CN117882895A

CN117882895A - Humidity-sensitive ceramic atomizing core and preparation method thereof

Info

Publication number: CN117882895A
Application number: CN202311762682.5A
Authority: CN
Inventors: 吴孟熊; 黎飞龙; 陈二伟
Original assignee: Shenzhen Woody Vapes Technology Co Ltd
Current assignee: Shenzhen Woody Vapes Technology Co Ltd
Priority date: 2023-12-20
Filing date: 2023-12-20
Publication date: 2024-04-16

Abstract

The application discloses a humidity-sensitive ceramic atomizing core and preparation method thereof, wherein the humidity-sensitive ceramic atomizing core includes: a body having micro-holes for containing a liquid; wherein, the body includes: a matrix component, a moisture sensitive component, and a conductive component; the matrix component is formed by sintering ceramic materials; the humidity sensitive component is formed by sintering a humidity sensitive material; the conductive component is formed by sintering conductive materials; the moisture sensitive material has electrical conductivity properties intermediate between those of the conductive material and the ceramic material. The wet-sensitive ceramic atomization core has the advantages of being capable of preventing dry combustion and still being used normally when wettability is insufficient, and the preparation method of the wet-sensitive ceramic atomization core.

Description

Humidity-sensitive ceramic atomizing core and preparation method thereof

Technical Field

The application relates to the technical field of ceramics, in particular to porous ceramics and a preparation method thereof.

Background

In the related art, a material blank is formed by directly mixing a binder, a pore-forming agent and a main material, and then the material blank is sintered to prepare porous ceramics, and the porous ceramics are structurally provided with a plurality of micropores for containing liquid to be atomized, are commonly used as atomizing cores in some atomizers, and generate smoke after being heated by an electric heating film attached to the atomizing cores for users to take.

When the liquid to be atomized is consumed at the atomization core, the atomization core and the heating film are insufficient in wettability, so that the atomization core and the heating film are heated seriously, dry burning phenomenon is generated, local overheating is possibly caused, and the problems of film breakage, film warping, core pasting and the like are solved, so that the service life of the atomization core is seriously influenced.

In the related art, chinese patent publication No. CN112830773a discloses a humidity-sensitive porous ceramic, an atomization core, and a method for preparing the same, which can be rapidly detected when humidity of the atomization core is reduced by adding a humidity-sensitive material into a ceramic material, so that power can be reduced or power can be turned off, and dry burning probability of the atomization core can be reduced. But this scheme can influence the circular telegram of atomizing core even make atomizing core outage when liquid content is less, and atomizing core just can not normally use this moment, has restricted the normal use of atomizing core to a certain extent.

Disclosure of Invention

In view of the above, the present application provides a humidity-sensitive ceramic atomizing core, which aims to solve the problems that the existing ceramic atomizing core is easy to dry burn and has a short service life.

Embodiments of the present application are thus implemented, a humidity-sensitive ceramic atomizing core, comprising: a body having micro-holes for containing a liquid; wherein, the body includes: a matrix component, a moisture sensitive component, and a conductive component; the matrix component is formed by sintering ceramic materials; the humidity sensitive component is formed by sintering a humidity sensitive material; the conductive component is formed by sintering conductive materials; the moisture sensitive material has electrical conductivity properties intermediate between those of the conductive material and the ceramic material.

In some embodiments, the conductive material comprises one or more of elemental metal, a mixture of metals, and graphite.

In some embodiments, the ceramic material comprises one or more of alpha-alumina powder, kaolin, diatomaceous earth, sodium silicate.

In some embodiments, the moisture sensitive material includes one or more of magnesia chrome sand, alumina powder, tantalum pentoxide, ferric oxide, and zinc oxide.

In some embodiments, the mass ratio of the conductive component to the moisture sensitive component ranges from 1 to 10.

In some embodiments, the mass ratio of the matrix component to the conductive component ranges from 2 to 10.

Correspondingly, the embodiment of the application also provides a preparation method of any one of the moisture-sensitive ceramic atomizing cores, which comprises the following steps:

providing an injection molding feed required for green body injection molding of the body; injecting the injection feed into an injection mold to obtain a green body of the body; sintering the green body of the body to obtain the body; wherein the injection molding feed comprises a ceramic material, a humidity sensitive material and a conductive material; the moisture sensitive material has electrical conductivity properties intermediate between those of the conductive material and the ceramic material.

In some embodiments, providing an injection molding feed required for green injection molding of a body comprises: pretreating one or more of the raw materials of the ceramic material, the humidity-sensitive material and the conductive material; the pretreatment comprises one or more of cleaning, drying and sieving.

In some embodiments, the starting material for the conductive material is a powder; the pretreatment of one or more of the raw materials of the ceramic material, the humidity-sensitive material and the conductive material comprises the following steps: placing the raw materials of the conductive material into a cleaning agent for ultrasonic cleaning for a preset cleaning time period; filtering and separating the raw materials of the conductive material and the cleaning agent to obtain the raw materials of the cleaned conductive material; drying the cleaned raw materials of the conductive material at a first preset temperature for a first drying period, and cooling to room temperature.

In some embodiments, the raw material of the moisture sensitive material is a powder; the pretreatment of one or more of the raw materials of the ceramic material, the humidity-sensitive material and the conductive material comprises the following steps: presintering the raw materials of the humidity-sensitive material at a second preset temperature to obtain the presintered raw materials of the humidity-sensitive material; and (3) screening the raw materials of the pre-sintered moisture-sensitive material with a preset mesh number to obtain the raw materials of the moisture-sensitive material after screening.

