Method for induction heating of aerosol-generating substrate by using receptor material

Abstract

The invention relates to a method for induction heating of an aerosol-generating substrate by using a susceptor material, and belongs to the technical field of susceptor materials. The method comprises the following steps: obtaining a susceptor material with a set average particle size and set chemical components, wherein the set chemical components comprise Ni, Cu and Fe; wherein in percentage by mass, the content of Ni is 40%-55%, and the content of Cu is 0.1%-1.0%; and screening out a plurality of receptor materials with the same average particle size from the receptor materials, mixing the receptor materials with the aerosol generating matrix, and controlling the filling coefficient of the mixing, so that the plurality of receptor materials with the same average particle size perform induction heating on the aerosol generating matrix to obtain the aerosol generating product. Through the synergistic effect of the chemical components of the susceptor material and the heating process, the heating efficiency of the susceptor material for induction heating of the aerosol-generating substrate is greatly improved.

Description

Technical Field

[0001] This application relates to the technical field of sensor materials, and in particular to a method for a sensor material to inductively heat an aerosol-forming substrate. Background Art

[0002] An aerosol-generating system that heats an aerosol-forming substrate based on the principle of electromagnetic induction may include a sensor assembly in the system, and the sensor assembly includes an induction source and a sensor. The induction source is configured to generate an alternating electromagnetic field, and the alternating electromagnetic field induces heat in the sensor, thereby generating at least one of eddy current loss and hysteresis loss. The aerosol-forming substrate may be ordered tobacco, disordered tobacco, or may also be tea, herb particles or powder, all of which are expected to be heated to volatilize an aerosol for inhalation.

[0003] In order to control the temperature of the substrate, sensors have been proposed. Currently, there are mainly two types of sensors. The mainstream one is a two-layer, three-layer or more sensor material with a first sensor material and a second sensor material, and the sensor material has two Curie temperature points; the second type is a single-material sensor material, and the sensor material has only one Curie temperature point. Currently, there are problems that the sensor material cannot be in full and sufficient contact with the aerosol-forming substrate, the heating efficiency is low, the induction preheating time is long, and the heating uniformity is poor, which affects the inhalation experience. Moreover, the resistivity of the existing sensor materials is relatively high, and the induction preheating time is relatively long, which affects the inhalation experience. In addition, the preparation cost of the sensor material is high. Summary of the Invention

[0004] This application provides a method for a sensor material to inductively heat an aerosol-forming substrate to solve the following technical problem: how to improve the heating efficiency of the sensor material for inductively heating the aerosol-forming substrate.

[0005] In a first aspect, an embodiment of this application provides a method for a sensor material to inductively heat an aerosol-forming substrate, and the method includes:

[0006] Obtain a sensor material with a set average particle size and a set chemical composition, where the set chemical composition includes: Ni, Cu, and Fe; wherein, by mass fraction, the content of Ni is 40% to 55%, and the content of Cu is 0.1% to 1.0%;

[0007] Screen out a plurality of the sensor materials with the same average particle size from the sensor materials and mix them with the aerosol-forming substrate, and control the filling coefficient of the mixing so that the plurality of the sensor materials with the same average particle size inductively heat the aerosol-forming substrate to obtain an aerosol-generating product.

[0008] Optionally, the content of Cu in the set chemical composition is 0.2% to 0.65%.

[0009] Optionally, the set chemical composition further includes Co.

[0010] Optionally, the content of Co in the set chemical composition is 0 to 15%.

[0011] Optionally, the chemical composition further includes impurity elements, the impurity elements include C, Si, Mn, Cr, Mo, Al, P, and S, and the content of the impurity elements is ≤0.1%.

[0012] Optionally, the set average particle size is 0.1 mm to 3 mm.

[0013] Optionally, the shape of the receptor material is a regular shape and / or an irregular shape; wherein,

[0014] The regular shape includes at least one of the following: sphere, cube, cuboid, cylinder, cylindrical tube, sheet.

[0015] Optionally, the filling coefficient is ≥80%.

[0016] Optionally, the receptor material satisfies at least one of the following properties: the Curie temperature is 400 °C to 550 °C, the resistivity is 0.018×10 -6 Ω·m to 0.25×10 -6 Ω·m, and the saturation magnetic induction intensity is >1.4 T.

[0017] Optionally, obtaining the receptor material with a set average particle size and a set chemical composition includes:

[0018] Successively melting and casting the raw materials to obtain an alloy ingot with a set chemical composition;

[0019] Crushing the alloy ingot to obtain the receptor material with a set average particle size and a set chemical composition.

