Patent Description:
As more attention is paid to the health of human bodies, people are aware of harm of tobacco to the bodies. Therefore, an electronic atomization device is made. The electronic atomization device has an appearance and taste similar to the cigarette, but generally does not include tar, suspended particles, and other harmful ingredients in the cigarette, which greatly reduces harm to a user's body. Therefore, the electronic atomization device is generally used as a substitute for the cigarette and used for giving up smoking.

The electronic atomization device generally includes an atomization assembly and a power supply assembly. A heating element of the atomization assembly of the electronic atomization device currently on the market includes a spring-shaped heating wire. In a producing process of the heating element, a linear heating wire is wound around a fixed shaft; and when the heating wire is powered on, an aerosol-generating material stored on the storage medium is adsorbed onto the fixed shaft and then are atomized by the heating of the heating wire. Another heating element includes a nested combination of a ceramic and a heating wire, but the atomization efficiency is less and aerosol-generating material is leakage to occur. The technology related to the heating element further includes producing a thin-film heating element on a porous ceramic substrate. However, the thin-film heating element has a poor stability of the resistance value and a short service life.

<CIT> discloses an electronic cigarette, an atomization assembly and an atomization component for the same. The atomization component comprises a porous base, a first film, and a second film. The porous base material comprises an atomization surface. The first film and the second film are sequentially formed on the atomization surface. At least one of the first film or the second film is used for generating heat when charged, so as to heat and atomize an e-liquid on the atomization surface.

<CIT> discloses a heater element, device provided therewith and method for manufacturing such heater element. The heater element comprises a heater of a resistance heating metal that is provided in, at or close to a fluid path configured for heating fluid, wherein the heater comprises a conductor that is provided with a porous ceramic layer. In embodiments, the ceramic layer is provided on or at the conductor with plasma electrolytic oxidation. The ceramic layer has a thickness in the range of <NUM>-<NUM>.

<CIT> discloses a forming method for a heating element of an electronic cigarette and a manufacturing method for an atomization assembly, the forming method comprises coiling a heating wire into a heating coil, dividing the heating coil into sections including a plurality of heating sections and connecting sections; providing a deposition preventing layer on an external surface of the heating section; electroplating the heating coil, coating outer peripheral faces of all of the connecting sections of the heating coil with coatings having an electrical resistivity lower than that of the heating wire; removing the deposition preventing layer; and cutting the heating coil electroplated. The present application makes the manufacturing process of the heating element and the atomization assembly continues automatically, the production efficiency is improved, the resistance of the heating element or atomization assembly manufactured is more stable, and the product quality is higher.

The present disclosure provides an electronic atomization device, an atomization assembly, an atomization element, and a method for making the atomization element, to overcome the problem that a resistance value of a conductive layer increases excessively fast.

In order to overcome the aforementioned technical problem, a first technical solution provided in the present invention, as defined in claim <NUM>, is an atomization element of an electronic atomization device, the atomization element includes: a porous substrate and a heating layer, the porous substrate includes an atomization surface, and the heating layer covers the atomization surface, the heating layer includes a conductive layer and a stabilizing layer, the conductive layer covers the atomization surface, and the stabilizing layer covers a surface of the conductive layer far away from the porous substrate; and a resistivity of the stabilizing layer is higher than a resistivity of the conductive layer, and oxidation resistance of the stabilizing layer is lower than oxidation resistance of the conductive layer.

Furthermore, a material of the stabilizing layer is selected from the group consisting of an aluminum, a zinc, a tin, a magnesium and a titanium; and a material of the conductive layer is selected from the group consisting of a titanium, a zirconium, a niobium, a tantalum and a <NUM> stainless steel.

Furthermore, the material of the stabilizing layer is the aluminum; and the material of the conductive layer is a Ti-Zr alloy.

Furthermore, a thickness of the heating layer in the range of <NUM> to <NUM>, a thickness of the stabilizing layer in the range of <NUM> to <NUM>, and a thickness of the conductive layer in the range of <NUM> to <NUM>.

Furthermore, the atomization element further includes: a first electrode and a second electrode located on the stabilizing layer far away from the porous substrate, wherein a part of the stabilizing layer is covered by the first electrode and the second electrode.

Furthermore, materials of the first electrode and the second electrode are silver.