The wet-sensitive ceramic atomization core has the advantages of being capable of preventing dry combustion and still being used normally when wettability is insufficient, and the preparation method of the wet-sensitive ceramic atomization core.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic block diagram of main steps of a method for preparing a humidity sensitive ceramic provided in an embodiment of the present application;

FIG. 2 is a schematic block diagram of some steps of a method for preparing a humidity sensitive ceramic provided in an embodiment of the present application;

fig. 3 is a graph showing the trend of resistance change after smoke oil is adsorbed by the humidity-sensitive ceramic atomization core according to the embodiment of the application.

Fig. 4 is a graph showing the trend of resistance change after smoke oil is adsorbed by the second humidity-sensitive ceramic atomization core according to the embodiment of the application.

Detailed Description

The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all, of the embodiments of the present application. All other embodiments, based on the embodiments herein, which are obtained by a person skilled in the art without making any inventive effort, are intended to be within the scope of the present application. Furthermore, it should be understood that the detailed description is presented herein for purposes of illustration and explanation only and is not intended to limit the present application.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein 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. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

In this application, unless otherwise indicated, terms of orientation such as "upper" and "lower" are used to generally refer to the upper and lower positions of the device in actual use or operation, and specifically the orientation of the drawing figures; while "inner" and "outer" are for the outline of the device. In addition, in the description of the present application, the term "comprising" means "including but not limited to". The terms first, second, third and the like are used merely as labels, and do not impose numerical requirements or on the order of construction.

In the present application, "and/or" describing the association relationship of the association object means that there may be three relationships, for example, a and/or B may mean: a alone, a and B together, and B alone. Wherein A, B may be singular or plural.

In this application, "at least one" means one or more, and "a plurality" means two or more. "one or more," "at least one of the following," or the like, refer to any combination of these items, including any combination of single item(s) or plural items(s). For example, "at least one (individual) of a, b, or c," or "at least one (individual) of a, b, and c," may each represent: a, b, c, a-b (i.e., a and b), a-c, b-c, or a-b-c, wherein a, b, c may be single or multiple, respectively.

Various embodiments of the present application may exist in a range format; it should be understood that the description in a range format is merely for convenience and brevity and should not be interpreted as a rigid limitation on the scope of the application. It is therefore to be understood that the range description has specifically disclosed all possible sub-ranges and individual values within that range. For example, it should be considered that a description of a range from 1 to 6 has specifically disclosed sub-ranges, such as from 1 to 3, from 1 to 4, from 1 to 5, from 2 to 4, from 2 to 6, from 3 to 6, etc., as well as single numbers within the range, such as 1, 2, 3, 4, 5, and 6, wherever applicable. In addition, whenever a numerical range is referred to herein, it is meant to include any reference number (fractional or integer) within the indicated range.

The technical scheme of the application is as follows:

in a first aspect, embodiments of the present application provide a humidity-sensitive ceramic atomizing core comprising: a body having micro-pores for containing a liquid. Wherein, the body includes: a matrix component, a moisture sensitive component, and a conductive component.

In a specific scheme, the matrix component is formed by sintering a ceramic material, and in an alternative scheme, the ceramic material is specifically ceramic skeleton powder.

Correspondingly, the moisture-sensitive component is formed by sintering a moisture-sensitive material. By doping the humidity-sensitive material into the body, the humidity-sensitive ceramic atomizing core can have different conductivities when the humidity-sensitive ceramic atomizing core is soaked by the liquid to be atomized, the residual quantity of the liquid to be atomized can be determined by detecting the conductivities of the humidity-sensitive ceramic atomizing core, and then the possibility of dry burning of the humidity-sensitive ceramic atomizing core is reduced by adjusting the electric quantity of the heating film combined on the humidity-sensitive ceramic atomizing core and/or the humidity-sensitive ceramic atomizing core.

On the basis, the conductive component is sintered by the conductive material, namely, compared with a common ceramic product, the moisture-sensitive ceramic atomizing core can conduct electricity by doping the conductive material into the body. Further, the conductive properties of the moisture sensitive material forming the moisture sensitive component are intermediate between the ceramic material and the conductive material forming the conductive component. Those skilled in the art will appreciate that the conductivity of a material may be characterized by its resistance, conductivity, etc. parameters, and will not be described in detail herein.

By adopting the scheme, on one hand, by adding the humidity-sensitive material, when the consumption of the liquid to be atomized leads to insufficient wettability of the humidity-sensitive ceramic atomizing core, the electric heating power can be further controlled by detecting the conductivity, the resistance and the like of the humidity-sensitive ceramic atomizing core. On the other hand, the addition of the conductive material can also ensure that the humidity-sensitive ceramic atomizing core has conductive capacity, and parameters such as conductivity, resistance and the like of the humidity-sensitive ceramic atomizing core change along with the infiltration condition of the humidity-sensitive ceramic atomizing core. Therefore, when the wettability of the humidity-sensitive ceramic atomizing core is insufficient, the humidity-sensitive ceramic atomizing core can still conduct electricity, so that the humidity-sensitive ceramic atomizing core can be used normally to heat and atomize liquid to be atomized, and the amount of smoke generated in the process from the beginning to the end of atomization is relatively uniform.

It can be understood that, for detecting the conductivity and the resistance of the humidity-sensitive ceramic atomizing core, a person skilled in the art can realize the detection of the conductivity and the resistance of the humidity-sensitive ceramic atomizing core by externally connecting a detection circuit to the humidity-sensitive ceramic atomizing core or externally connecting a detection circuit to a heating film combined on the humidity-sensitive ceramic atomizing core on the basis that the humidity-sensitive ceramic atomizing core has the conductivity, or specifically, can measure the conductivity of the humidity-sensitive ceramic atomizing core by measuring the resistance value of the humidity-sensitive ceramic atomizing core. The configuration mode of the detection circuit is not the direction improved by the technical scheme, and a person skilled in the art can specifically configure the detection circuit according to actual situations, so that the structure and the principle of the detection circuit are not repeated here.