[0020] The above technical solutions provided by the embodiments of the present application have the following advantages compared with the prior art:

[0021] The sensor material provided in the embodiment of the present application is used for the method of inductively heating the aerosol generating substrate, the method comprising: obtaining a sensor material with a set average particle size and a set chemical composition, the set chemical composition comprising: Ni, Cu, and Fe; wherein, in terms of mass fraction, the content of Ni is 40% to 55%, and the content of Cu is 0.1% to 1.0%; screening out a plurality of the sensor materials with the same average particle size from the sensor material and mixing them with the aerosol generating substrate, and controlling the filling coefficient of the mixture so that the plurality of the sensor materials with the same average particle size perform inductive heating on the aerosol generating substrate to obtain an aerosol generating product. The chemical composition of the sensor material comprises Ni and Cu, and when the content of Ni is 40% to 55%, as the content of Ni increases, the Curie temperature gradually increases, and the saturation magnetic induction intensity first increases and then decreases. With the addition of the Cu element, the effect of reducing the resistivity can be achieved, but at the same time, the saturation magnetic induction intensity will also be reduced, and the two are a contradiction. Therefore, the content of Ni is 40% to 55%, and the content of Cu is 0.1% to 1.0%, so as to achieve precise control of the Curie temperature, resistivity and saturation magnetic induction intensity of the receptor material, thereby improving the electrical properties of the receptor material, and then improving the heating efficiency of the receptor material for induction heating of the aerosol generating matrix; the receptor material with a set average particle size ensures that the receptor material has a certain uniformity in size, improves the uniformity of subsequent mixing and the stability of the heating effect; screens out multiple receptor materials with the same average particle size for mixing with the aerosol generating matrix: screening multiple receptor materials with the same average particle size can further improve the uniformity of the receptor material, and multiple uniformly distributed receptor materials can transfer heat more evenly in the aerosol generating matrix during induction heating; multiple uniformly distributed and closely contacted receptor materials perform induction heating on the aerosol generating matrix, which can achieve a fast, uniform and stable heating effect. This stable heating process enables the aerosol generating matrix to be converted into an aerosol in the expected manner, and finally obtains an aerosol generating product with stable quality and good suction taste, which meets the user's demand for product performance and experience. Therefore, the embodiments of the present application improve the heating efficiency of the susceptor material for inductively heating the aerosol generating substrate through the synergistic effect of the chemical composition of the susceptor material and the susceptor heating process. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0023] To more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the accompanying drawings required in the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0024] Figure 1 It is a schematic flowchart of a method for a sensor material provided by an embodiment of the present application to sense and heat an aerosol generating substrate;

[0025] Figure 2 It is a comparison physical diagram of an aerosol generating substrate before and after suction testing of a sensor material provided by Embodiment 1 of the present application;

[0026] Figure 3 It is a comparison physical diagram of an aerosol generating substrate before and after suction testing of a sensor material provided by Embodiment 2 of the present application;

[0027] Figure 4 It is a comparison physical diagram of an aerosol generating substrate before and after suction testing of a sensor material provided by Embodiment 3 of the present application. Detailed implementation manners

[0028] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present application in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are some, but not all, of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts fall within the scope of protection of the present application.

[0029] The various embodiments of the present application may exist in the form of a range; it should be understood that the description in the form of a range is only for convenience and brevity, and should not be construed as a rigid limitation on the scope of the present application; therefore, it should be considered that the described range description has specifically disclosed all possible sub-ranges and single values within that range. For example, it should be considered that the range description from 1 to 6 has specifically disclosed sub-ranges such as from 1 to 3, from 1 to 4, from 1 to 5, from 2 to 4, from 2 to 6, from 3 to 6, etc., and single numbers within that range, such as 1, 2, 3, 4, 5, and 6, regardless of what the range is. Additionally, whenever a numerical range is indicated herein, it means including any cited number (fraction or integer) within the indicated range.

[0030] In this application, unless otherwise stated, the orientation terms such as "upper" and "lower" specifically refer to the drawing direction in the attached drawings. Additionally, in the description of this application's specification, terms such as "include" and "comprise" mean "include but not limited to". In this text, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. In this text, "and / or" describes the association relationship of associated objects, indicating that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. Where A and B can be singular or plural. In this text, "at least one" means one or more, and "multiple" means two or more. "At least one kind", "at least one item (one) below" or similar expressions refer to any combination of these items, including any combination of single item (one) or plural items (ones). For example, "at least one item (one) among a, b, or c", or, "at least one item (one) among a, b, and c" can both represent: a, b, c, a - b (that is, a and b), a - c, b - c, or a - b - c, where a, b, and c can be single or multiple respectively.

[0031] Unless otherwise specifically stated, various raw materials, reagents, instruments, equipment, etc. used in this application can be obtained through market purchase or can be prepared by existing methods.

[0032] In a first aspect, an embodiment of this application provides a method for a sensor material to inductively heat an aerosol - generating substrate, Figure 1 is a schematic flow diagram of a method for a sensor material to inductively heat an aerosol - generating substrate provided by an embodiment of this application; please refer to Figure 1 , the method includes:

[0033] S1. Obtain a sensor material with a set average particle size and a set chemical composition, where the set chemical composition includes: Ni, Cu, and Fe; wherein, by mass fraction, the content of Ni is 40% to 55%, and the content of Cu is 0.1% to 1.0%;

[0034] In some embodiments, the content of Cu in the set chemical composition is 0.2% to 0.65%.

