CN115708596B - Ceramic atomizing core and preparation method thereof - Google Patents
Ceramic atomizing core and preparation method thereof Download PDFInfo
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Abstract
A ceramic atomizing core and a preparation method thereof can be applied to the preparation of the ceramic atomizing core in an aerosol generating device. The invention discloses a ceramic atomizing core, which comprises a porous ceramic matrix and a heating component, wherein the porous ceramic matrix is a semi-cylinder, the upper end surface of the porous ceramic matrix is a plane, and the heating component is printed on the upper end surface of the ceramic atomizing core in a screen printing mode; the lower terminal surface of porous ceramic base member is the cambered surface, and the cambered surface helps aerosol matrix to conduct to the inside of ceramic atomizing core through capillary force to in time supply the aerosol matrix that atomizing consumed, prevent the problem of dry combustion method burnt core, not only this, the ceramic atomizing core of preparing still has characteristics such as aperture is big, the porosity is high, aerosol matrix's conduction velocity is fast, has effectively solved the current atomizing core on the market and has burnt core, generate heat uneven, the problem that user experience that atomizing efficiency brought is felt poorly.
Description
Technical Field
The invention relates to the field of atomizers, in particular to a ceramic atomizing core and a preparation method thereof.
Background
The atomization core in the aerosol generating device structure is an important structure for generating aerosol matrixes, and along with the development of an electronic atomization technology, the existing atomization cores in the market are gradually diversified, and the atomization cores can be divided into cotton core atomization cores, ceramic atomization cores and the like. The main manufacturing process of the cotton core atomization core is to wind a metal heating wire on the cotton core, the process needs to wind and wrap cotton manually, the production efficiency is low, the consistency of products is poor, in addition, the cotton core is easy to burn to produce burnt smell, and the uncomfortable experience of choking the throat is brought; the ceramic atomizing core is mainly prepared by integrally forming a metal heating wire and a porous ceramic matrix, and the current widely applied ceramic atomizing core preparation process comprises the following steps: the ceramic atomizing core prepared by the process flow is easy to cause the problems of core pasting, uneven heating and the like in the use process, and influences the user experience.
Disclosure of Invention
The embodiment of the invention provides a ceramic atomizing core and a preparation method thereof, and aims to solve the problem that an atomizing core prepared by the existing manufacturing process is easy to bring about reduced user experience in the use process.
In a first aspect, an embodiment of the present invention discloses a ceramic atomizing core, where the ceramic atomizing core includes a porous ceramic matrix and a heat generating component, and the heat generating component is disposed on a surface of the porous ceramic matrix; the porous ceramic matrix is a semi-cylinder, the upper end face of the porous ceramic matrix is a plane, and the lower end face of the porous ceramic matrix is a cambered surface; the heating component comprises a heating circuit and contact pins, and is arranged on the upper end face of the porous ceramic matrix.
The outside parcel of pottery atomizing core is provided with the oil storage cotton.
Wherein, the inside of the porous ceramic matrix is provided with through holes, the average pore diameter of the through holes is 10-100 mu m, and the porosity of the porous ceramic matrix is 55-70%.
The main elements of the porous ceramic matrix comprise Si, al, O, ca, K, na, fe, mg, ti, wherein the total weight of three elements of Si, al and O is more than 70wt%.
The heating circuit is in one or a combination of more of S-shaped, wave-shaped, pear-shaped and mountain-shaped; the resistance value of the heating circuit is 0.7-3.0Ω; the resistance value of the contact pin is less than or equal to 0.4Ω.