It should be noted that, compared with common ceramics, the humidity-sensitive ceramic atomizing core provided by the application has the conductivity, so that the humidity-sensitive ceramic atomizing core can be further not combined with a heating film, and in the prior art, in order to ensure the combination stability of the humidity-sensitive ceramic atomizing core and the heating film, the requirements of a processing technology for combining the atomizing core and the heating film are high. Therefore, the scheme can also reduce the manufacturing difficulty of the atomization device.

In a specific scheme, the conductive material comprises one or more of metal simple substance, metal mixture and graphite. For example, the conductive material may be conductive powder, i.e., a powder material is used as the conductive material. The conductive powder can be at least one of flake graphite, silver powder, silver-coated copper, silver-coated nickel or nickel powder.

In an alternative embodiment, the conductive material includes one or more of a simple metal and a metal mixture. For example, the conductive material may be at least one of silver powder, silver-coated copper, silver-coated nickel, or nickel powder. The metal simple substance or the metal mixture is used as the conductive material, so that the formed humidity-sensitive ceramic atomizing core can conduct electricity, and meanwhile, as the microstructure of the metal simple substance and the metal mixture is more compact compared with that of the conventional ceramic material, the powder falling phenomenon caused by loose materials in the use process of the humidity-sensitive ceramic atomizing core can be reduced compared with that of the ceramic atomizing core made of the conventional ceramic.

In some embodiments, the ceramic material may be a ceramic skeletal powder. For example, the ceramic material may be one or more of alpha-alumina powder, kaolin, diatomaceous earth, sodium silicate.

In some embodiments, the range of values for the mass percent of ceramic material in the bulk feed component includes 40% to 60%, e.g., 40% to 45%, 45% to 50%, 50% to 55%, 55% to 60%,60% to 69%, etc. of the mass percent of ceramic material in the bulk feed component.

In some embodiments, the conductive material is present in the bulk raw material composition in a range of values from 5% to 25% by mass. For example, the mass percent of the conductive material in the bulk raw material component may be 5% to 10%, 10% to 15%, 15% to 20%,20% to 25%, etc.

In some embodiments, the moisture sensitive material has a mass percent value in the bulk raw material component ranging from 2% to 5%. For example, the mass percent of the conductive material in the bulk raw material composition may be 2%, 3%, 4%,5%, etc.

It should be noted that, although the addition of the conductive material can enhance the use performance of the humidity-sensitive ceramic atomizing core in the body, when the amount of the conductive material to be added is too large, that is, when the mass ratio of the conductive component to the matrix component is too high, the characteristics of the humidity-sensitive ceramic atomizing core itself brought by the ceramic material will be suppressed. For example, ceramic materials are capable of forming a porous structure upon addition of a pore former, and excessive inhibition of this property would limit the ability of the moisture-sensitive ceramic atomizing core to contain liquid, potentially resulting in overheating of the moisture-sensitive ceramic atomizing core during use. And when the consumption of the conductive material is too small, the self conductivity of the humidity-sensitive ceramic atomizing core is inhibited.

In some embodiments, the mass ratio of the matrix component to the conductive component can range from 2 to 10. For example, the range of the mass ratio of the matrix component to the conductive component is selected to be 2 to 5, 5 to 8,8 to 10, etc. as required. By limiting the mass ratio of the matrix component to the conductive component, the conductivity and the liquid containing capacity of the humidity-sensitive ceramic atomizing core can be ensured to meet the use requirements.

In some embodiments, the mass ratio of the conductive component to the moisture sensitive component can range from 1 to 10. For example, the mass ratio of the conductive component to the moisture sensitive component may range from 1 to 3, 3 to 6, 6 to 8,8 to 10, etc.

It can be understood that the body can also consider adding raw material components such as pore formers, adhesives, performance aids, organic solvents and the like in the preparation process, so that the humidity-sensitive ceramic atomizing core can meet the use requirements of porosity, higher strength and the like.

Specifically, the pore-forming agent comprises at least one of saw dust, coal dust, perlite, urea, ammonium carbonate, starch and polyvinyl chloride, and the mass percentage of the pore-forming agent in the raw material components of the humidity-sensitive ceramic atomizing core is 15-35%.

Specifically, the binder comprises at least one of paraffin wax, tung oil, methyl cellulose, ethyl cellulose and polyethylene, and the mass percentage of the binder in the raw material components of the humidity-sensitive ceramic atomizing core can be 2-8%.

Specifically, the dispersing agent comprises at least one of stearic acid, polyvinylpyrrolidone and polyacrylic acid, and the mass percentage of the dispersing agent in the raw material components of the humidity-sensitive ceramic atomizing core is 0.5-2%.

Specifically, the organic solvent comprises at least one of polyethylene glycol and terpineol, and the mass percentage of the organic solvent in the raw material components of the humidity-sensitive ceramic atomizing core is 2-10%.

Specifically, the performance auxiliary agent comprises at least one of niobium oxide, calcium carbonate, potassium oxide, boron nitride, hafnium oxide and nano zirconium dioxide, and the mass percentage of the performance auxiliary agent in the raw material components of the humidity-sensitive ceramic atomizing core is 1-5%.

