Preparation method of porous glass atomizer and atomization device

Abstract

The invention discloses a preparation method of a porous glass atomizer and an atomization device. The preparation method of the porous glass atomizer comprises the following steps: feeding: providing porous glass matrix powder and an organic matter; preparing a green body: mixing the porous glass matrix powder with an organic matter to form sample slurry, injecting the sample slurry into a mold, and carrying out heating forming and cooling demolding; the heat treatment comprises a first heat treatment stage and a second heat treatment stage, in the first heat treatment stage, the green body is heated and subjected to heat preservation, and in the second heat treatment stage, the green body is heated and subjected to heat preservation on the basis of the heat preservation temperature of the first heat treatment stage; the holding temperature of the second heat treatment stage is at least 200 DEG C higher than that of the first heat treatment stage; and post-treatment: cleaning and drying the green body. According to the preparation method of the porous glass atomizer, the pore diameter fluctuation of the porous glass atomizer can be reduced, and the controllability and uniformity of the pore diameter are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of heating atomization, and in particular to a preparation method of a porous glass atomizer and an atomization device. Background Art

[0002] In the related art, when manufacturing porous glass atomizers, a pore-forming agent is typically added to form uniform pores in the atomizer body. However, since porous glass atomizers require high-temperature sintering during the manufacturing process, a mismatch between the sintering temperature and the decomposition temperature of the pore-forming agent can cause the agent to decompose prematurely or late, resulting in large fluctuations in the pore size of the porous glass atomizer and hindering pore size control. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a method for preparing a porous glass atomizer, which can reduce the pore size fluctuation of the porous glass atomizer and improve the controllability and uniformity of the pore size.

[0004] The present invention also provides an atomizing device having the preparation method of the porous glass atomizer.

[0005] According to the method for preparing a porous glass atomizer in accordance with the first embodiment of the present invention, the method comprises the steps of feeding, preparing a blank, heat treatment and post-treatment.

[0006] Feeding: providing porous glass matrix powder and organic matter; preparing a blank: mixing the porous glass matrix powder with the organic matter to form a sample slurry, injecting the sample slurry into a mold, heating and molding, and cooling and demolding to obtain a blank; heat treatment: the heat treatment steps include a first heat treatment stage and a second heat treatment stage, wherein, in the first heat treatment stage, the blank is heated and kept warm, and in the second heat treatment stage, the blank is heated and kept warm based on the keeping temperature of the first heat treatment stage, and the keeping temperature of the second heat treatment stage is at least 200°C higher than the keeping temperature of the first heat treatment stage; post-processing: the blank that has completed the heat treatment step is cleaned and dried to obtain a porous glass atomizer.

[0007] The method for preparing a porous glass atomizer according to an embodiment of the present invention has at least the following beneficial effects: the porous glass matrix powder is used to make the blank have a porous structure during the forming process. In addition, by utilizing two different heat treatment stages in the heat treatment step, the internal residual stress of the blank can be slowly released during the heating of the first heat treatment stage, thereby avoiding microcracks caused by rapid heating. At the same time, the pore structure of the blank can be preliminarily stabilized during the heat preservation of the first heat treatment stage to prevent structural collapse. Moreover, during the heat preservation process, the chemical substances inside the blank begin to migrate, thereby completing phase separation and forming preliminary three-dimensional pores.

[0008] Then, the second heat treatment stage, heating, further enhances the mechanical strength of the green body, while heat preservation allows the green body's pore size distribution to be diffusely controlled at high temperatures. This reduces pore size fluctuations in the porous glass atomizer, accelerates the phase separation process, enables pore formation, and improves pore size controllability and uniformity.

[0009] According to some embodiments of the present invention, the holding temperature of the first heat treatment stage is 300°C to 400°C, and the holding temperature of the second heat treatment stage is 600°C to 800°C.

[0010] According to some embodiments of the present invention, in the first heat treatment stage, the temperature gradient of the heating is increased to between 300°C and 400°C at a rate of 5°C per minute to 10°C per minute, and in the second heat treatment stage, the temperature gradient of the heating is increased to between 600°C and 800°C at a rate of 2°C per minute to 5°C per minute.

[0011] According to some embodiments of the present invention, the heat treatment step further includes a gas introduction stage, inert gas is introduced during the heating process of the first heat treatment stage and the second heat treatment stage, and reducing gas is introduced during the insulation process of the first heat treatment stage and the second heat treatment stage.

[0012] According to some embodiments of the present invention, the preparation method of the porous glass atomizer also includes a material preparation step and a porous glass matrix powder preparation step. In the material preparation step, silicon oxide, boron oxide and sodium oxide are provided. In the step of preparing the porous glass matrix powder, the silicon oxide, boron oxide and sodium oxide are sequentially mixed, heated to melt and ground to obtain the porous glass matrix powder.

