WO2023179109A1 - Appareil de génération d'aérosol et dispositif de chauffage associé, et matériau de préparation de dispositif de chauffage - Google Patents

Appareil de génération d'aérosol et dispositif de chauffage associé, et matériau de préparation de dispositif de chauffage Download PDF

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Publication number
WO2023179109A1
WO2023179109A1 PCT/CN2022/138158 CN2022138158W WO2023179109A1 WO 2023179109 A1 WO2023179109 A1 WO 2023179109A1 CN 2022138158 W CN2022138158 W CN 2022138158W WO 2023179109 A1 WO2023179109 A1 WO 2023179109A1
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WIPO (PCT)
Prior art keywords
conductive layer
heating element
conductive
layer
oxide
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PCT/CN2022/138158
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English (en)
Chinese (zh)
Inventor
韩达
范农杰
张幸福
周宏明
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深圳麦克韦尔科技有限公司
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Publication of WO2023179109A1 publication Critical patent/WO2023179109A1/fr

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    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24F—SMOKERS' REQUISITES; MATCH BOXES; SIMULATED SMOKING DEVICES
    • A24F40/00—Electrically operated smoking devices; Component parts thereof; Manufacture thereof; Maintenance or testing thereof; Charging means specially adapted therefor
    • A24F40/40—Constructional details, e.g. connection of cartridges and battery parts
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24F—SMOKERS' REQUISITES; MATCH BOXES; SIMULATED SMOKING DEVICES
    • A24F40/00—Electrically operated smoking devices; Component parts thereof; Manufacture thereof; Maintenance or testing thereof; Charging means specially adapted therefor
    • A24F40/40—Constructional details, e.g. connection of cartridges and battery parts
    • A24F40/46—Shape or structure of electric heating means
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24F—SMOKERS' REQUISITES; MATCH BOXES; SIMULATED SMOKING DEVICES
    • A24F40/00—Electrically operated smoking devices; Component parts thereof; Manufacture thereof; Maintenance or testing thereof; Charging means specially adapted therefor
    • A24F40/50—Control or monitoring

Definitions

  • the present invention relates to the field of atomization, and more specifically, to an aerosol generating device, a heating element thereof, and materials for preparing the heating element.
  • the aerosol generating device is a heat-not-burn atomization device that generates aerosol by heating the atomization material in a low-temperature heat-not-burn manner.
  • the heating element of the existing aerosol generating device usually consists of two parts: an insulating substrate and a conductive heating circuit coated on the insulating substrate.
  • the microstructure of the conductive heating circuit is loose and porous. This loose and porous structure is easily destroyed during repeated operation of the heating element, thus affecting the resistance stability of the heating element.
  • the wire diameter and thickness of the conductive heating circuit itself is very small, and the resistance of the conductive heating circuit is directly related to the wire diameter. Therefore, high requirements are placed on the preparation process of the conductive heating circuit.
  • the technical problem to be solved by the present invention is to provide an improved heating element, materials for preparing the heating element, and an aerosol generating device with the heating element in view of the above-mentioned defects of the prior art.
  • the technical solution adopted by the present invention to solve the technical problem is to construct a heating element for use in an aerosol generating device.
  • the heating element includes a main body; the main body includes a first conductive layer, a barrier layer and a second conductive layer. layer, wherein the barrier layer is located between the first conductive layer and the second conductive layer to separate at least a portion of the first conductive layer and the second conductive layer; the first One end of the conductive layer and one end of the second conductive layer are electrically connected.
  • the first conductive layer and the second conductive layer are conductive ceramics
  • the barrier layer is insulating ceramics.
  • the first conductive layer, the second conductive layer, and the barrier layer are all conductive ceramics, and the resistivities of the first conductive layer and the second conductive layer are less than the The resistivity of the barrier layer.
  • the first conductive layer and the second conductive layer are symmetrically disposed on two opposite sides of the barrier layer.
  • the first conductive layer, the second conductive layer and the barrier layer are respectively composed of several layers of first conductive layer blanks, several layers of second conductive layer blanks and several layers of barrier layer blanks. formed after sintering.
  • the main body part is prepared in one step by a co-sintering method after laminating the several layers of first conductive layer blanks, the several layers of barrier layer blanks, and the several layers of second conductive layer blanks. get.
  • the heating element further includes a conductive connection portion disposed at one end of the main body portion to electrically conduct the first conductive layer and the second conductive layer.
  • the conductive connection portion is electrically connected to a portion of the first conductive layer and the second conductive layer extending out of the barrier layer.
  • the heating element further includes a protective layer disposed on the outer surface of the main body.
