CN113475755A - Heating element and preparation method thereof, atomizer and atomization device - Google Patents
Heating element and preparation method thereof, atomizer and atomization device Download PDFInfo
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Images
Classifications
-
- 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
- A24F40/10—Devices using liquid inhalable precursors
-
- 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
-
- 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
-
- 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
- A24F40/50—Control or monitoring
- A24F40/57—Temperature control
-
- 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
Abstract
The application discloses a heating element and a preparation method thereof, an atomizer and an atomization device, wherein the heating element comprises a heating element body, and the heating element body contains a PTCR ceramic material; the curie temperature of PTCR ceramic materials is: 200 ℃ and 350 ℃. The PTCR ceramic material with high Curie temperature is used in the heating element, and after the temperature of the heating element reaches the Curie temperature, the resistance value of the material can be improved by several orders of magnitude, so that the function of powering off the heating element is realized; when the temperature of the heating element is reduced to be lower than the Curie temperature, the resistor is recovered to a normal value, the heating element can be normally electrified and generate heat, a temperature control circuit is not required to be designed to control the atomization temperature, and the design and production cost of the atomization device is reduced. The PTCR ceramic material adopted by the application has Curie temperature of 200-350 ℃, can improve the precision of temperature control, and can realize effective atomization of oil smoke.
Description
Technical Field
The invention relates to the technical field of atomization, in particular to a heating element, a preparation method thereof, an atomizer and an atomization device.
Background
In the tobacco tar atomization process of the traditional electronic atomization device, the atomization temperature is an important influence factor of nicotine and essence release. Too high an atomization temperature can lead to the formation of harmful substances and to a core-pasting phenomenon of the atomization device. The traditional electronic atomization device mostly adopts electrothermal alloy (such as nickel-chromium alloy, iron-chromium-aluminum alloy and stainless steel) to heat the tobacco tar. Because the restriction of electrothermal alloy material, accurate temperature control is difficult to realize to traditional atomizing device, therefore can't effective control tobacco tar's atomization effect. Meanwhile, the electrothermal alloy often needs to control the atomization temperature through a temperature control circuit, and further the design difficulty and cost of the product are increased.
Disclosure of Invention
The application aims to provide a heating body, a preparation method thereof, an atomizer and an atomization device.
In order to achieve the purpose, the following technical scheme is adopted in the application:
a first aspect of the present application discloses a heating element, including a heating element body, the heating element body containing a PTCR ceramic material; the curie temperature of PTCR ceramic materials is: 200 ℃ and 350 ℃.
The PTCR ceramic material with high Curie temperature is used in the heating element, and after the temperature reaches the Curie temperature, the resistance value of the material can be improved by several orders of magnitude, so that the function of powering off the heating element is realized; when the temperature is reduced to be lower than the Curie temperature, the resistor recovers to a normal value, the heating body can be normally electrified and generate heat, a temperature control circuit is not required to be designed to control the atomization temperature, and the design and production cost of the atomization device is reduced. The PTCR ceramic material Curie temperature adopted by the application is 200-350 ℃, the temperature can realize effective atomization of oil smoke, and meanwhile, the temperature can be accurately controlled.
In one implementation mode of the heating body, the heating body is formed by mixing a PTCR ceramic material and an organic auxiliary agent, wherein the organic auxiliary agent is an organic binder or an organic carrier;
preferably, the mass ratio of the PTCR ceramic material to the organic auxiliary agent is 7: 3-5: 5;
preferably, the organic binder comprises paraffin, polyethylene, polypropylene, stearic acid;
preferably, the organic carrier comprises terpineol, butyl carbitol, dibutyl phthalate, ethyl cellulose, and a surfactant;
preferably, the organic binder comprises 65-85 parts of paraffin, 10-30 parts of polyethylene, 3-5 parts of polypropylene and 0-2 parts of stearic acid, based on 100 parts by mass of the organic binder;
preferably, the organic carrier comprises 30-50 parts of terpineol, 10-30 parts of butyl carbitol, 5-15 parts of dibutyl phthalate, 15-35 parts of ethyl cellulose and 3-7 parts of surfactant based on 100 parts by mass of the organic carrier.
