a film reagent and a conductive silver paste are sprayed.

[0032] Embodiment 6 The method uses ultrasonic equipment in a constant temperature environment of 40° C. to 50° C. to prepare a membrane reagent by respectively using graphene, cobalt chloride, zinc stannate or sodium stannate, sodium bismuthate or vanadium pentoxide, anhydrous ethanol and auxiliary reagents, and also includes: Add an appropriate amount of organic acid (such as citric acid, oxalic acid) to zinc stannate or sodium bismuthate and mix at 50°C to form a stable complex; Add an appropriate amount of anhydrous ethanol to the complex, and perform ultrasonic treatment in a constant temperature water bath at 50° C. to obtain a first liquid mixture; dissolve sodium bismuthate or vanadium pentoxide in an appropriate amount of deionized water to form a first solution of a certain concentration, add the first solution to anhydrous ethanol, and prepare a second liquid mixture in a constant temperature water bath at 50° C. using an ultrasonic device; The graphene and an appropriate amount of dispersant (sodium dodecylbenzene sulfonate) are first mixed in deionized water to obtain a graphene dispersion liquid, the graphene dispersion liquid is subjected to ultrasonic treatment, and then added to anhydrous ethanol for further ultrasonic dispersion to obtain a third liquid mixture; Cobalt chloride solution was prepared in a 50°C constant temperature water bath using anhydrous ethanol and ultrasonic equipment; First, add the prepared first liquid mixture into the reaction container, stir at a stirring speed of 150 to 200 revolutions per minute for 5 to 10 minutes, and then add the second liquid mixture, the third liquid mixture and the cobalt chloride solution in sequence, wherein the stirring speed after each addition is 200 to 250 revolutions per minute, and the stirring is performed for 10 to 15 minutes, preferably 250 revolutions per minute, and the stirring is performed for 15 minutes to ensure that the components are fully mixed to obtain a membrane reagent.

[0033] Embodiment 7 The method uses ultrasonic equipment in a constant temperature environment of 40° C. to 50° C. to prepare a membrane reagent by respectively using graphene, cobalt chloride, zinc stannate or sodium stannate, sodium bismuthate or vanadium pentoxide, anhydrous ethanol and auxiliary reagents, and also includes: Sodium stannate is dissolved in an appropriate amount of deionized water, and then added to anhydrous ethanol to obtain a sodium stannate solution, wherein the dissolution temperature is 60-70°C, which can ensure that the sodium stannate is fully dissolved; Dissolve vanadium pentoxide in a small amount of acid solution, then add it into anhydrous ethanol to obtain a vanadium pentoxide solution with a dissolution temperature of 40-50°C; The graphene and an appropriate amount of dispersant (sodium dodecylbenzene sulfonate) are first mixed in deionized water to obtain a graphene dispersion liquid, the graphene dispersion liquid is subjected to ultrasonic treatment, and then added to anhydrous ethanol for further ultrasonic dispersion to obtain a third liquid mixture; Cobalt chloride solution was prepared in a 50°C constant temperature water bath using anhydrous ethanol and ultrasonic equipment; First, add the prepared sodium stannate solution into the reaction container, stir for 5 to 10 minutes at a stirring speed of 150 to 200 revolutions per minute, and then add the vanadium pentoxide solution, the third liquid mixture and the cobalt chloride solution in sequence, wherein the stirring speed after each addition is 200 to 250 revolutions per minute, and the stirring is for 10 to 15 minutes, preferably 250 revolutions per minute, and the stirring is for 15 minutes, to ensure that the components are fully mixed to obtain the membrane reagent.

[0034] As an example, in the above embodiment, an appropriate amount of stabilizer or additive can be added to the material to enhance the compatibility and stability between the components. For example, adding some polymer stabilizers can improve the stability of the membrane liquid and prevent the components from precipitating or separating during storage and use. At the same time, the additive can also improve the adhesion between the electric heating film and the substrate (such as tubular quartz glass, etc.), thereby improving the reliability and service life of the product.

[0035] For the stirring operation during the preparation of the membrane liquid, more precise stirring speed and time can also be determined according to the characteristics of different components and the mixing order. For example, when adding graphene dispersion liquid, the stirring speed can be appropriately increased to 300-400 revolutions per minute and stirred for 15-20 minutes to ensure that the graphene is evenly dispersed in the solution. Then, after adding other components, adjust the stirring speed and time to ensure sufficient mixing. Narrow the temperature control range in the high-temperature furnace to 500±5℃, and the temperature control range in the high-temperature baking furnace to 550±5℃. High-precision temperature sensors and intelligent temperature control equipment can be used to monitor and adjust the temperature in real time to ensure temperature stability. This can improve the structural uniformity and performance stability of the nano-electric heating film, such as reducing defects and stress concentration in the film layer.