[0013] According to some embodiments of the present invention, in the step of preparing the porous glass matrix powder, at the mixing stage, at least one of zirconium dioxide, aluminum oxide, calcium oxide, phosphorus pentoxide, calcium fluoride, sodium fluoride, iron oxide, titanium dioxide, lanthanum oxide and yttrium trioxide is added to the mixed material.

[0014] According to some embodiments of the present invention, in the step of feeding, a first heating element and a second heating element are further provided. In the step of preparing the blank, the first heating element and the second heating element are placed together in the mold, and the first heating element and the second heating element are integrated into the blank.

[0015] According to some embodiments of the present invention, in the step of preparing the porous glass matrix powder, a water quenching treatment is further included between the heating and melting stage and the grinding stage. In the water quenching treatment stage, the material that has completed the heating and melting is placed in water for cooling and embrittlement.

[0016] The atomizing device according to the second embodiment of the present invention includes a porous glass atomizer prepared by the preparation method described in any of the above embodiments, a first heating element, and a second heating element.

[0017] The porous glass atomizer has a first side and a second side opposite to each other; a first heating element connected to the first side; and a second heating element connected to the second side.

[0018] The atomizing device according to the embodiment of the present invention has at least the following beneficial effects: by using the above-mentioned preparation method to prepare a porous glass atomizer, the pore size distribution on the porous glass atomizer is uniform, and when the atomizing device uses the first heating element and the second heating element to atomize and heat the atomizing medium, the utilization rate of the atomizing medium can be promoted, thereby improving the atomization effect of the atomizing device.

[0019] According to some embodiments of the present invention, the atomization device further includes a filter element, wherein the filter element is provided with a plurality of through holes, the filter element is connected to the porous glass atomizer, and is disposed between the first heating element and the second heating element.

[0020] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which: Figure 1 Schematic diagram of the preparation method in an embodiment of the present invention; Figure 2 Schematic diagram of the preparation method in an embodiment of the present invention; Figure 3 Schematic diagram of the process for preparing porous glass matrix powder in an embodiment of the present invention; Figure 4 is an experimental data table in an embodiment of the present invention; Figure 5 This is a schematic diagram of an experiment without a heat treatment step in an embodiment of the present invention; Figure 6 This is a schematic diagram of an experiment in Example 1 of the present invention; Figure 7 This is a schematic diagram of an experiment in Example 2 of the present invention; Figure 8This is a schematic diagram of an experiment in Example 3 of the present invention; Figure 9 Schematic diagram of the experiment of comparative example 1 in the embodiment of the present invention; Figure 10 Schematic diagram of the experiment of comparative example 2 in the embodiment of the present invention; Figure 11 Schematic diagram of an atomization device in an embodiment of the present invention; Figure 12 An exploded view of an atomization device according to an embodiment of the present invention; Figure 13 2 is a cross-sectional view of an atomization device in an embodiment of the present invention.

[0022] Reference numerals: Atomizing device 100; Porous glass atomizer 110; first side 111; second side 112; A first heating element 120 ; a second heating element 130 ; and a filter element 140 . DETAILED DESCRIPTION

[0023] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0024] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0025] In the description of the present invention, "several" means more than one, "plurality" means more than two, "greater than," "less than," and "exceed" are understood to exclude the number itself, while "above," "below," and "within" are understood to include the number itself. The use of "first" and "second" in the description is solely for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, implicitly specifying the number of the indicated technical features, or implicitly specifying the order of the indicated technical features.

[0026] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0027] In the description of the present invention, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the exemplary expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0028] The following describes a method for preparing a porous glass atomizer according to a first embodiment of the present invention and an atomizing device according to a second embodiment of the present invention with reference to the accompanying drawings.

[0029] The first embodiment of the present invention provides a method for preparing a porous glass atomizer 110, see Figure 1 As shown, the method for preparing the porous glass atomizer 110 includes the following steps: Step S300: Feeding: Providing porous glass matrix powder and organic matter. In this embodiment, the porous glass matrix powder is the raw material for preparing the porous glass atomizer 110. The organic matter is the binder, plasticizer, and other substances required in the process of preparing the porous glass atomizer 110, in addition to the pore-forming agent.

[0030] Step S400 , preparing a green body: mixing porous glass matrix powder with organic matter to form a sample slurry, injecting the sample slurry into a mold, and performing heating and molding and cooling and demolding to obtain a green body.

