Resistance heaters and aerosol generators used in aerosol generators

Abstract

A resistive heater (30a) for use in an aerosol generating device and an aerosol generating device, the resistive heater (30a) for use in the aerosol generating device having a resistivity of 1×10 -4 Ω cm~1.3×10 -1 The conductive ceramic has a resistance of Ω·cm. By using the conductive ceramic to heat the aerosol generating product (D), the conductive ceramic itself has a heating function, which avoids the need to print a circuit on the ceramic surface, i.e., avoids the problem of the circuit falling off due to friction during frequent use, and is beneficial for improving the user experience and the service life of the aerosol generating device.

Description

Technical Field

[0001] (Cross-Reference to Related Applications) The present application claims priority from Chinese Patent Application No. 2021116098090 filed on December 24, 2021 and Chinese Patent Application No. 2021116098230 filed on December 24, 2021, the entire contents of which are incorporated into the present application by reference.

[0002] The present application relates to the technical field of atomization, and in particular, to a resistance heater for use in an aerosol generating device and an aerosol generating device.

Background Art

[0003] Currently, resistance heaters are roughly classified into two types. One is a zirconia ceramic sheet having a thick film circuit printed on a surface thereof to form a ceramic heating sheet, and the other is an alumina rod core covered with an alumina cast sheet having a circuit printed on a surface thereof to form a ceramic heating needle. That is, both of the conventional two types of ceramic heating elements use ceramic as a carrier, and a conductive paste is printed on the carrier to form the heating element. The ceramic itself is insulated. After the resistance circuit is printed, the resistor is energized to generate heat, the heat is conducted to the ceramic, and tobacco is heated to complete the heating and atomization process.

[0004] In all conventional resistance heaters, the conductive paste needs to be printed on the surface of ceramic, after the ceramic is sintered, the printed paste needs to be processed and sintered again, which results in high cost. In addition, the thermal expansion coefficient of the resistance paste is different from that of ceramic, and frequent use and friction are likely to cause the circuit to fall off, which affects the use experience and service life of the product.

Summary of Invention

[0005] The resistance heater for use in an aerosol generating device and the aerosol generating device provided in the present application solve the technical problem in the prior art that the circuit is prone to falling off when the resistance heater is frequently used and subjected to friction.

[0006] To solve the above technical problems, the first technical solution provided in this application has a resistivity of 1 × 10 -4 Ω·cm ~ 1.3 × 10 -1 The objective is to provide a resistance heater for use in an aerosol generator, which contains a conductive ceramic with a capacitance of Ω·cm.

[0007] In one embodiment, the conductive ceramic material includes a main component and a doping component.

[0008] In one embodiment, the mass percentage of the main component in the conductive ceramic is greater than 80% and less than or equal to 98%.

[0009] In one embodiment, the mass percentage of the doping component in the conductive ceramic is greater than 0.5% and less than or equal to 19%.

[0010] In one embodiment, the main component comprises a first metal oxide, and the doping component comprises a second metal oxide. The valency of the metal in the first metal oxide is different from the valency of the metal in the second metal oxide.

[0011] In one embodiment, the valency of the metal in the first metal oxide is smaller than the valency of the metal in the second metal oxide.

[0012] In one embodiment, the main component comprises zinc oxide, and the doping component comprises at least one of aluminum oxide, zirconium dioxide, titanium dioxide, or disiniobium pentoxide.

[0013] In one embodiment, the mass percentage of zinc oxide in the conductive ceramic is 94% to 98%, and the doping component contains aluminum oxide, with the mass percentage of aluminum oxide in the conductive ceramic being 0.5% to 5%.

[0014] In one embodiment, the resistivity of the conductive ceramic is 1 × 10⁻⁶. -3 Ω·cm~6×10-2 It is located at Ω·cm.

[0015] In one embodiment, the main component comprises titanium dioxide, and the doping component comprises at least disiob pentoxide.

[0016] In one embodiment, the mass percentage of titanium dioxide in the conductive ceramic is 85% to 95%, and the mass percentage of disiob pentoxide in the conductive ceramic is 5% to 20%.

[0017] In one embodiment, the resistivity of the conductive ceramic is 8 × 10 -2 It is less than Ω·cm.

[0018] In one embodiment, the valency of the metal in the first metal oxide is greater than the valency of the metal in the second metal oxide.

[0019] In one embodiment, the main component comprises tantalum pentoxide, and the doping component comprises at least one of titanium dioxide or zirconium dioxide.

[0020] In one embodiment, the conductive ceramic further includes a conductive resistivity adjustment component for controlling the resistivity of the conductive ceramic to a target range.

[0021] In one embodiment, the conductive resistivity adjusting component includes at least one of a conductive metal carbide, a metal boride, a toner, or a conductive metal powder.

[0022] In one embodiment, the mass percentage of the conductive resistivity adjusting component in the conductive ceramic is between 1% and 19%.

[0023] In one embodiment, the resistivity of the conductive ceramic is 2 × 10 -3 Ω·cm~6×10 -2 It is located at Ω·cm.

[0024] In one embodiment, the porosity of the conductive ceramic is 0.01% to 10%.

[0025] In one embodiment, the resistance heater is configured in the shape of an elongated pin, needle, rod, or sheet, or the resistance heater is configured in the shape of a tube.

[0026] In one embodiment, the resistance of the resistor heater is 0.036Ω or more and 1.5Ω or less.

[0027] In one embodiment, the conductive ceramic comprises a conductive component and a non-conductive component, wherein the conductive component comprises at least one of conductive metal borides, metal nitrides, or metal carbides, and the non-conductive component comprises at least one of non-conductive metal oxides or metal nitrides.

[0028] In one embodiment, the conductive component includes at least one of titanium boride, titanium nitride, or titanium carbide.

[0029] In one embodiment, the non-conductive component includes at least one of silicon dioxide and zirconium dioxide.

[0030] To solve the above technical problems, the second technical solution provided in this application includes a conductive ceramic, wherein the material of the conductive ceramic includes a main component and a doping component, and the mass percentage of the main component in the conductive ceramic is greater than 80% and less than or equal to 98%. The objective is to provide a resistance heater for use in an aerosol generator, wherein the main body component contains a first metal oxide, the doping component contains a second metal oxide, and the valence of the metal in the first metal oxide is different from the valence of the metal in the second metal oxide.

[0031] To solve the above technical problem, the third technical solution provided in the present application is an aerosol generating device configured to heat an aerosol generating product to generate aerosol for smoking, comprising: a cavity for receiving an aerosol generating product; and a resistance heater which is configured to heat the aerosol generating product received in the cavity and is the resistance heater for use in the aerosol generating device according to any one of the preceding items.

[0032] The present application provides a resistance heater for use in an aerosol generating device and an aerosol generating device, wherein the resistance heater for use in the aerosol generating device has a resistivity of 1x10 -4 Ω·cm to 1.3×10 -1 Ω·cm, comprising a conductive ceramic. By heating an aerosol generating product with conductive ceramic, the conductive ceramic itself has a heating function, so that printing a circuit on the ceramic surface is avoided, that is, the problem that the circuit falls off due to friction after frequent use is avoided, which is beneficial to improving the user experience and the service life of the aerosol generating device. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly describe the technical solutions in the embodiments of the present application, the drawings required for the description of the embodiments are briefly described below. Obviously, the drawings described below are only some embodiments of the present application, and those skilled in the art can obtain other drawings based on these drawings without creative efforts. [Figure 1] It is a schematic structural diagram of an aerosol generating device provided in an embodiment of the present application. [Figure 2] It is a schematic structural diagram of a resistance heater for use in an aerosol generating device provided in an embodiment of the present application. [Figure 3] It is an exploded schematic diagram of a specific structure of the resistance heater shown in Figure 2. [Figure 4a] It is a longitudinal sectional view of a resistance heater provided in an embodiment of the present application. [Figure 4b] This is a longitudinal cross-sectional view of a resistance heater provided in another embodiment of this application. [Figure 5] Figure 2 is a schematic diagram of the structure of point A of the resistance heater used in the aerosol generator shown in Figure 2. [Figure 6] This is a schematic diagram illustrating the measurement of the resistance of a resistive heater in this application. [Figure 7] This is a schematic diagram of the structure of an aerosol generator provided in another embodiment of this application. [Figure 8] Figure 7 is a schematic diagram of the structure of one embodiment of a resistance heater in the aerosol generator provided. [Figure 9] This is a schematic diagram of the structure of an aerosol generator provided in another embodiment of this application. [Figure 10] Figure 9 is a schematic diagram of the atomizer structure in the aerosol generator provided. [Figure 11] Figure 10 is a schematic diagram of the heating assembly in the atomizer provided. [Modes for carrying out the invention]

[0034] The following describes the technical solutions in the embodiments of this application clearly and completely with reference to the drawings of the embodiments of this application. Naturally, the embodiments described are only a part of the embodiments of this application, not all of them. All other embodiments obtained by a person skilled in the art based on the embodiments of this application without requiring any creative effort are all within the scope of protection of this application.

