CN110022622B - Alumina honeycomb ceramic heating body and preparation method thereof - Google Patents
Alumina honeycomb ceramic heating body and preparation method thereof Download PDFInfo
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- CN110022622B CN110022622B CN201910409470.6A CN201910409470A CN110022622B CN 110022622 B CN110022622 B CN 110022622B CN 201910409470 A CN201910409470 A CN 201910409470A CN 110022622 B CN110022622 B CN 110022622B
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- 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
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- H—ELECTRICITY
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- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
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Abstract
The invention provides an alumina honeycomb ceramic heating element and a preparation method thereof, comprising alumina honeycomb ceramic, a heating printed circuit and a lead; the heating printed circuit is arranged on the outer surface of the alumina honeycomb ceramic in a surrounding way; and the head end and the tail end of the heating printed circuit are provided with leads. The alumina honeycomb ceramic heating body has the advantages of good heating efficiency, high heat conductivity, good compactness, rapid air heating, energy and electricity saving, no adsorption of smoke particles and no peculiar smell.
Description
Technical Field
The invention relates to the technical field of electronic cigarettes, in particular to an alumina honeycomb ceramic heating body and a preparation method thereof in the technical field of electronic cigarettes.
Background
Articles such as cigarettes, cigars and the like burn tobacco during use to produce tobacco smoke. The smoke generated by the combustion of tobacco contains a plurality of carcinogenic substances, such as tar, and the substances can cause great harm to human bodies after being inhaled for a long time. With the technological progress and the pursuit of people for healthy life, a cigarette substitute, namely an electronic cigarette, appears. One of the typical e-cigarette solutions has attempted to provide an alternative to these types of articles by creating products that release compounds without burning. Examples of such products are so-called heat non-combustible products, also known as tobacco heating products or tobacco heating devices, which release compounds by heating but not burning the material. The material may be, for example, tobacco or other non-tobacco products or combinations, such as blends, which may or may not contain nicotine. Similarly, there are also so-called smoke electronic smoking devices, which typically vaporize a liquid that may or may not contain nicotine.
At present, the heating non-combustion electronic cigarette products on the market mainly have three types:
one is ceramic heating sheet (advantage, rapid heating speed, large heat transfer area, uniform heating and good taste.)
The zirconia ceramic substrate and the noble metal heating slurry have small volume and light weight, can obtain high power density and high thermal efficiency; the temperature-rising type heat-insulation material has excellent thermal characteristics, is high in temperature-rising speed, and can obtain any temperature distribution; the reliability is high, the service life is long, the heating element material cannot be oxidized, and the acid and alkali resistance is excellent; corrosion resistance, high temperature resistance, uniform temperature, good heat conductivity and high heat compensation speed. There are also alternative products on the market today, which are much less costly than before.
The alumina ceramic and the heating slurry replace a new form of a heating sheet. The heating efficiency can be compared with that of the heating sheet.
Whether the heating sheet or the heating needle is adopted, one problem of central heating is that the temperature difference from the top to the bottom of the uneven temperature distribution of the whole heating body reaches about 100 ℃, so that the tobacco is not sufficiently baked and even has scorched flavor, and the tobacco waste is large. Special smoke cartridges are required to be matched with the sheet heating body to achieve the effect.
Two, the cylinder heating rod
The rod-shaped structure has high strength and cannot be broken. The high-temperature co-fired ceramic heating element has good compactness, and the heating wire is completely wrapped in the ceramic. The reliability is high after long-term use. The temperature rise speed is high, and the uniformity is good. The welding spot adopts 1000 ℃ silver brazing process, is stable and can resist 350 ℃ high temperature for a long time.
Thirdly, ceramic heating cup \ heating tube \ heating pan (advantages, rapid heating, high reliability and long service life)
The heating cup/heating tube/heating pot is a typical representative of the surrounding heating. Annular sectional heating, and accurate temperature control. The biggest problem of the method is that the heat utilization rate is low, one part of the heat is absorbed by tobacco and the other part of the heat is radiated in a heated mode, and if the heat insulation is not good, the smoking set can scald hands.
