CN115299653A - Multilayer induction heating body and preparation method and application thereof - Google Patents
Multilayer induction heating body and preparation method and application thereof Download PDFInfo
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- CN115299653A CN115299653A CN202211000959.6A CN202211000959A CN115299653A CN 115299653 A CN115299653 A CN 115299653A CN 202211000959 A CN202211000959 A CN 202211000959A CN 115299653 A CN115299653 A CN 115299653A
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- A—HUMAN NECESSITIES
- A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
- A24F—SMOKERS' REQUISITES; MATCH BOXES; SIMULATED SMOKING DEVICES
- A24F40/00—Electrically operated smoking devices; Component parts thereof; Manufacture thereof; Maintenance or testing thereof; Charging means specially adapted therefor
- A24F40/40—Constructional details, e.g. connection of cartridges and battery parts
- A24F40/46—Shape or structure of electric heating means
- A24F40/465—Shape or structure of electric heating means specially adapted for induction heating
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- A—HUMAN NECESSITIES
- A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
- A24F—SMOKERS' REQUISITES; MATCH BOXES; SIMULATED SMOKING DEVICES
- A24F40/00—Electrically operated smoking devices; Component parts thereof; Manufacture thereof; Maintenance or testing thereof; Charging means specially adapted therefor
- A24F40/40—Constructional details, e.g. connection of cartridges and battery parts
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- A—HUMAN NECESSITIES
- A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
- A24F—SMOKERS' REQUISITES; MATCH BOXES; SIMULATED SMOKING DEVICES
- A24F40/00—Electrically operated smoking devices; Component parts thereof; Manufacture thereof; Maintenance or testing thereof; Charging means specially adapted therefor
- A24F40/70—Manufacture
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/02—Compacting only
- B22F3/04—Compacting only by applying fluid pressure, e.g. by cold isostatic pressing [CIP]
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/10—Sintering only
- B22F3/1003—Use of special medium during sintering, e.g. sintering aid
- B22F3/1007—Atmosphere
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F7/00—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression
- B22F7/02—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite layers
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- General Induction Heating (AREA)
Abstract
The invention belongs to the technical field of induction heating materials, and particularly relates to a multilayer induction heating body and a preparation method and application thereof. The multilayer induction heating body provided by the invention comprises at least three layers of structures, so that the multilayer induction heating body has the functions of heating and temperature control at the same time, the heating process is uniform and stable, and the conditions of cracking, deformation and the like can not occur. By arranging the transition layer between the first susceptor material layer and the second susceptor material layer, the thermal stability of the multilayer induction heating body is remarkably improved, so that the stability and consistency of the induction heating sheet in the heating process can be ensured. The transition layer is added between the first receptor and the second receptor, so that the problem of mechanical, physical and chemical incompatibility of the two receptor materials can be effectively solved, and the temperature control characteristics of the two receptors are conveniently and fully utilized. In addition, the transition layer can also avoid the mutual influence of the first susceptor material layer and the second susceptor material layer in the heating process, and realize accurate heating and temperature control.
Description
Technical Field
The invention belongs to the technical field of induction heating materials, and particularly relates to a multilayer induction heating body and a preparation method and application thereof.
Background
The iron-based alloy has high magnetic conductivity and high electromagnetic induction heating rate. Thus, wireless temperature-controlled susceptors for inductively heating aerosol-forming substrates typically employ iron or iron-based alloys, most typically stainless steel strips.
The susceptor prepared by adopting a single material stainless steel has the defect of low temperature control precision, namely: the temperature control range is usually much lower than the curie temperature point of stainless steel material, and a small change of heating current in the temperature control range corresponds to a large change of the temperature of the susceptor, which results in low temperature control precision and even inaccurate temperature control. In addition, because the curie temperature point of the iron-based alloy is very high, when the single-layer stainless steel strip is used as a susceptor, the iron-based alloy can only perform the function of heating to form aerosol, and cannot perform the maximum temperature limitation through the characteristics of the material, the curie temperature of the typical 430L stainless steel is above 700 ℃, and the maximum temperature of the aerosol generated based on the national standard is lower than 350 ℃, so a temperature threshold control program needs to be added into a microcontroller, and the structure of the induction heating device is complicated.
