Heating element, preparation method thereof and heating non-combustion device

Abstract

The embodiment of the invention provides a heating element, a preparation method thereof and a heating non-combustion device, the heating element comprises a substrate, a heating layer and an insulating layer, the heating layer is arranged on the substrate, the insulating layer covers the heating layer, the material of one side, close to the heating layer, of the insulating layer at least comprises glass glaze, and the glass glaze is arranged on the substrate. And the material of one side, far away from the heating layer, of the insulating layer at least comprises a wear-resistant material. According to the heating element provided by the embodiment of the invention, the wear-resistant material is added into the insulating layer, and the wear-resistant material can enhance the overall wear resistance of the insulating layer and delay the falling of the glass glaze from the heating layer, so that the technical problems that the glass glaze layer in the existing heating element is easy to peel off and the service life of the heating element is influenced are solved.

Description

Technical Field

[0001] The present application relates to the technical field of low-temperature smoking articles, and in particular to a heating element and a preparation method thereof, and a heating without burning device. Background Art

[0002] In recent years, as people's health awareness has increased, new tobacco products such as heat-not-burn devices have gained widespread attention in the tobacco market.

[0003] The heating element in the existing heat-not-burn device needs to print a glass glaze layer on the surface after printing the heating layer on the surface of the substrate using a resistor paste to prevent oxidation of the heating layer and adhesion of soot on the heating layer.

[0004] However, the glass glaze layer is easy to peel off during use, resulting in direct contact between the heating layer and the tobacco leaves, causing tobacco stains to deposit and the heating layer to be oxidized, thus affecting the service life of the heating element. Summary of the invention

[0005] The technical problem to be solved by the present application is to provide a heating element and a preparation method thereof, and a heating without burning device, so as to solve the technical problem that the glass glaze layer of the heating element in the existing heating without burning device is easy to peel off, thus affecting the service life of the heating body.

[0006] In order to solve the above problems, the present application is implemented through the following technical solutions:

[0007] The present application proposes a heating element, which includes a substrate, a heating layer and an insulating layer, wherein the heating layer is arranged on the substrate, the insulating layer covers the heating layer, the material of the side of the insulating layer close to the heating layer includes at least glass glaze, and the material of the side of the insulating layer away from the heating layer includes at least wear-resistant material.

[0008] Furthermore, in the heating element, the insulating layer includes a glass glaze layer and a wear-resistant layer; the glass glaze layer is arranged to cover the heating layer, and the material of the glass glaze layer includes the glass glaze; the wear-resistant layer covers the glass glaze layer, and the material of the durable layer includes the wear-resistant material.

[0009] Furthermore, in the heating element, the wear-resistant material includes at least one of diamond, silicon carbide, boron carbide, zirconium oxide, aluminum oxide, silicon nitride, boron nitride, tungsten carbide, tantalum carbide, and chromium carbide.

[0010] Furthermore, in the heating element, the thickness of the glass glaze layer is 0.01 to 0.3 mm; and / or the thickness of the wear-resistant layer is 0.01 to 0.3 mm.

[0011] Furthermore, in the heating element, the material of the insulating layer on the side close to the heating layer is the same as the material of the insulating layer on the side away from the heating layer, and the material of the insulating layer includes glass glaze and wear-resistant material, the wear-resistant material is dispersed in the glass glaze, and the wear-resistant material is an insulating material.

[0012] Furthermore, in the heating element, the wear-resistant material includes at least one of diamond, silicon carbide, boron carbide, zirconium oxide, aluminum oxide, silicon nitride, and boron nitride.

[0013] Furthermore, in the heating element, the thickness of the insulating layer is 0.01-0.3 mm.

[0014] Furthermore, in the heating element, the mass percentage of the glass glaze in the insulating layer is 30-90%, and the mass percentage of the wear-resistant material is 10-70%.

[0015] Furthermore, in the heating element, the melting point of the glass powder is lower than the melting point of the heating layer, and the melting point of the glass powder is higher than the working temperature of the heating element.