The domestic application number is CN201721741519.0, the name of which is a heated air type electronic cigarette heater, which is a typical non-contact heating electronic cigarette, and the following contents are specifically disclosed: the heat insulation device comprises a heat insulation sleeve with a sleeve hollow space, wherein a first heating pipe is arranged in the sleeve hollow space of the heat insulation sleeve, the first heating pipe is provided with a heating pipe hollow space, the bottom of the first heating pipe is sealed, a second heating pipe is arranged in the heating pipe hollow space of the first heating pipe, an intermediate heating space is arranged in the second heating pipe, a first heating space is arranged between the inner side wall of the heat insulation sleeve and the outer side wall of the first heating pipe, a second heating space is arranged between the inner side wall of the first heating pipe and the outer side wall of the second heating pipe, a first airflow spiral pipe is arranged in the first heating space, a second airflow spiral pipe is arranged in the second heating space, a first airflow notch for communicating the first heating space with the second heating space is arranged on the first heating pipe, and a second airflow notch for communicating the second heating space with the intermediate heating space is arranged on the second heating pipe, the upper part of the heat insulation sleeve is provided with a tobacco container, the tobacco container is provided with a tobacco containing cavity, and the tobacco containing cavity is communicated with the internal heating space. The mode of heating the air is that the air is heated by adopting a double-layer heating pipe, the heating power is increased, and the air is rapidly heated when being sucked by matching with the airflow spiral pipe, so that the temperature of the air on the tobacco reaches the proper standard. However, the double-layer heating sheet adopted in the scheme has a complex structure, cannot be integrally formed, is high in assembly difficulty and production cost, has a limited contact area between the heating sheet and air, is general in heating efficiency, consumes a large amount of electric energy when reaching a sufficient temperature, and cannot achieve the effects of energy conservation and emission reduction.
As mentioned above, the contact heating baking technology mainly transfers and exchanges heat by means of heat transfer, i.e. a heat conductor (such as a ceramic heat generating sheet or pin) transfers temperature to the object to be baked (smoking material). The disadvantages of this heating method are mainly two: 1. the baked objects (smoke substances) have poor heat conduction performance and cannot fully transfer temperature, so that the inside and outside baking of the baked objects is uneven; 2. the difference of the space density of various baked objects of different types is large, and the heating and baking effect is difficult to guarantee when the baked objects of different types are replaced. The good effect can be achieved only by using the matched baking object, and the adaptability is poor. In summary, such heating devices have technical defects of uneven baking, small smoke amount, light taste, poor user experience and the like, and the defects seriously limit further forward development and popularization and application in the field.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide the alumina honeycomb ceramic heating body which can quickly and uniformly heat, has large heating surface, small power consumption, long service life and good heat preservation performance.
The invention is realized by the following mode, and the alumina honeycomb ceramic heating element and the preparation method thereof are characterized in that: comprises an alumina honeycomb ceramic body, a heating printed circuit and a lead; a porous channel is arranged in the center of the alumina honeycomb ceramic body; the heating printed circuit is arranged on the outer surface of the alumina honeycomb ceramic body in a surrounding manner; the head end and the tail end of the heating printed circuit are provided with leads;
the preparation method of the alumina honeycomb ceramic heating element comprises the following steps:
the method comprises the following steps: preparing the alumina ceramic tube pug: adding 0.01-0.05 part by weight of magnesium nitrate, 0.01-0.05 part by weight of zirconium oxychloride, 0.01-0.05 part by weight of yttrium nitrate, 1.5-2.5 parts by weight of oleic acid, 1-2 parts by weight of lubricant, 3-15 parts by weight of binder and 10-30 parts by weight of deionized water into 100 parts by weight of nano alumina powder, putting into a mixer, and mixing at the temperature of below 30 ℃ for 1-5 hours to prepare alumina honeycomb ceramic pug which is uniformly dispersed and has a solid content of 75-85% for later use;
step two: forming the alumina honeycomb ceramic: adding the alumina honeycomb ceramic pug prepared in the step one into a screw type ceramic extrusion forming machine with a vacuum defoaming device, and extruding the ceramic pug into a hollow and thin-wall honeycomb ceramic blank through a die head under the pushing of a screw;
step three: drying the alumina honeycomb ceramic blank: transferring the ceramic blank prepared in the step two to an oven, and drying and dehydrating for 5-10 minutes under the condition of hot air at 40-50 ℃ to obtain a ceramic green body with the appearance and the straightness meeting the requirements;
step four: gel discharging of the alumina ceramic green tube: biscuit firing the ceramic green body prepared in the step three at 1100-1200 ℃ to obtain a ceramic biscuit firing blank;
step five: firing of alumina ceramics: firing the biscuit ceramic in the step four in a high-temperature molybdenum tube at 1600-1800 ℃ in a hydrogen atmosphere or directly in air to obtain alumina honeycomb ceramic;
step six: the surface of the alumina ceramic tube is heated and printed with a circuit and the lead thereof is manufactured: and D, printing a thick-film electric heating wire on the outer surface of the alumina ceramic tube prepared in the fifth step by adopting a screen printing technology, coating silver solder on a pad to stick the wire after the printed circuit is dried, putting the wire into the oven for drying again, then transferring the wire into a normal-pressure hydrogen furnace for sintering at 800-1500 ℃ to obtain the heating element of the wire co-fired alumina honeycomb ceramic body, and simultaneously finishing silver soldering of the wire in the furnace.