[0035] When the sensor generates heat, it mainly uses eddy - current loss to generate heat, and the eddy - current loss power P e is related to the shape of the sensor. When the sensor is in the shape of a sheet, the eddy - current loss formula is: where f represents the operating frequency, B mrepresents the saturation magnetic induction intensity, ρ represents the resistivity, and d represents the sheet thickness. When the sensor is in a cylindrical or tubular shape, the eddy current loss formula is: where f represents the operating frequency, B m represents the magnetic induction intensity, ρ represents the resistivity, and r represents the radius. Regardless of the shape of the sensor, the common feature of its eddy current loss power is that it is proportional to the frequency, saturation magnetic induction intensity, and the square of the sensor size, and inversely proportional to the resistivity.

[0036] The chemical composition of the sensor material includes Ni and Cu. When the content of Ni is 40% to 55%, as the content of Ni increases, the Curie temperature gradually increases, and the saturation magnetic induction intensity first increases and then decreases. With the addition of Cu element, the effect of reducing the resistivity can be achieved, but at the same time, the saturation magnetic induction intensity will also be reduced, which is a contradiction point. Therefore, the content of Ni is 40% to 55%, and the content of Cu is 0.1% to 1.0%, achieving precise control of the Curie temperature, resistivity, and saturation magnetic induction intensity of the sensor material, thereby improving the electrical properties of the sensor material.

[0037] The content of Ni can be 40% to 55% to ensure that the sensor material has a Curie temperature of 400 to 550 °C. The content of Cu can be 0.1% to 1.0%. With the addition of Cu element, the effect of reducing the resistivity can be achieved, but at the same time, the saturation magnetic induction intensity will also be reduced, which is a contradiction point. In the embodiments of the present application, to reduce the resistivity and increase the saturation magnetic induction intensity at the same time, precise control of the element content is required to achieve a perfect balance between the resistivity and the saturation magnetic induction intensity. If the content of Cu is higher than 1.0%, the magnetic induction intensity will be significantly reduced, the heating efficiency will be low, the induction preheating time will be long, and the suction experience will be poor; if the content of Cu is lower than 0.1%, it is difficult to play the role of reducing the resistivity. Exemplarily, the content of Ni can be 40%, 41%, 42%, 43%, 44%, 45%, 46%, 47%, 48%, 49%, 50%, 51%, 52%, 53%, 54%, 55%, etc.; the content of Cu can be 0.1%, 0.2%, 0.3%, 0.4%, 0.5%, 0.5%, 0.6%, 0.7%, 0.8%, 0.9%, 1.0%, etc.

[0038] In some embodiments, the set chemical composition further includes Co.

[0039] In some embodiments, the content of Co in the set chemical composition is 0 to 15%.

[0040] The content of Co can be 0 to 15%. As the content of Co increases, the Curie temperature and saturation magnetic induction intensity gradually increase. According to the actual content of the Co element, the Curie temperature and magnetic induction intensity are regulated to maintain the Curie temperature in the range of 400°C to 550°C, which can better adapt to the heating and baking temperature of the mainstream aerosol generation matrix currently on the market, with high heating efficiency, short induction preheating time, and better suction experience. If the content of Co is higher than 15%, the Curie temperature will be higher than 550°C, the aerosol generation matrix will be severely carbonized, and a burnt smell will appear, affecting the suction experience, and even burning and damaging the appliance. Exemplarily, the content of Co can be 0.1%, 0.2%, 0.3%, 0.5%, 1%, 2%, 3%, 4%, 5%, 6%, 7%, 8%, 9%, 10%, 11%, 12%, 13%, 14%, 15%, etc.

[0041] By adjusting and optimizing the content of each element, the Curie temperature, resistivity and saturation magnetic induction intensity can be precisely controlled. When the Ni content is in the range of 40 to 55%, as the Ni content increases, the Curie temperature gradually increases, and the saturation magnetic induction intensity first increases and then decreases; as the Co content increases, the Curie temperature and the saturation magnetic induction intensity gradually increase; with the addition of the Cu element, the resistivity can be reduced, but the saturation magnetic induction intensity will also be reduced at the same time, and the two are a contradiction. In order to reduce the resistivity and increase the saturation magnetic induction intensity, it is necessary to achieve a perfect balance between the resistivity and the saturation magnetic induction intensity through precise control of the element content. Therefore, the embodiment of the present application not only improves the saturation magnetic induction intensity, but also reduces the resistivity, significantly improves the eddy current loss power, shortens the induction preheating time, and increases the heating efficiency.

[0042] In some embodiments, the chemical composition further includes impurity elements, the impurity elements include C, Si, Mn, Cr, Mo, Al, P and S, and the content of the impurity elements is ≤0.1%.