[0016] Furthermore, in the heating element, the melting point of the glass powder is 450-800°C.

[0017] The present application also proposes a method for preparing a heating element, which comprises:

[0018] Printing resistor paste on the substrate and sintering to form a heating layer;

[0019] An insulating layer is formed on the heating layer to obtain a heating element, wherein the material of the insulating layer on a side close to the heating layer at least includes glass glaze, and the material of the insulating layer on a side away from the heating layer at least includes wear-resistant material.

[0020] Furthermore, in the preparation method, forming an insulating layer on the heating layer comprises:

[0021] Mixing glass powder, wear-resistant material, solvent, dispersant and thickener to form wear-resistant glaze, wherein the wear-resistant material is insulating material;

[0022] The wear-resistant glaze is coated on the heating layer and sintered at a first temperature to form the insulating layer; wherein the first temperature is lower than the sintering temperature for sintering to form the heating layer.

[0023] Furthermore, in the preparation method, forming an insulating layer on the heating layer comprises:

[0024] Mixing glass powder, solvent, dispersant and thickener to form glass glaze;

[0025] Applying the glass glaze on the heating layer and sintering at a second temperature to form the glass glaze layer; wherein the second temperature is lower than the sintering temperature for forming the heating layer;

[0026] The wear-resistant layer is formed by depositing a wear-resistant material on the glass glaze layer by vapor deposition.

[0027] The present application also proposes a heating without burning device, which includes the heating element as described above.

[0028] Compared with the prior art, the embodiments of the present application have the following advantages:

[0029] In the embodiment of the present application, the heating element provided includes a substrate, a heating layer and an insulating layer, the heating layer is arranged on the substrate, the insulating layer covers the heating layer, the material of the side of the insulating layer close to the heating layer includes at least glass glaze, and the material of the side of the insulating layer away from the heating layer includes at least wear-resistant material. Among them, the presence of the wear-resistant material can enhance the overall wear resistance of the insulating layer, delay the glass glaze from falling off the heating layer, thereby improving the technical problem that the glass glaze layer in the existing heating element is easy to peel off, affecting the service life of the heating element.

[0030] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 is a cross-sectional schematic diagram of a heating element provided in one embodiment of the present application;

[0032] Figure 2 yes Figure 1 An exploded schematic diagram of the heating element shown;

[0033] Figure 3 is a cross-sectional schematic diagram of a heating element provided in another embodiment of the present application;

[0034] Figure 4 yes Figure 3 Exploded schematic diagram of the heating element shown. DETAILED DESCRIPTION

[0035] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, the present application is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0036] An embodiment of the present application provides a heating element, wherein, Figures 1 to 4As shown, it includes a substrate 11, a heating layer 12 and an insulating layer 13. The heating layer 12 is arranged on the substrate 11, and the insulating layer 13 covers the heating layer 12. The material of the side of the insulating layer 13 close to the heating layer 12 includes at least glass glaze, and the material of the side of the insulating layer 13 away from the heating layer 12 includes at least wear-resistant material.

[0037] In the embodiment of the present application, the insulating layer 13 is not only composed of glass glaze and wear-resistant material, but the material on the side of the insulating layer 13 close to the heating layer 12 at least includes glass glaze, thereby ensuring the adhesion between the insulating layer 13 and the heating layer 12; and the material on the side of the insulating layer 13 away from the heating layer 12 at least includes wear-resistant material. The presence of wear-resistant material can enhance the overall wear resistance of the insulating layer 13 and delay the falling of the glass glaze from the heating layer 12, thereby improving the technical problem that the glass glaze layer 131 in the heating element of the existing heating without combustion device is easy to peel off, affecting the service life of the heating body.

