A heating body, an atomizing device and a preparation method of the heating body

Abstract

The application discloses a heating body, an atomizing device and a preparation method of the heating body, wherein the heating body comprises a base electrode, a cover electrode and a two-dimensional material body; the two-dimensional material body is vacuum sealed between the cover electrode and the base electrode and is in electrical contact with both of them. Firstly, the two-dimensional material body has the characteristics of high resistance, small instantaneous impact current and the like, and the electrical contact relationship with the electrode, so that the heat generated by the two-dimensional material body can be directly and quickly transmitted to the base electrode or the cover electrode, the heating body realizes the heating function, and the thermoelectric conversion efficiency of the heating body is effectively improved. Secondly, the two-dimensional material body is arranged in the form of vacuum sealing in the heating body, the two-dimensional material body can be prevented from being oxidized in high-temperature working, and the characteristics of high heat resistance and stability in a vacuum atmosphere are fully utilized, so that the two-dimensional material body or the whole heating body can long-term play its unique electrical and thermal advantages, and the stable, reliable and long-term high-temperature application of the heating body is ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of heat-not-burn, in particular to a heating body, an atomization device and a preparation method of the heating body. BACKGROUND

[0002] Taking a heat-not-burn atomization device as an example, the heating body (also referred to as a heating element) is one of the core components of the atomization device, which serves to heat the aerosol generating substrate to a specific temperature range to generate aerosol for use. Therefore, the performance of the heating body has a crucial influence on the overall performance of the atomization device.

[0003] The existing heating body often adopts a metal thick film heating material or a metal thin layer sheet heating material. The metal thick film heating material usually refers to a heating material body formed by sequentially printing and high-temperature sintering an electrically insulating material layer, a heating resistance material layer, an electrode layer and a surface protection layer on a metal substrate by a screen printing process. The metal thin layer sheet heating material usually refers to a heating material body formed by wrapping a heating film on a metal substrate, and the heating film is usually a planar heating element composed of an electrically insulating material and a heating electronic material arranged therein. In actual application, the existing heating body generally has problems such as low thermoelectric conversion efficiency and poor long-term working reliability at high temperature. SUMMARY

[0004] The present application mainly solves the technical problem of providing a heating body, an atomization device applying the heating body and a method for preparing the heating body, so as to improve the thermal and electrical performance of the heating body.

[0005] According to a first aspect, in one embodiment, a heating body is provided, comprising a base electrode, a cover electrode and a two-dimensional material body; wherein the cover electrode is arranged opposite to the base electrode, the cover electrode and the base electrode each have a first region and a second region on the side facing each other, the first region of the cover electrode and the first region of the base electrode are electrically insulated from each other; the two-dimensional material body is vacuum sealed between the second region of the cover electrode and the base electrode, and the two-dimensional material body has two surfaces opposite in the thickness direction and respectively in electrical contact with the cover electrode and the base electrode.

[0006] In one embodiment, the number of two-dimensional material bodies is set to be multiple, and multiple two-dimensional material bodies are arranged at intervals between the base electrode and the cover electrode.

[0007] In one embodiment, the two-dimensional material body comprises a membrane structure made of at least one material selected from the group consisting of graphite, graphene, molybdenum sulfide, tungsten sulfide, cubic boron arsenide, boron nitride, boron phosphide and tantalum nitride.

[0008] In one embodiment, the two-dimensional material body has an electrical resistance in the thickness direction that is at least 10 times greater than an electrical resistance in the length direction or the width direction.

[0009] In one embodiment, the second region of the base electrode and / or the second region of the cover electrode is provided with a containing chamber for accommodating at least a portion of the two-dimensional material body.

[0010] In one embodiment, the cover electrode and the base electrode are fixedly sealed by vacuum welding at the first region to vacuum-seal the two-dimensional material body between the second regions of the cover electrode and the base electrode.

[0011] In one embodiment, one side of the base electrode facing the cover electrode is provided with a compensation structure at the corresponding first region, the compensation structure being used to compensate for deformation of the cover electrode during vacuum welding.

[0012] In one embodiment, the base electrode is a tubular structure or a columnar structure, and the cover electrode is also a tubular structure; wherein the cover electrode is sleeved on the outer circumferential side of the base electrode, and the axial end of the cover electrode and the axial end of the base electrode are fixedly sealed and electrically insulated from each other.

[0013] In one embodiment, the base electrode is a tubular structure or a columnar structure, and the cover electrode is a sheet structure; wherein the cover electrode is stacked on the outer wall surface of the base electrode and covers the two-dimensional material body in the base electrode; the cover electrode and the outer wall surface of the base electrode at a region outside the geometric contour of the two-dimensional material body are fixedly sealed and electrically insulated from each other.

[0014] In one embodiment, the base electrode and the cover electrode are both sheet structures, and the two-dimensional material body and the cover electrode are stacked in the base electrode in sequence, and the cover electrode and the base electrode at a region outside the geometric contour of the two-dimensional material body are fixedly sealed and electrically insulated from each other.

[0015] In one embodiment, the base electrode and the cover electrode are both sheet structures, and the two-dimensional material body and the cover electrode are stacked in the base electrode in sequence, and the cover electrode and the base electrode at a region outside the geometric contour of the two-dimensional material body are fixedly sealed and electrically insulated from each other.

[0016] In one embodiment, the base electrode and the cover electrode are both made of conductive material, and at least the first region of the base electrode and / or the first region of the cover electrode is provided with an electrically insulating material layer for electrically insulating the base electrode from the cover electrode.

[0017] In one embodiment, the base electrode and the cover electrode are both made of conductive material, and at least the first region of the base electrode and / or the first region of the cover electrode is provided with an electrically insulating material layer for electrically insulating the base electrode from the cover electrode.

[0018] In one embodiment, the base electrode and the cover electrode are both made of conductive material, and at least the first region of the base electrode and / or the first region of the cover electrode is provided with an electrically insulating material layer for electrically insulating the base electrode from the cover electrode.

[0019] The first region of the base electrode and / or the first region of the cover electrode is made of an electrically insulating material, and the second region of the base electrode and / or the second region of the cover electrode is made of an electrically conductive material.