[0043] Impurity elements C, Si, Mn, Cr, Mo, Al, P and S play a negative role in reducing magnetic induction intensity and increasing resistivity, thereby reducing the heating efficiency of the sensor; the content of impurity elements can be ≤0.1% to ensure that the sensor has a higher magnetic induction intensity and a lower resistivity, thereby ensuring that the sensor has a higher heating efficiency. If the content of the impurity element is higher than 0.1%, it may reduce the magnetic induction intensity, increase the resistivity, and significantly reduce the heating efficiency of the sensor. Exemplarily, the content of the impurity element can be 0.1%, 0.09%, 0.08%, 0.085%, 0.075%, 0.07%, etc.

[0044] In some embodiments, obtaining a susceptor material having a set average particle size and a set chemical composition comprises:

[0045] The raw materials are sequentially melted and cast to obtain an alloy ingot with a set chemical composition;

[0046] The alloy ingot is crushed to obtain a sensor material with a set average particle size and a set chemical composition.

[0047] Melting and casting: The raw materials are sequentially subjected to vacuum induction melting and casting to obtain an alloy ingot. Vacuum induction melting can effectively isolate air, reduce the mixing of impurities and gases, ensure the purity of the alloy, and improve the properties such as the electrical conductivity and thermal conductivity of the alloy. Good electrical conductivity helps the sensor material to quickly generate heat when energized and induced, and high thermal conductivity provides a basis for subsequent heat transfer to the aerosol generating matrix. The casting process forms the alloy ingot into a specific shape, facilitating subsequent processing. Among them, the raw materials include Fe, Ni, Co, and Cu.

[0048] Crushing treatment: The alloy ingot is crushed to obtain a sensor material with a set average particle size. The set average particle size can ensure the uniformity of the sensor material in terms of size, which is crucial for the uniformity of subsequent mixing with the aerosol generating matrix. A uniform particle size distribution makes the sensor material more uniformly distributed in the matrix, facilitating uniform heat transfer and physical support, etc.

[0049] In some embodiments, the set average particle size is from 0.1 mm to 3 mm.

[0050] The alloy ingot is crushed to obtain a sensor material with a set average particle size from 0.1 mm to 3 mm, ensuring the uniformity of the sensor material in terms of size and facilitating the improvement of the uniformity of subsequent mixing with the aerosol generating matrix. A uniform particle size distribution makes the sensor material more uniformly distributed in the matrix, facilitating uniform heat transfer and physical support, etc. Exemplarily, the set average particle size can be 0.1 mm, 0.2 mm, 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1 mm, 1.2 mm, 1.4 mm, 1.5 mm, 1.7 mm, 1.9 mm, 2.1 mm, 2.3 mm, 2.5 mm, 2.7 mm, 2.9 mm, 3 mm, etc.

[0051] In some embodiments, the shape of the sensor material is a regular shape and / or an irregular shape; wherein,

[0052] The regular shape includes at least one of the following: sphere, cube, cuboid, cylinder, cylindrical tube, sheet.

[0053] The shape of the sensor material can be designed according to the requirements, and can be a regular shape and / or an irregular shape. The regular shape can be a combination of one or more of a sphere, a cube, a cuboid, a cylinder, a cylindrical shape, and a sheet.

[0054] In some embodiments, the susceptor material satisfies at least one of the following properties: Curie temperature is 400°C to 550°C, resistivity is 0.018×10 -6 Ω·m to 0.25×10 -6 Ω·m, and the saturation magnetic induction intensity is>1.4T.

[0055] The susceptor provided in the embodiment of the present application is made of a single material, with simple composition and structure, and can realize heating and temperature control functions at the same time, and can replace multi-layer susceptor materials; the Curie temperature of the susceptor is 400°C to 550°C, which can better adapt to the heating and baking temperature of the mainstream aerosol generation matrix on the market, and the heating is faster and more stable, and the heating effect is better; the susceptor has a low resistivity of 0.018×10 -6 Ω·m to 0.25×10 -6 Ω·m, the saturation magnetic induction intensity is higher than 1.4T, the induction preheating time is shorter and the heating efficiency is higher.

[0056] S2. Selecting a plurality of the receptor materials with the same average particle size from the receptor materials and mixing them with an aerosol generating matrix, and controlling the filling factor of the mixture so that the plurality of the receptor materials with the same average particle size can induction heat the aerosol generating matrix to obtain an aerosol generating product.

[0057] As a heating element, the receptor material generates heat quickly after being energized. Since it is in full and close contact with the aerosol-generating matrix, the heat can be efficiently and evenly transferred to the matrix. When the receptor material is evenly distributed around the matrix, the dead corners of heat transfer are avoided, ensuring the consistency of heating of the matrix. This efficient heat transfer allows the aerosol-generating matrix to heat up quickly and then quickly convert into aerosol, meeting the user's inhalation needs.