[0038] Optionally, in one embodiment, Figures 1-2 As shown, the material of the insulating layer 13 on the side close to the heating layer 12 is the same as the material of the insulating layer 13 on the side away from the heating layer 12. The material of the insulating layer 13 includes glass glaze and wear-resistant material. The wear-resistant material is dispersed in the glass glaze to form the above-mentioned insulating layer 13, and the wear-resistant material is insulating material.

[0039] In this embodiment, the wear resistance of the glass glaze is enhanced by dispersing the wear-resistant material in the glass glaze, so that the material on the side of the insulating layer 13 close to the heating layer 12 is the same as the material on the side of the insulating layer 13 away from the heating layer 12. Because the glass glaze is in direct contact with the heating layer 12, the above-mentioned wear-resistant material is limited to an insulating material, which can not only better ensure the overall insulation effect and improve its wear resistance, but also the heating element still has the advantages of anti-oxidation, anti-radiation, good thermal stability, corrosion resistance and long service life. In addition, using glass glaze as the bonding phase of the wear-resistant layer 132 can reduce the sintering temperature of the wear-resistant material and prevent diamond or other carbides from oxidizing during the sintering process.

[0040] Optionally, in this embodiment, the wear-resistant material includes at least one of diamond, silicon carbide, boron carbide, zirconium oxide, aluminum oxide, silicon nitride, and boron nitride.

[0041] Optionally, in this embodiment, the mass percentage of the glass glaze in the insulating layer 13 is 30-90%, and the mass percentage of the wear-resistant material is 10-70%, which can effectively take into account the insulation effect, wear resistance and bonding effect.

[0042] Optionally, in a specific embodiment, the thickness of the above-mentioned insulating layer 13 is 0.01 to 0.3 mm, but is not limited to the above-mentioned thickness range. For example, the overall thickness of the above-mentioned insulating layer 13 can be 0.01 mm, 0.02 mm, 0.05 mm, 0.1 mm, 0.05 mm, 0.2 mm, 0.25 mm, 0.3 mm or any two of the above ranges.

[0043] Alternatively, in another embodiment, Figures 3-4 As shown, the above-mentioned insulating layer 13 includes a glass glaze layer 131 and a wear-resistant layer 132; the glass glaze layer 131 is arranged to cover the heating layer 12, and the material of the glass glaze layer 131 includes glass glaze; the wear-resistant layer 132 covers the glass glaze layer 131, and the material of the durable layer includes the wear-resistant material.

[0044] In this embodiment, the wear resistance of the heating element can be improved by further adding a wear-resistant layer 132 made of wear-resistant material on the surface of the glass glaze layer 131 without changing the chemical composition of the glass glaze layer 131 .

[0045] Among them, because the existence of the glass glaze layer 131 can isolate it from the heating layer 12 to achieve an insulation effect, the wear-resistant material in the wear-resistant layer 132 can be a conductive material or an insulating material.

[0046] Optionally, in this embodiment, the wear-resistant material includes at least one of diamond, silicon carbide, boron carbide, zirconium oxide, aluminum oxide, silicon nitride, boron nitride, tungsten carbide, tantalum carbide, and chromium carbide.

[0047] Optionally, in this embodiment, the wear-resistant material can be deposited on the surface of the glass glaze layer 131 using low-temperature chemical vapor deposition or physical vapor deposition to form the wear-resistant layer 132, thereby improving the wear resistance of the product and extending its service life.

[0048] Optionally, in a specific embodiment, the wear-resistant layer 132 may be deposited and covered only on the tip of the heating element and other easily worn areas, which can effectively improve the wear resistance of the product and extend its service life.

[0049] Optionally, in a specific embodiment, the thickness of the glass glaze layer 131 is 0.01-0.3 mm, which can effectively achieve insulation and bonding effects. For example, the thickness of the glass glaze layer 131 can be 0.01 mm, 0.02 mm, 0.05 mm, 0.1 mm, 0.05 mm, 0.2 mm, 0.25 mm, 0.3 mm, or any two of the above ranges.