[0020] In one embodiment, a first conductive layer is arranged between the cover electrode and the two-dimensional material body to realize electrical contact between the cover electrode and the two-dimensional material body, and a second conductive layer is arranged between the base electrode and the two-dimensional material body to realize electrical contact between the base electrode and the two-dimensional material body.

[0021] In one embodiment, one of the first conductive layer and the second conductive layer is a low-thermal-conductivity conductive layer, and the other of the first conductive layer and the second conductive layer is a high-thermal-conductivity conductive layer.

[0022] According to a second aspect, in one embodiment, an atomization device is provided, which comprises a power supply module and the heating body of the first aspect, and the base electrode and the cover electrode are respectively arranged in electrical connection with the power supply module.

[0023] According to a third aspect, in one embodiment, a preparation method of the heating body of the first aspect is provided, which comprises:

[0024] The first region of the base electrode and / or the first region of the cover electrode is arranged to be electrically insulated;

[0025] The two-dimensional material body and the cover electrode are sequentially arranged on the base electrode, so that the two-dimensional material body is located between the second regions of the base electrode and the cover electrode;

[0026] In a vacuum environment, the first region of the base electrode and the first region of the cover electrode are fixed and sealed to vacuum-seal the two-dimensional material body between the base electrode and the cover electrode, and to make the two-dimensional material body in electrical contact with the base electrode and the cover electrode, respectively.

[0027] In one embodiment, the arrangement of the first region of the base electrode and / or the first region of the cover electrode to be electrically insulated comprises:

[0028] The electrically insulating material is fixed on the first region of the base electrode and / or the first region of the cover electrode by at least one of sputtering, spraying, printing, nitriding, and oxidation to form an electrically insulating material layer;

[0029] and / or

[0030] Before the first region of the base electrode and / or the cover electrode is electrically insulated, the method further comprises: arranging a containing chamber on the second region of the base electrode to accommodate at least a part of the two-dimensional material body.

[0031] In one embodiment, the arranging the two-dimensional material body and the cover electrode on the base electrode in sequence comprises:

[0032] positioning the two-dimensional material body on the second region of the base electrode;

[0033] arranging the cover electrode on the base electrode in a manner of covering the two-dimensional material body;

[0034] arranging the cover electrode on the base electrode in a manner of covering the two-dimensional material body;

[0035] The fixing and sealing the first region of the base electrode and the first region of the cover electrode in the vacuum environment comprises: placing the combined structure of the base electrode, the two-dimensional material body and the cover electrode in a vacuum environment, and performing brazing sealing treatment on the first regions of the base electrode and the cover electrode.

[0036] In one embodiment, the base electrode and the cover electrode are both tubular structures; the arranging the two-dimensional material body and the cover electrode on the base electrode in sequence comprises:

[0037] positioning the two-dimensional material body on the second region of the base electrode;

[0038] heating the cover electrode to a preset temperature to cause the cover electrode to expand and deform;

[0039] rapidly cooling the cover electrode after the cover electrode is sleeved on the base electrode, or rapidly sleeving the cover electrode on the cold base electrode to cover the two-dimensional material body between the cover electrode and the base electrode.

[0040] The heating body according to the above embodiment comprises a base electrode, a cover electrode and a two-dimensional material body, the base electrode and the cover electrode are arranged in insulation with each other, and the two-dimensional material body is vacuum sealed between the cover electrode and the base electrode and is in electrical contact with the cover electrode and the base electrode respectively. On the one hand, the two-dimensional material body has the electrical characteristics of high resistance in the thickness direction and small impulse current at the start moment, and the electrical contact relationship between the base electrode and the cover electrode, so that the heat generated by the two-dimensional material body can be directly and quickly transmitted to the base electrode or the cover electrode, realizing the heating or heating function of the heating body to the outside, and effectively improving the thermoelectric conversion efficiency of the heating body; on the other hand, the two-dimensional material body is arranged in the form of vacuum sealing in the heating body, which can prevent the two-dimensional material body from being oxidized at high temperature, and can fully utilize the characteristics of strong heat-resistant stability of the two-dimensional material body in vacuum atmosphere, so that the two-dimensional material body or the whole heating body can long-term play its unique electrical and thermal advantages, and provide guarantee for stable and reliable long-term high-temperature application of the heating body. BRIEF DESCRIPTION OF DRAWINGS

[0041] Figure 1 FIG. 1 is a cross-sectional structure schematic diagram of a heating body according to an embodiment.

[0042] Figure 2 FIG. 2 is a cross-sectional structure schematic diagram of a heating body according to an embodiment.

[0043] Figure 3 FIG. 3 is a cross-sectional structure schematic diagram of a heating body according to an embodiment.

[0044] Figure 4 FIG. 4 is a cross-sectional structure schematic diagram of a heating body according to an embodiment.

[0045] Figure 5 FIG. 5 is a cross-sectional structure schematic diagram of a heating body according to an embodiment.

[0046] Figure 6 FIG. 6 is a cross-sectional structure schematic diagram of a heating body according to an embodiment.

[0047] Figure 7 FIG. 7 is an exploded structure schematic diagram of a heating body according to an embodiment.

[0048] Figure 8 FIG. 8 is a structure schematic diagram of a heating body according to an embodiment before forming the compensation structure between the cover electrode.

[0049] Figure 9 FIG. 9 is a structure schematic diagram of a heating body according to an embodiment after forming the compensation structure between the cover electrode.

[0050] Figure 10 FIG. 10 is a cross-sectional structure schematic diagram of a heating body according to an embodiment.

[0051] Figure 11 Cross-sectional structure schematic view of a heating body (eight) for an embodiment.

[0052] Figure 12 Structure exploded schematic view of a heating body for an embodiment.

[0053] Figure 13 Flow chart of a method for preparing a heating body for an embodiment.

[0054] In the drawings:

[0055] 10, base electrode; 10a, accommodation chamber; 10b, compensation structure; 20, cover electrode; 30, two-dimensional material body; 40, layer of electrically insulating material; 50, first electrically conductive layer; 60, second electrically conductive layer; a, extension. DETAILED DESCRIPTION

[0056] The application will be further described below in connection with specific embodiments with reference to the drawings. Like elements in different embodiments are denoted by like reference numerals. In the following embodiments, many details are described in order to provide a better understanding of the application. However, it will be apparent to those skilled in the art that some features in different embodiments can be omitted, or replaced by other elements, materials, methods, etc. In some cases, some operations related to the application are not shown or described in the specification in order to avoid the core of the application being overwhelmed by too much description, and it is not necessary to describe these related operations in detail for those skilled in the art based on the description in the specification and general technical knowledge in the art.