In some embodiments, the mass percentages of the raw material components at the time of manufacture of the humidity-sensitive ceramic atomizing core are set with reference to table 1 below.

TABLE 1

Component (A)

Ceramic material

Conductive material

Moisture sensitive material

Pore-forming agent

Adhesive agent

Dispersing agent

Performance aids

Organic solvents

Addition ratio of

40 to 69%

5% to 25%

2% to 5%

15 to 35%

2% to 8%

0.5 to 2%

1% to 5%

2% to 10%

Referring to fig. 1, correspondingly, the embodiment of the application also provides a preparation method of the humidity-sensitive ceramic atomization core, which mainly comprises the following steps:

s101, providing injection molding feed required by green body injection molding of a body;

s102, injecting injection molding feed into an injection mold to obtain a green body of the body;

and S103, sintering the green body of the body to obtain the body.

As a specific scheme, in step S101, the injection molding feed includes a ceramic material, a moisture sensitive material, and a conductive material; wherein the moisture sensitive material has an electrical conductivity between that of the conductive material and that of the ceramic material.

In the process of preparing the humidity-sensitive ceramic atomizing core, the prepared humidity-sensitive ceramic atomizing core has conductivity by adding the humidity-sensitive material and the conductive material, and parameters such as conductivity, resistance and the like of the humidity-sensitive ceramic atomizing core change along with the infiltration condition of the humidity-sensitive ceramic atomizing core. In general, the moisture sensitive material and the conductive material are added so that the moisture sensitive ceramic atomizing core has a conductivity that increases as the degree of wetting by the atomized liquid increases, so that the ceramic atomizing core of the present application has a certain conductive property even when the degree of wetting of the moisture sensitive ceramic atomizing core decreases to a certain degree. It should be noted that, this preparation method can make the atomizing core have the electric conduction ability to when the atomizing device of follow-up production, need not to combine the heating film on the atomizing core, further reduced the manufacturing degree of difficulty of atomizing device.

Specifically, in step S101, ceramic material, i.e., ceramic skeleton powder, is provided.

As a further alternative, the ceramic skeleton powder may be at least one of alpha-alumina powder, kaolin, diatomaceous earth, sodium silicate.

As a specific scheme, the ceramic skeleton powder comprises 40 to 69% by mass of the main body preparation raw material, and as a specific option, for example, the ceramic skeleton powder can be provided with 50% by mass.

Specifically, in step S101, the raw material of the conductive material is provided in a powder form. As a further alternative, for example, the conductive powder is at least one of flake graphite, silver powder, silver-coated copper, silver-coated nickel, or nickel powder.

As a specific scheme, the conductive material accounts for 5 to 25 mass percent of the main body preparation raw material. As a further alternative, for example, 22% by mass of the conductive powder is provided.

Specifically, in step S101, the raw material of the provided humidity-sensitive material is in a powder form. As a further alternative, for example, the moisture sensitive powder may be at least one of magnesia chrome sand, alumina powder, tantalum pentoxide, ferroferric oxide, and zinc oxide.

As a further alternative, the moisture sensitive powder provided comprises 2 to 5% by mass of the bulk preparation raw material. As a specific option, for example, the moisture sensitive powder is provided with a mass percentage of 3%.

Alternatively, the injection molding feed further comprises a pore former. When specifically selected, the pore-forming agent can be at least one of saw dust, coal dust, perlite, urea, ammonium carbonate, starch and polyvinyl chloride. The mass percentage of the pore-forming agent to the raw material for preparing the body can be selected according to actual needs, for example, the mass percentage of the pore-forming agent to the raw material for preparing the body is 15-35%.

Referring to fig. 2, in a specific embodiment, in step S101, the method includes: pretreating one or more of the raw materials of the ceramic material, the humidity-sensitive material and the conductive material; the pretreatment comprises one or more of cleaning, drying and sieving.

As a further alternative, the pretreatment of one or more of the raw materials of the ceramic material, the moisture sensitive material and the conductive material includes: placing the raw materials of the conductive material into a cleaning agent for ultrasonic cleaning for a preset cleaning time period; filtering and separating the raw materials of the conductive material and the cleaning agent to obtain the raw materials of the cleaned conductive material; drying the cleaned raw materials of the conductive material at a first preset temperature for a first drying period, and cooling to room temperature.

As a specific option, the raw materials of the conductive material are placed in a cleaning agent and ultrasonically cleaned for a preset cleaning time period, and the preset cleaning time period can be 0.5 hour to 2 hours. The cleaning agent used may be dilute hydrochloric acid with a concentration of 0.5% to 3%, and may be further subjected to calcination and surface modification treatment after cleaning with dilute hydrochloric acid. After washing with dilute hydrochloric acid, the washing can be performed with alcohol for 0.5 to 2 hours.

As a further alternative, taking the conductive material as a powder (hereinafter referred to as "conductive powder") as an example, the process of further performing the surface modification treatment after washing with dilute hydrochloric acid may be: dissolving a proper amount of stearic acid particles by using alcohol, wherein the mass of stearic acid is 2-3% of that of the conductive powder; heating in water bath, adding conductive material after stearic acid is completely dissolved, and reacting for 2-3 hours by using a condensation circulator; and after the reaction is finished, filtering, cleaning and drying are carried out to obtain the modified conductive powder so as to improve the dispersibility of the modified conductive powder.

As a specific option, the cleaned raw material of the conductive material is dried at a first preset temperature for a first drying period, and then cooled to room temperature, wherein the first preset temperature may be set to 50 ℃ to 80 ℃, and the first drying period may be 0.5 to 2 hours.