Disclosure of Invention
Therefore, the invention aims to solve the technical problems of low temperature control precision of a single-material receptor in the prior art and solve the problems of high Curie temperature, heating effect only in a required controllable temperature range and no self-temperature limiting effect of the conventional single-material heating element, thereby providing the multilayer induction heating body and the preparation method and application thereof.
Therefore, the invention provides the following technical scheme:
the present invention provides a multilayer induction-heatable body comprising first and second susceptor material layers, and a transition layer disposed between the first and second susceptor material layers.
Optionally, the first susceptor material layer has a thickness of 20-150 microns;
and/or the thickness of the second susceptor material layer is 20-150 μm;
and/or the transition layer has a thickness of 5-50 microns.
Optionally, the first susceptor material, the transition layer, and the second susceptor material layer are formed by sintering.
Optionally, a protective layer is provided on the outside of the first susceptor material layer and/or the second susceptor material layer.
Optionally, the thickness of the protective layer is 1-10 microns.
Optionally, the multilayer induction heating body is a sheet type, a tube type, a cup type or a pot type.
Optionally, the material of the transition layer is a simple metal, an alloy, a ceramic, or any combination thereof.
Optionally, the first susceptor material is at least one of nickel and nickel-chromium alloy;
and/or the second susceptor material is at least one of iron, a ferro-chrome alloy.
The invention also provides a preparation method of the multilayer induction heating body, which comprises the following steps:
s1, preparing biscuit of each layer by a tape casting method according to the composition of raw materials of each layer;
s2, sequentially laminating the biscuit of each layer, and performing hot isostatic pressing treatment to obtain a to-be-sintered biscuit;
and S3, removing the glue from the blank to be sintered, and sintering.
Optionally, the temperature of the warm isostatic pressing treatment is 65-85 ℃, the time is 0.1-1h, and the pressure is 5-45MPa.
Optionally, the temperature of the glue discharging treatment is 250-550 ℃, and the time is 1-10h;
and/or the sintering temperature is 1100-1400 ℃, and the time is 0.5-15h.
Further, the multilayer induction heating body can be a sheet type, and can also be a tube type, a cup type or a pot type which is processed by the sheet type.
The invention also provides an application of the multilayer induction heating body or the multilayer induction heating body prepared by the preparation method in the field of magnetic induction heating.
Typically, and without limitation, the present invention provides a multilayer induction-heatable body having first and second susceptor materials with different curie-temperature points, wherein at least one of the materials has a curie-temperature point below 400 ℃. Optionally, the first susceptor material has a curie temperature of between 200-400 ℃; preferably above 380 ℃. The second susceptor material has a curie temperature of between 400 and 1000 c.
For example, the first susceptor material may be selected from elemental nickel, nickel-chromium alloy, surface treated nickel-chromium alloy, and the like, and the curie temperature point of nickel is about 350 ℃. For example, the second susceptor material may be selected from iron or an iron-based alloy, such as ferritic stainless steel, which typically has a Curie point of about 700 ℃ as described in ferritic stainless steels 430L, 430L.
Arranging a transition layer between the first susceptor and the second susceptor, wherein the material of the transition layer is a simple metal, an alloy, a ceramic or any combination of the simple metal, the alloy and the ceramic;
in the multilayer induction heating body provided by the invention, the transition layer between the first susceptor material layer and the second susceptor material layer is preferably a simple metal, an alloy or a composite metal with high thermal conductivity and high electric conductivity.
The transition layer material may be selected from a weakly magnetic or non-magnetic metal, such as austenitic stainless steel 316L.
The material of the transition layer can also be selected from magnetic metal materials. For example, when the first susceptor material is nickel and the second susceptor material is 430 liters, the transition layer may be iron chromium aluminum. The surface of the iron chromium aluminum is provided with a layer of natural aluminum oxide protective film which has good high-temperature chemical compatibility with most metals and is very suitable for being used as a transition layer material.
The transition layer material can also be ceramic, and the ceramic is an ideal transition layer material in consideration of good high-temperature compatibility of the ceramic and the metal.
Optionally, a protective layer may be applied to one or both sides of the multilayer susceptor, which may be metal, ceramic, glass or any combination thereof, in order to improve oxidation and corrosion resistance of the multilayer susceptor.