[0057] In addition, the features, operations or characteristics described in the specification can be combined in any appropriate manner to form various embodiments. At the same time, the steps or actions in the method description can also be sequentially adjusted or adjusted in a manner that is obvious to those skilled in the art. Therefore, the various sequences in the specification and drawings are only for the purpose of clearly describing a certain embodiment, and do not mean that the sequence is necessary, unless otherwise stated that a certain sequence must be followed.

[0058] The serial numbers of the components in this paper, such as "first", "second", etc., are only used to distinguish the described objects, and do not have any sequence or technical meaning. Unless otherwise specified, the "connection" and "coupling" in this application include direct and indirect connections (couplings).

[0059] Two-dimensional material generally refers to a kind of material in which electrons can only move freely in two dimensions at nanometer scale (1-100 nm), such as a kind of material represented by graphite or graphene; the two-dimensional material has unique thermal and electrical characteristics such as fast heat transfer and small instantaneous impact current when starting, although the two-dimensional material has been applied in some optoelectronic device fields, but has not been stably and reliably applied in the field of heating non-combustion.

[0060] The heating body provided in the application is characterized in that the two-dimensional material body is packaged in a vacuum-sealed form between the base electrode and the cover electrode; on the one hand, by means of the electrical contact relationship between the two-dimensional material body and the base electrode and the cover electrode, the two-dimensional material body can be quickly heated or heated by applying a potential difference to the base electrode and the cover electrode, so as to directly and quickly transfer heat to the base electrode or the cover electrode, thereby effectively improving the thermoelectric conversion efficiency of the heating body.

[0061] On the other hand, since the two-dimensional material body is packaged in a vacuum-sealed form between the base electrode and the cover electrode, the base electrode and the cover electrode can form effective protection for the two-dimensional material body to prevent the two-dimensional material body from being oxidized by oxidizing gases such as air when working at high temperature, thereby ensuring that the two-dimensional material body can stably exert its unique thermal and electrical advantages for a long time, and further effectively improving the heat resistance, stability and reliability of the heating body during long-term work.

[0062] Please refer to Figures 1 to 12 The embodiment of the application provides a heating body which can be used as an electrothermal device in a heating non-combustion atomization device, a household electric heating device and the like; the heating body comprises a base electrode 10, a cover electrode 20, a two-dimensional material body 30 and other components as needed, which will be described below.

[0063] Please refer to Figures 1 to 12 The base electrode 10 and the cover electrode 20 can adopt different structural forms according to the design of the overall profile of the heating body, the application scene of the heating body and the like; for example, please refer to Figures 2 to 6 The base electrode 10 adopts a tubular structure (i.e. a hollow pipe material), and the cover electrode 20 adopts a tubular structure or a sheet structure, and the cover electrode 20 is arranged on the outer periphery of the base electrode 10 or is stacked on the outer peripheral wall of the base electrode 10, so as to form a tubular heating body; for another example, please refer to Figure 10 The base electrode 10 adopts a columnar structure (or a needle-like structure), and the cover electrode 20 adopts a tubular structure or a sheet structure, and the cover electrode 20 is arranged on the outer periphery of the base electrode 10 or is stacked on the outer peripheral wall of the base electrode, so as to form a needle columnar heating body; for another example, please refer to Figure 1 The base electrode 10 and the cover electrode 20 both adopt a sheet structure, and are arranged in a stacked manner, so as to form a sheet-shaped heating body.

[0064] Please refer to Figures 1 to 12 The two-dimensional material body 30 is mainly used as an electrocaloric element in the heating body, and can be a film sheet structure of graphite, graphene, molybdenum sulfide, tungsten sulfide, cubic boron arsenide, boron nitride, boron phosphide, tantalum nitride, etc. In specific implementation, the two-dimensional material body 30 can specifically select a two-dimensional material whose resistance value in the thickness direction is at least 10 times, 100 times or 1000 times larger than the resistance value in the length direction or the width direction, or it can also be understood that the interlayer resistance of the two-dimensional material body 30 is at least 10 times or 100 times larger than the intralayer resistance. The two-dimensional material body 30 is arranged between the base electrode 10 and the cover electrode 20, and the two surfaces of the two-dimensional material body 30 opposite in the thickness direction are respectively in electrical contact with the base electrode 10 and the cover electrode 20 on the corresponding side (for example, to achieve electrical contact in a close-fitting manner, or to achieve electrical contact between the two-dimensional material body 30 and the electrode through a conductive layer arranged therebetween).

[0065] By connecting the base electrode 10 and the cover electrode 20 to the power supply, the heating body and the power supply form a complete electrical circuit. Since the base electrode 10 and the cover electrode 20 are located on the two sides of the two-dimensional material body 30 in the thickness direction, when the heating body is powered on, the current will flow in the thickness direction of the two-dimensional material body 30 to take advantage of the high resistance characteristics of the two-dimensional material body 30 in the thickness direction, thereby causing the two-dimensional material body 20 to heat up quickly or generate heat, and transferring heat to the base electrode 10 and / or the cover electrode 20. For tubular or sheet-shaped heating bodies, the base electrode 10 or the cover electrode 20 can ultimately be used to heat or atomize the medium to be processed (such as aerosol generating substrate, airflow, etc.); for needle columnar heating bodies, the cover electrode 20 can ultimately be used to heat or atomize the medium to be processed.