[0050] Optionally, in a specific embodiment, the thickness of the wear-resistant layer 132 is 0.01-0.3 mm, which can effectively achieve wear resistance and bonding effects. For example, the thickness of the wear-resistant layer 132 can be 0.01 mm, 0.02 mm, 0.05 mm, 0.1 mm, 0.05 mm, 0.2 mm, 0.25 mm, 0.3 mm, or any range of two of the above.

[0051] In practical applications, the thickness of the glass glaze layer 131 and the thickness of the wear-resistant layer 132 can be 0.01 to 0.3 mm respectively or simultaneously, but are not limited to the above thickness range. Optionally, in a specific embodiment, the thickness of the glass glaze layer 131 and the thickness of the wear-resistant layer 132 are both 0.01 to 0.3 mm, which can effectively take into account the production cost and the wear resistance and bonding effect.

[0052] In the heating element provided in the embodiment of the present application, the melting point of the glass powder is lower than the melting point of the heating layer 12, and the melting point of the glass powder is higher than the working temperature of the heating element. The melting point of the glass powder is lower than the melting point of the heating layer 12, so that the heating layer 12 is first formed by high-temperature sintering, and then the insulating layer 13 is formed by sintering, so as to avoid melting the heating layer 12 during the sintering process of forming the insulating layer 13; and the melting point of the glass powder is set higher than the working temperature of the heating element, so as to avoid melting of the glass glaze during normal operation.

[0053] Optionally, in one embodiment, the melting point of the glass powder is 450-800°C, and optionally, the melting point of the glass powder is 500-700°C; the working temperature of the non-combustion device is 200-300°C.

[0054] The present application also provides a method for preparing a heating element, including steps 201 to 203:

[0055] Step 201, printing a resistor paste on a substrate, and sintering to form a heating layer;

[0056] Step 202: forming an insulating layer on the heating layer to obtain a heating element, wherein the material of the insulating layer on a side close to the heating layer includes at least glass glaze, and the material of the insulating layer on a side away from the heating layer includes at least wear-resistant material.

[0057] In an embodiment of the present application, a resistor paste is first printed on a substrate and sintered at high temperature to form a heating layer, and then an insulating layer is formed on the heating layer by sintering or the like, and the material on the side of the insulating layer close to the heating layer includes at least glass glaze, and the material on the side of the insulating layer away from the heating layer includes at least wear-resistant material. The presence of the wear-resistant material can enhance the overall wear resistance of the insulating layer and delay the falling of the glass glaze from the heating layer, thereby improving the technical problem that the glass glaze layer in the heating element of the existing heating without combustion device is easily peeled off, affecting the service life of the heating body.

[0058] Optionally, in the above step 201, the prepared resistor paste is printed on the substrate by screen printing, and then the printed substrate is sintered in a vacuum furnace, and the sintering curve is: the room temperature is raised to 100-150°C, kept warm for 0.5-2h, then raised to 1200-1400°C, kept warm for 0.5-2h, and then cooled to room temperature with the furnace.

[0059] Optionally, the resistor paste may specifically be silver paste, platinum paste, etc.

[0060] Optionally, in one embodiment, the step of forming an insulating layer on the heating layer comprises steps 221 to 222:

[0061] Step 221, mixing glass powder, wear-resistant material, solvent, dispersant, and thickener to form wear-resistant glaze, wherein the wear-resistant material is an insulating material;

[0062] Step 222: coating the wear-resistant glaze on the heating layer, and sintering at a first temperature to form the insulating layer; wherein the first temperature is lower than the sintering temperature for sintering to form the heating layer.

[0063] In this embodiment, the wear resistance of the glass glaze is enhanced by dispersing the wear-resistant material in the glass glaze. Since the glass glaze is in direct contact with the heating layer, the wear-resistant material is limited to an insulating material. This not only ensures a better overall insulation effect and improves its wear resistance, but the heating element still has the advantages of anti-oxidation, anti-radiation, good thermal stability, corrosion resistance and long service life. In addition, using glass glaze as a bonding phase for the wear-resistant layer can reduce the sintering temperature of the wear-resistant material and prevent oxidation of diamond or other carbides during the sintering process.