  • the main body portion has a first end and a second end opposite to the first end, and the first conductive layer and the second conductive layer extend from the first end to the third end.
  • the resistivities at both ends are consistent or inconsistent.
  • the heating element further includes a first electrode and a second electrode connected to the other ends of the first conductive layer and the second conductive layer respectively.
  • the present invention also provides a material for preparing the heating element as described in any one of the above, including a conductive material for preparing the first conductive layer and the second conductive layer and a conductive material for preparing the barrier layer.
  • a conductive material for preparing the first conductive layer and the second conductive layer and a conductive material for preparing the barrier layer.
  • a barrier material a barrier material; the conductive material includes a first ceramic phase and a first metal phase, and the barrier material includes a second ceramic phase.
  • the weight ratio of the first metal phase to the first ceramic phase is between 30/70 and 70/30.
  • the first metal phase includes at least one of Ni, Fe, Cu, Co, and stainless steel.
  • the first ceramic phase and the second ceramic phase each include a ceramic body material including alumina, zirconium oxide, cerium oxide, titanium oxide, manganese oxide, chromium oxide, oxide At least one of iron, nickel oxide, yttrium oxide, lanthanum oxide, samarium oxide, niobium oxide, molybdenum oxide, and zinc oxide.
  • the first ceramic phase and/or the second ceramic phase further includes a doping element doped into the ceramic bulk material.
  • the barrier material further includes a second metallic phase.
  • the second metal phase includes at least one of Ni, Fe, Cu, Co, and stainless steel.
  • the weight ratio of the first metallic phase to the first ceramic phase is greater than the weight ratio of the second metallic phase to the second ceramic phase.
  • the present invention also provides an aerosol generating device, including the heating element described in any one of the above.
  • the heating element of the invention is an integrated heating element and does not require additional conductive lines; the heating element has a compact and dense structure that is not easily damaged, has high mechanical strength and good resistance stability; and the heating element The whole body heats up evenly.
  • Figure 1 is a schematic cross-sectional structural view of the heating element in the first embodiment of the present invention
  • FIG. 2 is a schematic diagram of the preparation process of the heating element shown in Figure 1;
  • Figure 3 is a schematic cross-sectional structural view of the heating element in the second embodiment of the present invention.
  • FIG 4 is a schematic diagram of the preparation process of the heating element shown in Figure 3;
  • Figure 5 is a schematic diagram of the preparation process of the heating element in the third embodiment of the present invention.
  • Figure 6 is a schematic cross-sectional structural view of the heating element in the fourth embodiment of the present invention.
  • FIG. 7 is a schematic diagram of the preparation process of the heating element shown in Figure 6;
  • Figure 8 is a schematic three-dimensional structural diagram of the aerosol generating device in use in some embodiments of the present invention.
  • Fig. 9 is a schematic cross-sectional structural view of the aerosol generating device shown in Fig. 8.
  • first and second are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of indicated technical features. Therefore, features defined as “first” and “second” may explicitly or implicitly include at least one of these features.
  • “plurality” means at least two, such as two, three, etc., unless otherwise expressly and specifically limited.
  • connection In the present invention, unless otherwise clearly stated and limited, the terms “installation”, “connection”, “connection”, “fixing” and other terms should be understood in a broad sense. For example, it can be a fixed connection or a detachable connection. , or integrated into one; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be an internal connection between two elements or an interactive relationship between two elements, unless otherwise specified restrictions. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
  • a first feature being “on” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. touch.
  • the terms “above”, “above” and “above” the first feature is above the second feature may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is higher in level than the second feature.
  • "Below”, “below” and “beneath” the first feature to the second feature may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature has a smaller horizontal height than the second feature.
  • the heating element 10 in the first embodiment of the present invention includes a main body 11 and a conductive connection part 12 provided at one end of the main body 11 .
  • the heating element 10 can be in various shapes such as sheet, columnar or needle shape.
  • the main body part 11 is co-fired from the first conductive layer 111, the barrier layer 112 and the second conductive layer 113.
  • the first conductive layer 111 and the second conductive layer 113 have low resistivity, and their function is to generate heat after being energized to generate heat to heat the aerosol to form the matrix.
  • the barrier layer 112 is disposed between the first conductive layer 111 and the second conductive layer 113, and may be made of insulating material or have high resistivity.
  • the barrier layer 112 in the middle separates the first conductive layer 111 and the second conductive layer 113 on both sides thereof to prevent short circuit between the first conductive layer 111 and the second conductive layer 113 on both sides.
  • the conductive connection part 12 has low resistivity, and its function is to electrically conduct the first conductive layer 111 and the second conductive layer 113, so that the heating element 10 has a current loop formed in the working state.
