Fiber-reinforced gypsum composite, heating element, and electronic atomizer

Abstract

The present application relates to the technical field of electronic atomization, in particular to a fiber gypsum composite material, according to mass fraction, raw materials of which include 45-60 parts of wood fiber pulp, 10-25 parts of heat-conducting graphite fiber and 20-35 parts of gypsum compound; the gypsum compound according to mass fraction includes 94-97 parts of dihydrate gypsum, 3-5 parts of silicate and 0.1-0.3 parts of sodium carboxymethyl cellulose. The fiber gypsum composite material provided by the present application uses natural wood fiber and gypsum mixture as raw materials, meets the environmental protection design, and has good compatibility and combination with graphite film, so that the heating efficiency can be improved when the heating body is formed by the fiber gypsum composite material and the graphite film. The heating body provided by the present application has high heating efficiency, and most of the materials used are natural materials, which can be recycled.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electronic atomization, in particular to a fiber gypsum composite material, a heating body and a preparation method and application thereof. BACKGROUND

[0002] The electronic atomizer is also known as virtual cigarette, electronic cigarette, vapor cigarette, etc., which is mainly used to simulate the feeling of smoking under the premise of not affecting health, so as to replace the use of cigarettes or help users achieve the purpose of quitting smoking.

[0003] The core component of the electronic atomizer is a heating device, which functions to heat the atomized liquid inside the electronic atomizer to form a smoke that can be smoked. The traditional heating device includes a heating cup, a heating sheet or a heating wire, and a lead wire, wherein the heating cup is made of superconducting material, and the heating sheet or the heating wire can be made of iron-chromium alloy material. The traditional heating cup is mostly made of alumina and zirconia material as the cup body, and is prepared by adding a ring-shaped heating wire in the middle of the cup body. The preparation material of this heating cup is not environmentally friendly, the heating efficiency is low, and the forming process is complex, which requires high-temperature sintering.

[0004] Therefore, how to provide an environmentally friendly and high-efficiency heating cup has been a problem to be solved. SUMMARY

[0005] Therefore, how to provide an environmentally friendly and high-efficiency heating cup has been a problem to be solved.

[0006] An embodiment of the present application provides a fiber gypsum composite material, which comprises, in terms of mass fraction, 45-60 parts of wood fiber pulp, 10-25 parts of heat-conducting graphite fiber, and 20-35 parts of gypsum composite; the gypsum composite comprises, in terms of mass fraction, 94-97 parts of dihydrate gypsum, 3-5 parts of silicate, and 0.1-0.3 parts of sodium carboxymethyl cellulose.

[0007] Another embodiment of the present application provides a preparation method of the fiber gypsum composite material, which comprises the following steps:

[0008] Mixing the wood fiber pulp, the heat-conducting graphite fiber, and the gypsum composite with a solvent to prepare a slurry;

[0009] Injection molding the slurry to prepare a molded body;

[0010] Freeze-drying the molded body to prepare the fiber gypsum composite material.

[0011] In some embodiments of the present application, the solvent is an ethanol-water mixed solvent with an ethanol volume concentration of 15% to 20%, and the solid content of the slurry is 80% to 85% by weight; and / or

[0012] The freeze-drying process is performed at a temperature of -4°C to -18°C for 14 to 18 hours, and then dried at a temperature of 80°C to 100°C in an inert gas environment for 8 to 10 hours.

[0013] In another embodiment of the present application, a heating element is provided, which comprises the fibrous gypsum composite material and a graphite film combined with the surface of the fibrous gypsum composite material, and the fibrous gypsum composite material and the graphite film form an integrally formed structure.

[0014] In some embodiments of the present application, the thickness of the graphite film is 17 μm to 40 μm.

[0015] In some embodiments of the present application, a plurality of through holes are formed in the graphite film.

[0016] In some embodiments of the present application, the fibrous gypsum composite material and the graphite film form the integrally formed structure by the following steps:

[0017] The graphite film is combined with the surface of the fibrous gypsum composite material, and sintered to prepare the integrally formed structure.

[0018] In some embodiments of the present application, the sintering temperature is 180°C to 220°C, and the sintering time is 1 to 2 hours.

[0019] In some embodiments of the present application, the fibrous gypsum composite material has a cylindrical structure, and the graphite film is combined with the inner surface of the fibrous gypsum composite material.