[0066] For the sake of distinction and description, the side of the base electrode 10 and the cover electrode 20 facing each other is defined as the joint surface, and the joint surface is divided into a first region and a second region after functional region division; that is, the joint surface of the base electrode 10 and the joint surface of the cover electrode 20 both have or are divided into a first region and a second region; wherein the cover electrode 20 and the base electrode 10 establish a structural connection relationship with each other in the first region, and the second region can be understood as the region corresponding to the two-dimensional material body 30. For example, when the base electrode 10 and the cover electrode 20 both adopt a tubular structure, taking the base electrode 10 as the description object, the first region thereof can be the region part of the outer peripheral surface of the base electrode 10 located at the two axial ends, or it can be a region part located at the two axial ends of the inner peripheral surface of the base electrode 10, or it can be a region part located at the two axial ends of the outer peripheral surface of the cover electrode 20, or it can be a region part located at the two axial ends of the inner peripheral surface of the cover electrode 20. Figure 11The end face portions of the axial two ends of the base electrode 10 shown; for example, the base electrode 10 and the cover electrode 20 both adopt a sheet structure, and the first regions of both refer to the region portions distributed around the two-dimensional material body 30 or the region portions located at the geometric contour periphery of the two-dimensional material body 30.

[0067] By means of vacuumizing treatment between the cover electrode 20 and the base electrode 10 and sealing and fixing the first region of the cover electrode 20 and the first region of the base electrode 10, etc., the two-dimensional material body 30 is finally encapsulated in a vacuum-sealed form between the second region of the base electrode 10 and the second region of the cover electrode 20, and it is ensured that the two-dimensional material body 30 can maintain electrical contact (for example, close contact) with the base electrode 10 and the cover electrode 20, respectively.

[0068] In specific implementation, the region where the base electrode 10 and the cover electrode 20 directly contact each other is provided with electrical insulation, for example, an electrical insulation material layer 40 is arranged in the first region of the base electrode 10 and / or the first region of the cover electrode 20, or the first region of at least one of the base electrode 10 and the cover electrode 20 is made of an electrical insulation material; not only can short circuit caused by direct contact between the base electrode 10 and the cover electrode 20 be prevented, but also it is ensured that the base electrode 10 and the cover electrode 20 are electrically connected through the two-dimensional material body 30.

[0069] Then the two-dimensional material body 30 and the cover electrode 20 are placed on the base electrode 10 in sequence, and the two-dimensional material body 30 is located between the second region of the cover electrode 20 and the base electrode 10; wherein the number of two-dimensional material bodies 30 can be one or multiple, and multiple two-dimensional material bodies 30 are arranged at intervals on the base electrode 10 (in other words, the base electrode 10 and the cover electrode 20 can both have multiple second regions arranged at intervals).

[0070] By means of vacuum welding, vacuum fixing and other process means, the first region of the cover electrode 20 and the first region of the base electrode 10 are sealed and fixed, so that the two-dimensional material body 30 can be vacuum sealed or vacuum encapsulated between the cover electrode 20 and the base electrode 10 under the action of pressure difference, and it is ensured that the two surfaces of the two-dimensional material body 30 in the thickness direction maintain, for example, close electrical contact and close contact relationship with the corresponding side base electrode 10 and cover electrode 20, respectively.

[0071] On one hand, the two-dimensional material body 30 has a high resistance value along its thickness direction, a small impulse current at the start, and other characteristics. By applying a potential difference to the base electrode 10 and the cover electrode 20 to ohmically heat the two-dimensional material body 30, the two-dimensional material body 30 is heated or heated and quickly reaches the upper limit of the heating temperature. At the same time, with the electrical contact relationship between the two-dimensional material body 30 and the base electrode 10 and the cover electrode 20, it is ensured that heat can be quickly transferred to the base electrode 10 and / or the cover electrode 20, so as to ultimately realize the heating or heating function of the heating body to the outside.

[0072] On the other hand, the base electrode 10 and the cover electrode 20 directly vacuum package and protect the two-dimensional material body 30. This can prevent the two-dimensional material body 30 from being oxidized at high temperature, and take advantage of the fact that the two-dimensional material body 30 has strong heat-resistant stability in a vacuum or reducing atmosphere, so that the two-dimensional material body 30 and even the entire heating body can long-term play its unique thermal and electrical advantages, and provide protection for the stable and reliable long-term high-temperature application of the heating body.

[0073] It should be noted that based on the characteristic that the base electrode 10 and the cover electrode 20 can be selectively electrically insulated, the first area and the second area of one of the two can not be pre-divided or set. For example, the placement position of the two-dimensional material body 30 on the base electrode 10 is pre-set, and the first area and the second area of the base electrode 10 are pre-divided. After the cover electrode 20 is arranged on the base electrode 10 and covers the two-dimensional material body 30, the area of the joint surface of the cover electrode 20 corresponding to the two-dimensional material body 30 can be understood as the second area of the cover electrode 20, and the other area of the joint surface can be naturally understood as the first area of the cover electrode 20.

[0074] In one embodiment, please refer to Figures 2 to 4The heating body is a tubular structure. Specifically, the base electrode 10 and the cover electrode 20 are both made of conductive material and have a substantially tubular structure. The outer diameter of the base electrode 10 is slightly smaller than the inner diameter of the cover electrode 20, and the wall thickness of the cover electrode 20 is smaller than that of the base electrode 10. The base electrode 10 can be made of oxygen-free copper pipe, double-layer metal composite pipe with an outer layer of oxygen-free copper, pure aluminum or aluminum alloy pipe, double-layer metal composite pipe with an outer layer of pure aluminum or aluminum alloy, stainless steel pipe (such as SUS430, SUS444, SUS304, SUS316, etc.), Kovar alloy pipe, etc. The cover electrode 20 can be made of thin-walled copper pipe, thin-walled copper pipe with an outer layer of plating (such as nickel, gold, iridium, etc.), thin-walled Kovar alloy pipe, thin-walled pure aluminum or aluminum alloy pipe, thin-walled pure aluminum or aluminum alloy pipe with an outer layer of plating (such as nickel, gold, silver, iridium, etc.), thin-walled titanium alloy pipe, thin-walled stainless steel pipe (such as SUS430, SUS444, SUS304, SUS316, etc.), etc.

[0075] In terms of the overall structure of the heating body, the cover electrode 20 is coaxially sleeved on the outer periphery of the base electrode 10. The outer peripheral surface or outer wall surface of the base electrode 10 is the joint surface of the base electrode 10, and the inner peripheral surface or inner wall surface of the cover electrode 20 is the joint surface of the cover electrode 20. The cover electrode 20 and the base electrode 10 are sealingly and fixedly connected at the peripheral surface parts at the two axial ends. One or more two-dimensional material bodies 30 are vacuum sealed or encapsulated between the cover electrode 20 and the base electrode 10.