The multilayer induction heating body provided by the invention can provide a characteristic temperature point, the temperature of the heating body can be controlled to be close to the specific temperature through electric control, the characteristic temperature can be regulated and controlled according to material components, and the typical temperature can be regulated and controlled between 150-400 ℃.
According to the matching of components and electric control, the heating can be realized in two temperature sections of 150-260 ℃ and 250-400 ℃. And, according to the one-to-one correspondence current-temperature relation, wireless temperature control can be realized.
The multilayer induction heating body provided by the invention is suitable for induction heating aerosol for electronic cigarettes to form a receptor heating material, medical atomization aerosol to form a receptor heating material, a beauty instrument and other scenes needing induction heating and temperature control.
The invention provides a multilayer induction heating body temperature control logic:
the multilayer induction heating body is heated in the initial heating stage, and the electric control detects an initial current; along with the temperature rise of the heating body, the magnetic resistance of the heating body can be increased, and the corresponding electric control can detect that the current is reduced; when the temperature of the heating body continues to rise and rises to the Curie temperature point close to the low Curie temperature material in the multilayer induction heating body, the low Curie temperature material begins to lose magnetism gradually, the total magnetic resistance of the heating body is reduced, the apparent current is gradually increased when the electronic control detects that the apparent current is gradually increased, and a minimum current inflection point (I) can appear at the moment 1 ) In the next heating process, the electric control detected current and the temperature of the heating body have one-to-one correspondence relationship; through the one-to-one correspondence, a standard curve can be established, so that wireless temperature control can be realized; with temperatureFurther increase of (a) will result in a further maximum current inflection point (I) when the low Curie point susceptor material is completely demagnetized 2 ) And occurs. As the current continues to rise, electromagnetic induction heating dominates the high curie temperature point material, and as the heating temperature continues to rise, the current will become smaller as the magnetic resistance of the high curie temperature point material increases. The multilayer induction heating body provided by the invention can realize the characteristic current value I by regulating and controlling the metal phase components of the high Curie temperature point and the low Curie temperature point 1 Characteristic temperature value T 1 Temperature control standard curve and maximum threshold temperature T 2 Is adjustable.
The temperature control logic in the prior art is divided into two categories:
a susceptor being a conventional two-layer physical-bonded structure, the susceptor consisting of a first susceptor material and a second susceptor material, the susceptor assembly having an electrical resistance-temperature curve (fig. 6, refer to chinese patent document CN112739229 a) with a minimum electrical resistance value in a temperature range of ± 5 ℃ around the curie temperature of the second susceptor material during preheating of the susceptor assembly from room temperature. The temperature of a certain point is calibrated through the minimum resistance value so as to achieve the aim of temperature control. Also in this susceptor, the first susceptor material is used for the main heating and the second susceptor material is used as a temperature marker, at its curie temperature, the magnetic properties of the second susceptor change from ferromagnetic or ferrimagnetic to paramagnetic, accompanied by a temporary change in its electrical resistance. By monitoring the corresponding change in current drawn by the induction source, it is possible to detect when the second susceptor material has reached its curie temperature and thus know when a predetermined operating temperature has been reached. The temperature control logic can only calibrate the Curie temperature point of the second receptor material, is limited by materials, has single temperature point and cannot perform interval temperature control.
Another is to use a single stainless steel sheet for the susceptor, which material has a strictly monotonic relationship between the temperature of the susceptor and the apparent ohmic resistance determined by the DC supply voltage through the DC power supply and by the DC current drawn from the DC power supply during heating in the induction heating device. Since each single value of apparent ohmic resistance represents a unique temperature, this strict monotonic relationship can be used to determine the corresponding temperature of the susceptor by the magnitude of the apparent ohmic resistance without contacting the induction heating unit. The requirement on the variation of the corresponding relationship between the apparent ohmic resistance and the temperature of the stainless steel sheet in the temperature control logic is high, and the variation of the apparent ohmic resistance is usually too small at a certain time in a temperature interval in the corresponding relationship of the conventional stainless steel sheet, so that the temperature can not be accurately controlled.