In a second aspect, the embodiment of the invention also discloses a preparation method of the ceramic atomizing core, which is used for preparing the ceramic atomizing core according to the first aspect, and the preparation method comprises the following steps:
s1, weighing raw materials according to a preset mixing formula, and then placing the raw materials into a mixer to mix for a preset mixing time period to prepare powder; wherein the formula of the preset mixture comprises 25-45 parts of ceramic powder, 5-20 parts of glass powder, 20-60 parts of pore-forming agent and 4-20 parts of binder, and the preset mixture lasts for 1-3 hours;
s2, placing the powder into an open-close internal mixer, adding water into the powder according to a preset internal mixing feed liquid ratio, and carrying out internal mixing for a preset internal mixing time period to prepare pug; wherein the preset banburying feed liquid ratio is powder in parts by weight: water = 100: 15-100: 40, the preset banburying time is 1-4 hours;
s3, placing the pugs in a sealing bag, standing for a preset period of time to prepare stale pugs; wherein the preset ageing time is 1-3 days;
s4, placing the aged pugs into an extruder, and sequentially extruding and slitting the aged pugs to prepare a strip blank;
s5, placing the strip blank in a punch press and punching to prepare a wet blank with a required shape;
s6, placing the wet blank into a drying box, and drying at a preset drying temperature until the weight is constant to prepare a dry blank; wherein the preset drying temperature is 60-150 ℃;
s7, placing the dry blank in a box-type resistance furnace, sintering the dry blank under a preset first sintering condition, and cooling to prepare a porous ceramic matrix; wherein the preset first sintering condition is air atmosphere, the sintering temperature is 1000-1400 ℃, and the heat preservation time is 10-120 min;
s8, placing the porous ceramic matrix in a jig, printing metal slurry on the upper end surface of the porous ceramic matrix in a screen printing mode, and then drying under a preset first drying condition to prepare a matrix to be burned; wherein, the first drying condition is preset to be that the drying is carried out for 10 to 60 minutes at the temperature of 40 to 100 ℃;
s9, placing the substrate to be sintered into an atmosphere furnace, and sintering the substrate to be sintered in a protective atmosphere under a preset second sintering condition to prepare a ceramic atomization core; wherein the preset second sintering condition is that the sintering temperature is 800-1100 ℃, the heat preservation time is 10-60 min, and the protective atmosphere is H 2 、N 2 And one or more of Ar; or sintering in a vacuum environment.
Wherein the mesh number of the ceramic powder is 100-400 meshes, and optionally, the ceramic powder is one or more of quartz, alumina, diatomite and silicon carbide. The median particle diameter of the glass powder is 1-60 mu m. The pore-forming agent has a mesh number of 100-1000 meshes, and optionally, the pore-forming agent is one or more of wood powder, carbon powder, wheat flour, starch and polymethyl methacrylate (PMMA). Optionally, the binder is one or more of hydroxypropyl methylcellulose, sodium carboxymethylcellulose (CMC), and polyvinyl alcohol (PVA).
According to the ceramic atomizing core and the preparation method thereof provided by the invention, the upper end face of the prepared ceramic atomizing core is a plane, and the heating component is printed in the middle position of the upper end face of the ceramic atomizing core in a screen printing mode; the lower end face of the prepared ceramic atomizing core is an arc face, the lower end face is the arc face, the aerosol matrix is conducted to the inside of the ceramic atomizing core through capillary force, the aerosol matrix consumed by atomization is supplemented in time, the problem of dry burning of the core is prevented, the prepared ceramic atomizing core has the characteristics of large aperture, high porosity, high conducting speed of the aerosol matrix and the like, and the problem of poor user experience caused by uneven heating and low atomization efficiency of the core is effectively solved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments 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 may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic illustration of a ceramic atomizing core according to an embodiment of the present disclosure;
FIG. 2 is a schematic diagram of a ceramic atomizing core and an oil storage cotton according to an embodiment of the present disclosure;
FIG. 3 is a flow chart of a method for preparing a ceramic atomizing core according to an embodiment of the present disclosure.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be understood that the terms "comprises" and "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
It is also to be understood that the terminology used in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in this specification and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should be further understood that the term "and/or" as used in the present specification and the appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes such combinations.