[0035] The following description provides specific details, such as the system structure, interfaces, and technology, for illustrative purposes only, not limitation, to enable a complete understanding of this application.

[0036] The terms “first,” “second,” and “third” in this application are for descriptive purposes only and should not be understood as indicating or implying relative importance or the number of technical features described. Accordingly, features designated as “first,” “second,” and “third” may be explicitly or implicitly implied to include at least one of the aforementioned features. In the description of this application, unless explicitly and specifically limited, “multiple” means at least two, e.g., two, three, etc. All directional indications in the embodiments of this application (e.g., up, down, left, right, front, back, etc.) are merely for describing the relative positional relationships, motions, etc., between the members in a particular orientation (as shown in the drawings), and the directional indications change accordingly when the particular orientation changes. Furthermore, the terms “include,” “have,” and any variations thereof in the embodiments of this application are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus comprising a series of steps or units may, but is not limited to, optionally include further steps or units not listed, or optionally include other steps or assemblies specific to those processes, methods, products, or apparatus.

[0037] As used herein, “Examples” means that any particular feature, structure, or characteristic described in relation to an example may be included in at least one example of this application. The terms used herein, as used elsewhere in the specification, do not necessarily refer to the same example, nor do they necessarily refer to an example that is exclusively independent or alternative to another example. Those skilled in the art will understand, both explicitly and implicitly, that the examples described herein can be combined with other examples.

[0038] The present application will be described in detail below with reference to the drawings and embodiments.

[0039] Figure 1 is a schematic diagram of the structure of an aerosol generator provided in one embodiment of the present application, in which an aerosol generator is provided, the structure of which the aerosol generator includes a cavity, a power supply assembly 10, a circuit 20 and a resistor heater 30a.

[0040] Here, the aerosol generating product D is removably received in the cavity. The aerosol generating product D preferably employs a tobacco-containing material that releases volatile compounds from the substrate when heated, or it may be a non-tobacco material suitable for generating smoke by electric heating after heating. The aerosol generating product D preferably employs a solid substrate, which may include one or more powders, granules, elongated fragments, strips or flakes of one or more vanilla leaves, tobacco leaves, homogenized tobacco, or expanded tobacco, or the solid substrate may include additional tobacco or non-tobacco volatile flavor compounds that are released when the substrate is heated.

[0041] At least a portion of the resistive heater 30a extends into the cavity, and when the aerosol generating product D is received into the cavity, the resistive heater 30a is inserted into the aerosol generating product D and heated, causing the aerosol generating product D to release several types of volatile compounds, which are formed solely by the heat treatment. In a specific embodiment, the resistive heater 30a has a free front end and a terminal end facing each other along its length, and below, one end inserted into the aerosol generating product D is defined as the free front end, and the other end for fixing to or assembling with another assembly is defined as the terminal end. The power supply assembly 10 is used to supply power, and the circuit 20 is used to conduct current between the power supply assembly 10 and the resistive heater 30a.

[0042] The resistive heater 30a is made of conductive ceramic material. Compared to the prior art, the conductive ceramic itself has conductive properties, avoiding the need to print circuits on the ceramic surface. This avoids the problem of circuits falling off due to friction from frequent use, which is advantageous for improving the user experience and the lifespan of the aerosol generator. The resistive heater 30a may be made entirely of conductive ceramic material or partially of conductive ceramic material, and the specific design will be determined as needed.

[0043] In one embodiment, the resistance heater 30a is configured in the shape of an elongated pin, needle, rod, stick, or sheet, and can be inserted into the aerosol generating product D during use to heat the aerosol generating product D. In another embodiment, the resistance heater 30a is configured in the shape of a tube, and the aerosol generating product D is heated by being received inside the tube. The shape and size of the resistance heater 30a are designed as needed, as long as they can atomize the aerosol generating product D well.

[0044] This application provides a resistive heater 30a, specifically with reference to Figures 2 to 4b, of which Figure 2 is a schematic diagram of the structure of a resistive heater provided in one embodiment of this application, Figure 3 is an exploded schematic diagram of a specific structure of the resistive heater shown in Figure 2, Figure 4a is a longitudinal cross-sectional view of a resistive heater provided in one embodiment of this application, and Figure 4b is a longitudinal cross-sectional view of a resistive heater provided in another embodiment of this application. In one embodiment, a resistive heater 30a is provided, which includes a conductive ceramic body 31b, a first lead wire 32b, a second lead wire 33b, and a substrate 34a.

[0045] Here, the conductive ceramic body 31b is inserted into the aerosol generating product D to heat the aerosol generating product D when an electric current is applied. Referring to Figure 3, the conductive ceramic body 31b is configured to extend along the longitudinal direction of the resistance heater 30a and to have a first end B and a second end C facing each other along the longitudinal direction of the resistance heater 30a. In the process of inserting it into the aerosol generating product D, the first end B of the conductive ceramic body 31b is inserted into the aerosol generating product D first. Specifically, the material of the conductive ceramic body 31b may be a conductive ceramic, which is a ceramic that can generate high temperatures when heated by applying an electric current, or does not melt or oxidize even when conductive at high temperatures. Examples include tin oxide, zinc oxide, barium titanate, zirconia, and β-alumina. In specific embodiments, the material composition can be adjusted and an appropriate molding process can be selected according to the design specifications, shape, and heat generation performance needs of the conductive ceramic body 31b to obtain a conductive ceramic material with a desired resistance value.

[0046] Specifically, in this embodiment, as shown in Figure 3, the conductive ceramic body 31b is tubular. Through holes 310 are formed inside the conductive ceramic body 31b, and the diameter of these through holes 310 is less than 0.5 mm. Compared to a U-shaped conductive ceramic body 31b, the strength of the conductive ceramic body 31b is significantly improved, facilitating insertion into the aerosol generating product D and extending the service life of the conductive ceramic body 31b. At the same time, given the small diameter of the holes in the conductive ceramic body 31b, there is no need to fill the through holes 310, effectively reducing the complexity of the process. Specifically, the radial size of the conductive ceramic body 31b is the same in the longitudinal direction.

[0047] Here, the tubular structure of the conductive ceramic body 31b may be manufactured by mold molding and sintering, or by machining, pore discharge, or other methods after ceramic sintering. For example, Figure 3 shows a tubular structure manufactured by pore discharge.

[0048] As shown in Figures 4a and 4b, the substrate 34a extends along the length of the resistive heater 30a, the conductive ceramic body 31b specifically surrounds at least a portion of the substrate 34a, and at least a portion of the conductive ceramic body 31b is supported by the substrate 34a. In a specific embodiment, as shown in Figures 4a and 4b, the substrate 34a is a conductor, and the first lead wire 32b forms conductivity with the first end B of the conductive ceramic body 31b by connecting to the substrate 34a. Here, referring to Figure 4a or Figure 4b, B3 is the connection point between the first lead wire 32b and the substrate 34a, or the connection point between the second lead wire 33b and the conductive ceramic body 31b.

[0049] Specifically, as shown in Figure 3, the base body 34a is a self-supporting columnar body and has a pin-like or needle-like shape. Specifically, the base body 34a includes an extended portion 341a and a tapered portion 342a that are connected in the axial direction. Here, as shown in Figure 4a, the extended portion 341a penetrates the through hole 310 of the conductive ceramic body 31b and is fitted into the conductive ceramic body 31b, and the conductive ceramic body 31b is provided surrounding the extended portion 342a and is provided insulated from the extended portion 341a. Naturally, the extended portion 341a and the conductive ceramic body 31b can also be integrally molded using methods such as hydrostatic press molding and die casting. In specific embodiments, an appropriate insulation method can be selected according to technical requirements such as temperature resistance, pressure resistance, and insulation time, as well as the material of the extended portion 341a. In one embodiment, a first insulating medium layer is provided on the outer wall of the extended portion 341a so as to insulate the extended portion 341a from the conductive ceramic body 31b. In another embodiment, a second insulating medium layer is provided on the inner surface of the hollow structure of the conductive ceramic body 31b so as to insulate the extended portion 341a from the conductive ceramic body 31b. Naturally, the extended portion 341a and the inner surface of the hollow of the conductive ceramic body 31b may be spaced apart so as to insulate them from the conductive ceramic body 31b. Here, the first insulating medium layer and / or the second insulating medium layer may be a glass glaze, inorganic adhesive insulation, chromium-containing tungsten carbide, alumina, magnesium silicate, magnesia coating / film, etc. The length of the extended portion 341a may be the same as the length of the conductive ceramic body 31b, or it may be shorter than the length of the conductive ceramic body 31b. Specifically, the height can be adjusted according to the energy needs of the aerosol generating product D.