Further, the purity of the nano alumina powder used in the first step is more than or equal to 99.99%, the particle diameter is 350nm, and the specific surface area is 7m2/g。
Further, the density of the alumina honeycomb ceramic body is not less than 3.86g/cm 3.
Further, the resistance of the alumina honeycomb ceramic body is 0.1-2 omega.
Furthermore, the alumina honeycomb ceramic body is a cylindrical body with a circular or square or polygonal section, and the porous channel at the center of the alumina honeycomb ceramic body is a square hole or a round hole or other polygonal holes which are uniformly distributed.
Further, the aperture of the porous channel is 0.1-2 mm; the wall thickness of the porous channel is 0.1-0.5 mm.
Further, the material of the heat-generating printed circuit includes, but is not limited to, silver, tungsten, MoMn, and other suitable printed circuit materials.
Furthermore, the printing thickness of the heating printed circuit is 0.005-0.05 mm.
Furthermore, the wire is made of copper, silver, nickel, and has a diameter of 0.1-0.3 mm.
The invention has the beneficial effects that: the purity of the alumina honeycomb ceramic manufactured by the method is about 99.99 percent, so that the surface compactness of the honeycomb ceramic is high, the adsorption of smoke particles can be effectively prevented, and the effect of preventing peculiar smell is achieved. The high-purity alumina honeycomb ceramic has good thermal conductivity, the thermal conductivity is as high as 33W/m.k, the wall thickness and the pore diameter in the honeycomb ceramic structure are small, the heat conduction effect is extremely good, meanwhile, the contact area between the honeycomb porous shape and air can be greatly increased, the specific surface area of the alumina honeycomb ceramic is large, the heating efficiency is high, and the purpose of heating the air can be realized more quickly. The honeycomb ceramic heating body is arranged below the cigarette to be baked and is not in contact with the cigarette to be baked, when a user sucks the cigarette, air with the bottom heated by the honeycomb ceramic heating body is in contact with the cigarette to rapidly and uniformly heat the cigarette, and due to the existence of the honeycomb porous structure, the flowing speed of gas is limited to a certain extent, the contact time of hot air and the cigarette is longer, the heat loss is slowed down, and the energy is saved. When the suction action is not carried out, the porous shape of the honeycomb ceramics can lock hot air at the same time, the outflow of hot gas is reduced, and the energy is further saved.
The honeycomb ceramic is mainly used in the adsorption treatment of automobile exhaust, the characteristics of porosity and large adsorption area of the honeycomb ceramic are utilized, harmful particles can be better adsorbed, and besides a pore canal with a special honeycomb shape, a ceramic body of the honeycomb ceramic also has micropores, so that the honeycomb ceramic has a strong adsorption effect. In the electron cigarette heating field, need treat and toast the pipe tobacco and carry out quick heating, consequently need the heating member to have good heat conductivity, but general pottery has good heating efficiency, but the heat conductivity is not high, consequently needs to adopt contact heating mode just can play better stoving effect, for example the heater of the ceramic heating piece formula among the prior art. The use of ceramics as the heating body in non-contact heaters is a highly unwieldy option in the prior art.
Drawings
FIG. 1 is a schematic view of a structure of an alumina honeycomb ceramic heating element.