The embodiment of the invention discloses a ceramic atomizing core, which is shown in fig. 1 and is a schematic structural diagram of the ceramic atomizing core disclosed by the embodiment of the invention. The ceramic atomizing core comprises a porous ceramic matrix 1 and a heating component 2, wherein the heating component 2 is arranged on the surface of the porous ceramic matrix 1; the porous ceramic matrix 1 is a semi-cylinder, the upper end face 11 of the porous ceramic matrix is a plane, the heating component 2 is conveniently screen-printed on the upper end face 11 of the porous ceramic matrix 1, the lower end face 12 of the porous ceramic matrix is an arc surface, the lower end face 12 is an arc surface, so that aerosol matrixes are conductive to the inside of the ceramic atomization core through capillary force, the consumed aerosol matrixes are timely supplemented, and the problem of dry burning of the core is prevented.
Fig. 2 is a schematic structural diagram of a ceramic atomizing core and an oil storage cotton according to an embodiment of the present invention. The outside parcel of pottery atomizing core 1 is provided with oil storage cotton 3. The oil storage cotton 3 is used for adsorbing tobacco tar, and the ceramic atomization core 1 is wrapped in the oil storage cotton 3, so that the ceramic atomization core 1 is indirectly contacted with the tobacco tar, and the oil leakage problem caused by large aperture of the ceramic atomization core 1 can be effectively avoided.
The heating component 2 comprises a heating circuit 22 and a contact pin 21, wherein the shape of the heating circuit 22 can be one or a combination of a plurality of S-shaped, wave-shaped, pear-shaped and mountain-shaped, and the resistance value of the heating circuit 22 is 0.7-3.0Ω; the resistance value of the contact pin 21 is less than or equal to 0.4Ω. The heating component 2 is formed by sequentially screen printing, drying and sintering metal slurry on the upper end face 11 of the porous ceramic matrix 1, the bonding degree of the heating component 2 formed by high-temperature sintering and the porous ceramic matrix 1 is higher, the consistency of the prepared ceramic atomizing core is better, the automatic assembly of the ceramic atomizing core can be realized, and the mass production of the aerosol generating device is facilitated.
The porous ceramic matrix 1 is internally provided with through holes, the average pore diameter of the through holes is 10-100 mu m, the porosity of the porous ceramic matrix 1 is 55-70% through Archimedes drainage test, and the prepared porous ceramic matrix 1 has the advantages of large pore diameter, high porosity, large oil storage capacity and high oil guiding speed, and effectively solves the problem of core pasting of the aerosol generating device in the use process.
The main elements of the porous ceramic matrix comprise Si, al, O, ca, K, na, fe, mg, ti, wherein the total weight of three elements of Si, al and O is more than 70wt%.
The embodiment of the invention also discloses a preparation method of the ceramic atomizing core, which is used for preparing the ceramic atomizing core, as shown in fig. 3, and comprises the following steps:
s1, mixing: weighing raw materials according to a preset mixing formula, and then placing the raw materials into a mixer to mix for a preset mixing time period to prepare powder; the raw materials for preparing the porous ceramic matrix comprise 25-45 parts of ceramic powder, 5-20 parts of glass powder, 20-60 parts of pore-forming agent and 4-20 parts of binder, wherein the preset mixing time is 1-3 hours;
optionally, the ceramic powder is one or more of quartz, alumina, diatomite and silicon carbide, the mesh number of the ceramic powder is 100-400 mesh, and the ceramic powder is used for forming a main blank;
optionally, the median particle size of the glass powder is 1-60 μm, the glass powder is added into the green body, and in the sintering process, the glass powder is filled into the main green body in a melting mode, so that the inside of the green body becomes more compact, and the deformation of the main green body is effectively reduced;
optionally, the pore-forming agent is one or more of wood powder, carbon powder, wheat flour, starch and PMMA, the mesh number of the pore-forming agent is 100-1000 meshes, and the pore-forming agent is used for forming internal holes of the blank body to prepare a porous blank body;
optionally, the binder is one or more of hydroxypropyl methylcellulose, CMC and PVA, and the binder is used for improving the adhesive force of each component in the blank.