[0020] In some embodiments of the present application, before sintering, the hollow region of the cylindrical structure is filled with an elastomer, and the elastomer is removed after sintering.

[0021] In another embodiment of the present application, a heating device is provided, which comprises two wires and the heating element described above, and the two wires are respectively fixed to the two ends of the heating element.

[0022] In some embodiments of the present application, the wires are connected to the graphite film of the heating element through a conductive paste layer.

[0023] In some embodiments of the present application, the thickness of the conductive paste layer is 10 μm to 15 μm.

[0024] In another embodiment of the present application, a preparation method of the heating device described above is provided, which comprises the following steps:

[0025] The conductive paste is coated on both ends of the heating body, and the conductive wire is fixed on the conductive paste, and baked at 80-150℃ for 1-4h to prepare the heating device.

[0026] Another embodiment of the present application provides an electronic atomizer, comprising a shell, an electrode and the above-mentioned heating device, the electrode and the heating device are installed in the shell, and the electrode is electrically connected with the conductive wire of the heating device.

[0027] The fiber gypsum composite material provided by the present application uses natural wood fiber, heat-conducting graphite fiber and gypsum mixture as raw materials, meets the environmental protection design, has good compatibility and combination with the graphite film, can form a heating body with the graphite film, and improves the heating efficiency.

[0028] In the heating body, the graphite film can form a uniform resistance layer inside the heating body, and heat conduction is realized by infrared radiation to heat the space formed by the fiber gypsum composite material. The heating body provided by the present application has high heating efficiency, and the preparation process is simple, does not need high-temperature sintering, and most of the materials used are natural materials, which can be recycled. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 It is a schematic view of the heating device without taking out the elastic body of an embodiment;

[0030] Figure 2 It is a sectional view of the heating device without taking out the elastic body of an embodiment;

[0031] Figure 3 It is a schematic view of the fiber gypsum composite material of an embodiment;

[0032] Figure 4 It is a schematic view of the graphite film and the conductive wire of an embodiment;

[0033] Figure 5 It is a schematic view of the elastic body of an embodiment;

[0034] REFERENCE NUMERALS:

[0035] 1: fiber gypsum composite material; 2: graphite film; 3: conductive wire; 4: elastic body. DETAILED DESCRIPTION

[0036] In order to facilitate the understanding of the present application, the present application will be described more fully below. The preferred embodiments of the present application are given below. However, the present application can be realized in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided to make the disclosure of the present application more thorough and comprehensive.

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description herein is for describing particular embodiments only and is not intended to be limiting of the application.

[0038] In the present application, when a numerical range is involved, unless otherwise specified, the numerical range is considered to be continuous and includes the minimum and maximum values of the range and every value between the minimum and maximum values. Further, when the range refers to integers, every integer between the minimum and maximum values of the range is included. In addition, when multiple ranges are provided to describe a feature or a characteristic, the ranges can be combined. In other words, unless otherwise indicated, all ranges disclosed herein are to be understood as including any and all sub-ranges subsumed therein.

[0039] In the present application, unless otherwise specified, the temperature parameter allows both constant temperature treatment and treatment within a certain temperature range. The constant temperature treatment allows the temperature to fluctuate within the accuracy range controlled by the instrument.

[0040] One embodiment provides a fibrous gypsum composite material, which comprises 45-60 parts by mass of wood fiber pulp, 10-25 parts by mass of heat-conducting graphite fiber, and 20-35 parts by mass of gypsum composite; and the gypsum composite comprises 94-97 parts by mass of dihydrate gypsum, 3-5 parts by mass of silicate, and 0.1-0.3 parts by mass of sodium carboxymethyl cellulose.

[0041] In one example, the wood fiber pulp is prepared by treating natural wood fiber raw materials through chemical and / or physical processes.

[0042] In one example, the preparation method of the wood fiber pulp comprises the following steps:

[0043] S110: Sieving natural wood fiber raw materials, soaking in an alkaline solution, drying, ball milling, and preparing coarse fibers.

[0044] In one example, the raw materials of the wood fiber pulp are one or more of wood chips, bamboo chips, sugarcane residue, and straw.

[0045] In one example, the mesh size of the sieving is 300-600 mesh.