FIG. 2 is a plan development view of a surface heating printed circuit of an alumina honeycomb ceramic heating element.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings of the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "provided," "connected," and the like are to be construed broadly, such as "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The embodiments of the invention will now be described in detail with reference to the accompanying drawings:
the first embodiment is as follows:
as shown in fig. 1-2, an alumina honeycomb ceramic heating element and a preparation method thereof are characterized in that: comprises an alumina honeycomb ceramic body 1, a heating printed circuit 2 and a lead 3; the center of the alumina honeycomb ceramic body 1 is provided with a porous channel 11; the heating printed circuit 2 is arranged on the outer surface of the alumina honeycomb ceramic body 1 in a surrounding way; the head end and the tail end of the heating printed circuit 2 are provided with leads 3;
the preparation method of the alumina honeycomb ceramic heating element comprises the following steps:
the method comprises the following steps: preparing the alumina ceramic tube pug: adding 0.04 weight part of Mg (NO) into 100 weight parts of nano alumina powder3)2·6H2O, 0.04 parts by weight of ZrOCl2·8H2O, 0.01 part by weight of Y (NO)3)3·6H2Placing O, 2.4 parts by weight of oleic acid, 1.2 parts by weight of polyethylene glycol 600, 14 parts by weight of high-purity ethyl cellulose ether and 12 parts by weight of deionized water into a mixer, and mixing for 5 hours at the temperature below 30 ℃ to prepare alumina honeycomb ceramic pug which is uniformly dispersed and has the solid content of 75% for later use;
step two: forming the alumina honeycomb ceramic: adding the alumina honeycomb ceramic pug prepared in the step one into a screw type ceramic extrusion forming machine with a vacuum defoaming device, and extruding the ceramic pug into a hollow and thin-wall honeycomb ceramic blank through a die head under the pushing of a screw;
step three: drying the alumina honeycomb ceramic blank: transferring the ceramic blank prepared in the step two to an oven, and drying and dehydrating for 5 minutes under the condition of 49 ℃ hot air to obtain a ceramic green body with the appearance and the straightness meeting the requirements;
step four: gel discharging of the alumina ceramic green tube: biscuit firing the ceramic green body prepared in the step three at 1190 ℃ to obtain a ceramic biscuit firing blank;
step five: firing of alumina ceramics: placing the ceramic biscuit in the step four in a high-temperature molybdenum tube, and firing at 1650 ℃ in a hydrogen atmosphere or directly in air to obtain alumina honeycomb ceramic;
step six: the surface of the alumina ceramic tube is heated and printed with a circuit and the lead thereof is manufactured: and (4) printing a thick-film electric heating wire on the outer surface of the alumina ceramic tube prepared in the fifth step by adopting a screen printing technology, coating silver solder on a pad to stick the wire after the printed circuit is dried, putting the wire into the oven for drying again, then transferring the wire into a normal-pressure hydrogen furnace for sintering at 800 ℃ to obtain a heating element of the wire co-fired alumina honeycomb ceramic body 1, and simultaneously finishing silver brazing of the wire in the furnace.
Further, the purity of the nano alumina powder used in the first step is more than or equal to 99.99%, the particle diameter is 350nm, and the specific surface area is 7m2/g。
Further, the density of the alumina honeycomb ceramic body 1 is 3.9g/cm3。
Further, the resistance of the alumina honeycomb ceramic body 1 is 0.6 Ω.
Further, the alumina honeycomb ceramic body 1 is a cylindrical body with a circular cross section, and the porous channel 11 at the center of the body is a square hole which is uniformly distributed.
Furthermore, the aperture of the square hole of the porous channel 11 is 1.5mm, that is, the side length of the square hole is 1.5 mm; the wall thickness of the porous channel 11 is 0.2mm, and as shown in fig. 1, the distance between corresponding edges of two adjacent square holes is the wall thickness of the porous channel 11.
Further, the material of the heat-generating printed circuit 2 is silver.
Further, the printed thickness of the heat-generating printed circuit 2 was 0.015 mm.
Further, the wire 3 is a silver wire with a diameter of 0.2 mm.
