Receptor material and preparation method thereof

Abstract

The invention relates to a receptor material and a preparation method thereof, and belongs to the technical field of receptor materials. The method comprises the following steps: respectively carrying out surface pretreatment on a first susceptor material and a second susceptor material, so that the first susceptor material and the second susceptor material have set surface roughness; performing first annealing on the first susceptor material and the second susceptor material after surface pretreatment at a first set temperature; performing cold rolling compounding on the first susceptor material and the second susceptor material after the first annealing to obtain a susceptor material semi-finished product; carrying out second annealing on the semi-finished susceptor material at a second set temperature so as to form a diffusion layer between the first susceptor material and the second susceptor material; and sequentially carrying out segmented rolling-heat treatment, third annealing and processing on the semi-finished product of the susceptor material after the second annealing to obtain the susceptor material with the target form. According to the embodiment of the invention, the bonding strength of the multilayer receptor material is improved.

Description

Technical Field

[0001] This application relates to the technical field of sensor materials, and particularly to a sensor material and a preparation method thereof. Background Art

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

[0003] In order to control the temperature of the substrate, sensor materials have been proposed. Currently, the mainstream sensor materials are two-layer, three-layer or more sensor materials with a first sensor material and a second sensor material, and this sensor material has two Curie temperature points. Currently, during the heating and use process of this sensor material, problems such as delamination and bending are likely to occur, resulting in uneven aerosol heating, or the second sensor material cannot be temperature-controlled, the system cannot recognize it, and even heating may stop, affecting the suction experience. Summary of the Invention

[0004] This application provides a sensor material and a preparation method thereof to solve the following technical problem: how to improve the bonding strength of multi-layer sensor materials.

[0005] In a first aspect, an embodiment of this application provides a preparation method of a sensor material. The raw materials of the sensor material include at least one piece of a first sensor material and at least one piece of a second sensor material. The number of pieces n1 of the first sensor material and the number of pieces n2 of the second sensor material satisfy the relational expression: |n1 - n2| ≤ 1. The method includes:

[0006] Performing surface pretreatment on the first sensor material and the second sensor material respectively, so that both the first sensor material and the second sensor material have a set surface roughness;

[0007] Performing a first annealing on the surface-pretreated first sensor material and the surface-pretreated second sensor material respectively at a first set temperature;

[0008] Cold rolling and combining the first annealed first sensor material and the first annealed second sensor material to obtain a semi-finished sensor material;

[0009] At a second set temperature, perform a second annealing on the semi-finished receptor material so as to form a diffusion layer between the first receptor material and the second receptor material in the semi-finished receptor material;

[0010] Perform segmented rolling-heat treatment on the semi-finished receptor material after the second annealing to obtain a receptor material.

[0011] Optionally, the set surface roughness is 1.5 μm to 4.0 μm.

[0012] Optionally, the first set temperature is 800 °C to 1080 °C.

[0013] Optionally, the second set temperature is 800 °C to 1080 °C.

[0014] Optionally, the thickness of the diffusion layer is 3 μm to 5 μm.

[0015] Optionally, the process parameters of the cold rolling composite include: the composite deformation amount is ≥70%, the rolling force is 2500 kN to 5000 kN, and the tension is 5 tons to 8 tons.

[0016] Optionally, after performing segmented rolling-heat treatment on the semi-finished receptor material after the second annealing to obtain a receptor material, it further includes:

[0017] Perform a third annealing on the receptor material, and the temperature of the third annealing is 500 °C to 1000 °C.

[0018] Optionally, after performing the third annealing on the receptor material, it further includes:

[0019] Process the receptor material after the third annealing so that the receptor material has a target form; wherein,

[0020] The target form includes at least one of the following: long straight strip shape, cylindrical shape, spherical shape, net shape, B shape, C shape, D shape, E shape, H shape, K shape, U shape, W shape, M shape, V shape, S shape.

[0021] Optionally, the saturation magnetic induction intensity of the first receptor material is ≥1.25 T; and / or,

[0022] The second receptor material satisfies the following properties: the maximum permeability μm is ≥150 mH / m, and the saturation magnetic induction intensity is ≥0.7 T.

[0023] In a second aspect, an embodiment of the present application provides a receptor material, which is prepared by the method according to any one of the embodiments of the first aspect; the receptor material contains multiple receptor material layers, and the multiple receptor material layers include:

[0024] A first receptor material layer containing a first receptor material for generating heat;

[0025] A second receptor material layer containing a second receptor material for regulating temperature and generating heat;

[0026] The first receptor material layer and the second receptor material layer are alternately arranged;

[0027] A diffusion layer is arranged between the first receptor material layer and the second receptor material layer.