[0076] In specific implementation, the two-dimensional material body 30 can be positioned in advance on the second region of the outer peripheral surface of the base electrode 10, and then the cover electrode 20 is sleeved on the base electrode 10. By pumping out the air between the base electrode 10 and the cover electrode 20, the cover electrode 20 collapses under the action of the pressure difference, so that the two-dimensional material body 30 is tightly attached between the cover electrode 20 and the base electrode 10. Subsequently, the peripheral surface parts at the two axial ends of the base electrode 10 and the cover electrode 20 are sealingly and fixedly connected, so that the two-dimensional material body 30 is finally vacuum sealed and encapsulated.

[0077] Of course, the two-dimensional material body 30 can also be entirely covered between the peripheral surfaces of the base electrode 10 and the cover electrode 20. Please refer to Figure 11 At this time, the extension a extending radially outward can be arranged at the ports at the two axial ends of the base electrode 10, or the extension a extending radially inward can be arranged at the breaks at the two axial ends of the cover electrode 20. The two-dimensional material body 30 is finally vacuum sealed between the base electrode 10 and the cover electrode 20 by the abutting relationship between the extension a and the port surface of the corresponding base electrode 10 or cover electrode 20.

[0078] Another embodiment, please refer to Figure 5 and Figure 6 The profile shape of the base electrode 10 is generally a tubular structure of conductive material, and the profile shape of the cover electrode 20 is generally a plate or sheet structure, such as a foil sheet material of conductive material; the cover electrode 20 is sealed and fixed to the partial area of the outer peripheral surface of the base electrode 10 in the form of covering the two-dimensional material body 30. It can be understood that at this time, the first area of the base electrode 10 can be other areas of the outer peripheral surface thereof except the covered area of the two-dimensional material body 30 (see Figure 5 for details), or the partial area of the first area of the outer peripheral surface thereof facing the cover electrode 20 (see Figure 6 for details); that is, the area of the cover electrode 20 outside the geometric profile of the two-dimensional material body 30 is its first area, and is sealed and fixed to the outer wall surface of the base electrode 10.

[0079] In specific implementation, the number of the cover electrode 20 and the two-dimensional material body 30 can be set to be multiple, and multiple cover electrodes 20 and their corresponding two-dimensional material bodies 30 are arranged at different positions of the peripheral surface of the base electrode 10.

[0080] One embodiment, please refer to Figure 1 , Figure 7 and Figure 12 The heating body is a plate structure, specifically, the profile shape of the base electrode 10 and the cover electrode 20 is generally a plate or sheet structure of conductive material, for example, the base electrode 10 is a plate material with a predetermined thickness, and the cover electrode 20 is a foil sheet material with a thickness smaller than that of the base electrode 10; the two-dimensional material body 20 can be arranged on one side or both sides of the base electrode 10, and the cover electrode 20 is sealed and fixed to the base electrode 10 in the form of covering the two-dimensional material body 30.

[0081] One embodiment, please refer to Figures 1 to 12 The first area of the base electrode 10 and / or the cover electrode 20 is made of electrically insulating material, and the second area of the base electrode 10 and / or the cover electrode 20 is made of conductive material; for example, the base electrode 10 is made of conductive material such as metal or alloy, the first area of the cover electrode 20 is made of electrically insulating material, and the second area is made of conductive material; thus, while preventing short circuit caused by direct contact between the base electrode 10 and the cover electrode 20, it is ensured that the base electrode 10 and the cover electrode 20 are electrically connected through the two-dimensional material body 30.

[0082] In other embodiments, the base electrode 10 can also adopt a needle column structure, and the cover electrode 20 adopts a tubular structure or a sheet structure to form a needle column-shaped heating body; for details, please refer to the foregoing embodiments, which will not be repeated here.

[0083] In one embodiment, referring to Figure 7 and Figure 12 and in combination with Figures 1 to 6 and Figure 10 and Figure 11 , the second region of the base electrode 10 is provided with a containing chamber 10a, which is mainly used for accommodating and positioning a corresponding two-dimensional material body 30. Specifically, the containing chamber 10a can be used by providing a groove structure with the same or substantially the same profile as the two-dimensional material body 30 in the second region of the base electrode 10 (which can be recessed on the surface of the base electrode 10 or protrude from the surface of the base electrode 10); during the heating body preparation process, at least part of the corresponding two-dimensional material body 30 (for example, part of the two-dimensional material body 30 is embedded in the containing chamber 10a, and the other part protrudes from the bonding surface of the base electrode 10) is accommodated by the containing chamber 10a, so as to preliminarily position and arrange the two-dimensional material body 30 on the base electrode 10; then the cover electrode 20 is arranged, and subsequent vacuumizing and sealing are performed, so as to form a structure in which the base electrode 10, the two-dimensional material body 30 and the cover electrode 20 are vacuum-sealed and attached.

[0084] In other embodiments, based on the selection of the heating body preparation process, the containing chamber 10a can also be provided in the second region of the cover electrode 20, alone or simultaneously, which will not be described herein.

[0085] Referring to Figures 1 to 12 , in the embodiment in which the base electrode 10 and the cover electrode 20 are both made of conductive materials, the first region of the base electrode 10 is provided with an electrically insulating material layer 40, which is mainly used for electrically insulating the base electrode 10 from the cover electrode 20; the electrically insulating material layer 40 can be made of an aluminum nitride layer, a diamond layer, a glass ceramic, an aluminum oxide layer, a chromium oxide layer, etc. based on the specific material types of the base electrode 10 and the cover electrode 20; and according to the specific material of the electrically insulating material layer 40, the electrically insulating material layer 40 can be formed on the base electrode 10 by sputtering, spraying, printing, nitriding, oxidation, etc. In addition, in the embodiment in which the containing chamber 10a is provided, the electrically insulating material layer 40 can extend to the cavity wall of the containing chamber 10a, so that the front and back surfaces of the two-dimensional material body 30 directly contact the cover electrode 20 and the base electrode 10, thereby ensuring that the parts of the base electrode 10 and the cover electrode 20 that can directly contact each other are insulated from each other.

[0086] In another embodiment, based on the difference in the heating body preparation process, the first region of the cover electrode 20 can also be provided with an electrically insulating material layer 40, alone or simultaneously.