[0050] The tapered portion 342a has a radial size at one end facing the extended portion 341a that is larger than the radial size of the extended portion 341a and also larger than the inner diameter of the conductive ceramic body 31b. Specifically, the tapered portion 342a is exposed to the outside of the conductive ceramic body 31b, defines the free front end of the resistance heater 30a, and contacts the end of the conductive ceramic body 3lb near the free front end. In one specific embodiment, as shown in Figure 4a or Figure 4b, a first conductive medium 43 is further provided between the tapered portion 342a and the end face of the first end B of the conductive ceramic body 31b. Specifically, the tapered portion 342a is electrically connected to the first end B of the conductive ceramic body 31b via the first conductive medium 43. In this way, not only is effective contact between the tapered portion 342a and the conductive ceramic body 31b ensured, but the two can also be tightly fixed together. Here, the first conductive medium 43 may be a conductive adhesive, conductive silver paste, tin solder, or solder, and specifically, the first conductive medium 43 may be applied to the surface of the tapered portion 342a facing the conductive ceramic body 31b, or it may be applied to the end face of one end of the conductive ceramic body 31b facing the tapered portion 342a.

[0051] Naturally, the tapered portion 342a can also be provided outside the conductive ceramic body 31b and electrically connected to the side wall surface of the first end B of the conductive ceramic body 31b. In a specific embodiment, in order to facilitate the insertion of the resistance heater 30a into the aerosol generating product D, to ensure smooth and safe insertion, and to prevent the adhesion of product residue, the radial size of the tapered portion 342a can be gradually reduced along the direction away from the extended portion 341a. Specifically, the tapered portion 342a can have a conical shape or a smoothly transitioning shape.

[0052] Specifically, the material of the extended portion 341a and / or the tapered portion 342a may be a metallic material such as stainless steel, iron-aluminum alloy, iron-nickel alloy, copper, or aluminum. The extended portion 341a and the tapered portion 342a can be molded integrally.

[0053] Referring to Figure 3, the first lead wire 32b is electrically connected to one end of the extended portion 341a of the base body 34a, away from the tapered portion 342a, and is connected to the first end B of the conductive ceramic body 31b via the base body 34a. Specifically, the first lead wire 32b can be connected to the central or edge position of the extended portion 341a, so as to avoid contact with the conductive ceramic body 31b and thus avoid interference.

[0054] The second lead wire 33b is electrically connected to the second end C of the conductive ceramic body 31b. In a specific embodiment, a second conductive medium is formed on the surface of the second end C of the conductive ceramic body 31b, and the second lead wire 33b is specifically electrically connected to the second conductive medium and electrically connected to the second end C of the conductive ceramic body 31b via the second conductive medium. In this way, not only can the occurrence of the problem of the second lead wire 33b falling off be effectively reduced, but the contact resistance between the second lead wire 33b and the conductive ceramic body 31b can be made much smaller than the resistance of the conductive ceramic body 31b, and the heating point of the conductive ceramic body 31b can be concentrated at the connection point between the second lead wire 33b and the conductive ceramic body 31b, thus avoiding the inability to heat the entire conductive ceramic body 31b. Here, the first conductive medium 43 and / or the second conductive medium may be a highly conductive conductive adhesive or paste, and both may be electrode coatings formed by sintering silver.

[0055] Here, the first lead wire 32b is designated as the negative lead wire and the second lead wire 33b as the positive lead wire, and they are connected to the positive and negative terminals of the power supply assembly 10, respectively, to introduce current and perform the heating operation. Of course, the first lead wire 32b may be designated as the positive lead wire and the second lead wire 33b as the negative lead wire. Generally, materials with high conductivity such as nickel and silver are selected for the first lead wire 32b and / or the second lead wire 33b, but other materials may be selected or surface treatments may be applied depending on the actual design plan. Specifically, the first lead wire 32b and / or the second lead wire 33b can be connected to the corresponding components by welding.

[0056] Here, by electrically connecting the first lead wire 32b to the first end B of the conductive ceramic body 31b and the second lead wire 33b to the second end C of the conductive ceramic body 31b, current can be passed from one end of the conductive ceramic body 31b to the other, for example, from the first end B to the second end C. Those skilled in the art will understand that U-shaped conductive ceramic bodies have a problem in that the slot position in the middle of the conductive ceramic body is unreasonable, resulting in different width sizes on the left and right sides of the conductive ceramic body. This significantly affects the distribution of current on the conductive ceramic body, leading to an uneven distribution of current in the conductive ceramic body, and furthermore, poor consistency of the aerosols released from the aerosol generator, affecting the mouthfeel. In contrast, the width size or radial size of the conductive ceramic body 31b in this application is kept constant in the longitudinal direction, that is, the width size or radial size of the conductive ceramic body 31b is kept constant along the current direction, effectively ensuring uniformity of heat generation of the conductive ceramic body 31b and further effectively improving the mouthfeel of inhaling the aerosol formed by atomization.

[0057] Furthermore, as shown in Figures 2, 3, and 4b, the resistance heater 30a further includes an electrode cap 35. The electrode cap 35 has a grooved structure, with holes in its bottom wall, and the first lead wire 32b, connected to the base 34a, extends outward from the conductive ceramic body 31b through the holes in the electrode cap 35. As shown in Figure 7, the electrode cap 35 covers the second end C of the conductive ceramic body 31b, and the electrode cap 35 is in contact with the end face and side wall surface of the second end C of the conductive ceramic body 31b, respectively, and is electrically connected to the second end C. In this embodiment, the second lead wire 33b is specifically electrically connected to the electrode cap 35 to further reduce contact resistance and improve the connection stability between the second lead wire 33b and the electrode cap 35. Furthermore, to reduce contact resistance, a highly conductive silver paste or silver paint can be applied to the inner surface of the electrode cap 35. Here, the material of the electrode cap 35 is a metal or alloy such as copper or silver.

[0058] Furthermore, in one embodiment, the resistance heater 30a further includes a temperature sensor, which is fixed to the conductive ceramic body 31b and used to detect the temperature of the conductive ceramic body 31b.

[0059] In another embodiment, referring to Figure 2 and Figure 5, a schematic structural diagram of location A of the resistance heater 30a used in the aerosol generator shown in Figure 2, the first lead wire 32b includes a first thermocouple wire 37a and a second thermocouple wire 37b, the first thermocouple wire 37a and the second thermocouple wire 37b being made of different materials, for example, the materials of the first thermocouple wire 37a and the second thermocouple wire 37b being nickel-chromium and nickel-silicon, respectively, thereby forming a thermocouple for temperature detection between the first thermocouple wire 37a and the second thermocouple wire 37b. Specifically, the first thermocouple wire 37a and the second thermocouple wire 37b are electrically connected to an electrode cap 35, and the temperature of the conductive ceramic body 31b is measured by the thermoelectric effect, facilitating temperature control of the conductive ceramic body 31b. Naturally, since heat conduction exists between the substrate 34a and the conductive ceramic body 31b, the first thermocouple wire 37a and the second thermocouple wire 37b may be electrically connected to the substrate 34a, and this application does not limit this.

[0060] The resistance heater 30a provided in this embodiment has an axial through-hole 310 in the conductive ceramic body 31b that does not penetrate the side wall, and the diameter of the through-hole 310 is less than 0.5 mm. Compared to the conventional U-shaped conductive ceramic body 31b, the diameter of the through-hole 310 is much smaller than the groove width of the U-shaped conductive ceramic body 31b, thereby significantly improving the strength of the conductive ceramic body 31b, enhancing reliability, and reducing process difficulty. Simultaneously, one end of the base 34a is connected to the first end B of the conductive ceramic body 31b, and the base 34a is extended along the length of the conductive ceramic body 31b to the second end C of the conductive ceramic body 31b. The first lead wire 32b is electrically connected to the second end C of the base 34a, and the second lead wire 33b is electrically connected to the second end C of the conductive ceramic body 31b. As a result, the conductive ceramic body 31b forms an electrical circuit along its length, effectively improving the heating uniformity of the conductive ceramic body 31b compared to a conductive ceramic body 31b with a U-shaped structure. Furthermore, the second lead wire 33b is electrically connected to the conductive ceramic body 31b via the second conductive medium layer. This not only effectively reduces the problem of the second lead wire 33b coming loose, but also makes the contact resistance between the second lead wire 33b and the conductive ceramic body 31b much smaller than the resistance of the conductive ceramic body 31b. This prevents the heating point of the conductive ceramic body 31b from concentrating at the connection point between the second lead wire 33b and the conductive ceramic body 31b, thus preventing the conductive ceramic body 31b from heating up completely. At the same time, it prevents the current distribution of the conductive ceramic body 31b from becoming uneven, which would result in poor consistency of the aerosols released from the aerosol generator and affect the mouthfeel. In addition, the resistance heater 30a provided in this embodiment is easy to assemble, contributing to stable mass production of the product and ensuring consistency in product performance.