The technical scheme of the invention has the following advantages:
the multilayer induction heating body provided by the invention comprises at least three layers of structures including the first susceptor material layer, the second susceptor material layer and the transition layer, so that the multilayer induction heating body has the functions of heating and temperature control at the same time, the temperature control precision is high, the heating process is uniform and stable, and the conditions of cracking, deformation and the like can not occur. By arranging the transition layer between the first susceptor material layer and the second susceptor material layer, the thermal stability of the multilayer induction heating body is remarkably improved, so that the stability and consistency of the induction heating sheet in the heating process can be ensured. The invention provides a novel method for preparing a multilayer induction sheet based on a powder sintering mode, wherein a transition layer is added between a first receptor and a second receptor, so that the problem of mechanical, physical and chemical incompatibility of materials of the two receptors can be effectively solved, and the temperature control characteristics of the two receptors can be fully utilized. In addition, the transition layer can also avoid the mutual influence of the first susceptor material layer and the second susceptor material layer in the heating process, and realize accurate heating and temperature control.
The multilayer induction heating body provided by the invention has the advantages that the transition layer is very thin and only has the thickness of 5-50 micrometers, and the arrangement has the effect of accelerating the direct heat exchange of the first susceptor and the second susceptor and is beneficial to the first susceptor and the second susceptor to directly and quickly reach the heat balance. Combining the first susceptor with the second susceptor as a whole allows the whole to reach thermal equilibrium rapidly during heating, which is advantageous for accurate temperature control.
The multilayer induction heating body provided by the invention can avoid the influence of the transition layer on the induction heating characteristics of the first susceptor material layer and the second susceptor material layer by limiting the thickness of each layer.
The multilayer induction heating body provided by the invention limits the forming mode to be a sintering mode, so that two susceptor materials can be easily combined together, and the combination range of the susceptor materials is effectively expanded; in addition, the interface bonding force between the two susceptor material layers can be improved, the problems of peeling of an interface microstructure, deformation, even cracking and the like of the heating body caused by the difference of physical properties of the two susceptor materials in a physical pressing mode in the prior art are avoided, and the consistency of the temperature control property of the heating body in the heating process is greatly kept; in addition, the multilayer heating body in the prior art is generally formed by tightly attaching the first susceptor material layer and the second susceptor material layer, if the multilayer heating body is directly formed in a sintering mode, the first susceptor material layer and the second susceptor material layer can generate mutual influence, and the performance of the heating body is finally influenced.
The multilayer induction heating body further comprises a protective layer arranged on the outer side of the first susceptor material layer and/or the outer side of the second susceptor material layer, and the high temperature resistance and the corrosion resistance of the multilayer induction heating body can be improved through the arrangement.
The preparation method of the multilayer induction heating body provided by the invention has the advantages of simple and mature preparation process, easiness in realization and great reduction of the manufacturing cost.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic view of a multilayer induction-heatable body according to the present invention;
fig. 2 is a current-temperature correspondence curve in the process of performing electromagnetic induction heating on the heating body provided in embodiment 1 of the present invention;
fig. 3 is a current-temperature correspondence curve in the process of performing electromagnetic induction heating on the heating body provided in embodiment 2 of the present invention;
fig. 4 is a current-temperature correspondence curve in the process of performing electromagnetic induction heating on the heating body provided in embodiment 3 of the present invention;
fig. 5 is a current-temperature correspondence curve in the electromagnetic induction heating process of the heating body provided in embodiment 4 of the present invention;
fig. 6 is a resistance-temperature relationship curve of a susceptor prepared by a conventional physical attachment method in the prior art in a heating process using electromagnetic induction.
Reference numerals are as follows:
1. a first susceptor material layer; 2. a transition layer; 3. a second susceptor material layer.
Detailed Description
The following examples are provided to further understand the present invention, not to limit the scope of the present invention, but to provide the best mode, not to limit the content and the protection scope of the present invention, and any product similar or similar to the present invention, which is obtained by combining the present invention with other prior art features, falls within the protection scope of the present invention.
The examples do not show the specific experimental steps or conditions, and can be performed according to the conventional experimental steps described in the literature in the field. The reagents or instruments used are not indicated by manufacturers, and are all conventional reagent products which can be obtained commercially.