In order to overcome the aforementioned technical problem, a second technical solution provided in the present disclosure is an atomization assembly of an electronic atomization device, the atomization assembly includes: a liquid storage chamber, configured to store an aerosol-generating material and the atomization element is the atomization element according to any one of the aforementioned, the aerosol-generating material in the liquid storage chamber is able to be transferred to the atomization surface.

In order to overcome the aforementioned technical problem, a third technical solution provided in the present disclosure is an electronic atomization device, includes: a power supply assembly and the atomization assembly according to the aforementioned, the power supply assembly is electrically connected to the atomization assembly to supply power to the atomization element of the atomization assembly.

In order to overcome the aforementioned technical problem, a further technical solution provided in the present invention, as defined in claim <NUM>, is a method for making an atomization element of an electronic atomization device, includes: providing a porous substrate, the porous substrate includes an atomization surface; disposing a conductive layer on the atomization surface of the porous substrate; and disposing a stabilizing layer on a surface of the conductive layer far away from the porous substrate, a resistivity of the stabilizing layer is higher than a resistivity of the conductive layer, and oxidation resistance of the stabilizing layer is lower than oxidation resistance of the conductive layer.

Furthermore, the step of disposing a conductive layer on the atomization surface of the porous substrate includes: disposing the conductive layer on the atomization surface of the porous substrate by adopting a direct-current sputtering deposition process or a magnetron sputtering deposition process; and/or the step of disposing a stabilizing layer on a surface of the conductive layer far away from the porous substrate includes: forming the stabilizing layer on one side of the conductive layer far away from the porous substrate by adopting the direct-current sputtering deposition process or the magnetron sputtering deposition process.

Furthermore, the method further includes: disposing a first electrode and a second electrode on one side of the stabilizing layer far away from the porous substrate and covering a part of the stabilizing layer in a screen-printing manner, and taking a process of low-temperature sintering on the first electrode and the second electrode.

Furthermore, a total thickness of the stabilizing layer and the conductive layer in the range of <NUM> to <NUM>, a thickness of the stabilizing layer in the range of <NUM> to <NUM>, and a thickness of the conductive layer in the range of <NUM> to <NUM>; and/or a material of the stabilizing layer is selected from the group consisting of an aluminum, a zinc, a tin, a magnesium and a titanium; and a material of the conductive layer is selected from the group consisting of a titanium, a zirconium, a niobium, a tantalum and a <NUM> stainless steel.

Furthermore, the method further comprising: disposing a first electrode and a second electrode located on the stabilizing layer far away from the porous substrate, and a part of the stabilizing layer is covered by the first electrode and the second electrode.

Beneficial effects of the present disclosure are as follows. Different from the related art, in the present disclosure, a conductive layer and a stabilizing layer are formed on an atomization surface of a porous substrate, a resistivity of the stabilizing layer is higher than a resistivity of the conductive layer, and oxidation resistance of the stabilizing layer is lower than oxidation resistance of the conductive layer. In the present disclosure, a resistance value of the conductive layer is relatively stable during heating, and does not increase excessively fast, thereby overcoming the problem that the resistance value of the conductive layer increases excessively fast, and bringing an excellent and stable taste to the user.

In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings for the description of the embodiment will be described in brief. Obviously, the drawings in the following description are only some of the embodiments of the present disclosure. For a person of ordinary skill in the art, other drawings may be obtained based on the following drawings without any creative work.

Technical solutions of the embodiments of the present disclosure will be clearly and comprehensively described by referring to the accompanying drawings. Obviously, the embodiments described herein are only a part of, but not all of, the embodiments of the present disclosure.

It should be noted that directional indications if present (such as up, down, left, right, front, back,. ) in the embodiments of the present disclosure are only expressed to explain relative positional relationships and movement between components in a particular attitude (as shown in the drawings). When the particular attitude is changed, the directional indications shall also be changed accordingly.

In addition, when using expressions "first", "second", and the like in the embodiment of the present disclosure, the expressions "first", "second", and the like are utilized for descriptive purposes only, and shall not be interpreted as indicating or implying relative importance or implicitly specifying the number of an indicated technical feature. Therefore, features defined by "first" and "second" may explicitly or implicitly include at least one of the such feature. In addition, technical solutions of various embodiments may be combined with each other, but only on the basis that the technical solutions may be achieved by a person of ordinary skill in the art. When combination of technical solutions appears to be contradictory or unachievable, such combination of technical solutions shall be interpreted as inexistence and excluded from the scope of the present disclosure.