  • the main body part 11 has a symmetrical structure, that is, the first conductive layer 111 and the second conductive layer 113 have the same composition and the same structural dimensions (such as length, width, thickness dimensions), and the barrier layer 112 is located in the middle of the main body part 11 In this way, the main body portion 11 will not bend due to inconsistent stress on both sides during the co-sintering process.
  • the compositions of the first conductive layer 111 and the second conductive layer 113 may also be different, and/or the structural dimensions of the first conductive layer 111 and the second conductive layer 113 may also be different.
  • the main body part 11 has a first end 114 and a second end 115 that are oppositely arranged.
  • the conductive connection part 12 is provided at the first end 114 of the main body part 11 to connect the first conductive layer 111 and the second conductive layer 113 to the first end 114 Series conduction.
  • the resistivities of the first conductive layer 111 and the second conductive layer 113 from the first end 114 to the second end 115 may be consistent or inconsistent.
  • the resistivities of the first conductive layer 111 and the second conductive layer 113 from the first end 114 to the second end 115 are the same to ensure uniform heat generation.
  • the resistivity of the first end 114 of the first conductive layer 111 and the second conductive layer 113 is greater than the resistivity of the second end 115 of the first conductive layer 111 and the second conductive layer 113 to be suitable for the first end 114 The demand for higher temperature and lower temperature of the second end 115.
  • the resistivity of the first conductive layer 111 and the second conductive layer 113 gradually decreases from the first end 114 to the second end 115 to meet the requirement that the temperature of the first end 114 to the second end 115 gradually decreases.
  • the resistance of the conductive connection part 12 can be controllable and adjustable through a controllable short-circuit process, thereby making the temperature field of the heating element 10 controllable and adjustable.
  • the heating element 10 further includes a first electrode 131 and a second electrode 132.
  • the first electrode 131 and the second electrode 132 are respectively connected to and electrically conductive with the second end 115 of the first conductive layer 111 and the second conductive layer 113. .
  • the first electrode 131 and the second electrode 132 have low resistivity, and function as positive and negative electrodes to connect to external power sources.
  • the first electrode 131 and the second electrode 132 may be electrode wires, such as aluminum wires or silver wires.
  • the first electrode 131 and the second electrode 132 can be respectively connected to the end surface or side surface of the second end 115 by welding or other methods.
  • the heating element 10 may further include a protective layer 14 disposed on the outer surface of the main body 11 and/or the conductive connection part 12 .
  • the protective layer 14 can be a glass glaze layer or a ceramic coating, and its thickness is generally less than 0.1 mm.
  • the protective layer 14 can protect the main body part 11 and/or the conductive connection part 12 located inside it, reduce the erosion effect of oxygen and impurities on the main body part 11 and/or the conductive connection part 12, and prevent the main body part 11 and/or the conductive connection part 12 from being heated.
  • the conductive connection part 12 reacts with the aerosol-forming matrix to extend the life of the heating element 10 , improve the surface smoothness of the heating element 10 , and reduce the adhesion of the heated aerosol-forming matrix on the heating element 10 .
  • the heating element 10 in the present invention is an integrated heating element and does not require additional conductive circuits. It is itself a heating element.
  • the main body part 11 generates heat as a whole, thereby having the characteristics of uniform heat generation.
  • the integrated heating element 10 has high mechanical strength, so that it can be used both as a heating element for generating heat and as a supporting body for support.
  • the heating element 10 since the main body 11 of the heating element 10 has stable metal or semiconductor temperature coefficient characteristics, the heating element 10 itself can also be used as a thermocouple to achieve precise temperature control.
  • the main body 11 can be a ceramic structure and can be prepared by high-temperature sintering. Its structure is compact and dense, not easily damaged, and has good resistance stability. It should be noted that the first conductive layer 111 and the second conductive layer 113 can each be formed by stacking several layers of conductive layer blanks and then sintering, and the barrier layer 112 can be formed by stacking several layers of barrier layer blanks and then sintering them.
  • the conductive material of the first conductive layer 111 and the second conductive layer 113 is a first conductive ceramic with low resistivity, such as a first cermet.
  • the first cermet is a composite oxide of metal and ceramic, which includes a first ceramic phase and a first metal phase.
  • the first metal phase may be one of Ni, Fe, Cu, Co, and stainless steel, or any combination thereof (including alloys).
  • the first metal phase does not contain precious metals and therefore is less expensive. In other embodiments, the first metal phase may also include noble metals without considering cost.
  • the addition of the first ceramic phase has two functions: one is to regulate the resistivity of the first cermet, and the other is to improve the mechanical properties of the first cermet.