[0061] The following provides a detailed description of conductive ceramic materials.

[0062] The resistivity of the conductive ceramic provided in this application is 1 × 10⁻⁶ -4 Ω cm or more 1.3×10 -1The conductivity is less than Ω·cm, meeting the requirement for aerosol generating product D to release multiple types of volatile compounds. Furthermore, the conductive ceramic itself has a heating function, avoiding the need to print circuits on the ceramic surface, thus avoiding the problem of circuits coming off due to friction from frequent use, which is advantageous for improving the user experience and the lifespan of the aerosol generating device.

[0063] Selectively, the resistance of the resistive heater 30a made of conductive ceramic provided in this application is between 0.036Ω and 1.5Ω.

[0064] Selectively, the porosity of the conductive ceramics provided in this application is between 0.01% and 10%, and it is understood that the porosity of the conductive ceramics can be designed as needed, that is, a desired porosity can be obtained by appropriately adjusting the ratio of the materials.

[0065] In one embodiment, a resistive heater 30a made of conductive ceramic has a needle-like shape, a diameter of 1.95 mm, a length of 16.31 mm, a tip height of 0.5 mm, a resistance of 0.75 Ω, and the resistivity is calculated to be 2.27 x 10⁻¹⁰. -3 It becomes Ω·cm.

[0066] Here, the method for detecting the resistance of the resistive heater 30a is specifically described in Figure 6, a schematic diagram illustrating the measurement of the resistance of the resistive heater in this application. In this application, the resistance of the conductive ceramic is measured in accordance with "GB / T 5594.5-1985 Performance Test Method for Electronic Component Structure Ceramic Materials Volume Resistivity Test Method". Referring to Figure 6, two lead wires 41 are connected to the LCR tester 40, and the ends of the two lead wires 41 are each connected to a measuring clip 42. The measuring clip 42 includes a clamping portion 421, which is used to clamp the conductive ceramic 50. It is understood that the clamping portion 421 clamps both ends of the conductive ceramic 50. The resistivity of the conductive ceramic is obtained by measurement with the LCR tester 40. The LCR tester 40 can accurately and stably measure the parameters of various elements, and is mainly a tester that measures inductance, capacitance, and resistance, where "L" represents inductance, "C" represents capacitance, and "R" represents resistance.

[0067] In one embodiment, a resistive heater 30a made of conductive ceramic has a needle-like shape, a diameter of 1.95 mm, a length of 18 mm, a tip height of 0.5 mm, and a resistance of 0.75 Ω measured by an LCR tester 40, and the resistivity is calculated to be 2.27 × 10⁻⁶. -3 It becomes Ω·cm.

[0068] In one embodiment, the resistive heater 30a, made of conductive ceramic, is sheet-shaped, has a length of 16 mm, a width of 4.5 mm, and a thickness of 0.45 mm. Its resistance, measured by an LCR tester 40, is 0.7 Ω, and its resistivity is calculated to be 3.9 × 10⁻⁶. -3 It becomes Ω·cm.

[0069] In one embodiment, a resistive heater 30a made of conductive ceramic has a tubular shape, a length of 29 mm, an inner diameter of 7.2 mm, an outer diameter of 8.5 mm, and a resistance of 1.5 Ω measured by an LCR tester 40, and the resistivity is calculated to be 8.98 × 10⁻⁶. -2 It becomes Ω·cm.

[0070] In one embodiment, a resistive heater 30a made of conductive ceramic has a tubular shape, a length of 29 mm, an inner diameter of 7.2 mm, an outer diameter of 9.2 mm, and a resistance of 1.5 Ω measured by an LCR tester 40, and the resistivity is calculated to be 13 × 10⁻¹⁰ -2 It becomes Ω·cm.

[0071] In one embodiment, a resistive heater 30a made of conductive ceramic has a tubular shape, a length of 49 mm, an inner diameter of 5.5 mm, an outer diameter of 6.7 mm, and a resistance of 1.5 Ω measured by an LCR tester 40, and the resistivity is calculated to be 3.52 × 10⁻¹⁰. -2 It becomes Ω·cm.

[0072] The conductive ceramic material provided in this application comprises a main component and a doping component, the main component comprising a first metal oxide, and the doping component comprising a second metal oxide, wherein the valence of the metal in the first metal oxide differs from the valence of the metal in the second metal oxide. Here, the mass percentage of the main component in the conductive ceramic is greater than 80% and less than or equal to 98%. Furthermore, the mass percentage of the doping component in the conductive ceramic is greater than 0.5% and less than or equal to 19%. In this embodiment, the metal in the second metal oxide acquires sufficient energy to enter the lattice of the first metal oxide and performs a donor-doping action, that is, increases the carrier concentration through ion exchange at high temperatures, thereby realizing ceramic conductivity.

[0073] In one embodiment, the valency of the metal in the first metal oxide is less than the valency of the metal in the second metal oxide. Selectively, the valency of the metal in the second metal oxide is 3 or higher.

[0074] When the main component contains zinc oxide and the doping component contains at least one of aluminum oxide, zirconium dioxide, titanium dioxide, or disiniobium pentoxide, the resistivity of the conductive ceramic obtained from the above main component and doping component is 1 × 10⁻¹⁰ -3 Ω·cm~6×10 -2It is located at Ω·cm. Here, zinc oxide accounts for 94% to 98% of the mass of the conductive ceramic, and the doping component includes aluminum oxide, which accounts for 0.5% to 5% of the mass of the conductive ceramic.

[0075] Selectively, the conductive ceramic material contains 94-98% zinc oxide, 0.8-5% aluminum oxide, 0-1% titanium dioxide, and 0-0.5% zirconium dioxide by mass. Specific examples are as follows.

[0076] Example 1 Zinc oxide (ZnO), aluminum oxide (Al2O3), and titanium dioxide (TiO2) powders were weighed in a mass ratio of 97:2:1, added to an aqueous solution, wet-milled for 24 to 48 hours to mix uniformly, dried, and sieved through a 5000 to 8000 mesh sieve to produce a mixed powder. The above mixed powder was added to a polyvinyl alcohol molding agent (PVA) or polyethylene glycol molding agent (PEG), wet-milled and mixed, dried, sieved, and then compression-molded to the design shape at a pressure of 20 MPa to 40 MPa, followed by hydrostatic press molding at a pressure of 100 MPa to 300 MPa to produce a base material. After removing the molding agent, the material was sintered at 1100°C to 1700°C at atmospheric pressure for 5 to 12 hours to produce a conductive ceramic. The conductive ceramic has a resistivity of 2.26 × 10⁻⁶. -3 The density was Ω·cm and the porosity was 5%. Here, under high temperature, Al 3+ Ti 4+ It obtains enough energy to enter the ZnO lattice, Zn 2+ This replaces excess free electrons, provides a donor doping effect, improves the conductivity of the ceramic, and allows the ceramic to self-heat.

[0077] In Example 1, the conductive ceramic was approximately sheet-shaped, with a length of 19.9 mm, a width of 5 mm, and a thickness of 2.5 mm. The resistance of the conductive ceramic, measured by an LCR tester 40, was 36 mΩ.

[0078] Example 2 Zinc oxide (ZnO), aluminum oxide (Al2O3), and titanium dioxide (TiO2) powders were weighed in a mass ratio of 94.5:3:0.5, added to an aqueous solution, wet-milled for 24 to 48 hours to mix uniformly, dried, and sieved through a 5000-8000 mesh sieve to produce a mixed powder. The above mixed powder was added to a polyvinyl alcohol molding agent (PVA) or polyethylene glycol molding agent (PEG), wet-milled and mixed, dried, sieved, and then compression-molded to the design shape at a pressure of 20 MPa to 40 MPa, followed by hydrostatic press molding at a pressure of 100 MPa to 300 MPa to produce a base material. After removing the molding agent, the material was sintered at 1100°C to 1700°C at atmospheric pressure for 5 to 12 hours to produce a conductive ceramic. The conductive ceramic has a resistivity of 9.6 × 10⁻⁶. -3 The density was Ω·cm and the porosity was 3%. Here, under high temperature, Al 3+ Ti 4+ It obtains enough energy to enter the ZnO lattice, Zn 2+ This replaces excess free electrons, provides a donor doping effect, improves the conductivity of the ceramic, and allows the ceramic to self-heat.