The term "comprising" means "including, but not necessarily limited to"; it specifically indicates open-ended inclusion or membership in a so-described combination, group, series and the like. It should be noted that references to "an" or "one" embodiment in this disclosure are not necessarily to the same embodiment, and such references mean at least one. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as a skilled person in the art would understand. The terminology used in the description of the present disclosure is for the purpose of describing particular embodiments and is not intended to limit the disclosure.

Existing common ceramic heating wires cannot heat evenly, and an aerosol-generating material is leakage occur during atomizing. A heating film of a nitride type has a poor stability and a short heating service life. A heating wire of a noble metal type has high costs, and particles are easy to reunite. In order to reduce an increase in the resistance value, the present disclosure provides a new type electronic atomization device, atomization assembly, atomization element, and a method for making the atomization element, which will be described below with reference to the accompanying drawings and embodiments.

Referring to <FIG>, the electronic atomization device of the present disclosure includes an atomization assembly <NUM> and a power supply assembly <NUM>. The power supply assembly <NUM> is electrically connected to the atomization assembly <NUM>, and supply power to the atomization assembly <NUM>.

In one embodiment, the power supply assembly <NUM> is detachably connected to the atomization assembly <NUM>, so that any one of the atomization assembly <NUM> and the power supply assembly <NUM> can be replaced if they are damaged. In other embodiments, the power supply assembly <NUM> and the atomization assembly <NUM> may share a same housing, so that the electronic atomization device can be an integral structure and then the electronic atomization device is more convenient to carry. A specific connection manner of the power supply assembly <NUM> and the atomization assembly <NUM> is not limited in the embodiments of the present disclosure.

Referring to <FIG> and <FIG>, the atomization assembly <NUM> includes a liquid storage chamber <NUM>, a cover <NUM>, an airflow channel <NUM>, and an atomization element <NUM>. The atomization element <NUM> is disposed inside the cover <NUM>, the cover <NUM> is configured to deliver the aerosol-generating material in the liquid storage chamber <NUM> into the atomization element <NUM>, and the airflow channel <NUM> is in communication with an atomization surface of the atomization element <NUM> to output an atomized aerosol.

In one embodiment, the cover <NUM> may include a guiding portion <NUM>, a matching portion <NUM>, and a capacity portion <NUM> that are connected in that order. The guiding portion <NUM> is provided with a liquid inlet hole <NUM> and an air outlet hole <NUM>, the liquid inlet hole <NUM> is in communication with the liquid storage chamber <NUM>, and the air outlet hole <NUM> is in communication with the airflow channel <NUM>. A cavity chamber <NUM> for accommodating the atomization element <NUM> is formed on the capacity portion <NUM>, and the atomization element <NUM> is accommodated in the cavity chamber <NUM>. The matching portion <NUM> is configured to communicate the guiding portion <NUM> with the capacity portion <NUM>, to deliver the aerosol-generating material in the liquid inlet hole <NUM> to the atomization element <NUM>.

The atomization element <NUM> is configured to atomize the delivered the aerosol-generating material into aerosol by heating. The air outlet hole <NUM> is in communication with the atomization surface of the atomization element <NUM>, the aerosol-generating material is heated on the atomization surface and atomized into the aerosol, and the aerosol is delivered through the airflow channel <NUM> from the air outlet hole <NUM>.

In one embodiment, referring to <FIG> and <FIG>, the cover <NUM> is an integrally-formed component. For example, the liquid inlet hole <NUM> and the air outlet hole <NUM> are separately provided on an end surface of the cover <NUM> close to the liquid storage chamber <NUM>, and the cavity chamber <NUM> is formed on an end surface of the capacity portion <NUM> far away from the liquid storage chamber <NUM>; and finally, a through hole communicated the liquid inlet hole <NUM> with the cavity chamber <NUM> is provided on the matching portion <NUM>. Certainly, the guiding portion <NUM>, the matching portion <NUM>, and the capacity portion <NUM> may alternatively be made on the cover <NUM> in other machining sequences or manners. That will not be specifically limited herein.

Since the guiding portion <NUM>, the matching portion <NUM>, and the capacity portion <NUM> are integrally formed structure, the number of elements of the atomization assembly <NUM> can be reduced, so that a mounting of the atomization assembly <NUM> is more convenient and the sealing performance is better.