In one implementation of the present application, the PTCR ceramic material includes PTCR ceramic powder and a curie temperature shifting agent; wherein the PTCR ceramic powder comprises BaCO3、TiO2、Bi2O3、Na2CO3The Curie temperature shift agent comprises an oxide of a first element and an oxide of a second element; the first element comprises at least one of Y, La, Sb and Nb, and the second element comprises at least one of Mn, Al and Si;
preferably, BaCO3、TiO2、Bi2O3、Na2CO3In a molar ratio of (0.9-0.95): 1: (0.03-0.05): (0.03-0.05);
preferably, the mole ratio of the oxide of the first element to the PTCR ceramic powder is: (0-0.01): 1;
preferably, the mole ratio of the oxide of the first element to the PTCR ceramic powder is: (0-0.005): 1;
preferably, the curie temperature of the PTCR ceramic material is: 250 ℃ to 300 ℃.
In one implementation manner of the present application, the heating element body is in a grid shape;
preferably, the heating body further comprises electrodes distributed on both sides of the heating body.
The second aspect of the present application discloses an atomizer employing the above heat-generating body.
A third aspect of the present application discloses an electronic atomizing device that employs the above-described heat-generating body or atomizer.
A fourth aspect of the present application discloses a method for producing a heat-generating body, including the step of producing a heat-generating body:
mixing PTCR ceramic powder and a Curie temperature shifting agent in proportion and carrying out ball milling to obtain mixed powder;
heating the mixed powder to 800-.
In one implementation of the present application, mixing a PTCR ceramic material with an organic additive to make a heat generating body specifically includes:
mixing the PTCR ceramic material with an organic binder to prepare a heating element master batch, and carrying out injection molding, plastic discharging and sintering on the heating element master batch to obtain a heating element body;
or mixing the PTCR ceramic material with an organic carrier to form heating thick film slurry, and coating the heating thick film slurry on the surface of the ceramic substrate to prepare a heating thick film so as to obtain a heating body;
preferably, the calcination time is 1-3 h; the ball milling time is 1-3 h; the heating rate is 0.5-5 ℃/h;
preferably, the PTCR ceramic powder comprises BaCO3、TiO2、Bi2O3、Na2CO3；
Preferably, the curie temperature shifting agent includes an oxide of a first element, an oxide of a second element; the first element comprises at least one of Y, La, Sb and Nb, and the second element comprises at least one of Mn, Al and Si;
preferably, BaCO3、TiO2、Bi2O3、Na2CO3In a molar ratio of (0.9-0.95): 1: (0.03-0.05): (0.03-0.05);
preferably, the mole ratio of the oxide of the first element to the PTCR ceramic powder is: (0-0.01): 1;
preferably, the mole ratio of the oxide of the first element to the PTCR ceramic powder is: (0-0.005): 1.
in an implementation manner of the present application, the method further includes: after the heating body was prepared, the electrodes were fixed to the heating body by silver paste.
In an implementation manner of the present application, the method further includes: after the heating body is prepared, the electrodes are coated on the ceramic substrate, so that the electrodes are distributed on two sides of the heating thick film and are connected with the heating thick film.
Due to the adoption of the technical scheme, the beneficial effects of the application are as follows:
the PTCR ceramic material with high Curie temperature is used in the heating element, and after the temperature of the heating element reaches the Curie temperature, the resistance value of the material can be improved by several orders of magnitude, so that the function of powering off the heating element is realized; when the temperature of the heating element is reduced to be lower than the Curie temperature, the resistor is recovered to a normal value, the heating element can be normally electrified and generate heat, a temperature control circuit is not required to be designed to control the atomization temperature, and the design and production cost of the atomization device is reduced. The PTCR ceramic material adopted by the application has Curie temperature of 200-350 ℃, can realize accurate control on the temperature, and can realize effective atomization on oil smoke.
Drawings
FIG. 1 is a schematic view of a structure of a heat-generating body provided in example 1;
FIG. 2 is a schematic view of a structure of a heat-generating body provided in example 2;
FIG. 3 is a graph showing resistance temperature characteristics of the heating elements provided in examples 1 and 2 and comparative example 1;
FIG. 4 is a schematic view showing the temperature change after energization of the heating elements provided in examples 1 and 2 and comparative example 1.