  • the first ceramic phase may be one of aluminum oxide, zirconium oxide, cerium oxide, titanium oxide, manganese oxide, chromium oxide, iron oxide, nickel oxide, yttrium oxide, lanthanum oxide, samarium oxide, niobium oxide, molybdenum oxide, and zinc oxide. species or any combination between them.
  • the ceramic bulk material of the first ceramic phase can also be doped and replaced with appropriate element types (such as yttrium, zirconium, aluminum, samarium or gadolinium, etc.) and doping amounts in order to appropriately improve the structure of the first ceramic phase. stability and improve its mechanical properties.
  • doping zirconia with yttrium can improve the phase structure stability of zirconia
  • doping alumina with zirconium can improve the toughness of alumina. It is worth noting that no matter what element is used and how much doping amount is used for doping and substitution of the ceramic body material, it is within the protection scope of the present invention.
  • the resistivity of the first cermet is related to the material composition of the first metal phase and the first ceramic phase, the morphology of their respective powders, the ratio of the first metal phase to the first ceramic phase, sintering density and other parameters.
  • the resistivity of the first cermet can be controlled by controlling relevant parameters.
  • the weight ratio of the first metal phase to the first ceramic phase is between 30/70 and 70/30.
  • the resistivity of the first cermet may be 1*10 -5 ⁇ m ⁇ 10*10 -5 ⁇ m.
  • the first metal phase is nano-copper powder
  • the first ceramic phase is yttrium-doped zirconia (3YSZ: Y 0.03 Zr 0.97 O 2 ) micron powder
  • the weight ratio of copper to 3YSZ is 30:70
  • the first The resistivity of cermet is 6*10 -5 ⁇ m.
  • the first metal phase is 430L stainless steel micron powder and the first ceramic phase is yttrium-doped zirconia (3YSZ: Y 0.03 Zr 0.97 O 2 ) micron powder
  • the weight ratio of 430L stainless steel to 3YSZ is 40:60.
  • the first When the porosity of cermet is 97%, its resistivity is 4*10 -5 ⁇ m.
  • the first metal phase is 430L stainless steel micron powder
  • the first ceramic phase is samarium-doped cerium oxide (SDC: Sm 0.2 Ce 0.8 O 2 ) nanopowder
  • the weight ratio of 430L stainless steel to SDC is 70:30
  • the The resistivity of a cermet is 5*10 -5 ⁇ m.
  • the barrier material of barrier layer 112 may be an insulating material, such as an insulating ceramic, which includes a second ceramic phase.
  • the second ceramic phase may be aluminum oxide, zirconium oxide, cerium oxide, titanium oxide, manganese oxide, chromium oxide, iron oxide, nickel oxide, yttrium oxide, lanthanum oxide, samarium oxide, niobium oxide, molybdenum oxide, zinc oxide One or any combination between them.
  • the ceramic bulk material of the second ceramic phase can be doped and replaced with appropriate element types (such as yttrium, zirconium, aluminum, samarium or gadolinium, etc.) and doping amounts, in order to appropriately improve the structure of the second ceramic phase.
  • doping zirconia with yttrium can improve the phase structure stability of zirconia; doping alumina with zirconium can improve the toughness of alumina. It is worth noting that no matter what element is used and how much doping amount is used for doping and substitution of the ceramic body material, it is within the protection scope of the present invention.
  • the barrier layer 112 may also be made of barrier material with high resistivity. Compared with the conductive materials of the first conductive layer 111 and the second conductive layer 113, the barrier material of the barrier layer 112 has a higher resistivity. In some embodiments, the resistivity of the barrier layer 112 is at least 100 times greater than the resistivities of the first conductive layer 111 and the second conductive layer 113 .
  • the barrier material of the barrier layer 112 may have the same chemical elements as the conductive materials of the first conductive layer 111 and the second conductive layer 113 but have different resistivities.
  • the barrier material of the barrier layer 112 may also be a composite oxide of metal and ceramic, that is, a second cermet, which includes a second ceramic phase and a second metal phase.
  • the second metal phase may be one of Ni, Fe, Cu, Co and stainless steel, or any combination thereof (including alloys).
  • the first ceramic phase may be one of aluminum oxide, zirconium oxide, cerium oxide, titanium oxide, manganese oxide, chromium oxide, iron oxide, nickel oxide, yttrium oxide, lanthanum oxide, samarium oxide, niobium oxide, molybdenum oxide, and zinc oxide. species or any combination between them.