[0058] Screening out multiple receptor materials with the same average particle size and mixing them with the aerosol generating matrix: Screening out receptor materials with the same average particle size can further improve the uniformity of the material. When these receptor materials with consistent particle sizes are mixed with the aerosol generating matrix, it can ensure that the distribution state of each receptor material in the matrix is ​​more uniform. When the uniformly distributed receptor materials are inductively heated, the heat can be transferred more evenly in the aerosol generating matrix, avoiding the problem of local heat concentration or insufficient heat.

[0059] Control the filling coefficient of the mixture: Ensure that the receptor material is tightly packed around the aerosol - generating substrate, providing guarantee for sufficient close contact. Close contact can accelerate the heat transfer from the receptor material to the aerosol - generating substrate, improving the heating efficiency. At the same time, the tight filling structure also helps to maintain the stability of the heating system. During the inductive heating process, the heat exchange between the receptor material and the substrate can proceed continuously and stably.

[0060] Inductively heat the aerosol - generating substrate to obtain an aerosol - generating article: After the previous steps, multiple receptor materials that are evenly distributed and in close contact inductively heat the aerosol - generating substrate, enabling a fast, uniform, and stable heating effect. This stable heating process allows the aerosol - generating substrate to be transformed into aerosol in the expected manner, ultimately obtaining an aerosol - generating article with stable quality and good puffing taste, meeting the user's requirements for product performance and experience.

[0061] Therefore, the uniform distribution of the receptor material and the close and uniform contact with the aerosol - generating substrate together provide a stable and uniform heating effect, enabling the aerosol - generating substrate to be stably transformed into aerosol. And the uniform substrate distribution ensures that the receptor material will not experience abnormal situations such as dry burning due to local substrate absence during operation, thus realizing a stable cycle of heating and aerosol generation, ultimately enhancing the overall product performance and the user's puffing taste.

[0062] In some embodiments, the filling coefficient is ≥80%.

[0063] The filling coefficient can be ≥80% to ensure that the receptor material is tightly packed around the aerosol - generating substrate. Physically, the receptor material plays a role in supporting and dispersing the aerosol - generating substrate, preventing the substrate from accumulating or being unevenly distributed inside the cartridge. At the same time, this tight filling structure enables the substrate to be stably maintained in its corresponding position during the transportation and use of the cartridge, without easily shifting or leaking. Exemplarily, the filling coefficient can be 80%, 81%, 82%, 83%, 84%, 85%, 86%, 87%, 88%, 89%, 90%, 91%, 92%, 93%, etc.

[0064] In summary, the synergistic effect of the chemical composition of the susceptor material and the heating process has significantly improved the heating efficiency of the susceptor material for inductively heating the aerosol - generating substrate. Composition optimization endows the material with good electromagnetic properties, and the heating process ensures the stable operation of the material during inductive heating and the effective transfer of heat. The two cooperate with each other to achieve rapid, uniform, and stable heating of the aerosol - generating substrate, enabling the aerosol - generating substrate to be converted into aerosol as expected. The stable heating process obtained through the synergistic effect finally produces an aerosol - generating product with stable quality and good puffing taste. This not only meets the product performance requirements but also improves the user experience.

[0065] The method for using a susceptor material for inductively heating an aerosol - generating substrate provided by the embodiments of the present application has the following advantages:

[0066] 1. Preparation and composition of the susceptor material: It is necessary to obtain a susceptor material with a set average particle size and a set chemical composition (Ni, Cu, Fe), where the Ni content is 40% to 55%, and the Cu content is 0.1% to 1.0%;

[0067] 2. Mechanism of action of the material composition: When the Ni content is 40% to 55%, as the Ni content increases, the Curie temperature increases, and the saturation magnetic induction intensity first increases and then decreases; the addition of Cu can reduce the resistivity but will reduce the saturation magnetic induction intensity. Optimizing the contents of Ni and Cu can accurately control the Curie temperature, resistivity, and saturation magnetic induction intensity, improve the electrical properties, and thus enhance the heating efficiency;

[0068] 3. Influence of particle size on heating effect: Setting the average particle size ensures the uniformity of the material size, improves the mixing uniformity and the stability of the heating effect. Screening out susceptor materials with the same average particle size and mixing them with the aerosol - generating substrate further improves the uniformity of the material and makes the heat transfer more balanced;

[0069] 4. Heating effect and product quality: The susceptor materials that are evenly distributed and in close contact can achieve rapid, uniform, and stable heating, enabling the aerosol - generating substrate to be converted into aerosol as expected, thereby obtaining an aerosol - generating product with stable quality and good puffing taste, meeting the user's needs;

[0070] Overall conclusion: Through the synergistic effect of the chemical composition of the susceptor material and the susceptor heating process, the heating efficiency of the susceptor material for inductively heating the aerosol - generating substrate is improved, and the induction pre - heating time is ≤ 3 seconds.