[0046] In one example, the alkaline solution is a calcium hydroxide aqueous solution with a mass percentage of 15-20%.

[0047] In one example, the soaking time is 1-3 months.

[0048] In one example, the ball milling time is 12h-48h.

[0049] S120: soaking the crude fibers in an alkaline solution, ball milling, suction filtration, washing, and preparing the wood fiber pulp.

[0050] In one example, the alkaline solution is a calcium hydroxide aqueous solution with a mass percentage of 15%-20%.

[0051] In one example, the soaking time is 1-3 months.

[0052] In one example, the ball milling time of the crude fibers is 2h-4h, and the temperature is 130℃-140℃.

[0053] In one example, the crude fibers are washed to neutral after suction filtration to prepare the fiber pulp.

[0054] Another embodiment of the present application provides a preparation method of the fiber gypsum composite material, comprising the following steps:

[0055] S210: mixing the wood fiber pulp, the heat-conducting graphite fiber, the gypsum composite, and a solvent to prepare a slurry.

[0056] In one example, the solvent is an ethanol aqueous mixed solvent with an ethanol volume concentration of 15%-20%.

[0057] In one example, the solid content of the slurry is 80wt%-85wt%.

[0058] S220: injection molding the slurry to prepare a molded body.

[0059] S230: performing freeze-drying treatment on the molded body to prepare the fiber gypsum composite material.

[0060] In one example, the fiber gypsum composite material has a porous structure.

[0061] In one example, the freeze-drying treatment conditions include freezing at a temperature of -4℃ to -18℃ for 14h-18h, and then drying in an inert gas environment at a temperature of 80℃-100℃ for 8h-10h.

[0062] The fiber gypsum composite material provided by the present application uses a mixture of natural wood fibers and gypsum as raw materials, meets the environmental protection design, and has good compatibility and binding property with the graphite film, so that the graphite film and the fiber gypsum composite material can jointly form a heating body to improve the heating efficiency.

[0063] Still another embodiment of the present application provides a heating body, comprising the fiber gypsum composite material and a graphite film compounded on the surface of the fiber gypsum composite material, and the fiber gypsum composite material and the graphite film form an integrally formed structure.

[0064] In one example, the fiber gypsum composite material and the graphite film form an integrally formed structure by the following steps:

[0065] The graphite film is compounded on the surface of the fiber gypsum composite material, and sintering is performed to prepare the integrally formed structure.

[0066] In one example, the graphite film can be compounded on the inner surface, the outer surface or other surfaces of the fiber gypsum composite material.

[0067] In one example, the thickness of the graphite film is 17 μm to 40 μm.

[0068] In one example, a plurality of through holes are formed on the graphite film. The resistance of the heating body can be adjusted by forming the through holes on the graphite film.

[0069] In one example, the sintering temperature is 180 °C to 220 °C, and the sintering time is 1 h to 2 h.

[0070] In one example, the fiber gypsum composite material has a cylindrical structure, and the graphite film is compounded on the inner surface of the fiber gypsum composite material.

[0071] In one example, before sintering, the step of filling an elastic body in the hollow area of the cylindrical structure and removing the elastic body after sintering is further included. Referring to Figure 1 In one example, the graphite film 2 is between the elastic body 4 and the fiber gypsum composite material 1, and the elastic body 4 is expanded by thermal expansion and contraction. When the temperature is high during sintering, the elastic body 4 is expanded, the graphite film 2 is compacted on the inner surface of the fiber gypsum composite material 1, the bonding degree of the graphite film 2 and the inner surface of the fiber gypsum composite material 1 can be further improved, and the elastic body 4 is removed after solidification and cooling, thereby obtaining the heating body.

[0072] In one example, the elastic body 4 is a silica gel rod.

[0073] In the above heating body, the graphite film 2 can form a uniform resistance layer inside the heating body, and heat conduction is performed by infrared radiation to heat the space formed by the fiber gypsum composite material 1. The heating efficiency of the heating body provided by the present application is high, the preparation process is simple, high-temperature sintering is not required, most of the materials used are natural materials, and the materials can be recycled.

[0074] Still another embodiment of the present application provides a heating device, referring toFigure 1 comprising two wires 3 and the above-mentioned heating body, the two wires 3 being fixed to the two ends of the above-mentioned heating body, respectively.