  • the ceramic bulk material of the second ceramic phase can be doped and replaced with appropriate element types (such as yttrium, zirconium, aluminum, samarium or gadolinium, etc.) and doping amounts, in order to appropriately improve the structure of the second ceramic phase. stability and improve its mechanical properties.
  • doping zirconia with yttrium can improve the phase structure stability of zirconia
  • doping alumina with zirconium can improve the toughness of alumina. It is worth noting that no matter what element is used and how much doping amount is used to dope and replace the ceramic body material of the second ceramic phase, it is within the protection scope of the present invention.
  • a second cermet with high resistivity By adjusting the ratio of the second metal phase to the second ceramic phase, a second cermet with high resistivity can be obtained.
  • the resistivity of the second cermet is related to the material composition of the second metal phase and the second ceramic phase, the morphology of their respective powders, the ratio of the second metal phase to the second ceramic phase, sintering density and other parameters.
  • the resistivity of the second cermet can be controlled by controlling relevant parameters.
  • the ratio of the second metal phase to the second ceramic phase in the second cermet is lower, that is, the weight ratio of the second metal phase to the second ceramic phase is smaller than that of the first metal phase to the first ceramic phase.
  • the weight ratio of the resistivity of the barrier layer 112 is higher than that of the first conductive layer 111 and the second conductive layer 113 .
  • the current preferentially passes through the first conductive layer 111 and the second conductive layer 113 .
  • the heating element 10 is a columnar heating element and has a sandwich structure.
  • the lengths of the first conductive layer 111 , the barrier layer 112 and the second conductive layer 113 along the direction from the first end 114 to the second end 115 are equal, and the first conductive layer 111 , the barrier layer 112 and the second conductive layer 113 are at the first end.
  • the end surfaces of 114 and the second end 115 are respectively flush, so that the barrier layer 112 located in the middle completely separates the first conductive layer 111 and the second conductive layer 113 located on both sides thereof.
  • the conductive connection portion 12 can be formed by subjecting the first end 114 of the main body portion 11 to conductive treatment.
  • stainless steel solder is used to conduct conductive treatment on the end surface of the first end 114 to form the conductive connection portion 12 .
  • the solder is not limited to stainless steel solder.
  • it can also be silver copper solder, pure silver solder or nickel solder.
  • the conductive treatment is not limited to welding.
  • the conductive connection portion 12 can also be formed by printing, plating, or physical deposition.
  • the heating element 10 can be prepared through the following preparation process:
  • Preparation of the conductive layer blank Take an appropriate amount of metal powder, ceramic powder and mixture and uniformly mix and disperse them, and then prepare the conductive layer blank A based on the dispersed mixture;
  • the preparation of the barrier layer blank B can be achieved in the following two ways:
  • barrier layer blank B based on the dispersed mixture; this method is suitable for the case where the barrier material of barrier layer 112 is insulating ceramic;
  • the main body 11 is prepared by laminating several layers of conductive layer blanks A, several layers of barrier layer blanks B, and several layers of conductive layer blanks A through a high-temperature co-sintering method in one step.
  • the structure has high strength and the preparation process is simple.
  • the conductive layer blank A and the barrier layer blank B can be prepared by processes such as tape casting or dry pressing, and the entire blank C can be prepared by processes such as hot pressing or warm isostatic pressing.
  • the sizes of the conductive layer blank A and the barrier layer blank B in this embodiment are the same.
  • Figures 3-4 show the heating element 10 in the second embodiment of the present invention.
  • the heating element 10 in this embodiment is a needle-shaped heating element.
  • the end 114 is rounded, for example, can be sharpened, in order to reduce the friction force between the heating element 10 and the aerosol-forming substrate, so as to facilitate the insertion of the heating element 10 into the aerosol-forming substrate.
  • Example 1 430L/3YSZ needle-shaped heating element 10
  • the 430L/3YSZ weight ratio of 40:60 weigh 20g of 430L (5 microns) and 30g of 3YSZ (Y 0.03 Zr 0.97 O 2 ), then weigh 1.5g of triethanolamine (TEA) and 30g of alcohol, and add them to the roller ball mill tank. Disperse by ball milling for 8 hours, then add 1.4g polyethylene glycol (PEG400), 1.2g dibutyl phthalate (DBP) and 1.5g polyvinyl butyral (PVB) and continue ball milling for 8 hours to prepare a product with suitable viscosity.
  • the slurry for tape casting is prepared by the tape casting method using a knife height of 300 microns to obtain the conductive layer blank A (100mm*100mm).