[0036] The beneficial effects of this application also include: By optimizing the components, the use of toxic substances is reduced, the potential harm to the environment and human health is reduced, and environmental protection requirements are met. The optimized formula and preparation method can improve the electrical and thermal conductivity of the electric heating film, achieve a faster heating rate and higher energy utilization. At the same time, the oxidation resistance and corrosion resistance of the electric heating tube are enhanced, making it more stable and reliable in various application scenarios.

[0037] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0038] Although the preferred embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the embodiments of the present invention.

[0039] Finally, it should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or terminal device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or terminal device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or terminal device including the elements.

[0040] The above is a detailed introduction to a nano-electric heating film component and a method for preparing an electric heating tube using the same provided by the present invention. Specific examples are used herein to illustrate the principle and implementation method of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. A nano-electric heating film, characterized in that: include: The following materials are used, calculated by weight: 3-8 parts of graphene, 35-48 parts of anhydrous ethanol, 5-10 parts of cobalt chloride; And 20-35 parts of zinc stannate or sodium stannate, and 5-8 parts of sodium bismuthate or vanadium pentoxide.

2. The nano-electric heating film according to claim 1, characterized in that: The components by weight are: 3-8 parts of graphene, 35-45 parts of anhydrous ethanol, 5-8 parts of cobalt chloride, 20-30 parts of zinc stannate, 3-8 parts of sodium bismuthate or 4-7 parts of vanadium pentoxide.

3. The nano-electric heating film according to claim 1, characterized in that: The components by weight are: 3-8 parts of graphene, 35-45 parts of anhydrous ethanol, 5-8 parts of cobalt chloride, 25-35 parts of sodium stannate, 5-8 parts of vanadium pentoxide, or, 22-32 parts of sodium stannate and 3-8 parts of sodium bismuthate.

4. The nano-electric heating film according to claim 2, characterized in that: The components by weight are: 25 parts of zinc stannate, 5 parts of sodium bismuthate, 3-8 parts of graphene, 40 parts of anhydrous ethanol, and 6 parts of cobalt chloride.

5. The nano-electric heating film according to claim 3, characterized in that: The components by weight are: 30 parts of sodium stannate, 6 parts of vanadium pentoxide, 3-8 parts of graphene, 40 parts of anhydrous ethanol, and 6 parts of cobalt chloride.

6. A method for preparing an electric heating tube, characterized in that: The electric heating tube is made of the nano electric heating film described in any one of claims 1 to 5, and the preparation method comprises: Using ultrasonic equipment in a constant temperature environment of 40°C to 50°C, respectively, graphene, cobalt chloride, zinc stannate or sodium stannate, sodium bismuthate or vanadium pentoxide, anhydrous ethanol and auxiliary reagents are used to prepare membrane reagents; Through a spray gun with a pressure of 0.2-0.25Mpa, the atomized particles are controlled at 8-10 microns, the ambient temperature is maintained at 520-530°C, and multiple continuous spraying is adopted, with an interval of 2-3 minutes between each spraying, to spray the membrane reagent onto the surface of the quartz glass tube to form a heating film layer, or, through a spray gun with a pressure of 0.2-0.3Mpa, the atomized particles are controlled at 6-8 microns, the ambient temperature is maintained at 530-540°C, and multiple continuous spraying is adopted, with an interval of 3-5 minutes between each spraying, to spray the membrane reagent onto the surface of the ceramic tube to form a heating film layer; Conductive silver paste is sprayed on both sides of the ceramic tube or the quartz glass tube to form an annular silver paste electrode ring, and the silver paste electrode ring is baked, sintered and cooled to obtain a stable silver paste electrode ring, wherein the silver paste electrode ring and the heating film layer have an overlapping area.

7. The preparation method according to claim 6, characterized in that: The method uses ultrasonic equipment in a constant temperature environment of 40° C. to 50° C. to prepare a membrane reagent by respectively using graphene, cobalt chloride, zinc stannate or sodium stannate, sodium bismuthate or vanadium pentoxide, anhydrous ethanol and auxiliary reagents, including: Put zinc stannate or sodium stannate into a container, add a proper amount of organic acid thereto, and stir at a certain temperature for a period of time to form a complex; Dissolving sodium bismuthate or vanadium pentoxide in an appropriate amount of deionized water to form a first solution of a certain concentration; The complex and the first solution are added into anhydrous ethanol respectively, and a first liquid mixture and a second liquid mixture are prepared in a 50° C. constant temperature water bath using an ultrasonic device; The graphene and an appropriate amount of dispersant are first mixed in deionized water to obtain a graphene dispersion liquid, the graphene dispersion liquid is subjected to ultrasonic treatment, and then added to anhydrous ethanol for further ultrasonic dispersion to obtain a third liquid mixture; Cobalt chloride solution was prepared in a constant temperature water bath at 45°C using anhydrous ethanol and ultrasonic equipment; First, add the prepared first liquid mixture into the reaction container, stir at a stirring speed of 150 revolutions per minute for 5 minutes, then add the first liquid mixture, the three liquid mixture and the cobalt chloride solution in sequence, increase the stirring speed to 250 revolutions per minute after each addition, and stir for 10 minutes to ensure that all components are fully mixed to obtain a membrane reagent.