[0064] In the above step 221, glass powder, wear-resistant material, dispersant and thickener are added to the solvent and then mixed evenly by ball milling or the like to obtain the wear-resistant glaze.

[0065] In step 221, the glass powder is used as the bonding phase of the wear-resistant layer, and it needs to be a low-melting-point glass powder, and its melting point can be specifically 450-800°C, which is lower than the melting point of the heating layer and higher than the working temperature of the heating element. The melting point of the glass powder is lower than the melting point of the heating layer, so that the heating layer is first formed by high-temperature sintering, and then the insulating layer is formed by sintering, so as to avoid melting the heating layer during the sintering process of forming the insulating layer; and the melting point of the glass powder is set higher than the working temperature of the heating element to avoid melting of the glass glaze during normal operation.

[0066] Among them, the above-mentioned solvent includes at least one of pineol, ethanol, methyl ethyl ketone, acetone, and butanone; the dispersant includes at least one of triolein, polyvinyl butyral, triethanolamine, castor oil, and polysorbate 80; the thickener includes at least one of ethyl cellulose, polyacrylic acid, and polyethylene glycol; and the above-mentioned wear-resistant material includes at least one of diamond, silicon carbide, boron carbide, zirconium oxide, aluminum oxide, silicon nitride, and boron nitride.

[0067] Optionally, after mixing glass powder and wear-resistant material in a mass ratio of 30-90:10-70, the mixture, solvent, dispersant and thickener are mixed in a mass ratio of 34-69.7:30-60:0.2-4:0.1-2 to obtain the wear-resistant glaze.

[0068] In the above step 222, the prepared wear-resistant glaze is evenly coated on the heating layer, the substrate is sintered in an air atmosphere at a first temperature lower than the sintering temperature for forming the heating layer, and then cooled to room temperature with the furnace to obtain a heating substrate, the insulating layer is ground open, the heating layer and the wire are welded together to obtain a heating element.

[0069] Optionally, in one embodiment, the step of forming an insulating layer on the heating layer includes steps 223 to 225:

[0070] Step 223: Mix the glass powder, solvent, dispersant, and thickener to obtain a glass glaze.

[0071] In step 223, glass powder, dispersant and thickener are added to the solvent and then mixed evenly by ball milling or the like to form glass glaze.

[0072] In step 223, the glass powder is a low-melting-point glass powder, and its melting point can be specifically 450-800°C, which is lower than the melting point of the heating layer and higher than the working temperature of the heating element. The melting point of the glass powder is lower than the melting point of the heating layer, so that the heating layer is first formed by high-temperature sintering, and then the insulating layer is formed by sintering, so as to avoid melting the heating layer during the sintering process of forming the insulating layer; and the melting point of the glass powder is set higher than the working temperature of the heating element to avoid melting of the glass glaze during normal operation.

[0073] The solvent includes at least one of pineol, ethanol, methyl ethyl ketone, acetone and butanone; the dispersant includes at least one of triolein, polyvinyl butyral, triethanolamine, castor oil and polysorbate 80; and the thickener includes at least one of ethyl cellulose, polyacrylic acid and polyethylene glycol.

[0074] Optionally, the glass powder, solvent, dispersant and thickener are mixed in a mass ratio of 34-69.7:30-60:0.2-4:0.1-2 to form a glass glaze.

[0075] Step 224, coating the glass glaze on the heating layer, and sintering at a second temperature to form the glass glaze layer; wherein the second temperature is lower than the sintering temperature for forming the heating layer.

[0076] In step 224, the prepared glass glaze is evenly coated on the heating layer, and the substrate is sintered in an air atmosphere at a second temperature lower than the sintering temperature for forming the heating layer, and then cooled to room temperature in the furnace to obtain a heating substrate, and the glass glaze layer is ground to open, and the heating layer and the wire are welded together to obtain a heating element.