[0079] In Example 2, the conductive ceramic was approximately sheet-shaped, with a length of 19 mm, a width of 4 mm, and a thickness of 2 mm. The resistance of the conductive ceramic, measured by an LCR tester 40, was 0.23 Ω.

[0080] Example 3 Zinc oxide (ZnO), aluminum oxide (Al2O3), and titanium dioxide (TiO2) powders were weighed in a mass ratio of 97:2:1, added to an aqueous solution, wet-milled for 24 to 48 hours to mix uniformly, dried, and sieved through a 5000 to 8000 mesh sieve to produce a mixed powder. The above mixed powder was added to a polyvinyl alcohol molding agent (PVA) or polyethylene glycol molding agent (PEG), wet-milled and mixed, dried, sieved, and then compressed-molded to the design shape at a pressure of 20 MPa to 40 MPa, followed by hydrostatic press molding at a pressure of 100 MPa to 300 MPa to produce a base material. After removing the molding agent, the material was sintered at 1100°C to 1700°C at atmospheric pressure for 5 to 12 hours to produce a conductive ceramic. The conductive ceramic has a resistivity of 5.4 × 10⁻⁶. -2 The density was Ω·cm and the porosity was 5%. Here, under high temperature, Al 3+ Ti 4+ It obtains enough energy to enter the ZnO lattice, Zn 2+ This replaces excess free electrons, provides a donor doping effect, improves the conductivity of the ceramic, and allows the ceramic to self-heat.

[0081] In Example 3, the conductive ceramic was in sheet form, with a length of 19 mm, a width of 4 mm, and a thickness of 2 mm. The resistance of the conductive ceramic, as measured by the LCR tester 40, was 1.3 Ω.

[0082] Example 4 Zinc oxide (ZnO), aluminum oxide (Al2O3), and titanium dioxide (TiO2) powders were weighed in a mass ratio of 94:5:0.8:0.2, added to an aqueous solution, wet-milled for 24 to 48 hours to mix uniformly, dried, and sieved through a 5000-8000 mesh sieve to produce a mixed powder. The above mixed powder was added to a polyvinyl alcohol molding agent (PVA) or polyethylene glycol molding agent (PEG), wet-milled and mixed, dried, sieved, and then compression-molded to the design shape at a pressure of 20 MPa to 40 MPa, followed by hydrostatic press molding at a pressure of 100 MPa to 300 MPa to produce a base material. After removing the molding agent, the material was sintered at 1100°C to 1700°C at atmospheric pressure for 5 to 12 hours to produce a conductive ceramic. The conductive ceramic has a resistivity of 2.436 × 10⁻¹⁶. -3 The density was Ω·cm and the porosity was 5%. Here, under high temperature, Al 3+ Ti 4+ , Zr 2+ It obtains enough energy to enter the ZnO lattice, Zn 2+ This replaces excess free electrons, provides a donor doping effect, improves the conductivity of the ceramic, and allows the ceramic to self-heat.

[0083] In Example 4, the conductive ceramic was approximately sheet-shaped, with a length of 19.5 mm, a width of 5 mm, and a thickness of 2.5 mm. The resistance of the conductive ceramic, measured by an LCR tester 40, was 38 mΩ.

[0084] Example 5 Zinc oxide (ZnO), aluminum oxide (Al2O3), and titanium dioxide (TiO2) powders were weighed in a mass ratio of 94.4:5:0.4:0.2, added to an aqueous solution, wet-milled for 24 to 48 hours to mix uniformly, dried, and sieved through a 5000 to 8000 mesh sieve to produce a mixed powder. The above mixed powder was added to a polyvinyl alcohol molding agent (PVA) or polyethylene glycol molding agent (PEG), wet-milled and mixed, dried, sieved, and then compressed-molded to the design shape at a pressure of 20 MPa to 40 MPa, followed by hydrostatic press molding at a pressure of 100 MPa to 300 MPa to produce a base material. After removing the molding agent, the material was sintered at 1100°C to 1700°C at atmospheric pressure for 5 to 12 hours to produce a conductive ceramic. The conductive ceramic has a resistivity of 2.06 × 10⁻⁶. -2 The density was Ω·cm, and the porosity was 0.3%. Here, under high temperature, Al 3+ Ti 4+ , Zr 2+ It obtains enough energy to enter the ZnO lattice, Zn 2+ This replaces excess free electrons, provides a donor doping effect, improves the conductivity of the ceramic, and allows the ceramic to self-heat.

[0085] In Example 5, the conductive ceramic was needle-shaped, with a diameter of 2.5 mm and a length of 19 mm. The resistance of the conductive ceramic, as measured by the LCR tester 40, was 0.8 Ω.

[0086] Example 6 Zinc oxide (ZnO), aluminum oxide (Al2O3), titanium dioxide (TiO2), and zirconium dioxide (ZrO2) powders were weighed in a mass ratio of 96.2:3:0.6:0.2, added to an aqueous solution, wet-milled for 24 to 48 hours to mix uniformly, dried, and sieved through a 5000-8000 mesh sieve to produce a mixed powder. The above mixed powder was added to a polyvinyl alcohol molding agent (PVA) or polyethylene glycol molding agent (PEG), wet-milled and mixed, dried, sieved, and then compression-molded to the design shape at a pressure of 20 MPa to 40 MPa, followed by hydrostatic press molding at a pressure of 100 MPa to 300 MPa to produce a base material. After removing the molding agent, the material was sintered at 1100°C to 1700°C at atmospheric pressure for 5 to 12 hours to produce a conductive ceramic. The conductive ceramic has a resistivity of 7.3 x 10⁻¹⁶. -3 The density was Ω·cm and the porosity was 1%. Here, under high temperature, Al 3+ Ti 4+ , Zr 2+ It obtains enough energy to enter the ZnO lattice, Zn 2+ This replaces excess free electrons, provides a donor doping effect, improves the conductivity of the ceramic, and allows the ceramic to self-heat.

[0087] In Example 6, the conductive ceramic was approximately sheet-shaped, with a length of 19 mm, a width of 5 mm, and a thickness of 2 mm. The resistance of the conductive ceramic, measured by an LCR tester 40, was 0.14 Ω.

[0088] Example 7 Powders of zinc oxide (ZnO), aluminum oxide (Al2O3), titanium dioxide (TiO2), and zirconium dioxide (ZrO2) were weighed in a mass ratio of 96.7:3:0.2:0.1, added to an aqueous solution, wet-milled for 24 to 48 hours to mix uniformly, dried, and sieved through a 5000-8000 mesh sieve to produce a mixed powder. The above mixed powder was added to a polyvinyl alcohol molding agent (PVA) or polyethylene glycol molding agent (PEG), wet-milled and mixed, dried, sieved, and then compression-molded to the design shape at a pressure of 20 MPa to 40 MPa, followed by hydrostatic press molding at a pressure of 100 MPa to 300 MPa to produce a base material. After removing the molding agent, the material was sintered at 1100°C to 1700°C at atmospheric pressure for 5 to 12 hours to produce a conductive ceramic. The conductive ceramic has a resistivity of 6.3 × 10⁻⁶. -3 The density was Ω·cm and the porosity was 1%. Here, under high temperature, Al 3+ Ti 4+ , Zr 2+ It obtains enough energy to enter the ZnO lattice, Zn 2+ This replaces excess free electrons, provides a donor doping effect, improves the conductivity of the ceramic, and allows the ceramic to self-heat.

[0089] In Example 7, the conductive ceramic was approximately sheet-shaped, with a length of 19 mm, a width of 4 mm, and a thickness of 2 mm. The resistance of the conductive ceramic, measured by an LCR tester 40, was 0.15 Ω.

[0090] Selectively, the main component contains zinc oxide, and the doping component contains disiob pentoxide. Specific examples are as follows.

[0091] Example 8 Powders of zinc oxide (ZnO), aluminum oxide (Al2O3), zirconium dioxide (ZrO2), and disiniobium pentoxide (Nb2O5) were weighed in a mass ratio of (90-99.9):(0.5-10):(0-5):(0-5) and added to an aqueous solution. The mixture was then wet-milled for 24-48 hours to ensure uniform mixing, dried, and sieved through a 5000-8000 mesh sieve to produce a mixed powder. The mixed powder was added to a polyvinyl alcohol molding agent (PVA) or polyethylene glycol molding agent (PEG), wet-milled and mixed, dried, and sieved. The mixture was then compressed and molded to the design shape at a pressure of 20-40 MPa, and hydrostatic press-molded at a pressure of 100-300 MPa to produce a base material. After removing the molding agent, the material was sintered at 1100°C-1700°C at atmospheric pressure for 5-12 hours to produce a conductive ceramic. The conductive ceramic has a porosity of less than 5% and a resistivity of 5 × 10⁻⁶. -2 It was less than Ω·cm. Here, under high temperature, Al 3+ , Zr 2+ Nb 5+ It obtains enough energy to enter the ZnO lattice, Zn 2+ This replaces excess free electrons, provides a donor doping effect, improves the conductivity of the ceramic, and allows the ceramic to self-heat.