S2, banburying: placing the powder into an open-close internal mixer, adding water into the powder according to a preset internal mixing feed liquid ratio, and carrying out internal mixing for a preset internal mixing time period to prepare pug; wherein the preset banburying feed liquid ratio is powder in parts by weight: water = 100: 15-100: 40, the preset banburying time is 1-3 hours; the banburying process has the advantages of large mixing capacity, short time, high production efficiency, better overcoming dust flying, reducing raw material loss, improving product quality and working environment, and being safe and convenient to operate.
S3, staling: placing the pug into a sealing bag, standing for a preset period of time to prepare a stale pug; wherein the preset ageing time is 1-3 days; the plasticity of the aged pugs is improved, and cracking of the blanks during molding and drying can be effectively avoided.
S4, extruding: placing the stale pug into an extruder, sequentially extruding and cutting the stale pug, and preparing a strip blank with a preset shape according to the product requirement; the extrusion process has the characteristics of low cost, high production efficiency and strong practicability;
s5, die cutting: placing the strip blank in a punch press and punching the strip blank, and preparing a wet blank with a required length according to the product requirement;
s6, drying: placing the wet blank into a drying box, and drying at a preset drying temperature to constant weight to prepare a dry blank; wherein the preset drying temperature is 60-150 ℃ and the time is 8-12h;
s7, first sintering: placing the dry blank into a box-type resistance furnace, sintering the dry blank under a preset first sintering condition, and cooling to prepare a porous ceramic matrix; wherein the preset first sintering condition is air atmosphere, the sintering temperature is 1000-1400 ℃, and the heat preservation time is 10-120 min; in the first sintering process, the ceramic powder forms a main blank body, and the glass powder is melted and filled in the main blank body, so that the interior of the blank body becomes more compact, and the deformation of the main blank body is reduced; the binder can bind the components and improve the internal adhesion of the main blank; the pore-forming agent reacts at high temperature and forms internal holes of the main blank body to prepare a porous ceramic matrix;
s8, printing: placing the porous ceramic matrix in a jig, printing metal slurry on the upper end surface of the porous ceramic matrix in a screen printing mode, then placing the porous ceramic matrix in a drying oven, and drying under a preset first drying condition to prepare a matrix to be burned; wherein, the first drying condition is preset to be that the drying is carried out for 10 to 60 minutes at the temperature of 40 to 100 ℃; the screen printing mode is flexible, different screen stencil plates can be used according to the use requirement, a metal paste coating with a required shape is prepared on the surface of the porous ceramic matrix, the prepared metal paste coating is uniform in thickness, and the screen printing mode has the characteristics of simple working procedure and high production efficiency, and the manufacturing cost is effectively reduced;
s9, second sintering: placing a substrate to be sintered into an atmosphere furnace, and sintering the substrate to be sintered in a protective atmosphere under a preset second sintering condition to prepare a ceramic atomization core;
optionally, the preset second sintering condition is that the sintering temperature is 800-1100 ℃, the heat preservation time is 10-60 min, and the protective atmosphere is H 2 、N 2 And one or more of Ar;
or, the preset second sintering condition is vacuum sintering, the pressure in the furnace is less than dozens of Pa (Pa) during vacuum sintering, the influence of the medium under vacuum on sintering is basically negligible, and the sintering effect can be effectively improved;
and in the second sintering process, the metal slurry coating is tightly combined with the porous ceramic matrix and is not easy to fall off, and the strength of the ceramic atomization core is improved.
Example 1
Example 1 discloses a preparation method of a ceramic atomizing core, which comprises the following specific steps:
s1, mixing: weighing raw materials according to a preset mixing formula, and then placing the raw materials into a mixer to mix for a preset mixing time period to prepare powder; the raw materials for preparing the porous ceramic matrix comprise ceramic powder, glass powder, pore-forming agents and binders, wherein a preset mixing formula comprises 45 parts of ceramic powder, 10 parts of glass powder, 40 parts of pore-forming agents and 5 parts of binders, and the preset mixing time is 2 hours;
the ceramic powder is a mixture of quartz and diatomite, wherein the mass ratio of the quartz to the diatomite is 3:1, and the mesh number of the ceramic powder is 100 mesh; the median particle diameter of the glass powder is 15 mu m; the pore-forming agent is a mixture of carbon powder and PMMA, wherein the mass ratio of the carbon powder to the PMMA is 1:1, and the mesh number of the pore-forming agent is 100 meshes; the binder is hydroxypropyl methylcellulose.