  • 3YSZ ceramic powder 1.1g of triethanolamine (TEA) and 30g of alcohol, add them to a roller ball mill tank and ball mill to disperse for 8 hours, then add 0.9g of polyethylene glycol (PEG400), 1g of dibutyl phthalate ( DBP) and 1g polyvinyl butyral (PVB) were continuously ball-milled for 8 hours to prepare a slurry with suitable viscosity for casting.
  • the barrier layer blank B (100mm*100mm) was prepared using the casting method using a knife height of 300 microns. .
  • Four layers of conductive layer blank A, one layer of barrier layer blank B and four layers of conductive layer blank A are laminated together in sequence.
  • the entire green body C was placed in the air at 500°C for debinding treatment for 4 hours, and then placed in a vacuum furnace for sintering treatment at 1400°C for 4 hours to obtain a sintered body D with a sandwich structure.
  • the sintered body D is then cut into several cylinders E with a diameter of 1.95mm and a length of 22mm using a diamond wire cutting machine. Using machining, one end of the cylinder E is sharpened to obtain the main body 11.
  • the first electrode 131 and the second electrode 132 are respectively welded to the rear end of the main body 11 (the end away from the needle tip).
  • a glass glaze layer is prepared on the main body part 11 and the conductive connection part 12 to form a protective layer 14 .
  • the 430L/3YSZ needle-shaped heating element 10 is completed.
  • the mechanical strength of the needle-shaped heating element 10 material was measured to be 450 MPa.
  • the TCR (temperature coefficient of resistance) of the heating element 10 is 1300ppm, and its linearity is extremely high, making it easy to control temperature.
  • the stability test shows that the resistance of the heating element 10 has zero attenuation after 6,000 dry-burning cycle tests (heating to 350°C for 2 minutes, then turning off the power and cooling to room temperature, which is one cycle).
  • Example 2 316L/SDC needle-shaped heating element 10
  • the entire green body C was placed in the air at 500°C for debinding treatment for 4 hours, and then placed in a vacuum furnace for sintering treatment at 1400°C for 4 hours to obtain a sintered body D with a sandwich structure.
  • the sintered body D is then cut into several cylinders E with a diameter of 1.95mm and a length of 22mm using a diamond wire cutting machine. Using machining, one end of the cylinder E is sharpened to obtain the main body 11.
  • the first electrode 131 and the second electrode 132 are respectively welded to the rear end of the main body 11 (the end away from the needle tip).
  • a glass glaze layer is prepared on the main body part 11 and the conductive connection part 12 to form a protective layer 14 .
  • the 316L/SDC needle-shaped heating element 10 is completed.
  • the mechanical strength of the needle-shaped heating element 10 was measured to be 450 MPa.
  • the TCR of the heating element 10 is 1250 ppm, and its linearity is extremely high, making it easy to control temperature.
  • the stability test shows that the resistance of the heating element 10 has zero attenuation after 5,000 dry-burning cycle tests (heating to 350°C for 2 minutes, then turning off the power and cooling to room temperature, which is one cycle).
  • the Cu/3YSZ weight ratio of 30:70 weigh 15g of Cu (5 microns) and 35g of 3YSZ (Y 0.03 Zr 0.97 O 2 ), then weigh 1.5g of triethanolamine (TEA) and 40g of alcohol, and add them to the roller ball mill tank. Disperse by ball milling for 8 hours, then add 1.4g polyethylene glycol (PEG400), 1.2g dibutyl phthalate (DBP) and 1.5g polyvinyl butyral (PVB) and continue ball milling for 8 hours to prepare a product with appropriate viscosity.
  • the slurry for tape-casting was prepared using the tape-casting method with a knife height of 300 microns to obtain the conductive layer blank A (100mm*100mm).
  • conductive layer blank A Four layers of conductive layer blank A, one layer of barrier layer blank B and four layers of conductive layer blank A are laminated together in sequence. After vacuum molding, they are pressed into a whole blank C using warm isostatic pressing. The entire green body C was placed in the air at 500°C for debinding treatment for 4 hours, and then placed in a vacuum furnace for sintering treatment at 1050°C for 4 hours to obtain a sintered body D with a sandwich structure. The sintered body D is then cut into several cylinders E with a diameter of 1.95mm and a length of 22mm using a diamond wire cutting machine. Using machining, one end of the cylinder E is sharpened to obtain the main body 11.
  • the needle tip of the main body part 11 is conductively processed using stainless steel solder to form a conductive connection part 12.
  • the first electrode 131 and the second electrode 132 are respectively welded to the rear end of the main body 11 (the end away from the needle tip).
  • a glass glaze layer is prepared on the main body part 11 and the conductive connection part 12 to form a protective layer 14 .
  • the Cu/3YSZ needle-shaped heating element 10 is completed.