[0028] The above technical solution provided by the embodiment of the present application has the following advantages compared with the prior art:

[0029] In the preparation method of the receptor material provided by the embodiment of the present application, the first receptor material and the second receptor material are respectively subjected to surface pretreatment so that the surface-pretreated first receptor material and the surface-pretreated second receptor material both have a set surface roughness, which is conducive to the stress segregation during plastic deformation, is easy to cause lattice distortion on the metal surface, surface micro-hardening, and increases the surface potential; at the same time, due to the existence of energy fluctuations, the energy limit will be broken at high energy to form metal bonds, thereby generating bonding, realizing point bonding, and further improving the bonding strength between the subsequent first receptor material and the second receptor material; at a first set temperature, the surface-pretreated first receptor material and the surface-pretreated second receptor material are respectively subjected to first annealing, which can make the hardness of the first receptor material consistent with the hardness of the second receptor material, thereby reducing the resistance during room-temperature solid-phase compounding, reducing the preparation difficulty, and improving the mechanical bonding strength of the receptor material; the first-annealed first receptor material and the first-annealed second receptor material are subjected to cold rolling compounding, so that the first receptor material and the second receptor material have good mechanical bonding strength; at a second set temperature, the receptor material semi-finished product is subjected to second annealing to form a diffusion layer between the first receptor material and the second receptor material in the receptor material semi-finished product, thereby further improving the bonding strength of the receptor material semi-finished product; the second-annealed receptor material semi-finished product is subjected to segmented rolling-heat treatment to obtain a receptor material with a finished thickness. In summary, the bonding strength of the multi-layer receptor material is improved, so that the receptor material will not have problems such as delamination and deformation during the heating use process, and the heating effect is uniform, stable and consistent, and the suction experience is better. Description of the Drawings

[0030] The drawings here are incorporated into the specification and constitute a part of this specification, showing embodiments consistent with the present application, and are used together with the specification to explain the principles of the present application.

[0031] 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 for 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.

[0032] Figure 1 Schematic flow chart of a preparation method of a receptor material provided by an embodiment of the present application;

[0033] Figure 2 Schematic diagram of a repeated bending test of a receptor material provided by an embodiment of the present application;

[0034] Figure 3 Test chart of the diffusion layer thickness of a receptor material provided by Embodiment 1 of the present application;

[0035] Figure 4 Test chart of the diffusion layer thickness of a receptor material provided by Embodiment 2 of the present application;

[0036] Figure 5 Test chart of the diffusion layer thickness of a receptor material provided by Embodiment 3 of the present application. Detailed implementation manners

[0037] 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 with reference to 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. Based on the embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present application.

[0038] 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 the range. Additionally, whenever a numerical range is indicated herein, it means including any cited number (fraction or integer) within the indicated range.

[0039] In this application, unless otherwise stated, the orientation terms such as "upper" and "lower" specifically refer to the drawing directions in the attached drawings. Additionally, in the description of this application's specification, the terms "include", "comprise", etc. 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 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 of the following items", or similar expressions refer to any combination of these items, including any combination of single items or plural items. For example, "at least one of a, b, or c", or, "at least one of a, b, and c" can both represent: a, b, c, a - b (i.e., a and b), a - c, b - c, or a - b - c, where a, b, and c can be single or multiple respectively.

[0040] Unless otherwise specifically stated, various raw materials, reagents, instruments, and equipment used in this application can be obtained through market purchases or can be prepared by existing methods.

[0041] In a first aspect, an embodiment of this application provides a method for preparing a receptor material. The raw materials of the receptor material include at least one piece of a first receptor material and at least one piece of a second receptor material. The number of pieces n1 of the first receptor material and the number of pieces n2 of the second receptor material satisfy the relationship: |n1 - n2| ≤ 1. Figure 1 is a schematic flow diagram of a method for preparing a receptor material provided by an embodiment of this application; please refer to Figure 1 , and the method includes:

[0042] S1. Respectively perform surface pretreatment on the first receptor material and the second receptor material so that both the first receptor material and the second receptor material have a set surface roughness.

[0043] Respectively performing surface pretreatment on the first receptor material and the second receptor material so that they both have a set surface roughness is conducive to causing stress segregation during plastic deformation, easily causing lattice distortion on the metal surface, surface micro-hardening, and increasing the surface potential; at the same time, due to the existence of energy fluctuations, the energy limit will be broken at high-energy points to form metal bonds, thereby generating adhesion, achieving point bonding, and further improving the bonding strength between the subsequent first receptor material and the second receptor material.