Detailed Description
The present invention will be described in further detail with reference to the following embodiments. In the following description, numerous details are set forth in order to provide a better understanding of the present application. However, those skilled in the art will readily recognize that some of the features may be omitted in different instances or may be replaced by other materials, methods. In some instances, certain operations related to the present application have not been shown or described in detail in order to avoid obscuring the core of the present application from excessive description, and it is not necessary for those skilled in the art to describe these operations in detail, so that they may be fully understood from the description in the specification and the general knowledge in the art.
Furthermore, the features, operations, or characteristics described in the specification may be combined in any suitable manner to form various embodiments. Also, the various steps or actions in the method descriptions may be transposed or transposed in order, as will be apparent to one of ordinary skill in the art. Thus, the various sequences in the specification are for the purpose of clearly describing one embodiment only and are not meant to be necessarily order unless otherwise indicated where a certain order must be followed.
The traditional electronic atomization device mostly adopts electrothermal alloy (such as nickel-chromium alloy, iron-chromium-aluminum alloy and stainless steel) to heat the tobacco tar. Because the restriction of electrothermal alloy material, accurate temperature control is difficult to realize to traditional atomizing device, therefore can't effective control tobacco tar's atomization effect. Meanwhile, the electrothermal alloy often needs to control the atomization temperature through a temperature control circuit, and further the design difficulty and cost of the product are increased.
In view of the above defects in the prior art, the embodiment provides a heating body, which includes a heating body, when the heating body is powered on, the heating body can convert electric energy into heat energy to heat tobacco tar, so that the tobacco tar is atomized into air to form aerosol, specifically, the heating body contains a PTCR ceramic material, the PTCR ceramic material is a material with a positive temperature coefficient resistance characteristic, when the heating body is powered on, the electric energy can be converted into heat energy to raise the temperature of the heating body, when the temperature is raised to a curie temperature, the resistance value of the PTCR ceramic material is suddenly increased by several orders of magnitude, so that the heating body automatically stops conducting due to the extremely large resistance, when the temperature is lowered to the curie temperature, the resistance of the heating body is lowered and automatically restores to a power-on state, and the heating body is continuously heated, so as to atomize the tobacco tar; to achieve the desired atomization, the curie temperature of the PTCR ceramic material of this example is: 200 ℃ and 350 ℃.
It should be noted that, the PTCR ceramic material with high curie temperature is used in the heating element, and after the temperature reaches the curie temperature, the resistance value of the material can be increased by several orders of magnitude, thereby realizing the function of powering off the heating element; when the temperature is reduced to be lower than the Curie temperature, the resistor recovers to a normal value, the heating body can be normally electrified and generate heat, a temperature control circuit is not required to be designed to control the atomization temperature, and the design and production cost of the atomization device is reduced. The PTCR ceramic material adopted by the application has Curie temperature of 200-350 ℃, can realize effective atomization of oil smoke, and simultaneously improves the control precision of the atomization temperature.
In one implementation manner of this embodiment, the heating body is formed by mixing a PTCR ceramic material and an organic additive, and then the PTCR ceramic material is made into the heating body by injection molding, thick film printing, or tape casting, which is flexible and simple in process. In this embodiment, the mass ratio of the PTCR ceramic material and the organic auxiliary agent is not limited as long as the power-on/off operation of the heating element is not affected. In one implementation manner of this embodiment, the mass ratio of the PTCR ceramic material to the organic auxiliary agent is 7: 3-5: 5. specifically, the organic auxiliary agent may be an organic binder, and the PTCR ceramic material may be made into a heating element body by injection molding, or the organic auxiliary agent may be an organic carrier, and the PTCR ceramic material may be made into a heating thick film on a porous ceramic substrate by thick film printing, so as to obtain the heating element body.
In a specific implementation manner of this embodiment, the organic binder includes paraffin, polyethylene, polypropylene, and stearic acid, and the organic binder includes, by 100 parts by mass of the organic binder, 65 to 85 parts by mass of paraffin, 10 to 30 parts by mass of polyethylene, 3 to 5 parts by mass of polypropylene, and 0 to 2 parts by mass of stearic acid; the organic carrier comprises 30-50 parts of terpineol, 10-30 parts of butyl carbitol, 5-15 parts of dibutyl phthalate, 15-35 parts of ethyl cellulose and 3-7 parts of surfactant according to 100 parts by mass of the organic carrier.