<FIG> is a schematic structural diagram of an embodiment of an atomization element of an electronic atomization device according to the present disclosure. The atomization element <NUM> includes a porous substrate <NUM> and a heating layer. The heating layer includes a conductive layer <NUM> and a stabilizing layer <NUM>. The porous substrate <NUM> includes the atomization surface <NUM>, and the conductive layer <NUM> and the stabilizing layer <NUM> are formed on the atomization surface <NUM> in that order. The aerosol-generating material in the liquid storage chamber <NUM> is delivered to the porous substrate <NUM> through the cover <NUM> and is further delivered onto the atomization surface <NUM> by the porous substrate <NUM>. Therefore, the aerosol-generating material on the atomization surface <NUM> may be heated when the conductive layer <NUM> and/or the stabilizing layer <NUM> is powered on to generate heat, thereby atomizing the aerosol-generating material into aerosol.

The porous substrate <NUM> is made of a material with a porous structure, and to be specific, the material may be a porous ceramic, a porous glass, a porous plastic, a porous metal etc. The material of the porous substrate <NUM> is not specifically limited in present disclosure. In one embodiment, the porous substrate <NUM> may be made of a material having relatively low temperature resistance, for example, the porous plastic. In another embodiment, the porous substrate <NUM> may be made of a conductive material with a conductive function, for example, the porous metal.

The porous ceramic has stable chemical properties, and does not chemically react with an aerosol-generating material. The porous ceramic has a high temperature resistance and does not deform due to an excessively high heating temperature. The porous ceramic is an insulator, and is not electrically connected to the conductive layer <NUM> formed on the porous ceramic to cause a short circuit; and the porous ceramic has advantages of easy manufacturing and low cost. Therefore, in the embodiment, the porous ceramic is selected to make the porous substrate <NUM>.

In an embodiment, a porosity of the porous ceramic may in the range of <NUM>% to <NUM>%. The porosity refers to a ratio of a total volume of tiny pores in a porous medium to a total volume of the porous medium. The size of the porosity may be adjusted according to ingredients of the aerosol-generating material. For example, a relatively high porosity is selected when a viscosity of the aerosol-generating material is relatively large, so as to ensure delivery efficiency of the aerosol-generating material.

In another embodiment, the porosity of the porous ceramic may in the range of <NUM>% to <NUM>%. The porosity of the porous ceramic is controlled in the range of <NUM>% to <NUM>%, on the one hand, the delivery efficiency of the porous ceramic can be ensured, and dry burning caused by poor circulation of the aerosol-generating material is avoided, thereby the atomizing effect is improved. On the other hand, the case that the aerosol-generating material is delivered too fast by the porous ceramic, making it difficult to keep the aerosol-generating material and causing a greatly increased probability of aerosol-generating material leakage can be avoided.

Further, in one embodiment, the conductive layer <NUM> and the stabilizing layer <NUM> are both porous films. The conductive layer <NUM> may be disposed on the atomization surface <NUM> of the porous substrate <NUM> by adopting a direct-current sputtering deposition process or a magnetron sputtering deposition process. The stabilizing layer <NUM> may be formed on one side of the conductive layer <NUM> far away from the porous substrate <NUM> by adopting the direct-current sputtering deposition process or the magnetron sputtering deposition process.

Further, the atomization element further includes a first electrode <NUM> and a second electrode <NUM> located on the stabilizing layer <NUM> far away from the porous substrate <NUM> and cover a part of the stabilizing layer <NUM> in present disclosure.

In one embodiment, a resistivity of the stabilizing layer <NUM> is higher than a resistivity of the conductive layer <NUM>, and oxidation resistance of the stabilizing layer <NUM> is lower than oxidation resistance of the conductive layer <NUM>. In a specific embodiment, a material of the stabilizing layer <NUM> is selected from the group consisting of an aluminum, a zinc, a tin, a magnesium and a titanium. A material of the conductive layer <NUM> is selected from the group consisting of a titanium, a zirconium, a niobium, a tantalum and a <NUM> stainless steel. Materials of the first electrode <NUM> and the second electrode <NUM> are silver. In an embodiment, the material of the stabilizing layer <NUM> is aluminum. The material of the conductive layer <NUM> is a Ti-Zr alloy.

The features of the titanium and zirconium are as follows.

Furthermore, since the titanium-zirconium in a Ti-Zr alloy film has poor stability in the air at high temperature, zirconium can easily absorb hydrogen gas, nitrogen gas, and oxygen gas, and the Ti-Zr alloy has better inspiratory after alloying, thus the stabilizing layer <NUM> is needed to cover the conductive layer <NUM> after the conductive layer <NUM> is made, and the material of the stabilizing layer <NUM> is aluminum.