[0075] Figure 2 a cross-sectional view of a heating device of an embodiment without an elastic body; Figure 3 a schematic view of a fibrous gypsum composite 1 of an embodiment; Figure 4 a schematic view of a graphite film 2 and a wire 3 of an embodiment; Figure 5 a schematic view of an elastic body 4 of an embodiment.

[0076] In one example, the above-mentioned wire 3 is connected to the graphite film 2 of the above-mentioned heating body through a conductive paste layer.

[0077] In one example, the thickness of the above-mentioned conductive paste layer is 10 μm to 15 μm.

[0078] Still another embodiment of the present application provides a preparation method of the above-mentioned heating device, comprising the following steps:

[0079] coating a conductive paste on the two ends of the above-mentioned heating body, fixing the above-mentioned wire 3 on the above-mentioned conductive paste, and baking at 80℃ to 150℃ for 1h to 4h to prepare the above-mentioned heating device.

[0080] In one example, the above-mentioned heating device is prepared by the following steps:

[0081] 1. One or more natural wood fiber raw materials such as wood chips, bamboo chips, sugar cane residue and straw are crushed and passed through a 300 mesh to 600 mesh sieve, soaked in a calcium hydroxide aqueous solution with a mass percentage of 15% to 20% for 1 to 3 months, and then dried and dehydrated, ball-milled for 12h to 48h to obtain coarse fibers.

[0082] 2. The above-mentioned coarse fibers are soaked in a calcium hydroxide aqueous solution with a mass percentage of 15% to 20% for 1 to 3 months, and then ball-milled at a temperature of 130℃ to 140℃ for 2h to 4h, filtered, and washed and precipitated to neutral to obtain a wood fiber slurry.

[0083] 3. 45 parts to 60 parts of the wood fiber slurry, 10 parts to 25 parts of the heat-conducting graphite fiber and 20 parts to 35 parts of the gypsum composite are mixed, and then added into an ethanol water mixed solvent with an ethanol volume concentration of 15% to 20% to obtain a slurry with a solid content of 80wt% to 85wt%.

[0084] The above-mentioned gypsum composite comprises 94 to 97 parts of dihydrate gypsum, 3 to 5 parts of silicate and 0.1 to 0.3 parts of sodium carboxymethyl cellulose, according to mass parts.

[0085] 4. The slurry is injection molded to form a molded body.

[0086] 5. The molded body is frozen at a temperature of -4°C to -18°C for 14 to 18 hours, and then dried at a temperature of 80°C to 100°C for 8 to 10 hours in an inert gas environment to obtain a tubular fiber gypsum composite material 1.

[0087] 6. A graphite film 2 having a thickness of 17 to 40 μm is combined to the inner surface of the fiber gypsum composite material, and a plurality of through holes are formed in the graphite film to adjust the resistance, and Figure 4 then sintered at a temperature of 180°C to 220°C for 1 to 2 hours to obtain a heating element having an integrated structure.

[0088] Before sintering, a silica gel rod is filled in the hollow region of the tubular structure, and removed after sintering.

[0089] The graphite film 2 is between the elastomer 4 and the fiber gypsum composite material 1, and the graphite film 2 is compacted on the inner surface of the fiber gypsum composite material 1 by thermal expansion and contraction of the elastomer 4 at a high temperature during sintering, and the bonding degree of the graphite film 2 and the inner surface of the fiber gypsum composite material 1 can be further improved,

[0090] 7. The conductive paste is applied to both ends of the heating element, and a wire 3 is fixed to the conductive paste, and baked at a temperature of 80°C to 150°C for 1 to 4 hours to obtain a heating device having a conductive paste layer with a thickness of 10 to 15 μm.

[0091] An embodiment provides an electronic atomizer, comprising a housing, an electrode, and the heating device described above, the electrode and the heating device are installed in the housing, and the electrode is electrically connected to the wire 3 of the heating device.

[0092] The following is a specific embodiment:

[0093] Example 1:

[0094] This embodiment provides a heating element, which is prepared by the following steps:

[0095] 1. 50 parts of wood chips and 50 parts of bagasse are crushed and passed through a 600 mesh screen, and then soaked in a 20% by weight calcium hydroxide aqueous solution for 3 months, and then dried and dehydrated, and ball milled for 24 hours to obtain coarse fibers.