In this embodiment, the components of the PTCR ceramic material are not particularly limited as long as the curie temperature of the PTCR ceramic material is 200-. In one implementation of this embodiment, the PTCR ceramic material includes PTCR ceramic powder and a curie temperature shifting agent; wherein the PTCR ceramic powder comprises BaCO3、TiO2、Bi2O3、Na2CO3To form the ceramic material with PTCR effect, the Curie temperature shifting agent comprises an oxide of a first element and an oxide of a second element, the first element comprises at least one of Y, La, Sb and Nb, and the second element comprises at least one of Mn, Al and Si, so as to increase the Curie temperature of the ceramic material with PTCR effect to enable the Curie temperature to reach 200-350 ℃, thereby ensuring the atomization efficiency when the heating body reaches the temperature. In a specific implementation manner of this embodiment, BaCO3、TiO2、Bi2O3、Na2CO3In a molar ratio of (0.9-0.95): 1: (0.03-0.05): (0.03-0.05), the molar ratio of the oxide of the first element to the PTCR ceramic powder being: (0-0.01): 1; the mole ratio of the oxide of the first element to the PTCR ceramic powder is: (0-0.005): 1.
in this embodiment, the shape of the heating element body is not particularly limited, and may be a sheet or a ring, and may be designed according to the shape required by the atomizing surface, and in order to obtain a better atomizing effect, the heating element body may be in a mesh shape, so that the tobacco tar can better enter the air after being atomized to form aerosol.
In an implementation manner of this embodiment, the heating element further includes electrodes distributed on two sides of the heating element body, and the electrodes are used for connecting a power supply and electrifying the heating element, so that the heating element converts electric energy into heat energy.
Therefore, this embodiment still provides an atomizer that adopts above-mentioned heat-generating body for atomize the tobacco tar, and can improve atomization effect according to the accurate control atomization temperature of the curie temperature of PTCR ceramic material in the heat-generating body, need not design the control by temperature change circuit, effectively reduced the design cost and the degree of difficulty of atomizer.
Further, the embodiment also provides an electronic atomization device adopting the heating body or the atomizer.
In order to achieve the technical effects of the above heating element, this embodiment further provides a method for manufacturing a heating element, including the steps of:
mixing PTCR ceramic powder and a Curie temperature shifting agent in proportion and carrying out ball milling to obtain mixed powder;
heating the mixed powder to 800-.
In an implementation manner of this embodiment, in order to enable the PTCR ceramic material to be used in a heating element, an organic binder or an organic carrier is used, the PTCR ceramic material may be made into heating element bodies of different types according to the use requirements of different scenes, and specifically, mixing the PTCR ceramic material with an organic auxiliary agent to make the heating element body specifically includes:
the PTCR ceramic material and the organic binder are mixed to prepare the heating element master batch, the heating element master batch is injected and molded to obtain the heating element body, and the heating element body prepared by the method can form different shapes to meet the requirements on different structures of the heating element; after the heating body is prepared, the electrode is fixed on the heating body through high-temperature silver paste, and specifically, the electrode can be fixed on the heating body through the silver paste with the curing temperature of 400-600 ℃.
Or, the PTCR ceramic material and the organic carrier are mixed to form heating thick film slurry, the heating thick film slurry is coated on the surface of the ceramic substrate to form a heating thick film so as to obtain the heating body, and specifically, the heating thick film slurry can be prepared into the heating film on the porous ceramic substrate in a screen printing mode after screen printing, plastic discharging and sintering. The heating body prepared by the method can form a heating body with the porous ceramic matrix, and the tobacco tar led out from the porous ceramic matrix is heated and atomized, so that the atomization effect of the tobacco tar is improved. And after the heating body is prepared, coating the electrodes on the ceramic substrate, so that the electrodes are distributed on two sides of the heating thick film and are connected with the heating thick film to obtain the heating body.
In this embodiment, the processing technique of the PTCR ceramic powder and the curie temperature shifting agent is not particularly limited as long as the PTCR ceramic material having a curie temperature of 200-. In a specific implementation manner of this embodiment, the calcination time is 1 to 3 hours; the ball milling time is 1-3 h; the heating rate is 0.5-5 ℃/h.