[0071] The present application will be further elaborated below in conjunction with specific embodiments. It should be understood that these embodiments are only used to illustrate the present application and not to limit the scope of the present application. For the experimental methods without specific conditions indicated in the following embodiments, they are generally determined according to national standards. If there is no corresponding national standard, they are carried out according to general international standards, conventional conditions or the conditions recommended by the manufacturer.

[0072] Example 1

[0073] A method for a susceptor material to inductively heat an aerosol - generating substrate, comprising:

[0074] S11. Obtain a susceptor material with a set average particle size and a set chemical composition, including: sequentially melting and casting the raw materials to obtain an alloy ingot with a set chemical composition; crushing the alloy ingot to obtain a susceptor material with a set average particle size and a set chemical composition. By mass fraction, the set chemical composition is Ni: 43.5%, Co: 1.4%, Cu: 0.19%, the total content of impurity elements C, Si, Mn, Cr, Mo, Al, P, and S is 0.07%, and Fe is the balance. The Curie temperature of the susceptor material is 445 °C, the resistivity is 0.021×10 -6 Ω·m, and the saturation magnetic induction intensity is 1.42 T.

[0075] Specifically: Melting. Place the raw materials except Cu in a crucible, then evacuate the vacuum induction melting furnace. When the pressure in the furnace drops to 0.18 Pa, heat the material using an induction coil. After all the material is melted, refine for 20 min and then power off for 5 min. Then add Cu in the hopper to the crucible, fill the vacuum induction furnace with argon until the pressure in the furnace is 0.05 MPa. After that, continue to heat the material using the induction coil for 4.5 min, then adjust the temperature and refine for 1.5 min and then stop heating. Finally, pour the melt in the crucible into a mold, cool and demold to obtain an alloy ingot.

[0076] Crushing: Place the smelted alloy ingot in a crusher to crush out susceptor materials in the form of spheres, cubes, cuboids, cylinders, cylinders, flakes or various irregular shapes with an average particle size of 0.5 - 1.0 mm and a bright surface.

[0077] S21. Screen out multiple susceptor materials with the same average particle size from the susceptor materials and mix them with the aerosol - generating substrate, and control the filling coefficient of the mixing so that the multiple susceptor materials with the same average particle size inductively heat the aerosol - generating substrate to obtain an aerosol - generating product.

[0078] Specifically: screening. Small-sized sensors with an average particle size of 0.8 mm are screened and placed in the mainstream market-dominating vape cartridges launched by Philip Morris International, the world's largest tobacco company in the United States, so that they are in full and uniform contact with the aerosol-forming matrix, and the filling coefficient is 83%.

[0079] In addition, the alloy of the composition of Example 1 is made into sensors of the same size (width: 4 mm, length: 12 mm) as the sensors in the mainstream market-dominating vape cartridges launched by Philip Morris International, and they are placed in the mainstream market-dominating vape cartridges launched by Philip Morris International, which is used as Comparative Example 1. The sensors of Example 1 are placed in the mainstream market-dominating smoking devices and vape cartridges launched by Philip Morris International, the world's largest tobacco company in the United States, for testing. The usage effects of the same model of smoking devices and vape cartridge products of Philip Morris International are used as Comparative Example 2.

[0080] It is found that the sensors made of Example 1 are stable and rapid in the induction preheating stage. The induction preheating time is significantly shorter than that of Comparative Example 1 and Comparative Example 2. The aerosol generation is uniform and the temperature is appropriate. The number of puffs is 14 - 15, and the puffing taste is better, and the experience is better. The specific results are the puffing data results of the sensor material of Example 1 shown in Table 1. Figure 2 This is a comparative physical diagram (left - front, right - back) of a sensor material provided in Example 1 of the present application before and after puffing test; please refer to Figure 2 , and the aerosol-forming matrix is carbonized uniformly and sufficiently.

[0081] Table 1 Puffing data results of the sensor material of Example 1

[0082]

[0083] Example 2

[0084] A method for a sensor material to inductively heat an aerosol-forming matrix, comprising:

[0085] S11. Obtain a sensor material with a set average particle size and a set chemical composition, including: successively melting and casting raw materials to obtain an alloy ingot with a set chemical composition; crushing the alloy ingot to obtain a sensor material with a set average particle size and a set chemical composition. In terms of mass fraction, the set chemical composition is Ni: 50.4%, Cu: 0.42%, and the total content of impurity elements C, Si, Mn, Cr, Mo, Al, P, and S is 0.065%, and the balance is Fe.

[0086] The Curie temperature of the sensor material is 504 °C, the resistivity is 0.023×10 -6 Ω·m, and the saturation magnetic induction intensity is 1.43 T.