[0044] In some embodiments, the set surface roughness is 1.5 μm to 4.0 μm.

[0045] The set surface roughness can be 1.5 μm to 4.0 μm, which can fully improve the bonding strength between the subsequent first receptor material and the second receptor material. If the set roughness is lower than 1.5 μm, to a certain extent, it will lead to poor bonding force and poor bonding strength between the first receptor material and the second receptor material, and delamination is likely to occur. If the set roughness is higher than 4.0 μm, it may cause the surface of the cold strip blank to be uneven, and the bonding force and bonding strength between the first receptor material and the second receptor material are also very poor, and delamination is likely to occur. Exemplarily, the set surface roughness can be 1.5 μm, 1.7 μm, 1.9 μm, 2.1 μm, 2.3 μm, 2.5 μm, 2.7 μm, 3.0 μm, 3.2 μm, 3.4 μm, 3.6 μm, 3.8 μm, 4.0 μm, etc.

[0046] S2. At a first set temperature, perform first annealing on the surface-pretreated first receptor material and the surface-pretreated second receptor material respectively;

[0047] At a first set temperature, performing first annealing on the surface-pretreated first receptor material and the surface-pretreated second receptor material respectively can make the hardness of the first receptor material consistent with the hardness of the second receptor material, thereby reducing the resistance during room-temperature solid-phase compounding, reducing the preparation difficulty, and improving the mechanical bonding strength of the receptor material.

[0048] In some embodiments, the first set temperature is 800 °C to 1080 °C.

[0049] The first set temperature can be 800 °C to 1080 °C to ensure that the softening degree of the first receptor material and the second receptor material is appropriate. If the first set temperature is higher than 1080 °C, it may cause the two receptor materials to be overly softened, resulting in "slipping" during room-temperature solid-phase compounding and increasing the compounding difficulty. If the first set temperature is lower than 800 °C, it may be difficult to achieve the softening effect, and the resistance of the two materials during room-temperature solid-phase cold rolling compounding is large, the preparation difficulty is high, and the bonding strength becomes poor. Exemplarily, the first set temperature can be 800 °C, 850 °C, 900 °C, 950 °C, 1000 °C, 1050 °C, 1080 °C, etc.

[0050] S3. Cold roll and compound the first annealed first receptor material and the first annealed second receptor material to obtain a semi-finished receptor material;

[0051] Cold roll and compound the first annealed first sensor material and the first annealed second sensor material (room temperature solid-phase compounding) so that the first sensor material and the second sensor material have good mechanical bonding strength.

[0052] In some embodiments, the process parameters of the cold roll compounding include: the compounding deformation amount is ≥70%, the rolling force is 2500 kN to 5000 kN, and the tension is 5 tons to 8 tons.

[0053] The compounding deformation amount can be ≥70% so that the first sensor material and the second sensor material have good mechanical bonding strength. The rolling force can be 2500 kN to 5000 kN, and the tension can be 5 tons to 8 tons to ensure the sheet shape and lateral tolerance of the compounded material and at the same time ensure the compounding effect. Exemplarily, the compounding deformation amount can be 70%, 71%, 72%, 73%, 74%, 75%, etc.; the rolling force can be 2500 kN, 2700 kN, 2900 kN, 3100 kN, 3300 kN, 3500 kN, 3700 kN, 3900 kN, 4100 kN, 4300 kN, 4500 kN, 4700 kN, 5000 kN, etc.; the tension can be 5 tons, 6 tons, 7 tons, 8 tons, etc.

[0054] S4. At the second set temperature, perform a second annealing on the semi-finished sensor material so that a diffusion layer is formed between the first sensor material and the second sensor material in the semi-finished sensor material;

[0055] At the second set temperature, perform a second annealing on the semi-finished sensor material so that a diffusion layer is formed between the first sensor material and the second sensor material in the semi-finished sensor material, thereby further improving the bonding strength of the semi-finished sensor material.

[0056] In some embodiments, the second set temperature is 800 °C to 1080 °C.

[0057] In some embodiments, the thickness of the diffusion layer is 3 μm to 5 μm.