This application will be further illustrated by the following specific examples. It should be understood that the examples are illustrative only and are not to be construed as limiting the scope of the present application.
Preparation of heating element
Example 1
As shown in fig. 1, fig. 1 is a schematic structural diagram of a heating body of the present embodiment, the heating body includes a heating body 11, the heating body 11 is made of PTCR ceramic material, electrodes 12 are covered on both sides of the heating body 11, and the curie temperature of the PTCR ceramic material is 275 ℃. The heat-generating body of this example was prepared as follows:
mixing BaCO3、TiO2、Bi2O3、Na2CO3Powder 0.92: 1: 0.04: 0.04 mol ratio, adding 0-0.01mol of oxide of a first element and 0-0.0005mol of oxide of a second element into 1mol of ceramic powder, and ball-milling for 2 hours to obtain mixed powder, wherein the first element is at least one of Y, La, Sb and Nb, and the second element is at least one of Mn, Al and Si; heating the mixed powder to 900 ℃ at the speed of 5 ℃/min, calcining for 2 hours, performing secondary ball milling on the calcined mixed powder for 2 hours to obtain a PTCR ceramic material, and banburying and mixing the PTCR ceramic material and an organic binder to form an injectionThe master batch comprises a master batch, wherein the organic binder comprises 75 parts by mass of paraffin, 20 parts by mass of polyethylene, 4 parts by mass of polypropylene and 1 part by mass of stearic acid; the heating body structure shown in fig. 1 was prepared using a standard injection molding process, and the electrodes were connected to the heating body by high temperature silver paste.
Example 2
As shown in fig. 2, fig. 2 is a schematic structural diagram of the heating element of the present embodiment, the heating element is composed of a porous ceramic substrate 22 and a heating film 21 covering the surface of the porous ceramic substrate, electrodes 23 are covered on both sides of the heating film 21, the heating film 21 contains PTCR ceramic material, and the curie temperature of the PTCR ceramic material is 250 ℃.
The heat-generating body of this example was prepared as follows:
mixing BaCO3、TiO2、Bi2O3、Na2CO3The powder was mixed at a ratio of 0.92: 1: 0.04: 0.04 to form ceramic powder, adding 0 to 0.01mol of first element oxide and 0 to 0.0005mol of second element oxide into 1mol of ceramic powder, and performing ball milling for 2 hours to obtain mixed powder, wherein the first element is at least one of Y, La, Sb and Nb, and the second element is at least one of Mn, Al and Si; heating the mixed powder to 900 ℃ at the speed of 5 ℃/min, calcining for 2 hours, carrying out secondary ball milling on the calcined mixed powder for 2 hours to obtain a PTCR ceramic material, and mixing the PTCR ceramic material with an organic carrier to form thick film slurry, wherein the organic carrier comprises 40 parts by mass of terpineol, 20 parts by mass of butyl carbitol, 10 parts by mass of dibutyl phthalate, 25 parts by mass of ethyl cellulose and 5 parts by mass of a surfactant; and coating the thick film slurry on the surface of the porous ceramic substrate by using a standard screen printing process to form a heating film, and coating the electrodes on the ceramic substrate so that the electrodes are distributed on two sides of the heating thick film and are connected with the heating thick film to obtain the heating body.
Comparative example 1
The specific structure and working and molding manner of the heat-generating body in comparative example 1 were the same as those in example 2 except that the Curie temperature of the PTCR ceramic material used in comparative example 1 was 175 ℃. The heat-generating body of comparative example 1 was prepared as follows:
mixing BaCO3、TiO2、Bi2O3、Na2CO3The powder was mixed at a ratio of 0.96: 1: 0.02: 0.02, forming ceramic powder, heating the ceramic powder to 900 ℃ at the speed of 5 ℃/min, calcining for 2 hours, performing secondary ball milling on the calcined mixed powder for 2 hours to obtain a PTCR ceramic material, and mixing the PTCR ceramic material with an organic carrier to form thick film slurry, wherein the organic carrier comprises 40 parts by mass of terpineol, 20 parts by mass of butyl carbitol, 10 parts by mass of dibutyl phthalate, 25 parts by mass of ethyl cellulose and 5 parts by mass of a surfactant; and coating the thick film slurry on the surface of the porous ceramic substrate by using a standard screen printing process to form a heating film, and coating the electrodes on the ceramic substrate so that the electrodes are distributed on two sides of the heating thick film and are connected with the heating thick film to obtain the heating body.