Example two:
as shown in fig. 1-2, an alumina honeycomb ceramic heating element and a preparation method thereof are characterized in that: comprises an alumina honeycomb ceramic body 1, a heating printed circuit 2 and a lead 3; the center of the alumina honeycomb ceramic body 1 is provided with a porous channel 11; the heating printed circuit 2 is arranged on the outer surface of the alumina honeycomb ceramic body 1 in a surrounding way; the head end and the tail end of the heating printed circuit 2 are provided with leads 3;
the preparation method of the alumina honeycomb ceramic heating element comprises the following steps:
the method comprises the following steps: preparing the alumina ceramic tube pug: adding 0.02 weight part of Mg (NO) into 100 weight parts of nano alumina powder3)2·6H2O, 0.05 weight part of ZrOCl2·8H2O, 0.015 parts by weight of Y (NO)3)3·6H2Placing O, 2 parts by weight of oleic acid, 1.5 parts by weight of polyethylene glycol 600, 8 parts by weight of high-purity ethyl cellulose ether and 20 parts by weight of deionized water into a mixer, and mixing for 5 hours at the temperature below 30 ℃ to prepare alumina honeycomb ceramic pug which is uniformly dispersed and has the solid content of 78% for later use;
step two: forming the alumina honeycomb ceramic: adding the alumina honeycomb ceramic pug prepared in the step one into a screw type ceramic extrusion forming machine with a vacuum defoaming device, and extruding the ceramic pug into a hollow and thin-wall honeycomb ceramic blank through a die head under the pushing of a screw;
step three: drying the alumina honeycomb ceramic blank: transferring the ceramic blank prepared in the step two to an oven, and drying and dehydrating for 5 minutes under the condition of 49 ℃ hot air to obtain a ceramic green body with the appearance and the straightness meeting the requirements;
step four: gel discharging of the alumina ceramic green tube: biscuit firing the ceramic green body prepared in the step three at 1190 ℃ to obtain a ceramic biscuit firing blank;
step five: firing of alumina ceramics: placing the ceramic biscuit in the step four in a high-temperature molybdenum tube, and firing at 1650 ℃ in a hydrogen atmosphere or directly in air to obtain alumina honeycomb ceramic;
step six: the surface of the alumina ceramic tube is heated and printed with a circuit and the lead thereof is manufactured: and (4) printing a thick-film electric heating wire on the outer surface of the alumina ceramic tube prepared in the fifth step by adopting a screen printing technology, coating silver solder on a pad to stick the wire after the printed circuit is dried, putting the wire into the oven for drying again, then transferring the wire into a normal-pressure hydrogen furnace for sintering at 800 ℃ to obtain a heating element of the wire co-fired alumina honeycomb ceramic body 1, and simultaneously finishing silver brazing of the wire in the furnace.
Further, the purity of the nano alumina powder used in the first step is more than or equal to 99.99%, the particle diameter is 350nm, and the specific surface area is 7m2/g。
Further, the density of the alumina honeycomb ceramic body 1 is 3.9g/cm3。
Further, the resistance of the alumina honeycomb ceramic body 1 is 0.8 Ω.
Further, the alumina honeycomb ceramic body 1 is a cylindrical body with a circular cross section, and the porous channel 11 at the center of the body is a square hole which is uniformly distributed.
Furthermore, the aperture of the square hole of the porous channel 11 is 1.5mm, that is, the side length of the square hole is 1.5 mm; the wall thickness of the porous channel 11 is 0.2mm, and as shown in fig. 1, the distance between corresponding edges of two adjacent square holes is the wall thickness of the porous channel 11.
Further, the material of the heat-generating printed circuit 2 is silver.
Further, the printing thickness of the heat-generating printed circuit 2 was 0.02 mm.
Further, the wire 3 is a silver wire with a diameter of 0.2 mm.
The purity of the alumina honeycomb ceramic prepared by the method of the invention is over 99 percent, so that the compactness of the surface of the honeycomb ceramic is very high, the adsorption of smoke dust particles can be effectively prevented, and the effect of preventing peculiar smell is achieved. High-purity alumina honeycomb pottery has good heat conductivity, and the heat conductivity is up to 33W/m.k, and wall thickness and aperture in the honeycomb ceramic structure are all very little, and the heat conduction effect is extremely good, and the porous shape of honeycomb simultaneously can great increase with the area of contact of air, and alumina honeycomb pottery's specific surface area is big, and heating efficiency is high, the purpose of realization heated air that can be faster.