[0058] The second set temperature can be 800°C to 1080°C, so that the atoms of the bonding layer of the two materials are fully diffused to form a diffusion layer of moderate thickness (3μm to 5μm), further improving the bonding strength; if the second set temperature is higher than 1080°C, the diffusion layer may be too thick, causing a significant change in the composition of the first susceptor material and the second susceptor material, which may change the properties of the first susceptor material and the second susceptor material, thereby seriously affecting the heating effect; if the second set temperature is lower than 800°C, the atomic diffusion effect may be deteriorated, the diffusion layer is weak, and the bonding strength is reduced. Exemplarily, the second set temperature can be 800°C, 850°C, 900°C, 950°C, 1000°C, 1050°C, 1080°C, etc. Exemplarily, the thickness of the diffusion layer can be 3μm, 4μm, 5μm, etc. In addition, the holding time of the second annealing can be 2 hours to 6 hours.

[0059] S5, performing segmented rolling and heat treatment on the semi-finished susceptor material after the second annealing to obtain a susceptor material.

[0060] The semi-finished susceptor material after the second annealing is subjected to segmented rolling-heat treatment to obtain a susceptor material with a finished thickness (0.01 mm to 1.0 mm).

[0061] In some embodiments, the step of subjecting the semi-finished susceptor material after the second annealing to segmented rolling-heat treatment to obtain the susceptor material further comprises:

[0062] S6. Performing a third annealing on the susceptor material, wherein the temperature of the third annealing is 500° C. to 1000° C.

[0063] The susceptor material is subjected to a third annealing, and the temperature of the third annealing can be 500°C to 1000°C, which can make the first susceptor material and the second susceptor material recrystallize and maintain a suitable grain size, so that the first susceptor material and the second susceptor material can both exert their own excellent performance, and under the joint action, the heating effect of the susceptor material is uniform, stable and consistent, and the suction experience is better; if the temperature of the third annealing is higher than 1000°C, the grain size of the susceptor material may be too coarse, affecting the magnetic properties of the material, and may cause the brittleness of the material to increase, affecting the use effect; if the temperature of the third annealing is lower than 500°C, it may make it difficult for the first susceptor material and the second susceptor material to recrystallize or maintain a suitable grain size, affecting the performance of the two materials and affecting the heating effect. Exemplarily, the temperature of the third annealing can be 500°C, 600°C, 700°C, 800°C, 900°C, 1000°C, etc. In addition, the speed of the third annealing can be 1m / min to 15m / min.

[0064] In some embodiments, after the third annealing of the receptor material, the following steps are further included:

[0065] S7. Processing the receptor material after the third annealing to make the receptor material have a target morphology;

[0066] Wherein,

[0068] The target morphology includes at least one of the following: long straight bar shape, cylindrical shape, spherical shape, net shape, B shape, C shape, D shape, E shape, H shape, K shape, U shape, W shape, M shape, V shape, S shape.

[0069] According to requirements, the receptor material after the third annealing can be processed to have a target morphology, which can be one or a combination of more than one of long straight bar shape, cylindrical shape, spherical shape, net shape, B shape, C shape, D shape, E shape, H shape, K shape, U shape, W shape, M shape, V shape, S shape.

[0070] In some embodiments, the saturation magnetic induction intensity of the first receptor material is ≥ 1.25T; and / or,

[0071] The second receptor material satisfies the following properties: the maximum magnetic permeability μm is ≥ 150 mH / m, and the saturation magnetic induction intensity is ≥ 0.7T.

[0072] The saturation magnetic induction intensity of the first receptor material can be ≥ 1.25T, and the first receptor material is mainly used for heating. Generally, materials with a higher saturation magnetic induction intensity will generate more significant eddy current losses in an alternating magnetic field, and these losses will be released in the form of heat, thereby realizing the heating function. The saturation magnetic induction intensity of ≥ 1.25T can ensure that the first receptor material has enough energy to be converted into heat energy in an alternating magnetic field environment to meet the heating requirements in different application scenarios. For example, it can quickly increase the temperature to reach the set working temperature range. Exemplarily, the saturation magnetic induction intensity of the first receptor material can be 1.25T, 1.26T, 1.27T, 1.28T, 1.29T, 1.30T, etc.

[0073] The maximum magnetic permeability μm of the second receptor material can be ≥150 mH / m, which means that the second receptor material has a strong response ability to the magnetic field. The second receptor material has a saturation magnetic induction intensity of ≥0.7 T, indicating that the second receptor material can maintain good magnetic stability within a certain high-temperature range. The first receptor material has a relatively high saturation magnetic induction intensity (≥1.25 T), and the saturation magnetic induction intensity of the second receptor material is ≥0.7 T, enabling the two materials to cooperate more coordinately under the action of the magnetic field to jointly complete heating and temperature regulation. Exemplarily, the maximum magnetic permeability μm of the second receptor material can be 150 mH / m, 155 mH / m, 160 mH / m, 170 mH / m, 175 mH / m, etc.; the saturation magnetic induction intensity of the second receptor material can be 0.7 T, 0.75 T, 0.8 T, 0.85 T, 0.9 T, 0.95 T, 1.0 T, etc.