Example 1
This embodiment provides a multilayer induction heating body, as shown in fig. 1, including three layers of a first susceptor material layer 1 (Ni powder)/a transition layer 2 (stainless steel 316L)/a second susceptor material layer 3 (stainless steel 430L) of a composite metal sheet layer, and the preparation method thereof includes the following specific steps:
(1) Weighing 100gNi powder, adding 3g of PVB binder and 40g of alcohol solvent, placing the ingredients into a ball milling tank for ball milling, taking out after ball milling for 3 hours to obtain slurry, and preparing a Ni biscuit by using a tape casting method and using a tape casting cutter height of 80 micrometers;
(2) Weighing 40g of 316L powder, adding 1.25g of PVB binder and 18g of alcohol solvent, putting the ingredients into a ball milling tank for ball milling, taking out after ball milling for 3 hours to obtain slurry, and preparing 316L biscuit by using a 30-micron tape casting cutter height through a tape casting method;
(3) Weighing 100g of 430L powder, adding 3g of PVB binder and 40g of alcohol solvent, putting the ingredients into a ball milling tank for ball milling, taking out after 3 hours of ball milling to obtain slurry, and preparing into 430L biscuit by using a tape casting method and using a tape casting cutter height of 80 micrometers;
(4) Sequentially laminating the obtained biscuit according to Ni biscuit, 316L biscuit and 430L biscuit, and carrying out warm isostatic pressing to obtain a composite biscuit, namely a biscuit to be sintered; wherein the hot isostatic pressing treatment is carried out at the temperature of 70 ℃, the pressure of 20MPa and the time of 10 minutes;
(5) Placing the blank to be sintered into a vacuum furnace for binder removal and sintering, wherein the heating rate is 3 ℃/min, keeping the temperature after the temperature is increased to 450 ℃, the heat preservation time is 60min, then heating to 1300 ℃ at the speed of 5 ℃/min, keeping the temperature for 30min, and cooling along with the furnace after the heat preservation is finished;
(6) And (4) after the sintered body is discharged from the furnace, cutting to obtain a required finished product.
The multilayer induction heating body provided in this example was heated by electromagnetic induction (electromagnetic heating frequency 6.78 MHz), and a monotonous and stable current-temperature correspondence existed in the heating process (as shown in fig. 2, I) 1 And I 2 Respectively, a current inflection point corresponding to a temperature T 1 And T 2 ) In the current jump phase corresponding to the interval (I) of different temperatures 1 And I 2 Corresponding T 1 And T 2 Temperature zone) can be used as a control zone for the temperature of the heating body. In addition, the heater has a characteristic of the maximum temperature to which it can be heated, as shown in FIG. 2, without further increase in current and temperature, which can provide a self-temperature protection in the susceptor assembly.
Example 2
This exampleA multilayer induction heatable body is provided, as shown in FIG. 1, comprising a first susceptor material layer 1 (Ni powder)/transition layer 2 (La powder) 0.6 Sr 0.4 Fe 0.8 Sc 0.2 O 3 ) Second susceptor material layer 3 (stainless steel 430L) three-layer composite metal sheet layer, the method of preparation comprising the specific steps of:
(1) Weighing 100gNi powder, adding 3g of PVB binder and 40g of alcohol solvent, putting the ingredients into a ball milling tank for ball milling, taking out after ball milling for 3 hours to obtain slurry, and preparing to obtain a Ni biscuit by using a tape casting method and a tape casting cutter height of 80 micrometers;
(2) Weighing 50gLa 0.6 Sr 0.4 Fe 0.8 Sc 0.2 O 3 Adding 1.5g of PVB binder and 20g of alcohol solvent into the powder, putting the ingredients into a ball milling tank for ball milling, taking out the ingredients after 3 hours of ball milling to obtain slurry, and preparing the La slurry by using a casting method and using a 50-micron casting knife height 0.6 Sr 0.4 Fe 0.8 Sc 0.2 O 3 Biscuit;
(3) Weighing 100g of 430L powder, adding 3g of PVB binder and 40g of alcohol solvent, putting the ingredients into a ball milling tank for ball milling, taking out after 3 hours of ball milling to obtain slurry, and preparing into 430L biscuit by using a tape casting method and using a tape casting cutter height of 80 micrometers;
(4) Mixing the obtained biscuit with Ni biscuit, la 0.6 Sr 0.4 Fe 0.8 Sc 0.2 O 3 Sequentially laminating the biscuit and the 430L biscuit, and then carrying out warm isostatic pressing to obtain a composite biscuit, namely a to-be-sintered biscuit; wherein the hot isostatic pressing treatment is carried out at 70 ℃ and under 20MPa for 10min;
(5) Placing the blank to be sintered into a vacuum furnace for binder removal and sintering, wherein the heating rate is 3 ℃/min, keeping the temperature after the temperature is increased to 450 ℃, the heat preservation time is 60min, then heating to 1300 ℃ at the speed of 5 ℃/min, keeping the temperature for 30min, and cooling along with the furnace after the heat preservation is finished;
(6) And (4) taking the sintered body out of the furnace, and then cutting to obtain a required finished product.