In an embodiment, after the stabilizing layer <NUM> (an aluminum layer) is made, the first electrode <NUM> and the second electrode <NUM> are made in a screen-printing manner, and taking a process of low-temperature sintering on the first electrode <NUM> and the second electrode <NUM>. The first electrode <NUM> and the second electrode <NUM> cover a part of the stabilizing layer <NUM>. On the one hand, when the first electrode <NUM> and the second electrode <NUM> are formed in a low-temperature sintering manner, a relatively dense aluminum oxide layer is formed on a surface of the stabilizing layer <NUM>, so that the conductive layer <NUM> can be isolated from air, thereby a resistance value of the conductive layer <NUM> can be prevented from being increased, to overcome the problem of the suction taste being changed and suction instability due to an increase in a resistance value of the heating layer. On the other hand, when the first electrode <NUM> and the second electrode <NUM> are made in the low-temperature sintering manner, as the first electrode <NUM> and the second electrode <NUM> are sintered, thereby a region of the stabilizing layer <NUM> covered by the first electrode <NUM> and the second electrode <NUM> can be prevented from being oxidized, and contact resistance can be avoided.

Since a melting point of aluminum is <NUM> and a melting point of aluminum oxide is <NUM>, the stabilizing layer <NUM> can maintain the stability and a particle reuniting is not easy to occur during atomizing. Compared with the case that particle reuniting is easy to occur in a noble metal protective layer such as Au/Ag during atomizing and causing failure of a heating element, selecting aluminum as the material of the stabilizing layer <NUM> can overcome this issue. On the other hand, aluminum oxide has same main ingredients as the ceramic, which has a low thermal expansion coefficient, and has smaller deformation during current surge.

The stabilizing layer <NUM> is made of aluminum, and the overall resistivity is larger than that of a noble metal. A resistivity of the noble metal in the range of <NUM> ohms to <NUM> ohms, and the resistivity of aluminum has a minimum value of about <NUM> ohm through parameter adjustment and substantially in the range of <NUM> ohms to <NUM> ohms. In addition, resistivities of the conductive layer <NUM> and the stabilizing layer <NUM> are relatively close by adopting the aforementioned method, which can prevent a current of one of the layers from being excessively large. Theoretically, a thermal expansion coefficient of the noble metal gold is <NUM>, but a thermal expansion coefficient of aluminum oxide formed after aluminum is sintered is about half of gold, namely, <NUM>. Therefore, a deformation rate of the conductive layer is lower during sucking, and the stability is improved.

In a specific embodiment, a thickness of the heating layer is in the range of <NUM> to <NUM>; the heating layer includes the conductive layer <NUM> and the stabilizing layer <NUM>. For example, the thickness of the conductive layer <NUM> is in the range of <NUM> to <NUM>, and the thickness of the stabilizing layer <NUM> is in the range of <NUM> to <NUM>.

In summary, in the embodiments of the present disclosure, the material of the conductive layer <NUM> is selected from the group consisting of the titanium, the zirconium, the niobium, the tantalum and the <NUM> stainless steel, and the material of the stabilizing layer <NUM> is selected from the group consisting of the aluminum, the zinc, the tin, the magnesium, and the titanium. Furthermore, the first electrode <NUM> and the second electrode <NUM> are made in the low-temperature sintering manner, so as to the service life of the heating element is prolonged, and the increase of the resistance value is reduced, and the contact resistance is avoided.

<FIG> is a schematic flow diagram of a first embodiment of a method for making an atomization element of an electronic atomization device according to the present disclosure.

Step S51: providing a porous substrate; the porous substrate including an atomization surface.

The porous substrate is made of a material with a porous structure, and to be specific, the material may be a porous ceramic, a porous glass, a porous plastic, a porous metal etc. The material of the porous substrate is not specifically limited in present disclosure. In one embodiment, the porous substrate may be made of a material having relatively low temperature resistance, for example, the porous plastic. In another embodiment, the porous substrate may be made of a conductive material with a conductive function, for example, the porous metal. The porous substrate includes the atomization surface.

Step S52: disposing a conductive layer on the atomization surface of the porous substrate.