  • the mechanical strength of the needle-shaped heating element 10 material was measured to be 160 MPa.
  • the TCR of the heating element 10 is 1000ppm, and its linearity is extremely high, making it easy to control temperature.
  • the stability test shows that the resistance of the heating element 10 has zero attenuation after 3,000 dry-burning cycle tests (heating to 350°C for 2 minutes, then turning off the power and cooling to room temperature, which is one cycle).
  • FIG. 5 shows the heating element 10 in the third embodiment of the present invention.
  • the heating element 10 in this embodiment is a sheet-shaped heating element.
  • the 430L/3YSZ weight ratio of 40:60 weigh 20g of 430L (5 microns) and 30g of 3YSZ (Y 0.03 Zr 0.97 O 2 ), then weigh 1.5g of triethanolamine (TEA) and 30g of alcohol, and add them to the roller ball mill tank. Disperse by ball milling for 8 hours, then add 1.4g polyethylene glycol (PEG400), 1.2g dibutyl phthalate (DBP) and 1.5g polyvinyl butyral (PVB) and continue ball milling for 8 hours to prepare a product with suitable viscosity.
  • the slurry for tape casting is prepared by the tape casting method using a knife height of 300 microns to obtain the conductive layer blank A (100mm*100mm).
  • 3YSZ ceramic powder 1.1g of triethanolamine (TEA) and 30g of alcohol, add them to a roller ball mill tank and ball mill to disperse for 8 hours, then add 0.9g of polyethylene glycol (PEG400), 1g of dibutyl phthalate ( DBP) and 1g polyvinyl butyral (PVB) were continuously ball-milled for 8 hours to prepare a slurry with suitable viscosity for casting.
  • the barrier layer blank B (100mm*100mm) was prepared using the casting method using a knife height of 300 microns. . Two layers of conductive layer blank A, one layer of barrier layer blank B and two layers of conductive layer blank A are laminated together in sequence.
  • the entire green body C was placed in the air at 500°C for debinding treatment for 4 hours, and then placed in a vacuum furnace for sintering treatment at 1400°C for 4 hours to obtain a sintered body D with a sandwich structure.
  • the sintered body D is then cut and processed into a sheet-shaped main body portion 11 with a certain size and shape.
  • One end of the sheet-shaped main body 11 is conductively processed using stainless steel solder to form a conductive connection portion 12 .
  • the first electrode 131 and the second electrode 132 are respectively welded to the other end of the sheet-shaped main body 11 (the end away from the conductive connection part 12 ).
  • a glass glaze layer is prepared on the main body part 11 and the conductive connection part 12 to form a protective layer 14 .
  • the 430L/3YSZ sheet heating element 10 is completed.
  • the mechanical strength of the sheet heating element 10 material was measured to be 400MPa.
  • the TCR of the heating element 10 is 1350 ppm, and its linearity is extremely high, making it easy to control temperature.
  • the stability test shows that the resistance of the heating element 10 has zero attenuation after 6,000 dry-burning cycle tests (heating to 350°C for 2 minutes, then turning off the power and cooling to room temperature, which is one cycle).
  • Figures 6-7 show the heating element 10 in the fourth embodiment of the present invention.
  • the barrier layer 112 in this embodiment separates the first conductive layer 111 and the second conductive layer 113. Partial areas are spaced apart, and the first conductive layer 111 and the second conductive layer 113 extend out of the barrier layer 112 and are connected and connected, thereby eliminating the need to provide a conductive connection portion 12 at the first end 114 of the main body 11 .
  • the first conductive layer 111 includes a first conductive body part 1111 and a first conductive connection part 1112 located at one end of the first conductive body part 1111.
  • the second conductive layer 113 includes a second conductive body part 1131 and a first conductive connection part 1112 located at one end of the second conductive body.
  • the second conductive connection part 1132 at one end of the part 1131.
  • the barrier layer 112 is located between the first conductive body part 1111 and the second conductive body part 1131, completely separating the first conductive body part 1111 and the second conductive body part 1131.
  • the first conductive connection part 1112 extends outward from the barrier layer 112 from one end of the first conductive body part 1111, and the second conductive connection part 1132 extends outward from the barrier layer 112 from one end of the second conductive body part 1131.
  • the first conductive connection The portion 1112 and the second conductive connection portion 1132 are in contact and conductive, so that the main body portion 11 has a current loop formed in the working state.
  • the first conductive body part 1111 may be disposed at an end edge of the first conductive body part 1111 , or may be disposed adjacent to an end edge of the first conductive body part 1111 .
  • the second conductive connection portion 1132 can be disposed at an end edge of the second conductive body portion 1131 , or can be disposed adjacent to an end edge of the second conductive body portion 1131 .