A current-temperature corresponding curve of the heating body provided in this embodiment in the process of performing electromagnetic induction heating is shown in fig. 3.
Example 3
This example provides a multilayer induction-heatable body, which differs from example 1 in that nickel alloy 1J36 powder is used instead of Ni powder.
A current-temperature corresponding curve of the heating body provided in this embodiment in the process of performing electromagnetic induction heating is shown in fig. 4.
Example 4
This example provides a multilayer induction-heatable body, which is different from example 1 in that other ferritic stainless steel 420 is used instead of stainless steel 430L.
A current-temperature corresponding curve of the heating body provided in this embodiment in the process of performing electromagnetic induction heating is shown in fig. 5.
Test example (test example of example 1)
The heating body provided by the embodiment 1 of the invention is tested, and the method specifically comprises the following steps
The first step is as follows: cutting the prepared induction metal sheet into standard sizes with the width of 8.6mm and the length of 16 mm;
the second step: attaching a thermocouple to the metal sheet with the standard size, wherein the thermocouple is used for measuring temperature;
the third step: placing the induction heating sheet attached with the thermocouple in the right center inner position of the electromagnetic induction heating coil, and fixing the heating body;
the fourth step: the voltage of the electromagnetic induction heating coil was set to 7.5V, the currents were set to 2.7a,2.8a,2.85a,2.9a and 2.95A, and the stabilized temperatures of the thermocouple in different current modes were read (heating for 60s, test final stabilized temperature), respectively.
The fifth step: and (5) repeating the steps 1-4, testing 4 heating pieces, and evaluating the consistency of the heating pieces.
The test results were as follows: for a single heating sheet, the current and the temperature of the sensing sheet have a one-to-one correspondence relationship; for different heating bodies (4 heating sheets are randomly selected to test the consistency of the heating sheets), the consistency of the heating sheets is better, the positive and negative deviations of the temperature control temperatures of different metal sheets are within 3 ℃ under different currents, and specific test results are shown in the following table (the positive and negative deviations of the temperature control temperatures of other embodiments are within 3 ℃, and the specific test results are not shown one by one):
TABLE 1
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. This need not be, nor should it be exhaustive of all embodiments. And obvious variations or modifications of the invention may be made without departing from the spirit or scope of the invention.
Claims (10)
1. A multilayer induction-heatable body comprising first and second susceptor material layers, and a transition layer disposed between the first and second susceptor material layers.
2. The multilayer induction-heatable body of claim 1, wherein the thickness of the first susceptor material layer is 20-150 microns;
and/or the thickness of the second susceptor material layer is 20-150 μm;
and/or the transition layer has a thickness of 5 to 50 microns.
3. The multi-layer induction-heatable body of any one of claims 1-2, wherein the first susceptor material, the transition layer, and the second susceptor material layer are formed by sintering.
4. The multilayer induction-heatable body of claim 3, further comprising a protective layer disposed outside the first susceptor material layer and/or the second susceptor material layer.
5. The multilayer induction-heatable body as set forth in claim 4, wherein the protective layer has a thickness of 1 to 10 μm.
6. The multilayer induction-heatable body according to claim 1, wherein the multilayer induction-heatable body is in the form of a sheet, tube, cup or pot.
7. The multilayer induction-heatable body according to claim 6, wherein the material of the transition layer is a simple metal, an alloy, a ceramic, or any combination thereof.
8. The multilayer induction-heatable body as set forth in any one of claims 1-7, wherein the first susceptor material is at least one of nickel, nickel-chromium alloy;
and/or the second susceptor material is at least one of iron, a ferro-chrome alloy.