[0096] 2. The coarse fibers are soaked in a 20% by weight calcium hydroxide aqueous solution for 1 month, and then ball milled at a temperature of 140°C for 4 hours, and then filtered, and the precipitate is washed to neutral to obtain a wood fiber slurry.

[0097] 3. 50 parts of wood fiber slurry, 15 parts of heat-conducting graphite fiber and 35 parts of gypsum composite are mixed according to mass fraction, and then added into ethanol water mixed solvent with a volume concentration of 20% to obtain a slurry with a solid content of 80wt%.

[0098] The gypsum composite comprises 96 parts of dihydrate gypsum, 3.8 parts of silicate and 0.2 parts of sodium carboxymethyl cellulose according to mass fraction.

[0099] 4. The slurry is injection molded to obtain a cylindrical cup structure with a height of 5mm, an inner diameter of 3mm and an outer diameter of 5mm.

[0100] 5. The cylindrical cup structure is frozen at a temperature of -18℃ for 18h, and then dried at a temperature of 100℃ for 8h in a nitrogen environment to obtain a fiber gypsum composite material with a cylindrical structure.

[0101] 6. A graphite film with a thickness of 35μm is compounded on the surface of the fiber gypsum composite material, a plurality of through holes are formed on the graphite film to adjust the resistance, and then sintering is performed at a temperature of 200℃ for 1h to obtain a heating body with an integrated structure.

[0102] Before sintering, a silica gel rod is filled in the hollow area of the cylindrical structure, and then taken out after sintering.

[0103] The graphite film is between the elastomer and the fiber gypsum composite material, and the combination degree of the graphite film and the inner surface of the fiber gypsum composite material can be further improved by using the thermal expansion and contraction of the elastomer, expanding the elastomer at a high temperature during sintering, and compacting the graphite film on the inner surface of the fiber gypsum composite material,

[0104] 7. Conductive paste is coated on both ends of the heating body, wires are fixed on the conductive paste, and the heating device with a conductive paste layer with a thickness of 15μm is prepared by baking at a temperature of 150℃ for 1h.

[0105] 8. The saturated oil absorption of the heating device is 0.12g.

[0106] 9. The heating device is connected with electrodes, tobacco tar is dripped, and heating is performed to 200℃, atomization is performed at a constant temperature for 5s, the atomization amount is calculated to be 0.1g according to the weight difference of the heating body before and after atomization, and the atomization efficiency is 0.1 / 0.12x100%=83.3%.

[0107] Example 2:

[0108] The heating body is prepared by the following steps:

[0109] 1. 30 parts of wood chips, 35 parts of sugar cane residue and 35 parts of crop straw are crushed, passed through a 500-mesh sieve, soaked in a 15% by mass calcium hydroxide aqueous solution for 3 months, then dried and dehydrated, ball-milled for 24 h, to obtain crude fibers.

[0110] 2. The crude fibers are soaked in a 15% by mass calcium hydroxide aqueous solution for 1 month, then ball-milled at 140°C for 4 h, filtered, and the precipitate is washed to neutral to obtain wood fiber slurry.

[0111] 3. 55 parts of wood fiber slurry, 15 parts of heat-conducting graphite fiber and 30 parts of gypsum composite are mixed, and then added to an ethanol-water mixed solvent with an ethanol volume concentration of 20% to obtain a slurry with a solid content of 80 wt%.

[0112] The gypsum composite comprises 96 parts of dihydrate gypsum, 3.8 parts of silicate and 0.2 parts of sodium carboxymethyl cellulose, by mass.

[0113] 4. The slurry is injection molded to obtain a cylindrical cup structure with a height of 5 mm, an inner diameter of 3 mm and an outer diameter of 5 mm.

[0114] 5. The cylindrical cup structure is frozen at -18°C for 16 h, and then dried at 100°C for 9 h in a nitrogen environment to obtain a tubular structure of fiber gypsum composite material.

[0115] 6. A graphite film with a thickness of 17 μm is compounded on the surface of the fiber gypsum composite material, a plurality of through holes are formed on the graphite film to adjust the resistance, and then sintered at 200°C for 1 h to obtain a heating body with an integrated structure.