S2, banburying: placing the powder into an open-close internal mixer, adding water into the powder according to a preset internal mixing feed liquid ratio, and carrying out internal mixing for a preset internal mixing time period to prepare pug; wherein, the preset banburying material-liquid ratio is powder (mass): water (mass) =100: 30, the preset banburying time is 2 hours;
s3, staling: placing the pug into a sealing bag, standing for a preset period of time to prepare a stale pug; wherein the preset ageing time period is 2 days;
s4, extruding: placing the stale pug into an extruder, and sequentially extruding and cutting the stale pug to prepare a strip blank;
s5, die cutting: placing the strip blank in a punch press and punching to prepare a wet blank with a required shape;
s6, drying: placing the wet blank into a drying box, and drying at a preset drying temperature to constant weight to prepare a dry blank; wherein the preset drying temperature is 100 ℃;
s7, first sintering: placing the dry blank into a box-type resistance furnace, sintering the dry blank under a preset first sintering condition, and cooling to prepare a porous ceramic matrix; wherein the preset first sintering condition is air atmosphere, the sintering temperature is 1200 ℃, and the heat preservation time is 60min;
s8, printing: placing the porous ceramic matrix in a jig, printing metal slurry on the upper end surface of the porous ceramic matrix in a screen printing mode, then placing the porous ceramic matrix in a drying oven, and drying under a preset first drying condition to prepare a matrix to be burned; wherein, the first drying condition is preset to be that the drying is carried out for 50min at 60 ℃;
s9, second sintering: placing a substrate to be sintered into an atmosphere furnace, and sintering the substrate to be sintered in a protective atmosphere under a preset second sintering condition to prepare a ceramic atomization core, wherein the size of the prepared ceramic atomization core is 10mm x 3mm; wherein the preset second sintering condition is sintering temperature 1000 ℃, heat preservation time is 50min, and the protective atmosphere is N 2 。
Example 2
The difference from example 1 is that: in the step S1, a preset mixing formula comprises 36 parts of ceramic powder, 12 parts of glass powder, 40 parts of pore-forming agent and 12 parts of binder; the mesh number of the ceramic powder is 200 mesh; the median particle diameter of the glass powder is 5 mu m; the mesh number of the pore-forming agent is 200 meshes.
Example 3
The difference from example 1 is that: in the step S1, a preset mixing formula comprises 25 parts of ceramic powder, 10 parts of glass powder, 50 parts of pore-forming agent and 15 parts of binder; the mesh number of the ceramic powder is 300 meshes; the median particle diameter of the glass powder is 1 mu m; the mesh number of the pore-forming agent is 150 meshes.
Comparative examples
The difference from example 1 is that: in the step S1, a preset mixing formula comprises 40 parts of ceramic powder, 20 parts of glass powder, 30 parts of pore-forming agent and 10 parts of binder; the mesh number of the ceramic powder is 300 meshes; the median particle diameter of the glass powder is 1 mu m; the mesh number of the pore-forming agent is 150 meshes.
The ceramic atomizing cores prepared in examples 1 to 3 and comparative example were respectively tested for porosity, pore size and flexural strength by using an archimedes drainage method, a bubble point method and a three-point method, and the ceramic atomizing core products prepared in examples 1 to 3 and comparative example were respectively tested for oil absorption time under the same conditions, and the obtained experimental results are shown in table 1.