[0074] A receptor material provided by an embodiment of the present application has the following advantages:

[0075] 1. Improvement in bonding strength: Through the above series of preparation steps, the bonding strength of the multi-layer receptor material is gradually increased. From the initial surface pretreatment to form point bonding, to the first annealing to adjust the hardness and cold rolling composite to form mechanical bonding, then to the second annealing to form a diffusion layer to strengthen the bonding, and finally section rolling-heat treatment to further optimize the performance, the bonding between the layers of the material becomes tighter and more firm throughout the process;

[0076] 2. Improvement in service performance: Due to the increase in bonding strength, the receptor material will not have problems such as delamination and deformation during the heating process. This ensures the structural stability of the material, making the heating effect uniform, stable, and consistent. For application scenarios involving the suction experience, a uniform and stable heating effect can provide a better user experience and enhance the suction experience.

[0077] In a second aspect, an embodiment of the present application provides a receptor material, which is prepared by the method described in any one of the embodiments of the first aspect; the receptor material contains multiple receptor material layers, and the multiple receptor material layers include:

[0078] A first receptor material layer containing a first receptor material, for generating heat;

[0079] A second receptor material layer containing a second receptor material, for regulating temperature and generating heat;

[0080] The first receptor material layer and the second receptor material layer are alternately arranged;

[0081] A diffusion layer is provided between the first receptor material layer and the second receptor material layer.

[0082] The sensor material adopts a multilayer structure. The sensor material can be two layers, three layers or even four layers or more. The first sensor material layer containing the first sensor material and the second sensor material layer containing the second sensor material are alternately arranged. The design of this alternating structure has a clear functional division of labor. The first sensor material layer is mainly used for heating, and the second sensor material layer is mainly used for regulating temperature and also taking into account partial heating. Through the combination of different functional layers, effective management of heating and temperature control is achieved, making the functions of the sensor material more diversified and precise. For example, in practical applications, rapid temperature rise may be required in some scenarios. The first sensor material layer can quickly start the heating function; and when the temperature reaches a certain level, the second sensor material layer can regulate the temperature to avoid excessive temperature or excessive fluctuations, thereby ensuring the safety and stability of use. A diffusion layer is arranged between the first sensor material layer and the second sensor material layer. The formation of the diffusion layer is achieved through the second annealing process and other processes during the preparation process. It can enhance the bonding strength between the two layers of materials and make the two materials better integrated. The diffusion layer can also improve the interface performance of the material, reduce stress concentration between layers, and improve the overall stability and durability of the material. In addition, the diffusion layer helps promote electron transport and heat conduction between the two layers of materials, optimizing the electrical and thermal properties of the materials.

[0083] The sensor material is realized based on the preparation method of the above-mentioned sensor material. The specific steps of the preparation method of the sensor material can refer to the above-mentioned embodiment. Since the preparation method of the sensor material adopts part or all of the technical solutions of the above-mentioned embodiment, it at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiment, which will not be described one by one here.

[0084] The present application will be further described below in conjunction with specific embodiments. It should be understood that these embodiments are intended only to illustrate the present application and are not intended to limit the scope of the present application. The experimental methods for the unrecorded specific conditions in the following examples are usually measured according to national standards. If there is no corresponding national standard, then carry out according to general international standards, normal conditions or according to the conditions recommended by the manufacturer.

[0085] Example 1

[0086] A method for preparing a susceptor material, wherein the raw materials of the susceptor material include a first susceptor material and a second susceptor material, wherein the first susceptor material is a 1J117 alloy of a national standard grade, and the second susceptor material is a 1J80 alloy of a national standard grade, comprising:

[0087] The first receptor material and the second receptor material are respectively subjected to surface pretreatment so that both the first receptor material and the second receptor material have a set surface roughness; specifically: Prepare materials. Prepare a 1J117 alloy cold strip blank with a thickness of 3.5 mm and a 1J80 alloy cold strip blank with a thickness of 1.5 mm; Surface pretreatment. Perform surface grinding on the 1J117 alloy cold strip blank with a thickness of 3.5 mm and the 1J80 alloy cold strip blank with a thickness of 1.5 mm. The roughness after treatment is 2.5 μm and 2.7 μm respectively;