9. A method for producing the multilayer induction-heatable body according to any one of claims 1 to 8, characterized by comprising the steps of:
s1, preparing biscuit of each layer by a tape casting method according to the composition of raw materials of each layer;
s2, sequentially laminating the biscuit of each layer, and performing hot isostatic pressing treatment to obtain a to-be-sintered blank;
and S3, carrying out glue discharging and sintering on the blank to be sintered.
10. Use of the multilayer induction-heatable body according to any one of claims 1 to 8 or the multilayer induction-heatable body produced by the production method according to claim 9 in the field of magnetic induction heating.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211000959.6A CN115299653A (en) | 2022-08-19 | 2022-08-19 | Multilayer induction heating body and preparation method and application thereof |
| PCT/CN2023/095852 WO2024037088A1 (en) | 2022-08-19 | 2023-05-23 | Multi-layer induction heating body, preparation method therefor and use thereof |
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| CN202211000959.6A CN115299653A (en) | 2022-08-19 | 2022-08-19 | Multilayer induction heating body and preparation method and application thereof |
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| WO (1) | WO2024037088A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024037088A1 (en) * | 2022-08-19 | 2024-02-22 | 深圳麦克韦尔科技有限公司 | Multi-layer induction heating body, preparation method therefor and use thereof |
| CN117774454A (en) * | 2024-02-19 | 2024-03-29 | 深圳市卓亮迪科技有限公司 | Multilayer susceptor composite material and preparation method thereof |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SG11201608759WA (en) * | 2014-05-21 | 2016-11-29 | Philip Morris Products Sa | Aerosol-generating article with multi-material susceptor |
| AR111393A1 (en) * | 2017-03-31 | 2019-07-10 | Philip Morris Products Sa | MULTI-PAPER SUSCEPTOR UNIT TO HEAT BY INDUCTION AN AEROSOL FORMER SUBSTRATE |
| AR111347A1 (en) * | 2017-03-31 | 2019-07-03 | Philip Morris Products Sa | MULTI-PAPER SUSCEPTOR UNIT TO HEAT BY INDUCTION AN AEROSOL FORMER SUBSTRATE |
| AR111392A1 (en) * | 2017-03-31 | 2019-07-10 | Philip Morris Products Sa | SUSCEPTING UNIT TO HEAT BY INDUCTION AN AEROSOL FORMER SUBSTRATE |
| EP4122339B1 (en) * | 2018-09-25 | 2024-02-28 | Philip Morris Products S.A. | Inductive heating assembly for inductive heating of an aerosol-forming substrate |
| GB201820143D0 (en) * | 2018-12-11 | 2019-01-23 | Nicoventures Trading Ltd | Aerosol generating apparatus and method of operating same |
| CN109875123B (en) * | 2019-02-27 | 2023-02-14 | 深圳市合元科技有限公司 | Electronic cigarette atomizer, electronic cigarette, atomization assembly and preparation method of atomization assembly |
| CN113974210A (en) * | 2021-09-30 | 2022-01-28 | 湖北中烟工业有限责任公司 | Heated non-burning cigarette with internal susceptor |
| CN216651319U (en) * | 2021-12-15 | 2022-06-03 | 深圳市新宜康科技股份有限公司 | Heating element, heating assembly and aerosol generating device |
| CN115299653A (en) * | 2022-08-19 | 2022-11-08 | 深圳麦克韦尔科技有限公司 | Multilayer induction heating body and preparation method and application thereof |
-
2022
- 2022-08-19 CN CN202211000959.6A patent/CN115299653A/en active Pending
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2023
- 2023-05-23 WO PCT/CN2023/095852 patent/WO2024037088A1/en unknown
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024037088A1 (en) * | 2022-08-19 | 2024-02-22 | 深圳麦克韦尔科技有限公司 | Multi-layer induction heating body, preparation method therefor and use thereof |
| CN117774454A (en) * | 2024-02-19 | 2024-03-29 | 深圳市卓亮迪科技有限公司 | Multilayer susceptor composite material and preparation method thereof |
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| Publication number | Publication date |
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| WO2024037088A1 (en) | 2024-02-22 |
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