[0116] Before sintering, a silica gel rod is filled in the hollow area of the tubular structure, and removed after sintering.

[0117] The graphite film is between the elastomer and the fiber gypsum composite material, and the combination degree of the graphite film and the inner surface of the fiber gypsum composite material can be further improved by using the thermal expansion and contraction of the elastomer, the expansion of the elastomer when the temperature is high during sintering, and the compaction of the graphite film on the inner surface of the fiber gypsum composite material.

[0118] 7. Conductive paste is coated on both ends of the heating body, and wires are fixed on the conductive paste, and then baked at 120°C for 3 h to prepare a heating device with a conductive paste layer thickness of 15 μm.

[0119] 8. The saturated oil absorption of the heating device is 0.13 g.

[0120] 9、Connect the heating device with the electrode, drop in the tobacco tar, and heat to 200℃, keep the temperature for 5s to atomize. According to the weight difference of the heating body before and after atomization, the atomization amount is 0.11g, and the atomization efficiency is 0.11 / 0.13x100%=84.6%.

[0121] Example 3:

[0122] The embodiment provides a heating body, which is prepared by the following steps:

[0123] 1. Crush 30 parts of wood chips, 25 parts of bamboo chips and 45 parts of crop straw, pass through a 400-mesh sieve, soak in a calcium hydroxide aqueous solution with a mass percentage of 15% for 3 months, and then perform drying and dehydration treatment, ball mill for 24h to obtain coarse fibers.

[0124] 2. Soak the coarse fibers in a calcium hydroxide aqueous solution with a mass percentage of 15% for 1 month, and then perform ball milling at a temperature of 135℃ for 4h, suction filtration, and washing the precipitate to neutral to obtain a wood fiber slurry.

[0125] 3. Mix 60 parts of the wood fiber slurry, 15 parts of the heat-conducting graphite fiber and 25 parts of the gypsum composite according to the mass fraction, and then add an ethanol water mixed solvent with an ethanol volume concentration of 20% to obtain a slurry with a solid content of 80wt%.

[0126] The gypsum composite includes 95 parts of dihydrate gypsum, 4.7 parts of silicate and 0.3 parts of sodium carboxymethyl cellulose according to the mass fraction.

[0127] 4. Injection molding the slurry to obtain a cylindrical cup structure with a height of 5mm, an inner diameter of 3mm and an outer diameter of 5mm.

[0128] 5. Freeze the cylindrical cup structure at a temperature of -18℃ for 14h, and then dry the structure in a nitrogen environment at a temperature of 100℃ for 10h to obtain a tubular structure of the fiber gypsum composite material.

[0129] 6. Composite a graphite film with a thickness of 40μm on the surface of the fiber gypsum composite material, open multiple through holes on the graphite film to adjust the resistance, and then sinter at a temperature of 200℃ for 1h to obtain a heating body with an integrated structure.

[0130] Before sintering, fill silica gel rods in the hollow area of the tubular structure, and remove the silica gel rods after sintering.

[0131] 7. Coating conductive paste on both ends of the heating body, fix wires on the conductive paste, and bake at a temperature of 120℃ for 3h to prepare a heating device with a conductive paste layer with a thickness of 10μm.

[0132] 8. The saturation oil absorption of the above heating device is 0.14 g.

[0133] 9. The above heating device is connected with the electrode, and the tobacco tar is dripped, and heated to 205℃, and atomized for 5s, and according to the weight difference of the heating body before and after atomization, the atomization amount is 0.12 g, and the atomization efficiency is 0.12 / 0.14x100%=85.7%.

[0134] Comparative Example 1:

[0135] The heating body of Comparative Example 1 is basically the same as that of Example 1, and the difference is that the traditional diatomite, glass powder, PMMA, paraffin and stearic acid are used to replace the raw materials of the fiber gypsum composite material.

[0136] The preparation method of the heating body of Comparative Example 1 is as follows:

[0137] 1. 70 parts of diatomite, 30 parts of glass powder, 55 parts of poly-methyl methacrylate (PMMA) with a particle size of 50 μm, 40 parts of paraffin and 30 parts of stearic acid are mixed, and ball milling is carried out at a temperature of 60℃ for 3h, and then added into ethanol water mixed solvent with a volume concentration of 20%, to obtain a slurry with a solid content of 80wt%.