As a further alternative, the pretreatment of one or more of the raw materials of the ceramic material, the moisture sensitive material and the conductive material includes: presintering the raw materials of the humidity-sensitive material at a second preset temperature to obtain the presintered raw materials of the humidity-sensitive material; and (3) screening the raw materials of the pre-sintered moisture-sensitive material with a preset mesh number to obtain the raw materials of the moisture-sensitive material after screening.

As a specific option, the second preset temperature may be 300 ℃ to 450 ℃.

Alternatively, the predetermined mesh number may be 400 mesh to 500 mesh, for example, the predetermined mesh number may be 450 mesh.

As a further alternative, the pretreatment of one or more of the raw materials of the ceramic material, the moisture sensitive material and the conductive material includes: and drying the raw materials of the ceramic material at a third preset temperature for a third drying period, and cooling to room temperature.

As a specific option, the third preset temperature may be 90 ℃ to 110 ℃.

As a specific option, the third drying period may be 3 hours to 6 hours.

As a specific scheme, when the ceramic material is dried at a third preset temperature for a third drying period and then cooled to room temperature, adding the pore-forming agent into the ceramic material, and then drying the ceramic material.

As a specific scheme, step S102 includes:

weighing and proportioning the pretreated solid powder according to the mass ratio;

the dried conductive powder, the humidity-sensitive powder, the ceramic skeleton powder and the performance auxiliary agent are sequentially and uniformly mixed with a grinder through a three-dimensional mixer to obtain mixed powder;

weighing the binder, the dispersing agent and the organic solvent;

sequentially adding the weighed adhesive, the dispersant and the organic solvent into a kneading mixer, kneading and stirring for 0.5 to 2 hours, adding the mixed powder, and kneading for 2 to 12 hours to obtain a kneaded material;

and standing and cooling the kneaded material, granulating by using a granulator, and performing injection molding by using the granulated granules by using an injection molding machine.

As a specific option, the performance auxiliary comprises at least one of niobium oxide, calcium carbonate, potassium oxide, boron nitride, hafnium oxide and nano zirconium dioxide. The mass percentage of the performance auxiliary content in the raw material components of the humidity-sensitive ceramic atomizing core can be 1-5%.

As a specific option, the binder includes at least one of paraffin wax, tung oil, methylcellulose, ethylcellulose, and polyethylene, and the content of the binder may be 2% to 8% by mass in the raw material components of the humidity-sensitive ceramic atomizing core.

As a specific option, the dispersant includes at least one of stearic acid, polyvinylpyrrolidone (hereinafter referred to as "PVP"), and polyacrylic acid, and the dispersant may be 0.5% to 2% by mass in the raw material components of the humidity-sensitive ceramic atomizing core.

As a specific option, the organic solvent includes at least one of polyethylene glycol and terpineol, and the mass percentage of the organic solvent in the raw material component of the humidity-sensitive ceramic atomizing core may be 2% to 10%.

As a specific scheme, step S103 includes:

burying powder in the formed green body, and performing catalytic degreasing by using a nitrogen atmosphere catalytic furnace;

sintering in a reducing atmosphere at 1000-1300 ℃ to obtain a body.

The following is a brief description of several specific examples of the use of the above preparation method to make a humidity sensitive ceramic atomizing core:

embodiment one: the preparation method of the humidity-sensitive ceramic atomizing core in the embodiment is as follows:

weighing 150g of spherical nickel powder (D90=1000 meshes, the purity is 99 percent, namely, in a powder sample, at least 90 percent of spherical nickel powder particles have the particle size smaller than or equal to 1000 meshes), soaking for 1 hour by using pre-prepared dilute hydrochloric acid with the concentration of 1.5 percent, filtering, cleaning and drying, weighing 30g of stearic acid, dissolving in alcohol, then adding nickel powder, and reacting for 2 hours in a water bath at the constant temperature of 80 ℃; after the reaction product is pumped, filtered and washed, the reaction product is put into a drying furnace to be dried for 1 hour at 65 ℃, and 180g of modified nickel powder can be obtained after the reaction product is cooled and weighed, and the reaction product is put for standby; the required moisture-sensitive powder magnesium chrome sand and zinc oxide powder are subpackaged in a muffle furnace, presintering is carried out for 4 hours at 400 ℃, cooling is carried out, screening is carried out by a 450-mesh screen, the undersize is taken out, and 20g of magnesium chrome sand and 10g of zinc oxide powder are weighed for standby;

(2) According to the mass percentage, respectively weighing 180g of diatomite, 200g of kaolin, 40g of sodium silicate, 200g of perlite, 10g of niobium oxide and 5g of hafnium oxide, 5g of nano zirconium dioxide, putting the materials into a 90 ℃ oven for drying for 3 hours after weighing, cooling and taking out, mixing the materials with the conductive powder and the humidity-sensitive powder which are treated before, fully mixing the materials by a double-planetary mixer and a grinder in sequence, and standing for standby; adding 20g of polyethylene, 30g of paraffin, 10g of polyacrylic acid and 80g of polyethylene glycol into a kneader, banburying at 95 ℃ until the sizing material is free of particles, adding the ground ceramic material, continuously kneading for 6 hours, standing and cooling, and then granulating in a ceramic granulator to obtain the granular moisture-sensitive ceramic feed with uniform size.

(3) The ceramic raw body is obtained by feeding ceramic through an injection molding process, and the process parameters are as follows: the molding pressure was 35bar and the speed was 35cm ³ And/s, wherein the injection temperature is 95 ℃, and the mold temperature is 26 ℃, so as to obtain the ceramic green body.