[0077] Step 225 , depositing a wear-resistant material on the glass glaze layer by vapor deposition to form the wear-resistant layer.

[0078] In step 225, the wear-resistant material is deposited on the surface of the glass glaze layer by low-temperature chemical vapor deposition or physical vapor deposition to form the above-mentioned wear-resistant layer, thereby improving the wear resistance of the product and extending the service life.

[0079] Among them, because the existence of the glass glaze layer can isolate it from the heating layer to achieve an insulating effect, the wear-resistant material in the above-mentioned wear-resistant layer can be a conductive material or an insulating material.

[0080] Optionally, in this embodiment, the wear-resistant material includes at least one of diamond, silicon carbide, boron carbide, zirconium oxide, aluminum oxide, silicon nitride, boron nitride, tungsten carbide, tantalum carbide, and chromium carbide.

[0081] In this embodiment, the wear resistance of the heating element can be improved by further adding a wear-resistant coating composed of wear-resistant material on the surface of the glass glaze layer without changing the chemical composition of the glass glaze layer.

[0082] The present invention also proposes a heat-without-combustion device, which includes the above-mentioned heating element, and the heating element serves as a heat source for the heat-without-combustion device.

[0083] In practical applications, the heat-not-burn device may specifically be a smoking device such as an electronic cigarette.

[0084] For the above-mentioned heating without burning device embodiment, it includes the above-mentioned heating element and can achieve the same technical effect. In order to avoid repetition, it will not be described here. For relevant matters, please refer to the partial description of the heating element embodiment.

[0085] In order to make the invention purpose, technical scheme and beneficial effect of the present invention clearer, the present invention is further described below in conjunction with embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention.

[0086] Example 1

[0087] (1) Preparation of heating layer:

[0088] The prepared platinum paste is printed on the substrate by screen printing, and then the printed substrate is sintered in a vacuum furnace to form a heating layer. The sintering curve is: the room temperature is raised to 120°C, kept warm for 1 hour, then raised to 1300°C, kept warm for 1 hour, and then cooled to room temperature with the furnace.

[0089] (2) Preparation of glass glaze:

[0090] Glass powder, solvent, dispersant and thickener are placed in a ball mill in a mass ratio of 50:47:2:1 and evenly mixed to form a glass glaze, wherein the solvent is pineol, the dispersant is triolein, and the thickener is ethyl cellulose.

[0091] (3) Preparation of glass glaze layer:

[0092] The prepared glass glaze is evenly coated on the heating layer, and the substrate is sintered in an air atmosphere. The sintering curve is as follows: the room temperature is raised to 120°C, kept warm for 1 hour, then raised to 600°C, kept warm for 1 hour, and then cooled to room temperature with the furnace to obtain a heating substrate with a glass glaze layer with a thickness of 0.05 mm. The glass glaze layer is ground open to weld the heating layer to the wire.

[0093] (4) Wear-resistant layer preparation:

[0094] The wear-resistant material silicon nitride is deposited on the surface of the glass glaze layer by low-temperature chemical vapor deposition to form a wear-resistant layer with a thickness of 0.05 mm, thereby obtaining a heating element.

[0095] Example 2

[0096] (1) Preparation of heating layer:

[0097] The prepared platinum paste is printed on the substrate by screen printing, and then the printed substrate is sintered in a vacuum furnace to form a heating layer. The sintering curve is: the room temperature is raised to 120°C, kept warm for 1 hour, then raised to 1300°C, kept warm for 1 hour, and then cooled to room temperature with the furnace.

[0098] (2) Preparation of wear-resistant glaze:

[0099] Glass powder, wear-resistant material, solvent, dispersant and thickener are placed in a ball mill in a mass ratio of 30:20:47:2:1 and evenly mixed to form a wear-resistant glaze, wherein the wear-resistant material is silicon nitride, the solvent is pineol, the dispersant is triolein, and the thickener is ethyl cellulose.