[0088] At a first set temperature, the surface-pretreated first receptor material and the surface-pretreated second receptor material are respectively subjected to first annealing; specifically: Anneal the 1J117 alloy cold strip blank at 900 °C and the 1J80 alloy cold strip blank at 1050 °C. After annealing, perform cleaning and drying;

[0089] The first annealed first receptor material and the first annealed second receptor material are subjected to cold rolling and compounding to obtain a semi-finished receptor material; specifically: The process parameters of cold rolling and compounding include: The compounding deformation amount is 75%, the rolling force is 3000 kN, the tension is 6.5 tons, and the layer thickness ratio of the 1J117 alloy to the 1J80 alloy after compounding is 7:3;

[0090] At a second set temperature, the semi-finished receptor material is subjected to second annealing so that a diffusion layer is formed between the first receptor material and the second receptor material in the semi-finished receptor material; The second set temperature is 900 °C and the heat preservation time is 3 hours;

[0091] The semi-finished receptor material after second annealing is subjected to segmented rolling - heat treatment to obtain a receptor material; specifically: The cold strip blank after second annealing is subjected to multi-pass cold rolling and intermediate heat treatment until it is rolled to 0.08 mm;

[0092] The receptor material is successively subjected to third annealing and processing to obtain a receptor material with a target shape; The process parameters of the third annealing include a temperature of 700 °C and a speed of 12 m / min; The target shapes include straight bars of 3×11 mm, 4×10 mm, and 3.5×10.5 mm.

[0093] Example 2

[0094] A method for preparing a receptor material, the raw materials of the receptor material include a first receptor material and a second receptor material, the first receptor material is a 1J111 alloy of national standard grade, and the second receptor material is a 1J77 alloy of national standard grade, including:

[0095] The first receptor material and the second receptor material are respectively subjected to surface pretreatment so that both the first receptor material and the second receptor material have a set surface roughness; specifically: Prepare materials. Prepare a 1J111 alloy cold strip blank with a thickness of 1.5 mm, a 1J77 alloy cold strip blank with a thickness of 2.0 mm, and a 1J111 alloy cold strip blank with a thickness of 1.5 mm. Surface pretreatment. The 1J111 alloy cold strip blank with a thickness of 1.5 mm, the 1J77 alloy cold strip blank with a thickness of 2.0 mm, and the 1J111 alloy cold strip blank with a thickness of 1.5 mm are subjected to surface grinding treatment, and the roughnesses after treatment are 2.6 μm, 2.8 μm, and 2.6 μm respectively;

[0096] At a first set temperature, the surface-pretreated first receptor material and the surface-pretreated second receptor material are respectively subjected to a first annealing; specifically: The 1J111 alloy cold strip blank with a thickness of 1.5 mm is annealed at 875 °C, and the 1J77 alloy cold strip blank is annealed at 1030 °C. After annealing, cleaning and drying are carried out;

[0097] The first receptor material after the first annealing and the second receptor material after the first annealing are subjected to cold rolling and compounding to obtain a semi-finished receptor material; specifically: The process parameters of cold rolling and compounding include: The compound deformation amount is 80%, the rolling force is 3800 kN, the tension is 6.2 tons, and the layer thickness ratio of the 1J111 alloy, 1J77 alloy, and 1J111 alloy after compounding is 3:4:3;

[0098] At a second set temperature, the semi-finished receptor material is subjected to a second annealing to form a diffusion layer between the first receptor material and the second receptor material in the semi-finished receptor material; The second set temperature is 920 °C, and the heat preservation time is 3 hours;

[0099] The semi-finished receptor material after the second annealing is subjected to segmented rolling - heat treatment to obtain a receptor material; specifically: The cold strip blank after the second annealing is subjected to multi-pass cold rolling and intermediate heat treatment until it is rolled to 0.15 mm;

[0100] The receptor material is successively subjected to a third annealing and processing to obtain a receptor material with a target shape; The process parameters of the third annealing include a temperature of 675 °C and a speed of 10.5 m / min; The target shapes include "C" shape, "D" shape, "U" shape, and "W" shape.