(4) Placing the ceramic green compact in a sagger, covering with alumina powder, placing in a nitrogen atmosphere catalytic furnace, degreasing according to a specific degreasing curve, and preserving heat, wherein the highest temperature in the degreasing process is 550 ℃, and preserving heat for 2 hours;

(5) And (3) degreasing, then placing the ceramic core into a reducing atmosphere sintering furnace, heating and sintering according to a specific curve, wherein the highest temperature in the sintering process is 1150 ℃, preserving heat for 2 hours, and cooling to room temperature along with the furnace to obtain the humidity-sensitive ceramic atomization core.

(6) The average porosity of the humidity-sensitive ceramic atomized cores was measured using a porous density analyzer, the average pore diameter of the humidity-sensitive ceramic atomized cores was measured using a pore diameter analyzer, and the compressive strength of the humidity-sensitive ceramic atomized cores was measured using a flat pressure tester, and the performance parameters of the prepared humidity-sensitive ceramic atomized cores were measured as shown in table 2.

TABLE 2

Average porosity of	Average pore diameter	Compressive Strength
			45.68％	16.3um	35MPa

(7) The prepared single humidity-sensitive ceramic atomizing core is weighed, the mass of the single humidity-sensitive ceramic atomizing core is 0.2103g, the total mass of the single humidity-sensitive ceramic atomizing core after water-based tobacco tar is completely adsorbed is 0.2633g, and the tobacco tar filling rate is 100%. And then, by adopting the following formula to calculate, repeating the preparation operation to obtain a plurality of humidity-sensitive ceramic atomizing cores, and enabling each humidity-sensitive ceramic atomizing core to adsorb water-based tobacco tar with different qualities, the plurality of humidity-sensitive ceramic atomizing cores with tobacco tar filling rates of 0%, 50%, 75% and 100% can be obtained:

(mass of moisture-sensitive ceramic atomization core after adsorbing tobacco tar M-initial weight of moisture-sensitive ceramic atomization core)/tobacco tar mass at 100% of tobacco tar filling rate (i.e. 0.0530 g) =tobacco tar filling rate of moisture-sensitive ceramic atomization core.

The resistance of each humidity-sensitive ceramic atomizing core with different tobacco tar filling rates was tested by using a multimeter, then the humidity-sensitive ceramic atomizing cores were placed in a petri dish, the humidity-sensitive ceramic atomizing cores were turned on by using a direct current electronic load electrode, the output power was controlled at 6W, an atomization simulation test was performed, and the resistance of the humidity-sensitive ceramic atomizing cores was detected by using a multimeter, and the test data are shown in table 3.

TABLE 3 Table 3

Referring to fig. 3, a graph showing the trend of the resistance change after the smoke oil is adsorbed by the humidity-sensitive ceramic atomizing core according to the present example is shown.

Wherein the abscissa of the graph represents the filling rate of the humidity-sensitive ceramic atomizing core when the humidity-sensitive ceramic atomizing core is impregnated with tobacco tar (also including in a heated state), the difference can reflect the content change of the liquid stored in the micropores, and the ordinate is the resistance value of the humidity-sensitive ceramic atomizing core at the corresponding tobacco tar filling rate. As can be seen from fig. 3, even when the tobacco tar filling rate is reduced to a certain extent, the ceramic atomization core of the present application still has a certain conductive performance, so that atomization can be performed to a certain extent under the condition of ensuring no dry combustion, and thus the atomization effect can be further ensured to be the same as the effect before liquid reduction by means of increasing voltage and/or current, so as to satisfy the humidity-sensitive dry combustion preventing effect and the requirement of consistency before and after atomization.

Embodiment two: the preparation method of the humidity-sensitive ceramic atomizing core in the embodiment is as follows:

(1) Weighing 100g of silver-coated nickel powder (D90=400 meshes, purity 99%) by mass percent, soaking for 0.5 hour by using pre-prepared 0.5% concentration dilute hydrochloric acid, carrying out suction filtration, cleaning and drying, weighing 20g of stearic acid, dissolving in alcohol, putting the silver-coated nickel powder into the alcohol, carrying out water bath constant temperature reaction for 1.5 hours at 80 ℃, carrying out suction filtration, cleaning, putting the silver-coated nickel powder into a drying furnace, drying for 0.5 hour at 70 ℃, cooling, weighing and obtaining 120g of modified silver-nickel powder, and standing for later use; and (3) sub-packaging a proper amount of required wet sensitive powder tantalum pentoxide and ferroferric oxide powder into a muffle furnace, presintering for 3 hours at 350 ℃, cooling, taking out, sieving with a 450-mesh sieve, and weighing 13g of tantalum pentoxide powder and 12g of ferroferric oxide powder for later use after taking out the sieved substance.

(2) Respectively weighing 150g of alpha-alumina powder, 230g of diatomite, 125g of sodium silicate, 85g of saw dust and starch, 15g of boron oxide, 7.5g of potassium oxide and 7.5g of nano zirconium dioxide according to mass percent, putting the materials into a 90 ℃ oven for drying for 3 hours after weighing, cooling and taking out, mixing the materials with the conductive powder and the humidity-sensitive powder which are treated before, fully mixing the materials by a double-planetary mixer and a grinder in sequence, and standing for standby; adding 20g of polyethylene, 30g of methylcellulose, 20g of PVP and 80g of terpineol into a kneader, banburying at 90 ℃ until the sizing material is free of particles, adding the ground ceramic material, continuously kneading for 4 hours, standing and cooling, and granulating in a ceramic granulator to obtain the granular humidity-sensitive ceramic feed with uniform size.