[0100] (3) Preparation of insulating layer:

[0101] The prepared wear-resistant glaze is evenly coated on the heating layer, and the substrate is sintered in an air atmosphere. The sintering curve is as follows: the room temperature is raised to 120°C, kept warm for 1 hour, then raised to 600°C, kept warm for 1 hour, and then cooled to room temperature with the furnace to obtain a heating substrate with an insulating layer with a thickness of 0.1 mm. The insulating layer is ground open, and the heating layer is welded to the wire to obtain a heating element.

[0102] Example 3

[0103] The difference between Example 3 and Example 2 is that in step (2), the mass ratio of glass powder to wear-resistant material is adjusted to 15:35.

[0104] Example 4

[0105] The difference between Example 4 and Example 2 is that in step (2), the mass ratio of glass powder to wear-resistant material is adjusted to 45:5.

[0106] Example 5

[0107] The difference between Example 5 and Example 2 is that in step (2), the wear-resistant material is adjusted to zirconium oxide.

[0108] Comparative Example 1

[0109] (1) Preparation of heating layer:

[0110] The prepared platinum paste is printed on the substrate by screen printing, and then the printed substrate is sintered in a vacuum furnace to form a heating layer. The sintering curve is: the room temperature rises to 100-150°C, kept warm for 0.5-2h, then heated to 1200-1400°C, kept warm for 0.5-2h, and then cooled to room temperature with the furnace.

[0111] (2) Preparation of glass glaze:

[0112] Glass powder, solvent, dispersant and thickener are placed in a ball mill in a mass ratio of 50:47:2:1 and evenly mixed to form a glass glaze, wherein the solvent is pineol, the dispersant is triolein, and the thickener is ethyl cellulose.

[0113] (3) Preparation of glass glaze layer:

[0114] The prepared glass glaze is evenly coated on the heating layer, and the substrate is sintered in an air atmosphere. The sintering curve is as follows: the room temperature is raised to 100-150°C, kept warm for 0.5-2h, then raised to 1200-1400°C, kept warm for 0.5-2h, and then cooled to room temperature with the furnace to obtain a heating substrate with a glass glaze layer with a thickness of 0.1mm. The glass glaze layer is ground to open, and the heating layer is welded to the wire to obtain a heating element.

[0115] The heating elements prepared in the above embodiments and comparative examples are successively fixed on the sensing probe of the handheld push-pull dynamometer with hot melt glue, and then the exposed glaze surface is pressed against the polishing machine on all sides, and the push-pull dynamometer is held tightly and pressed down to keep the downward pressure at 10±2N, and the polishing machine is turned on. At a speed of 500rpm, the edge of the polishing machine grinding disc is fixed at a fixed position and polished for 3 minutes. Then the heating element sample is removed, weighed and the weight loss due to wear is calculated, the degree of wear of the glaze layer is observed with the naked eye, and the resistance change of the product is tested; then the element is installed to test the smoke condition, and a trial inhalation is performed to compare the changes in taste before and after wear.

[0116] The results showed that the glaze layer wear of Examples 1 to 5 was less than 0.5%, and the heating layer circuit did not change, the test resistance did not change, the machine could smoke normally, and the taste was basically the same; while the surface glass glaze layer of Comparative Example 1 was completely worn, the heating layer circuit was also worn thin, the test resistance became larger, and the machine could not smoke normally.

[0117] In summary, in this embodiment, the heating element provided includes a substrate, a heating layer and an insulating layer, the heating layer is arranged on the substrate, the insulating layer covers the heating layer, the material of the side of the insulating layer close to the heating layer includes at least glass glaze, and the material of the side of the insulating layer away from the heating layer includes at least wear-resistant material. Among them, the presence of the wear-resistant material can enhance the overall wear resistance of the insulating layer, delay the glass glaze from falling off the heating layer, thereby improving the technical problem that the glass glaze layer in the existing heating element is easy to peel off, affecting the service life of the heating element.