[0092] When the main component contains titanium dioxide and the doping component contains at least disiniobium pentoxide, the resistivity of the conductive ceramic obtained from the above main component and doping component is 8 × 10⁻¹⁰. -2 The resistance is less than Ω·cm. Here, titanium dioxide accounts for 85% to 95% of the mass of the conductive ceramic, and disiob pentoxide accounts for 5% to 20% of the mass of the conductive ceramic. Specific examples are as follows.

[0093] Example 9 Titanium dioxide (TiO2) and disiniobium pentoxide (Nb2O5) powders were weighed in a mass ratio of (85-95):(5-20), added to an aqueous solution, wet-milled for 24-48 hours to mix uniformly, dried, and sieved through a 5000-8000 mesh sieve to produce a mixed powder. The above mixed powder was added to a polyvinyl alcohol molding agent (PVA) or polyethylene glycol molding agent (PEG), wet-milled and mixed, dried, sieved, and then compression-molded to the design shape at a pressure of 20-40 MPa, followed by hydrostatic press molding at a pressure of 100-300 MPa to produce a base material. After removing the molding agent, the material was sintered at 1100°C-1600°C at atmospheric pressure for 5-12 hours to produce a conductive ceramic. The conductive ceramic has a porosity of less than 3% and a resistivity of 8 × 10⁻⁶ -2 It was less than Ω·cm. Here, under high temperature, Nb 5+ It obtains enough energy to enter the TiO2 lattice, Ti 4+ By substituting and providing excess free electrons, TiO2 performs a donor-doping effect, improving the conductivity of the ceramic. At the same time, the concentration of oxygen vacancies in intrinsic defects increases at high temperatures, further increasing the support concentration, further improving the conductivity of the ceramic, and allowing the ceramic to self-heat.

[0094] In another embodiment, the valency of the metal in the first metal oxide is greater than the valency of the metal in the second metal oxide.

[0095] When the main component contains tantalum pentoxide and the doping component contains at least one of titanium dioxide or zirconium dioxide, the resistivity of the conductive ceramic obtained from the above main component and doping component is 1 × 10⁻¹⁰ -2 Ω·cm~6×10 -2 It is located at Ω·cm. Here, the mass percentage of tantalum pentoxide in the conductive ceramic is between 80% and 98%. Specific examples are as follows.

[0096] Example 10 Tantalum pentoxide (Ta2O5) and titanium dioxide (TiO2) powders were weighed in a mass ratio of 92:8, added to an aqueous solution, wet-milled for 24 to 48 hours to mix uniformly, dried, and sieved through a 5000 to 8000 mesh sieve to produce a mixed powder. The above mixed powder was added to a polyvinyl alcohol molding agent (PVA) or polyethylene glycol molding agent (PEG), wet-milled and mixed, dried, sieved, and then compression-molded to the design shape at a pressure of 20 MPa to 40 MPa, followed by hydrostatic press molding at a pressure of 100 MPa to 300 MPa to produce a base material. After removing the molding agent, the material was sintered at 1100°C to 1700°C at atmospheric pressure for 5 to 12 hours to produce a conductive ceramic. The conductive ceramic has a porosity of 2% and a resistivity of 3.28 × 10⁻⁶. -2 It was Ω·cm. Here, under high temperature, Ti 4+ It obtains enough energy to enter the lattice of Ta2O5, Ta 5+ This replaces excess free electrons, provides a donor doping effect, improves the conductivity of the ceramic, and allows the ceramic to self-heat.

[0097] Example 11 Tantalum pentoxide (Ta2O5) and zirconium dioxide (ZrO2) powders were weighed in a mass ratio of 82:18, added to an aqueous solution, wet-milled for 24 to 48 hours to mix uniformly, dried, and sieved through a 5000 to 8000 mesh sieve to produce a mixed powder. The above mixed powder was added to a polyvinyl alcohol molding agent (PVA) or polyethylene glycol molding agent (PEG), wet-milled and mixed, dried, sieved, and then compressed-molded to the design shape at a pressure of 20 MPa to 40 MPa, followed by hydrostatic press molding at a pressure of 100 MPa to 300 MPa to produce a base material. After removing the molding agent, the material was sintered at 1100°C to 1700°C at atmospheric pressure for 5 to 12 hours to produce a conductive ceramic. The conductive ceramic has a porosity of 1% and a resistivity of 4.1 × 10⁻⁶. -2 It was Ω·cm. Here, under high temperature, Zr 4+ It obtains enough energy to enter the lattice of Ta2O5, Ta 5+This replaces excess free electrons, provides a donor doping effect, improves the conductivity of the ceramic, and allows the ceramic to self-heat.

[0098] Example 12 Powders of tantalum pentoxide (Ta2O5), titanium dioxide (TiO2), and zirconium dioxide (ZrO2) were weighed in a mass ratio of 97:2:1, added to an aqueous solution, wet-milled for 24 to 48 hours to mix uniformly, dried, and sieved through a 5000-8000 mesh sieve to produce a mixed powder. The above mixed powder was added to a polyvinyl alcohol molding agent (PVA) or polyethylene glycol molding agent (PEG), wet-milled and mixed, dried, sieved, and then compressed-molded to the design shape at a pressure of 20 MPa to 40 MPa, followed by hydrostatic press molding at a pressure of 100 MPa to 300 MPa to produce a base material. After removing the molding agent, the material was sintered at 1100°C to 1700°C at atmospheric pressure for 5 to 12 hours to produce a conductive ceramic. The conductive ceramic has a porosity of 6% and a resistivity of 3.1 × 10⁻⁶. -2 It was Ω·cm. Here, under high temperature, Ti 4+ , Zr 4+ It obtains enough energy to enter the lattice of Ta2O5, Ta 5+ This replaces excess free electrons, provides a donor doping effect, improves the conductivity of the ceramic, and allows the ceramic to self-heat.

[0099] Furthermore, the conductive ceramic further includes a conductive resistivity adjustment component to control the resistivity of the conductive ceramic within a target range. In this embodiment, the resistivity of the conductive ceramic with the conductive resistivity adjustment component added is 2 × 10⁻⁶. -3 Ω·cm~6x10 -2 It is located at Ω·cm. In other words, by adding a resistivity adjustment component, the resistivity of the conductive ceramic can be increased by 2 × 10⁻⁶. -3 Ω·cm~6x10 -2 The resistivity can be controlled between Ω·cm and designed as needed to meet the target range. Here, the mass percentage of the conductive resistivity-adjusting component in the conductive ceramic is between 1% and 19%.

[0100] The conductive resistivity-adjusting component comprises at least one of conductive metal carbides, metal borides, toners, or conductive metal powders. Selectively, the metal carbides include silicon carbide. Selectively, the metal borides include titanium boride. Selectively, the conductive metal powders include at least one of gold powder, silver powder, or copper powder. Specific examples are as follows.

[0101] Example 13 Zinc oxide (ZnO), titanium boride (TiB2), and aluminum oxide (Al2O3) powders were weighed in a mass ratio of (80-90):(4-10):(1-15), added to an aqueous solution, wet-milled for 24-48 hours to mix uniformly, dried, and sieved through a 5000-8000 mesh sieve to produce a mixed powder. The above mixed powder was added to a polyvinyl alcohol molding agent (PVA) or polyethylene glycol molding agent (PEG), wet-milled and mixed, dried, sieved, and then compression-molded to the design shape at a pressure of 20-40 MPa, followed by hydrostatic press molding at a pressure of 100-300 MPa to produce a base material. After removing the molding agent, the material was sintered at 1100°C-1600°C at atmospheric pressure for 5-12 hours to produce a conductive ceramic. The conductive ceramic has a porosity of less than 8% and a resistivity of 2 × 10⁻⁶ -2 It was less than Ω·cm. Here, Al 3+ At high temperatures, it obtains enough energy to enter the ZnO lattice, and Zn 2+ By substituting, providing excess free electrons, it performs a donor doping effect, allowing the ceramic to self-heat, and TiB2 itself has good conductivity, and at the same time, Ti 4+ At high temperatures, TiB2 can acquire sufficient energy to enter the ZnO lattice and perform a donor-doping action; that is, TiB2 acts as a resistivity-adjusting component for conductivity, increasing the resistivity of the conductive ceramic by 2 × 10⁻⁶. -2 Control it to less than Ω·cm.