  • the heating element 10 in this embodiment can also be in various shapes such as sheet, columnar or needle shape.
  • the heating element 10 in this embodiment can also be prepared in one step by using a high-temperature co-sintering method after lamination, which has high structural strength and a simple preparation process.
  • the heating element 10 can be prepared through the following preparation process:
  • Preparation of the conductive layer blank Take an appropriate amount of metal powder, ceramic powder and mixture and uniformly mix and disperse them, and then prepare the conductive layer blank A based on the dispersed mixture;
  • the preparation of the barrier layer blank B can be achieved in the following two ways:
  • barrier layer blank B based on the dispersed mixture; this method is suitable for the case where the barrier material of barrier layer 112 is insulating ceramic;
  • the length of the conductive layer blank A along the extending direction from the first end 114 to the second end 115 is greater than the length of the barrier layer blank B along the extending direction from the first end 114 to the second end 115 .
  • the end surfaces of the several layers of conductive layer blanks A and the several layers of barrier layer blanks B are kept aligned at the second end 115 flat. After sintering, the portion of the conductive layer blank A that is longer than the barrier layer blank B forms the first conductive connection portion 1112 and the second conductive connection portion 1132 .
  • FIGS 8-9 illustrate an aerosol generating device 100 in some embodiments of the present invention.
  • the aerosol generating device 100 can be used to bake and heat the aerosol-forming substrate 200 inserted therein into a non-burning state.
  • the aerosol extract in the aerosol-forming matrix 200 is released.
  • the aerosol-forming substrate 200 can be in the shape of a cylinder, and the aerosol generating device 100 can be in the shape of a generally square column. It can be understood that in other embodiments, the aerosol generating device 100 is not limited to a square columnar shape, and may also be in a cylindrical shape, an elliptical columnar shape, or other shapes.
  • the aerosol generating device 100 includes a housing 30 and a heating element 10 housed in the housing 30 , a storage tube 20 , a battery 40 , and a motherboard 50 .
  • the heating element 10 can be the heating element in any of the above embodiments.
  • the inner wall surface of the holding tube 20 defines a holding space 21 for holding the aerosol-forming matrix 200.
  • the top wall of the housing 30 is provided with a socket 31 for inserting the aerosol-forming matrix 200.
  • the aerosol-forming matrix 200 can be inserted through the socket. 31 is inserted into the containment space 21.
  • the upper end of the heating element 10 (the end provided with the conductive connection part 12) can be extended into the receiving space 21 and inserted into the aerosol-forming substrate 200, for baking and heating the aerosol-forming substrate 200 after being energized and heated.
  • the mainboard 50 is electrically connected to the battery 40 and the heating element 10 respectively. Relevant control circuits are arranged on the mainboard 50 , and the connection between the battery 40 and the heating element 10 can be controlled through the switch provided on the casing 30 .

Landscapes

  • Resistance Heating (AREA)

Abstract

L'invention concerne un appareil de génération d'aérosol (100) et un dispositif de chauffage (10), et un matériau pour préparer le dispositif de chauffage (10). Le dispositif de chauffage (10) comprend une partie corps principal (11). La partie corps principal (11) comprend une première couche conductrice (111), une couche barrière (112) et une seconde couche conductrice (113). La couche barrière (112) est située entre la première couche conductrice (111) et la seconde couche conductrice (113) de façon à espacer au moins certaines régions de la première couche conductrice (111) et de la seconde couche conductrice (113) ; et une extrémité de la première couche conductrice (111) est électriquement connectée à une extrémité de la seconde couche conductrice (113). Le dispositif de chauffage (10) est un dispositif de chauffage intégré (10) qui ne nécessite pas de ligne conductrice supplémentaire ; le dispositif de chauffage (10) a une structure compacte qui n'est pas susceptible d'être endommagée, a une résistance mécanique élevée et a une bonne stabilité de résistance ; et le dispositif de chauffage (10) émet de manière intégrée de la chaleur d'une manière uniforme.
PCT/CN2022/138158 2022-03-21 2022-12-09 Appareil de génération d'aérosol et dispositif de chauffage associé, et matériau de préparation de dispositif de chauffage WO2023179109A1 (fr)

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CN202210277762.0A CN114766725A (zh) 2022-03-21 2022-03-21 气溶胶产生装置及其发热体和用于制备发热体的材料

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Publication number Priority date Publication date Assignee Title
CN114766725A (zh) * 2022-03-21 2022-07-22 深圳麦克韦尔科技有限公司 气溶胶产生装置及其发热体和用于制备发热体的材料

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