8. The preparation method according to claim 6, characterized in that: The method comprises spraying the conductive silver paste on both sides of the ceramic tube or the quartz glass tube to form a ring-shaped silver paste electrode ring, and baking, sintering and cooling the silver paste electrode ring to obtain a stable silver paste electrode ring, including: Adding an appropriate amount of nanosilver particles into the silver paste and stirring evenly to obtain a modified conductive silver paste; Spraying conductive silver paste on both sides of the ceramic tube or the quartz glass tube to form an annular silver paste electrode ring; The silver paste electrode ring is baked and pre-dried in a medium-low temperature oven at 180°C for 10 to 15 minutes, and then sintered in a high-temperature baking furnace at 600 to 620°C, and kept warm for 20 to 25 minutes; The tubular nano-electric heating tube heating film is cooled to room temperature by a slow cooling method at a rate of 5 to 8°C per minute to obtain a stable silver paste electrode circle.

9. The preparation method according to claim 6, characterized in that: The method uses ultrasonic equipment in a constant temperature environment of 40° C. to 50° C. to prepare a membrane reagent by respectively using graphene, cobalt chloride, zinc stannate or sodium stannate, sodium bismuthate or vanadium pentoxide, anhydrous ethanol and auxiliary reagents, and also includes: Adding an appropriate amount of organic acid to zinc stannate or sodium bismuthate and mixing at a temperature of 40 to 50° C. to form a complex; Add an appropriate amount of anhydrous ethanol to the complex, and perform ultrasonic treatment in a constant temperature water bath at 50° C. to obtain a first liquid mixture; dissolve sodium bismuthate or vanadium pentoxide in an appropriate amount of deionized water to form a first solution of a certain concentration, add the first solution to anhydrous ethanol, and prepare a second liquid mixture in a constant temperature water bath at 50° C. using an ultrasonic device; The graphene and an appropriate amount of dispersant are first mixed in deionized water to obtain a graphene dispersion liquid, the graphene dispersion liquid is subjected to ultrasonic treatment, and then added to anhydrous ethanol for further ultrasonic dispersion to obtain a third liquid mixture; Cobalt chloride solution was prepared in a 50°C constant temperature water bath using anhydrous ethanol and ultrasonic equipment; First, add the prepared first liquid mixture into the reaction container, stir at a stirring speed of 150 to 200 revolutions per minute for 5 to 10 minutes, and then add the second liquid mixture, the third liquid mixture and the cobalt chloride solution in sequence, wherein the stirring speed after each addition is 250 revolutions per minute, and stir for 15 minutes to ensure that the components are fully mixed to obtain a membrane reagent.

10. The preparation method according to claim 6, characterized in that: The method uses ultrasonic equipment in a constant temperature environment of 40° C. to 50° C. to prepare a membrane reagent by respectively using graphene, cobalt chloride, zinc stannate or sodium stannate, sodium bismuthate or vanadium pentoxide, anhydrous ethanol and auxiliary reagents, and also includes: Sodium stannate is dissolved in an appropriate amount of deionized water, and then added to anhydrous ethanol to obtain a sodium stannate solution, wherein the dissolution temperature is 60-70°C; Dissolve vanadium pentoxide in a small amount of acid solution, then add it into anhydrous ethanol to obtain a vanadium pentoxide solution with a dissolution temperature of 40-50°C; The graphene and an appropriate amount of dispersant are first mixed in deionized water to obtain a graphene dispersion liquid, the graphene dispersion liquid is subjected to ultrasonic treatment, and then added to anhydrous ethanol for further ultrasonic dispersion to obtain a third liquid mixture; Cobalt chloride solution was prepared in a 50°C constant temperature water bath using anhydrous ethanol and ultrasonic equipment; First, add the prepared sodium stannate solution into the reaction container, stir at a stirring speed of 200 revolutions per minute for 5 to 10 minutes, then add the vanadium pentoxide solution, the third liquid mixture and the cobalt chloride solution in sequence, wherein the stirring speed after each addition is 250 revolutions per minute, and stir for 15 minutes to ensure that the components are fully mixed to obtain a membrane reagent.