[0101] Example 3

[0102] A preparation method of a receptor material, the raw materials of the receptor material include a first receptor material and a second receptor material, the first receptor material is a 1J116 alloy of national standard brand, and the second receptor material is a 1J85 alloy of national standard brand, including:

[0103] The first receptor material and the second receptor material are respectively subjected to surface pretreatment so that both the first receptor material and the second receptor material have a set surface roughness; specifically: Prepare materials. Prepare 0.5-mm-thick cold-rolled blanks of 1J116 alloy, 1.25-mm-thick cold-rolled blanks of 1J85 alloy, 1.0-mm-thick cold-rolled blanks of 1J116 alloy, 1.25-mm-thick cold-rolled blanks of 1J85 alloy, 1.0-mm-thick cold-rolled blanks of 1J116 alloy; Surface pretreatment. The cold-rolled blanks of 1J116 alloy and 1J85 alloy are respectively subjected to surface grinding treatment, and the roughnesses after treatment are 2.4 μm, 2.5 μm, 2.5 μm, 2.6 μm, 2.5 μm respectively;

[0104] At a first set temperature, the surface-pretreated first receptor material and the surface-pretreated second receptor material are respectively subjected to first annealing; specifically: The cold-rolled blanks of 1J117 alloy are annealed at 900 °C, and the cold-rolled blanks of 1J80 alloy are annealed at 1010 °C. After annealing, they are cleaned and dried;

[0105] The first receptor material after the first annealing and the second receptor material after the first annealing are subjected to cold rolling and compounding to obtain a semi-finished receptor material; specifically: The process parameters of cold rolling and compounding include: the compounding deformation amount is 85%, the rolling force is 4500 kN, the tension is 5.8 tons, and the layer thickness ratio of the first receptor material, the second receptor material, the first receptor material, the second receptor material, and the first receptor material after compounding is 1:2.5:2:2.5:2;

[0106] At a second set temperature, the semi-finished receptor material is subjected to second annealing so that a diffusion layer is formed between the first receptor material and the second receptor material in the semi-finished receptor material; the second set temperature is 950 °C, and the heat preservation time is 2.5 hours;

[0107] The semi-finished receptor material after the second annealing is subjected to segmented rolling - heat treatment to obtain a receptor material; specifically: The cold-rolled blank after the second annealing is subjected to multi-pass cold rolling and intermediate heat treatment until it is rolled to 0.35 mm;

[0108] The receptor material is successively subjected to third annealing and processing to obtain a receptor material with a target shape; the process parameters of the third annealing include a temperature of 680 °C and a speed of 12 m / min; the target shapes include "E" shape, "H" shape, "K" shape, "M" shape, "S" shape.

[0109] Comparative Example 1

[0110] Based on the content disclosed in Example 1, the difference between Comparative Example 1 and Example 1 is that: the second set temperature is 700 °C.

[0111] The receptor materials provided in Examples 1 to 3 and Comparative Example 1 were subjected to repeated bending tests. Figure 2 FIG. Figure 2 is a schematic diagram of the repeated bending test of a receptor material provided in an embodiment of the present application; please refer to Figure 2 , where A is the pulling rod; S is the specimen; t is the specimen thickness; h is the distance of the pulling rod; r is the radius of the bending arc. The length of the specimen for the repeated bending test is 150 mm and the width is 5 mm. The specimen is clamped with a circular arc-shaped metal fixture corresponding to the specimen thickness with a radius equal to the bending test parameter (mm) shown in Table 1. The specimen is bent 90° to one side (referred to as the first bending) and then restored (referred to as the second bending). The specimen is bent 90° in the reverse direction in the same manner (referred to as the third bending), and then restored (referred to as the fourth bending), and the state of the joint is visually observed. Please refer to the test results of the bending test of the receptor material shown in Table 2.

[0112] Table 1 Bending test parameters (mm)

[0113] Specimen thickness t Bending arc radius r Lifting rod distance h ≤0.3 1.0±0.1 25 ＞0.3～0.5 2.5±0.1 30 ＞0.5～1.0 5.0±0.1 35 ＞1.0～1.5 7.5±0.2 40 ＞15～3.0 10.0±0.2 50

[0114] Table 2 Test results of the bending test of the receptor material

[0115] Serial number Diffusion layer thickness μm 100 times of repeated bending Example 1 4.4 No delamination occurred, and the bonding was good Example 2 4.4 No delamination occurred, and the bonding was good Example 3 4.5 No delamination occurred, and the bonding was good Comparative example 1 1.7 Delamination occurred

[0116] Figure 3 FIG. Figure 4 is a test chart of the diffusion layer thickness of a receptor material provided in Embodiment 1 of the present application; Figure 4 FIG. Figure 5 is a test chart of the diffusion layer thickness of a receptor material provided in Embodiment 2 of the present application; Figure 5 FIG. Figures 3 - 5 is a test chart of the diffusion layer thickness of a receptor material provided in Embodiment 3 of the present application; please refer to Figures 3 - 5 ; where the abscissa: "Distance in Microns" means "distance (unit: micron)", the ordinate: the characteristic X-ray counting intensity of the element, and the characteristic X-ray can be divided into K-series, L-series, and M-series characteristic X-rays according to the generation situation. Combining with Table 2, it shows that the diffusion layer thickness of the receptor materials obtained in Examples 1 to 3 is appropriate and the bonding strength is relatively high.