[0087] In one embodiment, referring to Figure 8 and Figure 9The first region of the base electrode 10 is further provided with a compensation structure 10b. The compensation structure 10b can be one or more groove structures arranged at intervals on the bonding surface of the base electrode 10, or can be one or more protrusion structures arranged at intervals on the bonding surface of the base electrode 10. On the one hand, the compensation structure 10b can effectively increase the direct contact area between the base electrode 10 and the cover electrode 20, and ensure that the base electrode 10 and the cover electrode 20 can be firmly sealed and fixed. On the other hand, the compensation structure 10b can compensate for the deformation of the cover electrode 20. Specifically, during vacuum welding or vacuum release, the cover electrode 20 will collapse due to the pressure difference and fit the compensation structure 10b (for example, partially enter the groove form of the compensation structure 10b), so that the cover electrode 20 can wrap the two-dimensional material body 30 like a heat-shrinkable film.

[0088] In a specific implementation, taking the groove form of the compensation structure 10b as an example, the total groove area of the compensation structure 10b depends on the spacing difference between the cover electrode 20 and the base electrode 10. For example, the larger the difference between the outer diameter of the base electrode 10 (including the electrically insulating material layer 40) and the inner diameter of the cover electrode 20, the larger the total groove area of the compensation structure 10b. Thus, the cover electrode 20 and the base electrode 10 can be in sufficient contact and sealed.

[0089] In one embodiment, referring to Figure 12 and combining Figures 1 to 11 The two-dimensional material body 30, the base electrode 10 and the cover electrode 20 can also be in non-direct contact with each other. Specifically, a first conductive layer 50 is arranged between the cover electrode 20 (specifically, the second region thereof) and the two-dimensional material body 30 to realize electrical contact between the cover electrode 20 and the two-dimensional material body 30. A second conductive layer 60 is arranged between the base electrode 10 (specifically, the second region thereof) and the two-dimensional material body 30 to realize electrical contact between the base electrode 10 and the two-dimensional material body 30. The two-dimensional material body 30 can be a single two-dimensional material film structure or a multi-layer film structure formed by stacking different two-dimensional materials. The first conductive layer 50 and the second conductive layer 60 can be formed on the surface of the two-dimensional material body 30, the cover electrode 20 or the base electrode 10 in the form of a film. For example, the first conductive layer 50 and the second conductive layer 60 can be metal films (such as copper, gold, platinum, iridium, etc.) with high conductivity.

[0090] The first conductive layer 50 and the second conductive layer 60 are used to establish a close electrical contact between the two-dimensional material body 30 and the cover electrode 20 (and / or the base electrode 10), so as to ensure the ohmic heating effect of the two-dimensional material body 30.

[0091] In specific implementation, the first conductive layer 50 and the second conductive layer 60 can be made of conductive materials with the same or different thermal conductivities, which can depend on whether the heating body is used to heat or atomize the medium to be treated based on the base electrode 10 or the cover electrode 20.

[0092] For example, when the heating body is in a tubular structure and is used to heat or atomize the medium to be treated based on the base electrode 10, the second conductive layer 60 can be made of a conductive material layer with high thermal conductivity (e.g., a heat-conducting conductive material), and the first conductive layer 50 can be made of a conductive material layer with low thermal conductivity (e.g., a heat-insulating conductive material), so as to enhance the heat transfer between the two-dimensional material body 30 and the base electrode 10 and the heat insulation between the two-dimensional material body 30 and the cover electrode 20, and make the heat generated by the two-dimensional material body 30 be transmitted to the base electrode 10 as much as possible, so as to heat or atomize the medium to be treated based on the base electrode 10.

[0093] For example, when the heating body is in a needle columnar or sheet structure and is used to heat or atomize the medium to be treated based on the cover electrode 20, the second conductive layer 60 can be made of a conductive material layer with low thermal conductivity, and the first conductive layer 50 can be made of a conductive material layer with high thermal conductivity, so as to make the heat generated by the two-dimensional material body 30 be transmitted to the cover electrode 20 as much as possible, so as to heat or atomize the medium to be treated based on the cover electrode 20.

[0094] It should be noted that, in some embodiments, the surfaces (especially the parts exposed to the heating body) of the base electrode 10, the cover electrode 20 and the electrically insulating material layer 40 can also be provided with a protective material layer to prevent oxidation during high-temperature operation or contact with the medium; for example, for the tubular base electrode 10 and cover electrode 20, an anti-oxidation protective layer can be plated on the inner wall surface of the base electrode 10 and the outer wall surface of the cover electrode 20 to prevent rusting; for example, for the cover electrode 20 in a foil sheet structure, an anti-oxidation protective film can be plated on the electrically insulating material layer 40 to avoid damage to the area of the electrically insulating material layer 40 not covered by the cover electrode 20.

[0095] Please refer to Figure 13 and in combination with Figures 1 to 12 The application further provides a preparation method of the heating body, which can be used to prepare the heating body of any of the preceding embodiments; the preparation method comprises steps 100 to 500, which are described below.

[0096] Step 100, selecting the base material of the base electrode 10 and the cover electrode 20, and the specific two-dimensional material body 30.

[0097] According to the specific application and structural form of the heating body, the base material of the base electrode 10 can be selected from copper-based, aluminum-based, stainless steel-based, Kovar alloy-based pipe, plate or column material, and the base material of the cover electrode 20 can be selected from thin-walled pipe or foil sheet of metal material. The two-dimensional material film sheet with an interlayer resistivity of 500-2000 times of the intralayer resistivity can be selected as the two-dimensional material body 30; for example, the interlayer resistivity of the molybdenum sulfide nanofilm sheet is about 2200 times of the intralayer resistivity, and the interlayer resistivity of the graphite film sheet is about 500 times of the intralayer resistivity.

[0098] Specifically, taking the preparation of a heating body with a long-term working temperature up to 400℃ as an example, the physical parameters of the two-dimensional material body 30 can be selected or configured with reference to Table 1.

[0099]

[0100] Step 200, setting the accommodation chamber 10a on the second region of the base material of the base electrode 10 and / or the base material of the cover electrode 20.