Comparative example 2
Comparative example 2 a metal etching sheet made of SS316L stainless steel was used as a heat generating element, and the resistance value of the heat generating sheet was measured and the temperature was controlled by comparing the Temperature Coefficient of Resistance (TCR) of the heat generating sheet material.
Comparative example 3
Comparative example 3 a metal etching sheet made of an iron-chromium-aluminum alloy was used as a heating element, and a temperature sensor (NTC thermistor) was fixed to the metal etching sheet on the heating element using high-temperature glass powder. The temperature is measured and controlled by detecting the resistance value of the thermistor and comparing the resistance Temperature Coefficient (TCR) of the thermistor.
Curie temperature detection
The resistance of the PTCR ceramic material used for the heating elements prepared in examples 1 and 2 was measured using a digital multimeter at a test voltage of 1.5V dc to obtain a resistance temperature profile. From the resistance temperature plot, the resistivity of the PTCR ceramic material of example 1 jumps by 3 orders of magnitude at 250 ℃ and the resistivity of the PTCR ceramic material of example 2 jumps by 3 orders of magnitude at 275 ℃, and further, the curie temperature of the PTCR ceramic material of example 1 is 250 ℃ and the curie temperature of the PTCR ceramic material of example 2 is 275 ℃.
Third, temperature control Performance comparison
The heating elements prepared in example 1, example 2 and comparative example 1 were subjected to a temperature control performance test at a test voltage of 15V DC, and the heating elements were energized for 20 seconds, and the temperatures of the heating elements at different times were recorded using a thermocouple fixed at the midpoint of the heating surface of the heating elements. According to the results of the temperature control performance test, the temperature difference ranges of the example 1 and the example 2 are about +/-10 ℃, and the temperature of the heating element is basically stabilized near the Curie temperature of the material. The temperature difference in comparative example 1 was about. + -. 25 ℃ and the temperature of the heating element was between 150 ℃ and 200 ℃.
Fourth, comparison of atomization Effect
The atomization effects of the atomization devices using the heat-generating bodies prepared in example 1, example 2 and comparative example 1 were compared, including the amount of smoke and the mouth feel of the inhaled smoke, and the comparison results are shown in table 1. As is clear from Table 1, when the Curie temperature of the heat-generating body is lower than 200 ℃ (i.e., the heat-generating body of comparative example 1), the atomizing effect of the atomizing device is not good.
TABLE 1 atomization Effect of different heaters
| Heating body | Temperature control range | Amount of smoke | Taste of the product |
| Example 1 | 275±10℃ | Is larger | Is normal |
| Example 2 | 250±10℃ | Is larger | Slight dilution of color |
| Comparative example 1 | 175±25℃ | Is smaller | Has no fragrance |
Fifth, temperature control method comparison
The advantages and disadvantages of the three heat-generating bodies prepared in comparative example 1, comparative example 2 and comparative example 3 were compared, and the comparison results are shown in Table 2. As can be seen from table 2, the heating element having the PTCR characteristic has a low heating speed, and is superior to the temperature control methods of comparative examples 2 and 3 in temperature control accuracy, circuit complexity, and atomizer assembly difficulty.
TABLE 2 comparison of advantages and disadvantages of different heating element temperature control methods
The present application has been described with reference to specific examples, which are provided only to aid understanding of the present invention and are not intended to limit the present invention. For a person skilled in the art to which the invention pertains, several simple deductions, modifications or substitutions may be made according to the idea of the invention.
Claims (10)
1. A heating body is characterized by comprising a heating body, wherein the heating body contains a PTCR ceramic material; the curie temperature of the PTCR ceramic material is: 200 ℃ and 350 ℃.