Table 1 results of the tests of porosity, pore diameter, flexural strength, oil absorption time of the porous ceramic atomized cores prepared in examples 1 to 3 and comparative example
| Sequence number | Porosity (%) | Average pore diameter (mum) | Flexural strength (MPa) | Oil absorption time (ms) |
| Example 1 | 56 | 80 | 15 | 500 |
| Example 2 | 60 | 70 | 12 | 300 |
| Example 3 | 65 | 50 | 8 | 210 |
| Comparative examples | 50 | 20 | 18 | 1500 |
Comparing the test results of Table 1, it is clear that the ceramic atomizing core prepared in example 2 has a porosity of 60%, an average pore diameter of 70 μm, a flexural strength of 12MPa, an oil absorption time of 300ms and the best overall performance; the ceramic atomized cores prepared in the comparative examples had a porosity of 50%, an average pore diameter of 20 μm, a flexural strength of 18MPa, and an oil absorption time of 1500ms, but the flexural strength was highest, but the porosity, average pore diameter, oil absorption time and the like were poor. According to experimental results, when the porosity of the ceramic atomizing core prepared by the method is 55-70%, the ceramic atomizing core has better comprehensive performance. In conclusion, the porous ceramic atomizing core prepared by the method has better comprehensive performance.
In order to further embody the beneficial effects of the present invention, the ceramic atomized core samples prepared in examples 1-3 were respectively connected to a circuit (specifically, the two ends of the heating component are connected to a power supply), the resistance values of the heating circuit and the contact pins were respectively measured, and the measurement results obtained are shown in table 2.
TABLE 2 measurement results of resistance values of heating wires and contact pins prepared in examples 1 to 3
| Sequence number | Heating circuit (omega) | Contact pin (omega) |
| Example 1 | 1.85 | 0.15 |
| Example 2 | 2.36 | 0.13 |
| Example 3 | 1.97 | 0.09 |
As can be seen from comparison of the measurement results in Table 2, the resistance values of the heating lines prepared in the examples 1 to 3 of the invention are all in the range of 0.8 to 3.0Ω, and the resistance values of the prepared contact pins are all less than or equal to 0.2Ω, so that the use requirements of the ceramic atomizing core product can be met (the resistance value of the heating line is less than 3.0Ω, and the resistance value of the contact pins is less than or equal to 0.3Ω).
According to the ceramic atomizing core and the preparation method thereof provided by the invention, the upper end face of the prepared ceramic atomizing core is a plane, and the heating component is printed in the middle position of the upper end face of the ceramic atomizing core in a screen printing mode; the lower end face of the prepared ceramic atomizing core is an arc face, the lower end face is the arc face, the aerosol matrix is conducted to the inside of the ceramic atomizing core through capillary force, the aerosol matrix consumed by atomization is supplemented in time, the problem of dry burning of the core is prevented, the prepared ceramic atomizing core has the characteristics of large aperture, high porosity, high conducting speed of the aerosol matrix and the like, and the problem of poor user experience caused by uneven heating and low atomization efficiency of the core is effectively solved.
While the invention has been described with reference to certain preferred embodiments, it will be understood by those skilled in the art that various changes and substitutions of equivalents may be made and equivalents will be apparent to those skilled in the art without departing from the scope of the invention. Therefore, the protection scope of the invention is subject to the protection scope of the claims.
Claims (6)
1. The ceramic atomizing core is characterized by comprising a porous ceramic matrix and a heating component, wherein the heating component is arranged on the surface of the porous ceramic matrix;
the porous ceramic matrix is a semi-cylinder, the upper end face of the porous ceramic matrix is a plane, and the lower end face of the porous ceramic matrix is a cambered surface;
the heating component comprises a heating circuit and contact pins, and is arranged on the upper end surface of the porous ceramic matrix;
the porous ceramic matrix comprises the following raw materials: 25 parts of ceramic powder, 10 parts of glass powder, 50 parts of pore-forming agent and 15 parts of binder; the ceramic powder is a mixture of quartz and diatomite, wherein the mass ratio of the quartz to the diatomite is 3:1, and the mesh number of the ceramic powder is 300 meshes; the median particle diameter of the glass powder is 1 mu m; the pore-forming agent is a mixture of carbon powder and PMMA, wherein the mass ratio of the carbon powder to the PMMA is 1:1, and the mesh number of the pore-forming agent is 150 meshes; the binder is hydroxypropyl methylcellulose.