[0101] For example, the recess structure with the same or approximately the same contour shape as the two-dimensional material body 30 can be set on the preset region (i.e., the second region) of the outer peripheral surface of the base electrode 10 by machining or other process means to form the accommodation chamber 10a; in order to ensure the setting space of the corresponding components or material layers, the size of the accommodation chamber 10a can be slightly larger than the size of the two-dimensional material body 30; and the two-dimensional material body 30 is allowed to have a small gap between the two-dimensional material body 30 and the side wall of the accommodation chamber 10a after being embedded in the accommodation chamber 10a.

[0102] At the same time, a plurality of recess structures can also be set on the first region of the outer peripheral surface of the base electrode 10 to form the compensation structure 10b.

[0103] Step 300, electrically insulating the first region of the base electrode 10 and / or the first region of the cover electrode 20.

[0104] In order to prevent the base electrode 10 and the cover electrode 20 from being short-circuited due to direct contact, thereby causing problems such as damage to the heating body, failure of the two-dimensional material body 30 to heat or poor heating effect, etc., the region / portion of the base electrode 10 and the cover electrode 20 directly contacting each other needs to be electrically insulated.

[0105] For example, the bottom surface of the accommodating chamber 10a of the base electrode 10 can be protected or shielded in advance, and then an electrically insulating material is prepared or fixed on the base electrode 10 by means of sputtering, spraying, printing, nitriding, oxidation, etc., to form an electrically insulating material layer 40 on the base electrode 10; or the first region of the base electrode 10 and / or the first region of the cover electrode 20 is made of an electrically insulating material.

[0106] Step 400: sequentially arrange the two-dimensional material body 30 and the cover electrode 20 on the base electrode 10, so that the two-dimensional material body 30 is located between the second region of the base electrode 10 and the second region of the cover electrode 20.

[0107] Specifically, the two-dimensional material body 30 can be first positioned and placed in the second region of the base electrode 10 (for example, inserted into the corresponding accommodating chamber 10a), and then the brazing filler metal is arranged at the predetermined position (i.e., the position to be welded) of the first region of the base electrode 10 and / or the cover electrode 20, and finally the cover electrode 20 is sleeved or stacked on the base electrode 10 in a manner of covering the two-dimensional material body 30.

[0108] Among them, the brazing filler metal can be prepared at the position to be welded by means of dispensing, screen printing, spraying or other suitable methods, or can be pre-prepared at a specific position in the first region of the cover electrode 20, or can be a sheet that can be directly placed between the first regions of the base electrode 10 and the cover electrode 20.

[0109] Among them, in the case that the base electrode 10 and the cover electrode 20 both adopt a tubular structure, the cover electrode 20 can be heated to a predetermined temperature (for example, 50-200°C) by means of a hot air gun or a heating device, so that the cover electrode 20 is deformed due to expansion caused by heating; and then the cover electrode 20 is quickly cooled after being sleeved on the base electrode 10, or the cold base electrode 10 is quickly sleeved, so that the two-dimensional material body 30 is wrapped and adhered between the cover electrode 20 and the base electrode 10 by the shrinkage deformation of the cover electrode 20 caused by cooling.

[0110] Step 500: fix and seal the first region of the base electrode 10 and the first region of the cover electrode 20 in a vacuum environment, so as to vacuum-seal the two-dimensional material body 30 between the base electrode 10 and the cover electrode 20, and make the two-dimensional material body 30 tightly contact and adhere to the base electrode 10 and the cover electrode 20, respectively.

[0111] For example, the combined structure of the base electrode 10, the two-dimensional material body 30 and the cover electrode 20 can be placed in a vacuum chamber with a limit vacuum degree of 10*10 -3 Pa to 8*10 -4The base electrode 10, the two-dimensional material body 30 and the cover electrode 20 are combined and placed in a vacuum container with a vacuum degree of 10*10

[0112] For example, the combined structure of the base electrode 10, the two-dimensional material body 30 and the cover electrode 20 can be placed in a vacuum container with a vacuum degree of 10*10 -3 Pa to 8*10 -4 The base electrode 10, the two-dimensional material body 30 and the cover electrode 20 are combined and placed in a vacuum container with a vacuum degree of 10*10

[0113] It should be noted that the entire process of welding or at least the latter half should be carried out in a vacuum state.

[0114] Based on the above preparation method, the two-dimensional material body 30 can be directly vacuum sealed or packaged in the inside of the heating body (i.e. between the base electrode 10 and the cover electrode 20), so as to ensure that the two-dimensional material body 30 can maintain good electrical contact with the electrode, thereby enabling the two-dimensional material body 30 or the entire heating body to long-term, stable and reliable exert its unique thermal and electrical advantages.

[0115] Please refer to Figures 1 to 12 The application also provides an atomization device, such as a heating non-combustion atomization device that heats a medium to be atomized to generate smoke or release volatile substances without combustion. The atomization device includes a shell assembly, a heating body, a control assembly including a power supply module, and other functional components as needed; wherein the heating body adopts the heating body of any of the preceding embodiments, and the base electrode 10 and the cover electrode 20 of the heating body are respectively arranged in electrical connection with the power supply module.

[0116] By applying a potential difference between the base electrode 10 and the cover electrode 20 through the power supply module, the two-dimensional material body 30 can be heated or heated, and the heat can be directly and quickly transferred to the base electrode 10; in this way, the base electrode 10 or the cover electrode 20 can be used to directly heat the atomization medium to be atomized (such as solid drugs, spices, tobacco, etc.), or the atomization medium to be atomized in liquid or semi-solid state can be heated and atomized through the hot gas flow.

[0117] In specific implementation, the shell assembly, the control assembly and other related functional components of the atomization device can be selected and arranged according to the prior art, and therefore will not be described here.

[0118] The above application of specific examples to illustrate the present invention, is only used to help understand the present invention, and does not limit the present invention. For the skilled in the art to which the present invention belongs, according to the idea of the present invention, several simple deductions, deformation or replacement can be made.