(3) The ceramic raw body is obtained by feeding ceramic through an injection molding process, and the process parameters are as follows: the molding pressure was 20bar and the speed was 20cm ³ And/s, wherein the injection temperature is 100 ℃, the mold temperature is 26 ℃, and the ceramic green body is obtained.

(4) Placing the ceramic green compact in a sagger, covering with alumina powder, placing in a nitrogen atmosphere catalytic furnace, degreasing according to a specific degreasing curve, and preserving heat for 2 hours at a maximum temperature of 550 ℃.

(5) Placing the ceramic powder into a reducing atmosphere sintering furnace after degreasing, heating up and sintering according to a specific curve, preserving heat, wherein the highest temperature in the sintering process is 1150 ℃, preserving heat for 2 hours, and cooling to room temperature along with the furnace to obtain the humidity-sensitive ceramic atomizing core;

(6) The average porosity of the humidity-sensitive ceramic atomized cores was measured using a porous density analyzer, the average pore size of the humidity-sensitive ceramic atomized cores was measured using a pore size analyzer, and the compressive strength of the humidity-sensitive ceramic atomized cores was measured using a flat pressure tester, and the performance parameters of the humidity-sensitive ceramic atomized cores were measured as shown in table 4.

TABLE 4 Table 4

Average porosity of	Average pore diameter	Compressive Strength
			48.74％	15.6um	32.5MPa

(7) The prepared single humidity-sensitive ceramic atomizing core is weighed, the mass is 0.2235g, the mass of the humidity-sensitive ceramic atomizing core after the water-based tobacco tar is completely adsorbed is 0.2753g, and the tobacco tar filling rate is 100%. And then, by adopting the following formula to calculate, repeating the preparation operation to obtain a plurality of humidity-sensitive ceramic atomizing cores, and enabling each humidity-sensitive ceramic atomizing core to adsorb water-based tobacco tar with different qualities, the plurality of humidity-sensitive ceramic atomizing cores with tobacco tar filling rates of 0%, 50%, 75% and 100% can be obtained:

(mass of moisture-sensitive ceramic atomization core after adsorbing tobacco tar M-initial weight of moisture-sensitive ceramic atomization core M)/tobacco tar filling rate when the tobacco tar mass is 100% (i.e. 0.0518 g) =tobacco tar filling rate of moisture-sensitive ceramic atomization core.

The resistance values of the humidity-sensitive ceramic atomizing cores are measured respectively by using a universal meter, then the humidity-sensitive ceramic atomizing cores are placed in a culture dish respectively, the humidity-sensitive ceramic atomizing cores are connected by using a direct current electronic load electrode, the output power is controlled at 6W, an atomization simulation test is carried out, the resistance values of the humidity-sensitive ceramic atomizing cores are detected by using the universal meter, and the test data are shown in table 5.

TABLE 5

Referring to fig. 4, a graph of the trend of the resistance change of the humidity-sensitive ceramic atomized core prepared in this example after absorbing tobacco tar is shown.

Wherein the abscissa of the graph represents the filling rate of the humidity-sensitive ceramic atomizing core when the humidity-sensitive ceramic atomizing core is impregnated with tobacco tar (also including in a heated state), the difference can reflect the content change of the liquid stored in the micropores, and the ordinate is the resistance value of the humidity-sensitive ceramic atomizing core at the corresponding tobacco tar filling rate. As can be seen from fig. 4, even when the tobacco tar filling rate is reduced to a certain extent, the ceramic atomization core of the present embodiment still has a certain conductive performance, so that atomization can be performed to a certain extent under the condition of ensuring no dry combustion, and thus the atomization effect can be further ensured to be the same as the effect before liquid reduction by increasing the voltage and/or current, so as to satisfy the requirements of humidity-sensitive dry combustion prevention effect and consistency before and after atomization.

Embodiment III:

this example is a comparative example, which is a method for producing a humidity-sensitive ceramic in which a raw material does not contain a conductive material, and is specifically as follows:

(1) Weighing a proper amount of required wet sensitive powder tantalum pentoxide and ferroferric oxide powder according to mass percent, subpackaging, putting into a muffle furnace, presintering for 3 hours at 350 ℃, cooling, taking out, sieving by a 450-mesh sieve, taking out the undersize, and weighing 13g of tantalum pentoxide powder and 12g of ferroferric oxide powder for later use.

(2) According to the mass percentage, respectively weighing 150g of alpha-alumina powder, 230g of diatomite, 125g of sodium silicate, 85g of pore-forming agent sawdust and starch, 15g of boron oxide, 7.5g of potassium oxide and 7.5g of nano zirconium dioxide, putting the materials into a 90 ℃ oven for drying for 3 hours after weighing, cooling and taking out, mixing with the wet sensitive powder treated before, fully mixing with a double-planetary mixer and a grinder in sequence, and standing for standby; adding 20g of polyethylene, 30g of methylcellulose, 20g of PVP and 60g of terpineol into a kneader, banburying at 90 ℃ until the sizing material is free of particles, adding the ground ceramic material, continuously kneading for 4 hours, standing and cooling, and granulating in a ceramic granulator to obtain the granular humidity-sensitive ceramic feed with uniform size.

(3) The ceramic raw body is obtained by feeding ceramic through an injection molding process, and the process parameters are as follows: the molding pressure was 15bar and the speed was 15cm ³ And/s, wherein the injection temperature is 100 ℃, the mold temperature is 26 ℃, and the ceramic green body is obtained.

(5) And (3) degreasing, then placing the ceramic into a reducing atmosphere sintering furnace, heating up and sintering according to a specific curve, preserving heat, keeping the temperature at 1150 ℃ in the sintering process for 2 hours, and cooling to room temperature along with the furnace to obtain the humidity-sensitive porous ceramic.