2. A ceramic atomizing core as set forth in claim 1, wherein said ceramic atomizing core is prepared by a process comprising the steps of:
s1, mixing: weighing raw materials according to a preset mixing formula, and then placing the raw materials into a mixer to mix for a preset mixing time period to prepare powder; the raw materials for preparing the porous ceramic matrix comprise 25 parts of ceramic powder, 10 parts of glass powder, 50 parts of pore-forming agent and 15 parts of binder; the preset mixing time is 2 hours; the ceramic powder is a mixture of quartz and diatomite, wherein the mass ratio of the quartz to the diatomite is 3:1, and the mesh number of the ceramic powder is 300 meshes; the median particle diameter of the glass powder is 1 mu m; the pore-forming agent is a mixture of carbon powder and PMMA, wherein the mass ratio of the carbon powder to the PMMA is 1:1, and the mesh number of the pore-forming agent is 150 meshes; the binder is hydroxypropyl methyl cellulose;
s2, banburying: placing the powder into an open-close internal mixer, adding water into the powder according to a preset internal mixing feed liquid ratio, and carrying out internal mixing for a preset internal mixing time period to prepare pug; wherein, the preset banburying material-liquid ratio is powder (mass): water (mass) =100: 30, the preset banburying time is 2 hours;
s3, staling: placing the pug into a sealing bag, standing for a preset period of time to prepare a stale pug; wherein the preset ageing time period is 2 days;
s4, extruding: placing the stale pug into an extruder, and sequentially extruding and cutting the stale pug to prepare a strip blank;
s5, die cutting: placing the strip blank in a punch press and punching to prepare a wet blank with a required shape;
s6, drying: placing the wet blank into a drying box, and drying at a preset drying temperature to constant weight to prepare a dry blank; wherein the preset drying temperature is 100 ℃;
s7, first sintering: placing the dry blank into a box-type resistance furnace, sintering the dry blank under a preset first sintering condition, and cooling to prepare a porous ceramic matrix; wherein the preset first sintering condition is air atmosphere, the sintering temperature is 1200 ℃, and the heat preservation time is 60min;
s8, printing: placing the porous ceramic matrix in a jig, printing metal slurry on the upper end surface of the porous ceramic matrix in a screen printing mode, then placing the porous ceramic matrix in a drying oven, and drying under a preset first drying condition to prepare a matrix to be burned; wherein, the first drying condition is preset to be that the drying is carried out for 50min at 60 ℃;
s9, second sintering: placing a substrate to be sintered into an atmosphere furnace, and sintering the substrate to be sintered in a protective atmosphere under a preset second sintering condition to prepare a ceramic atomization core, wherein the size of the prepared ceramic atomization core is 10mm x 3mm; the preset second sintering condition is that the sintering temperature is 1000 ℃, the heat preservation time is 50min, and the protective atmosphere is N2.
3. A ceramic atomizing core as set forth in claim 1, wherein said porous ceramic substrate is internally provided with through holes having an average pore diameter of 50 μm and a porosity of 65%.
4. The ceramic atomizing core of claim 1, wherein the heating circuit is one or a combination of S-shaped, wave-shaped, pear-shaped, mountain-shaped;
the resistance value of the heating circuit is 0.7-3.0Ω;
the resistance value of the contact pin is less than or equal to 0.4Ω.