[0102] This application further details conductive ceramic materials from another perspective. The conductive ceramic material provided in this application comprises a conductive component and a non-conductive component, wherein the conductive component comprises at least one of conductive metal borides, metal nitrides, or metal carbides, and the doping component comprises at least one of non-conductive metal oxides or metal nitrides. In this embodiment, the conductivity of the conductive component provides a self-heating function, avoids printing circuits on the ceramic surface, i.e., avoids the problem of circuits falling off due to friction from frequent use, which is advantageous for improving the user experience and the service life of the aerosol generator.

[0103] In one embodiment, the conductive component comprises at least one of titanium boride, titanium nitride, titanium carbide, or silicon carbide. In another embodiment, the non-conductive component comprises at least one of silicon dioxide or zirconium dioxide. Here, the mass percentage of the conductive component in the conductive ceramic is 20% to 80%, and furthermore, the mass percentage of the non-conductive component in the conductive ceramic is 20% to 80%. Specific examples are as follows.

[0104] Example 14 Zirconium dioxide (ZrO2), titanium boride (TiB2), and glass powder were weighed in a mass ratio of (30-60):(40-70):(0-5), added to an aqueous solution, wet-milled for 24-48 hours to mix uniformly, dried, and sieved through a 5000-8000 mesh sieve to produce a mixed powder. The above mixed powder was added to a polyvinyl alcohol molding agent (PVA) or polyethylene glycol molding agent (PEG), wet-milled and mixed, dried, sieved, and then compression-molded to the design shape at a pressure of 20-40 MPa, followed by hydrostatic press molding at a pressure of 100-300 MPa to produce a base material. After removing the molding agent, the material was sintered at 1500°C-2200°C with a protective gas (e.g., argon, nitrogen) for 5-12 hours to produce a conductive ceramic. The conductive ceramic has a porosity of less than 5% and a resistivity of 6 × 10⁻⁶. -3The conductivity was less than Ω·cm. Here, TiB2 itself has good conductivity, and when mixed with zirconium dioxide, it acts as a conductive network, improving the conductivity of the ceramic and allowing the ceramic to self-heat.

[0105] In Example 14, the conductive ceramic material further contains an additive, the additive containing at least glass powder. It is understandable that the additive is a selective material for facilitating the molding of the conductive ceramic.

[0106] Example 15 Zirconium dioxide (ZrO2), titanium boride (TiB2), and silicon dioxide (SiO2) were weighed in a mass ratio of (30-60):(40-70):(0.1-5), added to an aqueous solution, wet-milled for 24-48 hours to mix uniformly, dried, and sieved through a 5000-8000 mesh sieve to produce a mixed powder. The above mixed powder was added to a polyvinyl alcohol molding agent (PVA) or polyethylene glycol molding agent (PEG), wet-milled and mixed, dried, and sieved. The mixture was then compressed and molded to the design shape at a pressure of 20-40 MPa, and hydrostatic press-molded at a pressure of 100-300 MPa to produce a base material. After removing the molding agent, the material was sintered at 1500°C-2200°C with a protective gas (e.g., argon, nitrogen) for 5-12 hours to produce a conductive ceramic. The conductive ceramic has a porosity of less than 2% and a resistivity of 2.9 × 10⁻⁶ -3 The conductivity was less than Ω·cm. Here, the TiB2 itself has good conductivity, acts as a conductive network, improves the conductivity of the ceramic, and allows the ceramic to self-heat.

[0107] Furthermore, the conductive ceramic further contains a conductive resistivity-adjusting component, and the mass percentage of the conductive resistivity-adjusting component in the conductive ceramic is between 0% and 50%. In this embodiment, the resistivity of the conductive ceramic to which the conductive resistivity-adjusting component has been added is 1 × 10⁻⁶. -4 Ω·cm ~ 1.3 × 10 -1 It is located at Ω·cm. In other words, by adding a resistivity adjustment component, the resistivity of the conductive ceramic can be increased to 1 × 10⁻⁶. -4Ω·cm ~ 1.3 × 10 -1 The resistivity can be controlled within the range of Ω·cm, and the control range of the resistivity can be designed as needed.

[0108] The conductive resistivity-adjusting component comprises at least one of conductive metal carbides, metal borides, toners, or conductive metal powders. Selectively, the metal carbides include silicon carbide. Selectively, the metal borides include titanium boride. Selectively, the conductive metal powders include at least one of gold powder, silver powder, or copper powder. Specific examples are as follows.

[0109] Example 16 Silicon carbide (SiC), titanium boride (TiB2), and glass powder were weighed in a mass ratio of (20-50):(50-80):(0-2), added to an aqueous solution, wet-milled for 24-48 hours to mix uniformly, dried, and sieved through a 5000-8000 mesh sieve to produce a mixed powder. The above mixed powder was added to a polyvinyl alcohol molding agent (PVA) or polyethylene glycol molding agent (PEG), wet-milled and mixed, dried, sieved, and then compression-molded to the design shape at a pressure of 20-40 MPa, followed by hydrostatic press molding at a pressure of 100-300 MPa to produce a base material. After removing the molding agent, the material was sintered at 1500°C-2200°C with a protective gas (e.g., argon, nitrogen) for 5-12 hours to produce a conductive ceramic. The conductive ceramic has a porosity of less than 10% and a resistivity of 1 × 10⁻⁶. -3 The conductivity was less than Ω·cm. Here, TiB2 itself has good conductivity, allowing the ceramic to self-heat, and SiC acts as a resistivity adjusting component for conductivity, so the resistivity of the conductive ceramic is 1 × 10⁻⁶. -3 Control it to less than Ω·cm.

[0110] In Example 16, the conductive ceramic material further contains an additive, the additive containing at least glass powder. It is understandable that the additive is a selective material for facilitating the molding of the conductive ceramic.

[0111] Example 17 Silicon carbide (SiC), titanium boride (TiB₂), and silicon dioxide (SiO₂) are weighed at a mass ratio of (20~50):(50~80):(0.1~2), added to an aqueous solution, wet-ground for 24h~48h to mix uniformly, then dried and sieved with a 5000 mesh~8000 mesh sieve to obtain a mixed powder. The above mixed powder is added to polyvinyl alcohol forming agent (PVA) or polyethylene glycol forming agent (PEG), mixed by wet grinding, dried and sieved, then compression-molded into a designed shape under a pressure of 20MPa~40MPa, and isostatically pressed under a pressure of 100MPa~300MPa to produce a green body. After removing the forming agent, the green body is sintered at 1500°C~2200°C for 5h~12h under a protective gas (e.g., argon, nitrogen) to produce a conductive ceramic. The conductive ceramic has a porosity of less than 1% and a resistivity of 2.98×10 -3 Ω·cm. Here, TiB₂ itself has good electrical conductivity, which enables the ceramic to generate heat by itself. SiC, as a conductive resistivity adjusting component, controls the resistivity of the conductive ceramic to be less than 2.98×10 -3 Ω·cm.

[0112] Example 18 Zirconium dioxide (ZrO₂), titanium boride (TiB₂), and copper powder, silver powder or gold powder are weighed at a mass ratio of (30~50):(20~50):(10~30), added to an aqueous solution, wet-ground for 24h~48h to mix uniformly, then dried and sieved with a 5000 mesh~8000 mesh sieve to obtain a mixed powder. The above mixed powder is added to polyvinyl alcohol forming agent (PVA) or polyethylene glycol forming agent (PEG), mixed by wet grinding, dried and sieved, then compression-molded into a designed shape under a pressure of 20MPa~40MPa, and isostatically pressed under a pressure of 100MPa~300MPa to produce a green body. After removing the forming agent, the green body is sintered at 1100°C~2200°C for 5h~12h under a protective gas (e.g., argon, nitrogen) to produce a conductive ceramic. The conductive ceramic has a porosity of less than 3% and a resistivity of 5×10 -3The conductivity was less than Ω·cm. Here, TiB2 and copper powder (or silver powder or gold powder) themselves have good conductivity, and by doping them into the ceramic phase, they act as a conductive network, improving the conductivity of the ceramic and allowing the ceramic to self-heat. Cu powder (or silver powder or gold powder) is used as a resistivity adjustment component, and the resistivity of the conductive ceramic is increased by 5 × 10⁻⁶. -3 Control it to less than Ω·cm.

[0113] Refer to Figure 7, a schematic diagram of the structure of an aerosol generator provided in another embodiment of this application.

[0114] Another embodiment of this application further provides an aerosol generator, the structure of which is shown in Figure 7, A cavity for receiving solid aerosol generating product A, A resistance heater 30b extends at least partially within the cavity and heats the aerosol generating product A to generate aerosol for smoking, A 10A battery cell for power supply, The system includes a controller 20a that conducts current between a battery cell 10a and a resistor heater 30b.

[0115] Refer to Figure 8, which is a schematic diagram of the structure of one embodiment of a resistance heater in the aerosol generator provided in Figure 7.