[0138] 2. The above slurry is injection molded, and the paraffin is removed at a low temperature of 280℃ for 4h, and then sintered at a temperature of 1060℃ for 3h, to obtain a cylindrical cup structure with a height of 5mm, an inner diameter of 3mm and an outer diameter of 5mm.

[0139] 3. A graphite film with a thickness of 35 μm is compounded on the surface of the above cylindrical cup structure, a plurality of through holes are formed on the graphite film to adjust the resistance, and then sintered at a temperature of 200℃ for 1h, to obtain a heating body.

[0140] 4. The saturation oil absorption of the above heating body is 0.1 g.

[0141] The above heating body is connected with the electrode, and the tobacco tar is dripped, and heated to 200℃, and atomized for 5s, and according to the weight difference of the heating body before and after atomization, the atomization amount is 0.075 g, and the atomization efficiency is 0.075 / 0.1x100%=75%.

[0142] The technical features of the above described examples can be combined arbitrarily, and in order to make the description simple, all possible combinations of the technical features in the above described examples are not described, however, as long as the combination of the technical features does not exist contradictory, it should be considered as the scope of the description.

[0143] The above embodiments only express several implementation manners of the present application, and the description is relatively specific and detailed, but should not be understood as a limitation on the patent scope of the present application. It should be noted that, for ordinary skilled persons in the art, several modifications and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A heat generating body, characterized by comprising: The fiber gypsum composite material and the graphite film are integrated by the following steps: the graphite film is compounded on the surface of the fiber gypsum composite material, and sintering is performed to prepare the integrated structure. The fiber gypsum composite material has a cylindrical structure, and further comprises the step of filling an elastomer in the hollow region of the cylindrical structure before sintering and removing the elastomer after sintering. The fiber gypsum composite material comprises, in terms of mass fraction, 45-60 parts of wood fiber pulp, 10-25 parts of heat-conducting graphite fiber, and 20-35 parts of gypsum compound. The gypsum compound comprises, in terms of mass fraction, 94-97 parts of dihydrate gypsum, 3-5 parts of silicate, and 0.1-0.3 parts of sodium carboxymethyl cellulose.

2. The heat generating body according to claim 1, characterized by The thickness of the graphite film is 17-40 μm.

3. The heat generating body according to claim 1, characterized by The graphite film is provided with a plurality of through holes.

4. The heat generating body according to claim 1, characterized by The sintering temperature is 180-220 °C, and the sintering time is 1-2 h.

5. The heat generating body according to claim 1, wherein The graphite film is compounded on the inner surface of the fiber gypsum composite material.

6. The preparation method of the heating body according to claim 1, wherein the fiber gypsum composite material is prepared by the following steps: The wood fiber pulp, the heat-conducting graphite fiber, the gypsum compound, and a solvent are mixed to prepare a slurry. The slurry is injection molded to prepare a molded body. The molded body is subjected to freeze-drying treatment to prepare the fiber gypsum composite material. The solvent is an ethanol water mixed solvent with an ethanol volume concentration of 15-20 %, and the solid content of the slurry is 80-85 wt.%; and / or 7. The method of producing a heat-generating body according to claim 6, wherein The freeze-drying treatment is performed at a temperature of -4- -18 °C for 14-18 h, and then dried in an inert gas environment at a temperature of 80-100 °C for 8-10 h. The heating device comprises two wires and the heating body according to any one of claims 1-5, and the two wires are respectively fixed to the two ends of the heating body.

8. A heat generating device, characterized by The wires are connected to the graphite film of the heating body through a conductive paste layer.

9. The heat generating device according to claim 8, characterized in that The thickness of the conductive paste layer is 10-15 μm.

10. The heat generating device according to claim 9, characterized in that The heating device is prepared by the following steps:

11. A method of producing the heat generating device according to any one of claims 8 to 10, characterized by, The conductive paste is coated on the two ends of the heating body, the wires are fixed on the conductive paste, and baking is performed at a temperature of 80-150 °C for 1-4 h. The heating device comprises a shell, an electrode, and the heating device according to any one of claims 8-10, the electrode and the heating device are installed in the shell, and the electrode is electrically connected to the wires of the heating device.

12. An electronic atomizer, characterized in that, ​

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