5. A method for preparing a ceramic atomizing core according to any one of claims 1 to 4, comprising:
s1, mixing: weighing raw materials according to a preset mixing formula, and then placing the raw materials into a mixer to mix for a preset mixing time period to prepare powder; the raw materials for preparing the porous ceramic matrix comprise 25 parts of ceramic powder, 10 parts of glass powder, 50 parts of pore-forming agent and 15 parts of binder; the preset mixing time is 2 hours; the ceramic powder is a mixture of quartz and diatomite, wherein the mass ratio of the quartz to the diatomite is 3:1, and the mesh number of the ceramic powder is 300 meshes; the median particle diameter of the glass powder is 1 mu m; the pore-forming agent is a mixture of carbon powder and PMMA, wherein the mass ratio of the carbon powder to the PMMA is 1:1, and the mesh number of the pore-forming agent is 150 meshes; the binder is hydroxypropyl methyl cellulose;
s2, banburying: placing the powder into an open-close internal mixer, adding water into the powder according to a preset internal mixing feed liquid ratio, and carrying out internal mixing for a preset internal mixing time period to prepare pug; wherein, the preset banburying material-liquid ratio is powder (mass): water (mass) =100: 30, the preset banburying time is 2 hours;
s3, staling: placing the pug into a sealing bag, standing for a preset period of time to prepare a stale pug; wherein the preset ageing time period is 2 days;
s4, extruding: placing the stale pug into an extruder, and sequentially extruding and cutting the stale pug to prepare a strip blank;
s5, die cutting: placing the strip blank in a punch press and punching to prepare a wet blank with a required shape;
s6, drying: placing the wet blank into a drying box, and drying at a preset drying temperature to constant weight to prepare a dry blank; wherein the preset drying temperature is 100 ℃;
s7, first sintering: placing the dry blank into a box-type resistance furnace, sintering the dry blank under a preset first sintering condition, and cooling to prepare a porous ceramic matrix; wherein the preset first sintering condition is air atmosphere, the sintering temperature is 1200 ℃, and the heat preservation time is 60min;
s8, printing: placing the porous ceramic matrix in a jig, printing metal slurry on the upper end surface of the porous ceramic matrix in a screen printing mode, then placing the porous ceramic matrix in a drying oven, and drying under a preset first drying condition to prepare a matrix to be burned; wherein, the first drying condition is preset to be that the drying is carried out for 50min at 60 ℃;
s9, second sintering: placing a substrate to be sintered into an atmosphere furnace, and sintering the substrate to be sintered in a protective atmosphere under a preset second sintering condition to prepare a ceramic atomization core, wherein the size of the prepared ceramic atomization core is 10mm x 3mm; the preset second sintering condition is that the sintering temperature is 1000 ℃, the heat preservation time is 50min, and the protective atmosphere is N2.
6. An atomizer comprising the ceramic atomizing core of any one of claims 1-4 or the ceramic atomizing core produced by the method of claim 5, and oil storage cotton outside of the ceramic atomizing core.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109152895A (en) * | 2016-05-31 | 2019-01-04 | 菲利普莫里斯生产公司 | The cylinder of system is generated for aerosol |
| CN113896527A (en) * | 2021-11-08 | 2022-01-07 | 刘松青 | Porous ceramic for electronic cigarette and preparation method thereof |
| CN114041628A (en) * | 2021-11-11 | 2022-02-15 | 深圳市汉清达科技有限公司 | Porous ceramic heating element and atomizer |
| CN114732171A (en) * | 2022-05-14 | 2022-07-12 | 深圳雾道科技有限公司 | Ceramic atomizing core structure and preparation method thereof |
| CN216983586U (en) * | 2021-12-13 | 2022-07-19 | 深圳市合元科技有限公司 | Heater and smoking set comprising same |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109152895A (en) * | 2016-05-31 | 2019-01-04 | 菲利普莫里斯生产公司 | The cylinder of system is generated for aerosol |
| CN113896527A (en) * | 2021-11-08 | 2022-01-07 | 刘松青 | Porous ceramic for electronic cigarette and preparation method thereof |
| CN114041628A (en) * | 2021-11-11 | 2022-02-15 | 深圳市汉清达科技有限公司 | Porous ceramic heating element and atomizer |
| CN216983586U (en) * | 2021-12-13 | 2022-07-19 | 深圳市合元科技有限公司 | Heater and smoking set comprising same |
| CN114732171A (en) * | 2022-05-14 | 2022-07-12 | 深圳雾道科技有限公司 | Ceramic atomizing core structure and preparation method thereof |
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