The conductive layer is formed on the atomization surface of the porous substrate by adopting a magnetron sputtering deposition process or a direct-current sputtering deposition process. For example, a material of the conductive layer is selected from the group consisting of the titanium, the zirconium, the niobium, the tantalum and the <NUM> stainless steel. Take the conductive layer which is disposed by adopting the direct-current sputtering deposition process for example, a specific method is as follows: A vacuum degree is kept in a range of <NUM>×<NUM>-<NUM> Pa to <NUM>×<NUM>-<NUM> Pa; a power is kept in a range of <NUM> W to <NUM> W, and a time is kept in a range of <NUM> to <NUM>; and a pressure is kept in a range of <NUM> Pa to <NUM> Pa, a temperature is kept in a range of a room temperature to <NUM>, and a particle diameter is kept approximately in a range of <NUM> to <NUM>.

Step S53: disposing a stabilizing layer on a surface of the conductive layer far away from the porous substrate.

The stabilizing layer is disposed on the surface of the conductive layer far away from the porous substrate by adopting the magnetron sputtering deposition process or the direct-current sputtering deposition process. For example, the material of the stabilizing layer is selected from the group consisting of the aluminum, the zinc, the tin, the magnesium, and the titanium. Take the stabilizing layer which is disposed by adopting the direct-current sputtering deposition process for example, a specific method is as follows: A time is in the range of <NUM> to <NUM>, a power is in the range of <NUM> W to <NUM> W, a pressure is in the range of <NUM> Pa to <NUM> Pa, and a temperature is in the range of a room temperature to <NUM>. A particle diameter ranges approximately from <NUM> to <NUM>.

In one embodiment, the conductive layer and the stabilizing layer are formed on the atomization surface in that order. An aerosol-generating material in the liquid storage chamber is delivered to the porous substrate through the cover and is further delivered onto the atomization surface by the porous substrate. Therefore, the aerosol-generating material on the atomization surface may be heated when the conductive layer and/or the stabilizing layer is powered on to generate heat, thereby atomizing the aerosol-generating material into aerosol.

In an embodiment, a total thickness of the conductive layer and the stabilizing layer is <NUM>; a thickness of the conductive layer is in the range of <NUM> to <NUM>, and a thickness of the stabilizing layer is in the range of <NUM> to <NUM>.

In an embodiment, a resistivity of the stabilizing layer is higher than a resistivity of the conductive layer, and oxidation resistance of the stabilizing layer is lower than oxidation resistance of the conductive layer. For example, the material of the stabilizing layer is aluminum, and the material of the conductive layer is a Ti-Zr alloy.

In the present disclosure, the material of the conductive layer is selected from the group consisting of the titanium, the zirconium, the niobium, the tantalum and the <NUM> stainless steel, and the material of the stabilizing layer is selected from the group consisting of the aluminum, the zinc, the tin, the magnesium, and the titanium. Therefore, the relatively dense aluminum oxide layer can be formed on the surface of the stabilizing layer, so that the conductive layer can be isolated from air, thereby the resistance value of the conductive layer can be reduced, to overcome the problem of the suction taste being changed and suction instability due to the increase in the resistance value of the conductive layer.

<FIG> is a schematic flow diagram of a second embodiment of a method for making an atomization element of an electronic atomization device according to the present disclosure.

Step S61, step S62, and step S63 are respectively the same as step S51, step S52, and step S53 in the first embodiment shown in <FIG>. A difference is, the embodiment further includes step S64: disposing a first electrode and a second electrode cover a part of the stabilizing layer on one side of the stabilizing layer far away from the porous substrate in a screen-printing manner, and taking a process of low-temperature sintering on the first electrode and the second electrode.

Claim 1:
An atomization element (<NUM>) of an electronic atomization device, the atomization element (<NUM>) comprising:
a porous substrate (<NUM>) and a heating layer, wherein the porous substrate (<NUM>) comprises an atomization surface (<NUM>), and the heating layer covers the atomization surface (<NUM>), wherein
the heating layer comprises an electrically conductive layer (<NUM>) and a stabilizing layer (<NUM>), the electrically conductive layer (<NUM>) covers the atomization surface (<NUM>), and the stabilizing layer (<NUM>) covers a surface of the
electrically conductive layer (<NUM>) which is opposite to the surface which is in contact with the porous substrate (<NUM>); and
characterized by that, an electrical resistivity of the stabilizing layer (<NUM>) is higher than an electrical resistivity of the electrically conductive layer (<NUM>), and oxidation resistance of the stabilizing layer (<NUM>) is lower than oxidati resistance of the electrically conductive layer (<NUM>).