[0087] Specifically: smelting. Place the raw materials other than Cu in a crucible, then evacuate the vacuum induction melting furnace. When the pressure in the furnace drops to 0.23 Pa, heat the materials using the induction coil. After all the materials are melted, refine for 20 minutes and then cut off the power for 5 minutes. Then add Cu in the hopper to the crucible, and fill the vacuum induction furnace with argon until the pressure in the furnace reaches 0.06 MPa. After that, continue to heat the materials using the induction coil for 3.5 minutes. Then adjust the temperature and refine for 2 minutes, and finally stop heating. Pour the melt in the crucible into a mold, cool it and then demold it to obtain an alloy ingot. Crushing. Place the smelted alloy ingot in a crusher to crush it into spheres, cubes, cuboids, cylinders, cylindrical tubes, flakes or various irregular shapes with a smooth surface and an average particle size of 1.0 - 1.5 mm.

[0088] S21. Screen out multiple receptor materials with the same average particle size from the receptor materials and mix them with the aerosol - generating substrate, and control the filling coefficient of the mixture so that the multiple receptor materials with the same average particle size can inductively heat the aerosol - generating substrate to obtain an aerosol - generating article.

[0089] Specifically: screening. Screen out small receptors with an average particle size of 1.2 mm and place them in the mainstream market - occupying cartridges launched by Philip Morris International, the world's largest tobacco company in the United States, so that they are in full and uniform contact with the aerosol - generating substrate, and the filling coefficient is 85%.

[0090] In addition, prepare the alloy of the composition of Example 2 into receptors with the same size (width: 4 mm, length: 12 mm) as the receptors in the mainstream market - occupying cartridges launched by Philip Morris International, and place them in the mainstream market - occupying cartridges launched by Philip Morris International as Comparative Example 3. Place the receptors of Example 2 in the mainstream market - occupying smoking devices and cartridges launched by Philip Morris International, the world's largest tobacco company in the United States, for testing. Take the use effect of the same - model smoking devices and cartridge products of Philip Morris International as Comparative Example 4.

[0091] It is found that the receptors made of Example 2 are stable and rapid in the induction pre - heating stage. The induction pre - heating time is significantly shorter than that of Comparative Example 3 and Comparative Example 4. The aerosol generation is uniform and the temperature is appropriate. The number of puffs is 14 - 15, the puffing taste is better, and the experience is better. The specific results are the puffing data results of the receptor materials of Example 2 shown in Table 2. Figure 3 This is a comparison physical diagram (left - before, right - after) of a receptor material before and after the puffing test provided by Example 2 of this application; please refer to Figure 3 , and the carbonization of the aerosol - generating substrate is uniform and sufficient.

[0092] Table 2 Suction data results of the receptor material in Example 2

[0093]

[0094] Example 3

[0095] A method for a receptor material to inductively heat an aerosol - generating substrate, comprising:

[0096] S11. Obtain a receptor material with a set average particle size and a set chemical composition, including: sequentially melting and casting the raw materials to obtain an alloy ingot with a set chemical composition; crushing the alloy ingot to obtain a receptor material with a set average particle size and a set chemical composition. By mass fraction, the set chemical composition is: Ni: 53.6%, Co: 0.25%, Cu: 0.41%, the total content of impurity elements such as C, Si, Mn, Cr, Mo, Al, P, and S is 0.075%, and Fe is the balance.

[0097] The Curie temperature of the receptor is 537 °C, the resistivity is 0.020×10 -6 Ω·m, and the saturation magnetic induction intensity is 1.49 T.

[0098] Specifically: Melting. Place the raw materials except Cu in a crucible, then evacuate the vacuum induction melting furnace. When the pressure in the furnace drops to 0.33 Pa, heat the material using the induction coil. After all the material has melted, refine for 20 min and then cut off the power for 5 min. Then add Cu in the hopper to the crucible, and fill the vacuum induction furnace with argon until the pressure in the furnace is 0.05 MPa. After that, continue to heat the material using the induction coil for 4.5 min, then adjust the temperature and refine for 2.5 min and then stop heating. Finally, pour the melt in the crucible into a mold, cool and demold to obtain an alloy ingot. Crushing. Place the smelted alloy ingot in a crusher to crush out spheres, cubes, cuboids, cylinders, cylindrical tubes, flakes or various irregular shapes with a surface brightness and an average particle size of 0.3 - 0.8 mm.

[0099] S21. Screen out multiple receptor materials with the same average particle size from the receptor materials and mix them with the aerosol - generating substrate, and control the filling coefficient of the mixing so that the multiple receptor materials with the same average particle size inductively heat the aerosol - generating substrate to obtain an aerosol - generating product.

[0100] Specifically: Screening. Screen out small receptors with an average particle size of 0.5 mm and place them in the mainstream market - occupied cartridge launched by Philip Morris International, the world's largest tobacco company in the United States, so that they are in full and uniform contact with the aerosol - generating substrate, and the filling coefficient is 86%.