The honeycomb ceramic heating body is arranged below the cigarettes to be baked and is not in contact with the cigarettes to be baked, when a user sucks the cigarettes, air flows through holes of a honeycomb of the heating body and is heated to a specific temperature, and then hot air flows through the cigarettes to rapidly heat the cigarettes to 320 ℃. The method improves the heating area and heating efficiency of the cigarette body, the heating is more uniform, the tobacco shreds are carbonized more completely, the tobacco shreds are prevented from being wasted, the taste of a user is improved, and the method is not limited by the types of the cigarette bullets. Due to the existence of the honeycomb porous structure, the flowing speed of the gas is limited to a certain extent, the contact time of the hot air and the cigarette is longer, the heat loss is slowed down, and the energy is saved. When the suction action is not carried out, the porous shape of the honeycomb ceramics can lock hot air at the same time, the outflow of hot gas is reduced, and the energy is further saved.
The above-mentioned preferred embodiments, further illustrating the objects, technical solutions and advantages of the present invention, should be understood that the above-mentioned are only preferred embodiments of the present invention and should not be construed as limiting the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. An alumina honeycomb ceramic heating body is characterized in that: comprises an alumina honeycomb ceramic body (1), a heating printed circuit (2) and a lead (3); a porous channel (11) is arranged in the center of the alumina honeycomb ceramic body (1); the heating printed circuit (2) is arranged on the outer surface of the alumina honeycomb ceramic body (1) in a surrounding manner; the head end and the tail end of the heating printed circuit (2) are provided with leads (3);
the preparation method of the alumina honeycomb ceramic heating element comprises the following steps:
the method comprises the following steps: preparing the alumina ceramic tube pug: adding 0.01-0.05 part by weight of magnesium nitrate, 0.01-0.05 part by weight of zirconium oxychloride, 0.01-0.05 part by weight of yttrium nitrate, 1.5-2.5 parts by weight of oleic acid, 1-2 parts by weight of lubricant, 3-15 parts by weight of binder and 10-30 parts by weight of deionized water into 100 parts by weight of nano alumina powder, putting into a mixer, and mixing at the temperature of below 30 ℃ for 1-5 hours to prepare alumina honeycomb ceramic pug which is uniformly dispersed and has a solid content of 75-85% for later use;
step two: forming the alumina honeycomb ceramic: adding the alumina honeycomb ceramic pug prepared in the step one into a screw type ceramic extrusion forming machine with a vacuum defoaming device, and extruding the ceramic pug into a hollow and thin-wall honeycomb ceramic blank through a die head under the pushing of a screw;
step three: drying the alumina honeycomb ceramic blank: transferring the ceramic blank prepared in the step two to an oven, and drying and dehydrating for 5-10 minutes under the condition of hot air at 40-50 ℃ to obtain a ceramic green body with the appearance and the straightness meeting the requirements;
step four: gel discharging of the alumina ceramic green tube: biscuit firing the ceramic green body prepared in the step three at 1100-1200 ℃ to obtain a ceramic biscuit firing blank;
step five: firing of alumina ceramics: firing the biscuit ceramic in the step four in a high-temperature molybdenum tube at 1600-1800 ℃ in a hydrogen atmosphere or directly in air to obtain alumina honeycomb ceramic;
step six: the surface of the alumina ceramic tube is heated and printed with a circuit and the lead thereof is manufactured: and (4) printing a thick-film electric heating wire on the outer surface of the alumina ceramic tube prepared in the fifth step by adopting a screen printing technology, coating silver solder on a pad to stick the wire after the printed circuit is dried, putting the wire into the oven for drying again, then transferring the wire into a normal-pressure hydrogen furnace for sintering at 800-1500 ℃ to obtain a heating element of the wire co-fired alumina honeycomb ceramic body (1), and simultaneously completing silver brazing of the wire in the furnace.
2. An alumina honeycomb ceramic heat-generating body as described in claim 1, characterized in that: the purity of the nano alumina powder used in the step one is more than or equal to 99.99 percent, the particle diameter is 350nm, and the specific surface area is 7m2/g。
3. An alumina honeycomb ceramic heat-generating body as described in claim 1, characterized in that: the density of the alumina honeycomb ceramic body (1) is not less than 3.86g/cm3。
4. An alumina honeycomb ceramic heat-generating body as described in claim 1, characterized in that: the resistance of the alumina honeycomb ceramic body (1) is 0.1-2 omega.
5. An alumina honeycomb ceramic heat-generating body as described in claim 1, characterized in that: the aluminum oxide honeycomb ceramic body (1) is a cylindrical body with a circular or square or polygonal section, and a porous channel (11) in the center of the aluminum oxide honeycomb ceramic body is a square hole or a round hole or other polygonal holes which are uniformly distributed.