[0118] Although the preferred embodiments of the present application have been described, those skilled in the art may make additional changes and modifications to these embodiments once they are aware of the basic creative concepts. Therefore, the claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the embodiments of the present application.

[0119] The above is a detailed introduction to a heating element and a preparation method thereof, and a heating without burning device provided by the present application. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea; at the same time, for general technicians in this field, according to the ideas of the present application, there will be changes in the specific implementation methods and application scopes. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A heating element, characterized in that: It includes a substrate, a heating layer and an insulating layer, the heating layer is arranged on the substrate, the insulating layer covers the heating layer, the material of the insulating layer close to the heating layer includes at least glass glaze, and the material of the insulating layer away from the heating layer includes at least wear-resistant material.

2. The heating element according to claim 1, characterized in that The material of the insulating layer on the side close to the heating layer is the same as the material of the insulating layer on the side away from the heating layer. The material of the insulating layer includes glass glaze and wear-resistant material. The wear-resistant material is dispersed in the glass glaze, and the wear-resistant material is an insulating material.

3. The heating element according to claim 2, characterized in that The wear-resistant material includes at least one of diamond, silicon carbide, boron carbide, zirconium oxide, aluminum oxide, silicon nitride and boron nitride.

4. The heating element according to claim 2, characterized in that The thickness of the insulating layer is 0.01-0.3 mm.

5. The heating element according to claim 2, characterized in that The mass percentage of the glass glaze in the insulating layer is 30 to 90%, and the mass percentage of the wear-resistant material is 10 to 70%.

6. The heating element according to claim 1, characterized in that The insulating layer includes a glass glaze layer and a wear-resistant layer; the glass glaze layer is arranged to cover the heating layer, and the material of the glass glaze layer includes the glass glaze; the wear-resistant layer covers the glass glaze layer, and the material of the durable layer includes the wear-resistant material.

7. The heating element according to claim 6, characterized in that The wear-resistant material includes at least one of diamond, silicon carbide, boron carbide, zirconium oxide, aluminum oxide, silicon nitride, boron nitride, tungsten carbide, tantalum carbide, and chromium carbide.

8. The heating element according to claim 6, characterized in that The thickness of the glass glaze layer is 0.01-0.3 mm; and / or the thickness of the wear-resistant layer is 0.01-0.3 mm.

9. The heating element according to claim 1, characterized in that The melting point of the glass frit is lower than the melting point of the heat generating layer, and the melting point of the glass frit is higher than the working temperature of the heating element.

10. The heating element according to claim 1, characterized in that The melting point of the glass powder is 450-800°C.

11. A method for preparing a heating element, characterized in that: include: Printing resistor paste on the substrate and sintering to form a heating layer; An insulating layer is formed on the heating layer to obtain a heating element, wherein the material of the insulating layer on a side close to the heating layer at least includes glass glaze, and the material of the insulating layer on a side away from the heating layer at least includes wear-resistant material.

12. The preparation method according to claim 11, characterized in that: An insulating layer is formed on the heating layer, comprising: Mixing glass powder, wear-resistant material, solvent, dispersant and thickener to form wear-resistant glaze, wherein the wear-resistant material is insulating material; The wear-resistant glaze is coated on the heating layer and sintered at a first temperature to form the insulating layer; wherein the first temperature is lower than the sintering temperature for sintering to form the heating layer.

13. The preparation method according to claim 11, forming an insulating layer on the heat generating layer, comprising: Mixing glass powder, solvent, dispersant and thickener to form glass glaze; Applying the glass glaze on the heating layer and sintering at a second temperature to form the glass glaze layer; wherein the second temperature is lower than the sintering temperature for forming the heating layer; The wear-resistant layer is formed by depositing a wear-resistant material on the glass glaze layer by vapor deposition.

14. A heat-not-burn device, characterized in that: The heating element comprises the heating element as claimed in any one of claims 1 to 10.

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