[0116] As shown in Figure 8, the structure of one embodiment of the resistance heater 30b includes an electrical insulating substrate 31a and a resistance heating track 32a. The material of the electrical insulating substrate 31a may be, for example, ceramic, rigid plastic, surface insulating metal, polyimide, etc., and a rigid pin-shaped or thin blade-shaped form is preferred. During use, it can be inserted into the aerosol generating product A to heat the aerosol generating product A. Alternatively, in other modified embodiments, the electrical insulating substrate 31a may be in a tubular shape surrounding the cavity / aerosol generating product A. The resistive heating track 32a is bonded to the electrically insulating substrate 31a by methods such as printing or deposition, and the resistive heating track 32a may be formed from the conductive ceramic material described above, a detailed explanation of which is omitted here.

[0117] Refer to Figure 9, a schematic diagram of the structure of an aerosol generator provided in another embodiment of this application.

[0118] Another embodiment of this application further provides an aerosol generator whose structure includes an atomizer 100 in which a liquid substrate is stored and vaporized to generate an aerosol, and a power supply assembly 200 that supplies power to the atomizer 100, as shown in Figure 9.

[0119] In one selective embodiment, for example as shown in Figure 9, the power supply assembly 200 includes a receiving cavity 270 at one end in the longitudinal direction for receiving and housing at least a portion of the atomizer 100, and an electrical connection to the atomizer 100 is formed and power is supplied to the atomizer 100 when at least a portion of the atomizer 100 is received and housed within the power supply assembly 200. At the same time, the atomizer 100 is removable from the receiving cavity 270 for replacement and separate storage.

[0120] Refer to Figure 10, which is a schematic diagram of the atomizer structure in the aerosol generator provided in Figure 9.

[0121] Atomizer 100 is, The system includes a liquid storage cavity 12 for storing a liquid substrate and a heating assembly 30 for absorbing the liquid substrate, heating it to vaporize it, and generating an aerosol.

[0122] More specifically, Figure 10 shows a schematic diagram of the structure of one embodiment of the atomizer 100 in Figure 9, the structure of which includes a main housing 10, a suction nozzle A, a smoke discharge pipe 11, a liquid storage cavity 12, a heating assembly 30, an atomizing cavity 22, and electrical contacts 21. The suction nozzle A is formed at the upper end of the main housing 10 and is used by the user to inhale the aerosol. The smoke discharge pipe 11 extends along the longitudinal direction of the main housing 10 and is used to deliver aerosols to the suction nozzle A. The liquid storage cavity 12 is defined by the smoke discharge pipe 11 and the inner wall of the main housing 10, and is used for storing the liquid substrate. The heating assembly 30 is in fluid communication with the liquid storage cavity 12 along the upper longitudinal side of the atomizer 100, and as shown by arrow R1 in Figure 10, the liquid substrate in the liquid storage cavity 12 flows into and is absorbed by the heating assembly 30, which has an atomizing surface 310 opposite to the liquid storage cavity 12, and the atomizing surface 310 is used to heat the liquid substrate and release the aerosol generated. The atomizing cavity 22 is defined by the atomizing surface 310 and is used to contain the released aerosol. The atomizing cavity 22 is in airflow communication with the smoke discharge pipe 11 and delivers the aerosol to the smoke discharge pipe 11. The electrical contact 21 is used to supply power to the heating assembly 30.

[0123] Refer to Figure 11, which is a schematic diagram of the heating assembly in the atomizer provided in Figure 10.

[0124] The specific structure of the heating assembly 30 includes a porous body 31 and a resistance heating track 32. In some embodiments, the porous body 31 may be manufactured from a rigid capillary structure such as porous ceramic, porous glass ceramic, or porous glass, and in the embodiment, the flat surface of the porous body 31 opposite to the liquid storage cavity 12 is configured as an atomizing surface 310. In some embodiments, the resistance heating track 32 is formed on the atomizing surface 310 by mixing conductive raw material powder and printing aids to form a resistance paste, which is then printed and sintered, thereby tightly bonding all or most of its surface to the atomizing surface 320.

[0125] In other modified embodiments, the porous body 31 may be flat, concave with a recess on its upper surface facing the liquid storage cavity 12, or arched with an arch structure on one side of the liquid storage cavity 12.

[0126] In other preferred embodiments, the resistance heating track 32 is a patterned track.

[0127] In other preferred embodiments, the resistance heating track 32 is printed or etched.

[0128] In other preferred embodiments, the resistance heating track 32 has a planar shape.

[0129] In other preferred embodiments, the resistance heating track 32 is a track that extends in a meandering or detour manner.

[0130] In other preferred embodiments, the resistance heating track 32 has a thickness of approximately 60 to 100 μm.

[0131] After assembly, the electrical contacts 21 are brought into contact with both ends of the resistive heating track 32 to form a conductive connection, thereby supplying power to the resistive heating track 32. Here, the resistive heating track 32 may be made of the conductive ceramic material introduced above, and a detailed explanation is omitted here.

[0132] The above are merely embodiments of the present application and do not limit the scope of the patent. Equivalent structures or equivalent flow transformations, or direct or indirect applications to other related technical fields, made using the contents of the specification and drawings of this application shall, for the same reasons, be included within the scope of the patent protection of this application.

Claims

1. Resistivity is 1 × 10⁻⁶ －４ Ω・cm~1.3×10 －１ It contains conductive ceramics in Ω·cm, The conductive ceramic material comprises a main component and a doping component. The mass percentage of the main component in the conductive ceramic is more than 80% and 98% or less. The aforementioned main component contains zinc oxide or tantalum pentoxide. If the main component contains zinc oxide, the doping component contains zirconium dioxide and at least one of aluminum oxide, titanium dioxide, or disiob pentoxide. A resistance heater used in an aerosol generator, wherein the main component contains tantalum pentoxide, and the doping component contains at least one of titanium dioxide or zirconium dioxide.

2. A resistance heater used in an aerosol generator according to claim 1, wherein the mass percentage of the doping component in the conductive ceramic is more than 0.5% and 19% or less.

3. A resistance heater used in an aerosol generator according to claim 1, wherein the main body component comprises zinc oxide, and the doping component comprises zirconium dioxide and at least one of aluminum oxide, titanium dioxide, or disiniobium pentoxide.

4. A resistance heater used in an aerosol generator according to claim 3, wherein the main body component contains zinc oxide, and the doping component contains zirconium dioxide and aluminum oxide.

5. A resistance heater used in an aerosol generator according to claim 3, wherein the mass percentage of zinc oxide in the conductive ceramic is 94% to 98%, the mass percentage of zirconium dioxide in the conductive ceramic is 0% to 0.5%, and the doping component contains aluminum oxide, wherein the mass percentage of aluminum oxide in the conductive ceramic is 0.5% to 5%.

6. The resistivity of the conductive ceramic is 1 × 10 －３ Ω・cm ~ 6 × 10 －２ A resistance heater used in the aerosol generator according to claim 3, having a value of Ω·cm.

7. A resistance heater used in an aerosol generator according to claim 1, wherein the main body component comprises tantalum pentoxide, and the doping component comprises at least one of titanium dioxide or zirconium dioxide.

8. A resistance heater used in an aerosol generator according to claim 7, wherein the mass percentage of tantalum pentoxide in the conductive ceramic is more than 80% and 98% or less.

9. The resistive heater used in an aerosol generator according to claim 1, wherein the conductive ceramic further comprises a conductive resistivity adjusting component for controlling the resistivity of the conductive ceramic to a target range.

10. The resistive heater used in the aerosol generator according to claim 9, wherein the conductive resistivity adjusting component includes at least one of a conductive metal carbide, a metal boride, a toner, or a conductive metal powder.

11. A resistance heater used in an aerosol generator according to claim 9, wherein the mass percentage of the conductive resistivity adjusting component in the conductive ceramic is 1% to 19%.

12. The resistivity of the conductive ceramic is 2 × 10 －３ Ω・cm ~ 6 × 10 －２ A resistance heater used in the aerosol generator according to claim 9, having a value of Ω·cm.

13. A resistance heater used in an aerosol generator according to claim 1, wherein the porosity of the conductive ceramic is 0.01% to 10%.

14. The resistance heater is configured in the shape of an elongated pin, needle, rod, stick, or sheet, or the resistance heater is configured in the shape of a tube, and is used in the aerosol generator according to claim 1.

15. A resistance heater used in the aerosol generator according to claim 1, wherein the resistance of the resistance heater is 0.036 Ω or more and 1.5 Ω or less.

16. An aerosol generating device configured to generate a smoking aerosol by heating an aerosol generating product, A cavity for receiving aerosol-generating products, an aerosol generator comprising: a resistance heater which is a resistance heater used in an aerosol generator according to any one of claims 1 to 15, configured to heat an aerosol generating product received in the cavity.

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