[0117] One or more technical solutions in the embodiments of the present application at least further have the following technical effects or advantages:

[0118] (1) In the embodiments of the present application, the prepared receptor materials have rich and diverse morphologies and mature and stable processes, and can meet various aerosol generation systems with a wide variety and diverse changes;

[0119] (2) In the preparation method of the receptor material of the embodiment of the present application, cold rolling composite (room temperature solid-phase composite rolling) is adopted. By controlling the key process parameters, the precision of the composite material is higher, the rolling production efficiency is high, the bonding strength of the rolled composite material is higher, and the performance is more stable;

[0120] (3) Annealing each receptor material before cold strip blank composite and diffusion annealing after composite will cause rapid atomic diffusion, forming a diffusion layer with excellent bonding strength;

[0121] (4) Whether the thermal expansion coefficients of the first receptor material and the second receptor material are consistent or not, the receptor material prepared by room temperature solid-phase composite has an excellent diffusion layer thickness and good bonding strength, and will not appear problems such as delamination and deformation during the heating use process. The heating process is stable, uniform, and the suction experience is better.

[0122] The above are only specific embodiments of the present application, enabling those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be obvious to those skilled in the art. 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 these embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A method for preparing a sensor material, the raw materials of the sensor material including at least one piece of a first sensor material and at least one piece of a second sensor material, the number of pieces n1 of the first sensor material and the number of pieces n2 of the second sensor material satisfying the relationship: |n1 - n2| ≤ 1, the method comprising: Performing surface pretreatment on the first sensor material and the second sensor material respectively to make both the first sensor material and the second sensor material have a set surface roughness; Performing first annealing on the surface-pretreated first sensor material and the surface-pretreated second sensor material respectively at a first set temperature; Cold-rolling and laminating the first-annealed first sensor material and the first-annealed second sensor material to obtain a semi-finished sensor material; Performing second annealing on the semi-finished sensor material at a second set temperature to form a diffusion layer between the first sensor material and the second sensor material in the semi-finished sensor material; Performing segmented rolling-heat treatment on the semi-finished sensor material after the second annealing to obtain a sensor material.

2. The method according to claim 1, characterized in that, The set surface roughness is 1.5 μm to 4.0 μm.

3. The method according to claim 1, wherein The first set temperature is 800 °C to 1080 °C.

4. The method according to claim 1, wherein The second set temperature is 800 °C to 1080 °C.

5. The method according to claim 1 or 4, characterized in that The thickness of the diffusion layer is 3 μm to 5 μm.

6. The method according to claim 1, characterized in that The process parameters of the cold-rolling lamination include: the composite deformation amount is ≥ 70%, the rolling force is 2500 kN to 5000 kN, and the tension is 5 tons to 8 tons.

7. The method according to claim 1, characterized in that, After performing segmented rolling-heat treatment on the semi-finished sensor material after the second annealing to obtain a sensor material, it further includes: Performing third annealing on the sensor material, the temperature of the third annealing being 500 °C to 1000 °C.

8. The method according to claim 7, characterized in that After performing the third annealing on the sensor material, it further includes: Processing the sensor material after the third annealing to make the sensor material have a target form; wherein, The target form includes at least one of the following: long straight strip, cylindrical, spherical, net-shaped, B-shaped, C-shaped, D-shaped, E-shaped, H-shaped, K-shaped, U-shaped, W-shaped, M-shaped, V-shaped, S-shaped.

9. The method according to claim 1, wherein The saturation magnetic induction intensity of the first sensor material is ≥ 1.25 T; and / or, The second sensor material satisfies the following properties: the maximum magnetic permeability μm is ≥ 150 mH / m, and the saturation magnetic induction intensity is ≥ 0.7 T.

10. A receptor material, which is prepared by the method according to any one of claims 1 to 9; The sensor material contains multiple sensor material layers, and the multiple sensor material layers include: A first sensor material layer containing the first sensor material, for heating; A second sensor material layer containing the second sensor material, for temperature regulation and heating; The first sensor material layer and the second sensor material layer are arranged alternately; A diffusion layer is provided between the first sensor material layer and the second sensor material layer.

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