Claims

1. A heating element, characterized in that, The device includes a substrate electrode, a capping electrode, and a two-dimensional material body. The capping electrode is arranged facing the substrate electrode, and each of the facing surfaces of the capping electrode and the substrate electrode has a second region and a first region surrounding the second region. An electrically insulating material layer is provided on the first region of the capping electrode and / or the first region of the substrate electrode. This electrically insulating material layer serves to provide electrical insulation between the substrate electrode and the capping electrode, ensuring that the first region of the capping electrode is in contact with and electrically insulated from the first region of the substrate electrode. The two-dimensional material body is vacuum-sealed between the second region of the capping electrode and the second region of the substrate electrode, and its two opposing surfaces in the thickness direction are in electrical contact with the capping electrode and the substrate electrode, respectively.

2. The heating element as described in claim 1, characterized in that, The number of two-dimensional material bodies is set to multiple, and the multiple two-dimensional material bodies are arranged at intervals between the substrate electrode and the capping electrode.

3. The heating element as described in claim 1, characterized in that, The two-dimensional material body includes a membrane structure made of at least one material selected from graphite, graphene, molybdenum sulfide, tungsten sulfide, cubic boron arsenide, boron nitride, boron phosphide, and tantalum nitride.

4. The heating element as described in claim 1, characterized in that, The resistance of the two-dimensional material body in the thickness direction is at least 10 times greater than the resistance in the length or width direction.

5. The heating element as described in claim 1, characterized in that, The second region of the substrate electrode and / or the second region of the capping electrode are provided with a receiving chamber for accommodating at least a portion of the two-dimensional material body.

6. The heating element as claimed in claim 1, characterized in that, The capping electrode and the substrate electrode are vacuum-sealed and fixed in the first region to vacuum seal the two-dimensional material body between the capping electrode and the substrate electrode in the second region.

7. The heating element as described in claim 3, characterized in that, The substrate electrode has a compensation structure on the side facing the capping electrode. The compensation structure is located in the corresponding first region and is used to compensate for the deformation of the capping electrode during vacuum welding.

8. The heating element as claimed in claim 1, characterized in that, The base electrode has a tubular or columnar structure, and the capping electrode has a tubular structure; wherein the capping electrode is sleeved on the outer periphery of the base electrode, and the axial end of the capping electrode and the axial end of the base electrode are electrically insulated and sealed to each other. or The base electrode has a tubular or columnar structure, and the capping electrode has a sheet-like structure; wherein, the capping electrode is stacked on the outer wall surface of the base electrode and covers the two-dimensional material body on the base electrode; the area of ​​the capping electrode outside the geometric contour of the two-dimensional material body is electrically insulated and sealed to the outer wall surface of the base electrode; or Both the substrate electrode and the capping electrode are sheet-like structures. The two-dimensional material body and the capping electrode are stacked sequentially on the substrate electrode, and the areas of the capping electrode and the substrate electrode located outside the geometric contour of the two-dimensional material body are electrically insulated and sealed to each other.

9. The heating element as claimed in claim 1, characterized in that, Both the substrate electrode and the capping electrode are made of conductive material, and at least the first region of the substrate electrode and / or the first region of the capping electrode are provided with the electrically insulating material layer; or The first region of the substrate electrode and / or the first region of the capping electrode is an electrically insulating material layer made of an electrically insulating material, and the second region of the substrate electrode and / or the second region of the capping electrode is made of a conductive material.

10. The heating element as claimed in claim 1, characterized in that, A first conductive layer is disposed between the capping electrode and the two-dimensional material body to achieve electrical contact between the capping electrode and the two-dimensional material body; a second conductive layer is disposed between the substrate electrode and the two-dimensional material body to achieve electrical contact between the substrate electrode and the two-dimensional material body.

11. The heating element as claimed in claim 10, characterized in that, One of the first conductive layer and the second conductive layer is a conductive layer with low thermal conductivity, and the other of the first conductive layer and the second conductive layer is a conductive layer with high thermal conductivity.

12. An atomizing device, characterized in that, It includes a power supply module and a heating element as described in any one of claims 1-11, wherein the base electrode and the capping electrode are respectively electrically connected to the power supply module.

13. A method for preparing a heating element as described in claim 1, characterized in that, include: Electrical insulation is provided for the first region of the substrate electrode and / or the first region of the capping electrode; The two-dimensional material body and the capping electrode are arranged sequentially on the substrate electrode, such that the two-dimensional material body is located between the second region of the substrate electrode and the capping electrode; In a vacuum environment, the first region of the substrate electrode and the first region of the capping electrode are fixed and sealed to vacuum seal the two-dimensional material body between the substrate electrode and the capping electrode, and to make the two-dimensional material body electrically contact the substrate electrode and the capping electrode respectively.

14. The preparation method according to claim 13, characterized in that, The electrical insulation setting of the first region of the substrate electrode and / or the first region of the capping electrode includes: An electrically insulating material is fixed to a first region of the substrate electrode and / or a first region of the capping electrode by at least one of sputtering, spraying, printing, nitriding and oxidation to form an electrically insulating material layer. and / or Before electrically insulating the first region of the substrate electrode and / or the capping electrode, the method further includes: providing a receiving chamber in the second region of the substrate electrode to accommodate at least a portion of the two-dimensional material body.

15. The preparation method according to claim 13, characterized in that, The step of sequentially arranging the two-dimensional material body and the capping electrode on the substrate electrode includes: The two-dimensional material body is positioned in the second region of the substrate electrode; Brazing filler is applied at a preset position in the first region of the base electrode and / or the first region of the capping electrode after electrical insulation is applied; The capping electrode is arranged on the substrate electrode in such a way that it covers the two-dimensional material body; The method of fixing and sealing the first region of the substrate electrode and the first region of the capping electrode in a vacuum environment includes: placing the combined structure of the substrate electrode, the two-dimensional material body and the capping electrode in a vacuum environment, and performing brazing sealing treatment on the first regions of the substrate electrode and the capping electrode.

16. The preparation method according to claim 13, characterized in that, Both the substrate electrode and the capping electrode are tubular structures; the step of sequentially arranging the two-dimensional material body and the capping electrode on the substrate electrode includes: The two-dimensional material body is positioned in the second region of the substrate electrode; The capped electrode is heated to a preset temperature to cause the capped electrode to expand and deform. The capping electrode, which has undergone expansion deformation, is placed on the substrate electrode and then rapidly cooled, or the capping electrode, which has undergone expansion deformation, is rapidly placed on the cold substrate electrode to encapsulate the two-dimensional material body between the capping electrode and the substrate electrode.

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