6. An alumina honeycomb ceramic heat-generating body as described in claim 1, characterized in that: the aperture of the porous channel (11) is 0.1-2 mm; the wall thickness of the porous channel (11) is 0.1-0.5 mm.
7. An alumina honeycomb ceramic heat-generating body as described in claim 1, characterized in that: the printing thickness of the heating printed circuit (2) is 0.005-0.05 mm.
8. An alumina honeycomb ceramic heat-generating body as described in claim 1, characterized in that: the wire (3) is made of copper, silver and nickel, and has a diameter of 0.1-0.3 mm.
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| CN201910409470.6A CN110022622B (en) | 2019-05-16 | 2019-05-16 | Alumina honeycomb ceramic heating body and preparation method thereof |
| EP20805728.1A EP3970524A4 (en) | 2019-05-16 | 2020-05-14 | Heating-air-type e-cigarette heater, ceramic heating body and preparation method therefor |
| SG11202112672XA SG11202112672XA (en) | 2019-05-16 | 2020-05-14 | An air-heating type heat not burn heating device, a ceramic heating element and a preparation method thereof |
| PCT/CN2020/090241 WO2020228773A1 (en) | 2019-05-16 | 2020-05-14 | Heating-air-type e-cigarette heater, ceramic heating body and preparation method therefor |
| KR1020217039752A KR20220008292A (en) | 2019-05-16 | 2020-05-14 | Air heated electronic cigarette heater, ceramic heating element and manufacturing method |
| UAA202106365A UA128048C2 (en) | 2019-05-16 | 2020-05-14 | Heating-air-type e-cigarette heater, ceramic heating body and preparation method therefor |
| AU2020276530A AU2020276530B2 (en) | 2019-05-16 | 2020-05-14 | Air-heating type heat not burn heating device, ceramic heating element and preparation method thereof |
| MX2021013935A MX2021013935A (en) | 2019-05-16 | 2020-05-14 | Heating-air-type e-cigarette heater, ceramic heating body and preparation method therefor. |
| CA3139872A CA3139872A1 (en) | 2019-05-16 | 2020-05-14 | An air-heating type heat not burn heating device, a ceramic heating element and a preparation method thereof |
| BR112021022827A BR112021022827A2 (en) | 2019-05-16 | 2020-05-14 | Air heating electronic cigarette heater, ceramic heating element and manufacturing method thereof |
| JP2021566977A JP7292756B2 (en) | 2019-05-16 | 2020-05-14 | Air-heated electronic cigarette heater, ceramic heating element and manufacturing method thereof |
| ZA2021/08572A ZA202108572B (en) | 2019-05-16 | 2021-11-02 | An air-heating type heat not burn heating device, a ceramic heating element and a preparation method thereof |
| US17/517,686 US20220053830A1 (en) | 2019-05-16 | 2021-11-03 | Air-heating type heat not burn heating device, ceramic heating element and preparation method thereof |
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| JP7292756B2 (en) * | 2019-05-16 | 2023-06-19 | 厦門蜂涛陶瓷有限公司 | Air-heated electronic cigarette heater, ceramic heating element and manufacturing method thereof |
| CN110447959A (en) * | 2019-07-23 | 2019-11-15 | 深圳麦克韦尔科技有限公司 | Atomizing component and electronic atomization device |
| CN110563466A (en) * | 2019-09-25 | 2019-12-13 | 深圳市辰昱科技有限公司 | porous ceramic heating element and preparation method thereof |
| CN110810931A (en) * | 2019-10-16 | 2020-02-21 | 范文丽 | Ceramic heating wire |
| CN110664017B (en) * | 2019-11-05 | 2022-08-16 | 深圳市新宜康科技股份有限公司 | Method for alternately heating multiple heating bodies of atomizer and atomizer |
| TWI821573B (en) * | 2020-06-15 | 2023-11-11 | 財團法人紡織產業綜合研究所 | Electrothermal fabric |
| CN112056631A (en) * | 2020-08-31 | 2020-12-11 | 深圳陶陶科技有限公司 | Low-temperature electronic cigarette heating pipe and preparation method thereof |
| WO2023155518A1 (en) * | 2022-02-17 | 2023-08-24 | 海南摩尔兄弟科技有限公司 | Heating element and electronic atomization device |
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