(6) The average porosity of the moisture-sensitive porous ceramics was measured using a porous density analyzer, the average pore diameter of the moisture-sensitive porous ceramics was measured using a pore diameter analyzer, and the compressive strength of the moisture-sensitive porous ceramics was measured using a flat pressure tester, and the performance parameters of the moisture-sensitive porous ceramics were measured as shown in table 6.

TABLE 6

(7) The prepared single wet-sensitive porous ceramic is weighed, the mass is 0.2058g, the mass of the wet-sensitive porous ceramic after the water-based tobacco tar is completely absorbed is 0.2713g, the tobacco tar filling rate is 100%, and the following mass calculation is carried out:

(mass of moisture-sensitive porous ceramic after adsorbing tobacco tar M-initial weight of moisture-sensitive porous ceramic)/tobacco tar mass at 100% of tobacco tar filling rate (i.e. 0.0655 g) =tobacco tar filling rate of ceramic;

the tobacco tar filling rate of the ceramic is calculated, the operations are repeated to obtain a plurality of humidity-sensitive porous ceramics with the tobacco tar filling rates of 0%, 50%, 75% and 100%, the resistance values of the humidity-sensitive porous ceramics are measured by using a universal meter, then the humidity-sensitive porous ceramics are placed into a culture dish, the humidity-sensitive porous ceramics are connected by using a direct current electronic load electrode, the output power is controlled at 6W, atomization simulation test is carried out, the resistance values of the humidity-sensitive porous ceramics are detected by using the universal meter, and the test data are shown in table 7.

TABLE 7

As can be seen from the above-described first, second and third embodiments, the strength of the moisture-sensitive porous ceramic is low without adding conductive powder; the addition content of the humidity-sensitive powder is small, so that when the universal meter is used for measuring the resistance of the humidity-sensitive porous ceramic, the universal meter displays the resistance value of 0 (namely, the actual resistance value of the humidity-sensitive porous ceramic is approaching to ≡), and atomization cannot be performed; meanwhile, although the humidity-sensitive powder has certain conductivity, the conductivity of the oxide cannot meet the requirement of atomizing tobacco tar.

The above describes the humidity-sensitive ceramic atomizing core and the preparation method thereof provided in the embodiments of the present application in detail, and specific examples are applied herein to illustrate the principles and embodiments of the present application, and the above examples are only used to help understand the method and core ideas of the present application; meanwhile, those skilled in the art will have variations in the specific embodiments and application scope in light of the ideas of the present application, and the present description should not be construed as limiting the present application in view of the above.

Claims

1. A humidity sensitive ceramic atomizing core comprising:

a body having micro-holes for accommodating a liquid;

the body includes:

the matrix component is formed by sintering ceramic materials;

the humidity sensitive component is formed by sintering a humidity sensitive material;

the conductive component is formed by sintering a conductive material;

wherein the moisture sensitive material has an electrical conductivity between the conductive material and the ceramic material.

2. The humidity sensitive ceramic atomizing core of claim 1, wherein:

the conductive material comprises one or more of metal simple substance, metal mixture and graphite.

3. The humidity sensitive ceramic atomizing core of claim 1, wherein:

the ceramic material comprises one or more of alpha-alumina powder, kaolin, diatomite and sodium silicate.

4. The humidity sensitive ceramic atomizing core of claim 1, wherein:

the humidity-sensitive material comprises one or more of magnesia chrome sand, alumina powder, tantalum pentoxide, ferroferric oxide and zinc oxide.

5. The humidity sensitive ceramic atomizing core of claim 1, wherein:

the mass ratio of the conductive component to the moisture sensitive component ranges from 1 to 10.

6. The humidity sensitive ceramic atomizing core of claim 1, wherein:

the mass ratio of the matrix component to the conductive component ranges from 2 to 10.

7. A method of producing a humidity sensitive ceramic atomizing core as set forth in any one of claims 1 to 6, wherein:

the preparation method comprises the following steps:

providing an injection molding feed required for green molding of the body;

injecting the injection feed into an injection mold to obtain a green body of the body;

sintering the green body of the body to obtain the body;

wherein the injection molding feed comprises a ceramic material, a humidity sensitive material and a conductive material; the moisture sensitive material has an electrical conductivity between the conductive material and the ceramic material.

8. The method of manufacturing according to claim 7, wherein:

the injection feed required to provide green injection of the body includes:

pretreating one or more of the raw materials of the ceramic material, the humidity-sensitive material and the conductive material;

the pretreatment comprises one or more of cleaning, drying and sieving.

9. The method of manufacturing according to claim 8, wherein:

the raw materials of the conductive material are powder;

the pretreatment of one or more of the raw materials of the ceramic material, the humidity-sensitive material and the conductive material comprises the following steps:

placing the raw materials of the conductive material into a cleaning agent for ultrasonic cleaning for a preset cleaning time period;

the raw materials of the conductive material and the cleaning agent are subjected to suction filtration and separation to obtain the cleaned raw materials of the conductive material;

and drying the cleaned raw materials of the conductive material at a first preset temperature for a first drying period, and then cooling to room temperature.

10. The method of manufacturing according to claim 8, wherein:

the raw materials of the humidity-sensitive material are powder;

presintering the raw materials of the humidity-sensitive material at a second preset temperature to obtain the presintered raw materials of the humidity-sensitive material;

and screening the raw materials of the wet sensitive material subjected to presintering treatment to obtain the raw materials of the wet sensitive material subjected to screening.