2. A heating body as claimed in claim 1, characterized in that the heating body is formed by mixing PTCR ceramic material and organic auxiliary agent, the organic auxiliary agent being organic binder or organic carrier;
preferably, the mass ratio of the PTCR ceramic material to the organic auxiliary agent is 7: 3-5: 5;
preferably, the organic binder comprises paraffin, polyethylene, polypropylene, stearic acid;
preferably, the organic carrier comprises terpineol, butyl carbitol, dibutyl phthalate, ethyl cellulose and a surfactant;
preferably, the organic binder comprises 65-85 parts of paraffin, 10-30 parts of polyethylene, 3-5 parts of polypropylene and 0-2 parts of stearic acid, based on 100 parts by mass of the organic binder;
preferably, the organic carrier comprises 30-50 parts of terpineol, 10-30 parts of butyl carbitol, 5-15 parts of dibutyl phthalate, 15-35 parts of ethyl cellulose and 3-7 parts of a surfactant, wherein the parts by mass of the organic carrier are 100 parts.
3. The heating body according to claim 2, wherein the PTCR ceramic material comprises PTCR ceramic powder and a Curie temperature shifting agent; wherein the PTCR ceramic powder comprises BaCO3、TiO2、Bi2O3、Na2CO3The Curie temperature shift agent comprises an oxide of a first element, an oxide of a second element; the first element comprises at least one of Y, La, Sb and Nb, and the second element comprises at least one of Mn, Al and Si;
preferably, the BaCO3、TiO2、Bi2O3、Na2CO3In a molar ratio of (0.9-0.95): 1: (0.03-0.05): (0.03-0.05);
preferably, the mole ratio of the oxide of the first element to the PTCR ceramic powder is: (0-0.01): 1;
preferably, the mole ratio of the oxide of the first element to the PTCR ceramic powder is: (0-0.005): 1;
preferably, the curie temperature of the PTCR ceramic material is: 250 ℃ to 300 ℃.
4. A heat-generating body as described in claim 3, characterized in that the heat-generating body is in a mesh shape;
preferably, the heating element further comprises a ceramic substrate, and the heating element body is coated on the surface of the ceramic substrate or embedded in the ceramic substrate;
preferably, the heating element further comprises electrodes distributed on two sides of the heating element body.
5. An atomizing core using the heat-generating body described in any one of claims 1 to 4.
6. An electronic atomizing device using the heat-generating body as described in any one of claims 1 to 4 or the atomizing core as described in claim 5.
7. A method for preparing a heating element is characterized by comprising the following steps of:
mixing PTCR ceramic powder and a Curie temperature shifting agent in proportion and carrying out ball milling to obtain mixed powder;
heating the mixed powder to 800-.
8. A heat-generating body production method as described in claim 7, wherein the mixing of the PTCR ceramic material with the organic auxiliary agent to produce the heat-generating body specifically includes:
mixing a PTCR ceramic material with an organic binder to prepare a heating element master batch, and carrying out injection molding on the heating element master batch to obtain a heating element body;
or mixing the PTCR ceramic material with an organic carrier to form heating thick film slurry, and coating the heating thick film slurry on the surface of the ceramic substrate to prepare a heating thick film so as to obtain a heating body;
preferably, the calcination time is 1-3 h; the ball milling time is 1-3 h; the heating rate is 0.5-5 ℃/h;
preferably, the PTCR ceramic powder comprises BaCO3、TiO2、Bi2O3、Na2CO3；
Preferably, the curie temperature shifting agent comprises an oxide of a first element, an oxide of a second element; the first element comprises at least one of Y, La, Sb and Nb, and the second element comprises at least one of Mn, Al and Si;
preferably, the BaCO3、TiO2、Bi2O3、Na2CO3In a molar ratio of (0.9-0.95): 1: (0.03-0.05): (0.03-0.05);
preferably, the mole ratio of the oxide of the first element to the PTCR ceramic powder is: (0-0.01): 1;
preferably, the mole ratio of the oxide of the first element to the PTCR ceramic powder is: (0-0.005): 1.
9. a heat-generating body production method as described in claim 8, characterized by further comprising: after the heating body was prepared, the electrodes were fixed to the heating body by silver paste.
10. A heat-generating body production method as described in claim 8, characterized by further comprising: after the heating body is prepared, the electrodes are coated on the ceramic substrate, so that the electrodes are distributed on two sides of the heating thick film and are connected with the heating thick film.
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| EP4265136A1 (en) * | 2022-04-20 | 2023-10-25 | Shenzhen Smoore Technology Limited | Ceramic, ceramic preparation method, atomization core, atomizer, and electronic atomization device |
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