[0101] In addition, the alloy of the components of Example 3 was prepared into a sensor with the same size (width: 4 mm, length: 12 mm) as the sensor in the mainstream market-dominating cartridge launched by Philip Morris International, and it was placed in the mainstream market-dominating cartridge launched by Philip Morris International as Comparative Example 5. The sensor of Example 3 was placed in the mainstream market-dominating smoking devices and cartridges launched by Philip Morris International, the world's largest tobacco company in the United States, for testing. The usage effect of the same smoking device and cartridge products of Philip Morris International was used as Comparative Example 6.

[0102] It was found that the sensor made of Example 3 was stable and rapid in the induction preheating stage. The induction preheating time was significantly shorter than that of Comparative Example 5 and Comparative Example 6. The aerosol generation was uniform and the temperature was appropriate. The number of puffs was 14 - 15, and the puffing taste was better and the experience was better. The specific results were the puffing data results of the sensor material of Example 3 shown in Table 3. Figure 4 This is a comparison physical diagram (left - front, right - back) of a sensor material before and after the puffing test provided in Example 3 of the present application; please refer to Figure 4 , and the aerosol generation matrix was carbonized uniformly and sufficiently.

[0103] Table 3 Puffing data results of the sensor material of Example 3

[0104]

[0105] One or more technical solutions in the embodiments of the present application at least further have the following technical effects or advantages:

[0106] (1) By adjusting and optimizing the content of each element, precise control of its Curie temperature, resistivity, and saturation magnetic induction intensity was achieved. For example, when the Ni content was in the range of 40 - 55%, as the Ni content increased, the Curie temperature gradually increased, and the saturation magnetic induction intensity first increased and then decreased; as the Co content increased, the Curie temperature and saturation magnetic induction intensity gradually increased; with the addition of the Cu element, the effect of reducing resistivity could be achieved, but at the same time, the saturation magnetic induction intensity would also be reduced, and the two were a contradiction point. In the embodiments of the present application, perfect balance between resistivity and saturation magnetic induction intensity was achieved through precise control of the element content. Both the saturation magnetic induction intensity was enhanced and the resistivity was reduced, significantly enhancing the eddy current loss power, making the induction preheating time shorter and the heating efficiency higher;

[0107] (2) The receptor material provided in the embodiment of the present application is a sphere, cube, cuboid, cylinder, cylindrical, sheet or various irregular shapes with an average particle size of 0.1 to 3 mm, and small receptors with the same average particle size are screened out and evenly mixed with the aerosol generating matrix, with a filling factor of ≥80%. In this way, the aerosol generating matrix in each cigarette cartridge is fully and evenly contacted with the small receptors with the same particle size, and each small receptor acts as an electromagnetic induction heating element. After power is turned on, the aerosol generating matrix at each position of the cigarette cartridge is evenly heated at the same time, and the heating efficiency is higher and more stable, which greatly shortens the induction preheating time, makes the heating faster and more uniform, and provides a better smoking experience.

[0108] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

Claims

1. A method for a susceptor material to inductively heat an aerosol - generating substrate, the method comprising: obtaining a susceptor material having a set average particle size and a set chemical composition, the set chemical composition including: Ni, Cu, and Fe; wherein, by mass fraction, the content of Ni is 40% to 55%, and the content of Cu is 0.1% to 1.0%; screening out a plurality of the susceptor materials with the same average particle size from the susceptor material and mixing them with the aerosol - generating substrate, and controlling the filling coefficient of the mixing so that the plurality of the susceptor materials with the same average particle size inductively heat the aerosol - generating substrate to obtain an aerosol - generating article.

2. The method according to claim 1, characterized in that, The content of Cu in the set chemical composition is 0.2% to 0.65%.

3. The method according to claim 1, wherein The set chemical composition further includes Co.

4. The method according to claim 3, wherein The content of Co in the set chemical composition is 0 to 15%.

5. The method according to claim 1, wherein The chemical composition further includes impurity elements, the impurity elements including C, Si, Mn, Cr, Mo, Al, P, and S, and the content of the impurity elements is ≤0.1%.

6. The method according to claim 1, wherein The set average particle size is 0.1 mm to 3 mm.

7. The method according to claim 1, wherein The shape of the susceptor material is a regular shape and / or an irregular shape; wherein, the regular shape includes at least one of the following: sphere, cube, cuboid, cylinder, cylindrical tube, sheet.

8. The method according to claim 1, characterized in that, The filling coefficient is ≥80%.

9. The method according to any one of claims 1 to 8, characterized in that, The receptor material satisfies at least one of the following properties: the Curie temperature is 400 °C to 550 °C, the resistivity is 0.018×10 -6 Ω·m to 0.25×10 -6 Ω·m, and the saturation magnetic induction intensity is >1.4T.

10. The method according to claim 1, characterized in that, The obtaining of the susceptor material having a set average particle size and a set chemical composition includes: successively melting and casting the raw materials to obtain an alloy ingot having a set chemical composition; crushing the alloy ingot to obtain the susceptor material having a set average particle size and a set chemical composition.

Images