[0031] Specifically, in one example, during the blank preparation process, porous glass matrix powder and organic matter are heated, stirred, and evenly mixed to form a sample slurry for the porous glass atomizer 110. The sample slurry is then pressed into a mold and formed by hot pressing or injection molding. After the blank of the porous glass atomizer 110 is formed, it is placed in a heating device and heated to 200°C to 300°C to remove organic matter from the blank, and then prepared for the heat treatment step S500.

[0032] Step S500, heat treatment: The heat treatment step includes a first heat treatment stage (phase separation stage) and a second heat treatment stage (pore forming stage). In the first heat treatment stage, the blank needs to be placed in a heating furnace to be heated to a specified temperature, and then kept warm at the specified temperature to promote the phase separation of the chemical substances in the blank and remove the binder. Similarly, in the second heat treatment stage, the blank also needs to be placed in a heating furnace to be heated to a specified temperature, and then kept warm at the specified temperature. The holding temperature of the second heat treatment stage is at least 200°C higher than that of the first heat treatment stage. Figure 4As shown in Comparative Example 1, when the holding temperature difference between the second heat treatment stage and the first heat treatment stage is less than 200°C, the porosity of the blank is low (the porosity in Comparative Example 1 is 20%), while the required porosity is 40%-60%. Because some components in the glass undergo phase transitions or melt with increasing temperature, high-temperature heating helps open more microchannels and pores, thereby increasing the porosity of the blank. Therefore, setting the holding temperature of the second heat treatment stage at least 200°C higher than that of the first heat treatment stage ensures a more complete transformation of the glass's internal structure, resulting in a more stable and uniform porous structure.

[0033] In addition, the holding time of the second heat treatment stage is not less than the holding time of the first heat treatment stage. In this embodiment, the holding time of the first heat treatment stage is 1 hour to 2 hours, and the holding time of the second heat treatment stage is 2 hours to 4 hours.

[0034] Specifically, during the heat treatment step S500, the green body is initially heated and held (the first heat treatment stage) to release excess internal stress, prevent surface cracks, maintain structural strength, and stabilize its pore structure. Since the porous structure on the green body's surface can be controlled and diffused at high temperatures, further heating and holding (the second heat treatment stage) are performed after stabilizing the green body's internal and external structures. The pore size of the green body is then controlled and held at high temperatures, ensuring that the green body's porosity meets the required requirements.

[0035] It should be noted that, before heat treatment step S500 , the blank must be heated to 200°C to 300°C to remove organic matter from the blank. Therefore, during the first heat treatment stage, the temperature is raised to 200°C to 300°C. During the second heat treatment stage, the blank is also heated to the same temperature as in the first heat treatment stage. This improves heat treatment efficiency and accelerates the production of the porous glass atomizer 110.

[0036] Step S700, post-processing: The heat-treated green body is cleaned and dried to obtain the porous glass atomizer 110. If the porous glass atomizer 110 is weak after cleaning, the porous glass atomizer 110 may be calcined at a high temperature in the post-processing step S700 to enhance the structural stability of the porous glass atomizer 110.

[0037] In the related art, pore-forming agents are often added when preparing the porous glass atomizer 110 so as to form uniform pores on the body of the porous glass atomizer 110. However, during the forming process of the body, it needs to undergo high-temperature sintering to form the body in the mold. If the sintering temperature does not match the temperature at which the pore-forming agent decomposes, the pore size of the porous glass will fluctuate greatly, which is not conducive to controlling the pore size. Specifically, the porous materials commonly used in the heating atomization technology are organic cotton or ceramics as liquid transmission media. Organic cotton has poor temperature resistance and is easily burned, resulting in a burnt smell. In addition, the preparation process of porous ceramics is complicated. Generally, a large amount of organic pore-forming agents need to be added to form three-dimensional network pores. The pore size of the pores formed fluctuates greatly, and the problem of unstable liquid supply will occur during the transmission of the atomized liquid. At present, the preparation of porous glass generally adopts laser drilling or corrosive liquid erosion to form pores, which generally forms a two-dimensional pore network with poor liquid supply effect.

[0038] Compared with related technologies, the present invention does not require the addition of a pore-forming agent when preparing the porous glass atomizer 110, which not only avoids the problem of mismatch between the sintering temperature and the decomposition temperature of the pore-forming agent, but also reduces the pore size fluctuation of the porous glass atomizer 110 and improves the controllability and uniformity of the pore size.

[0039] Specifically, Figures 5 to 10 This is an enlarged view of the surface of the porous glass atomizer 110 obtained by scanning electron microscopy. Figure 5 As shown, Figure 5 This is a green body structure that has not been heat treated. Only a few pores of the porous glass matrix powder itself appear on the green body (the black pore structure in the figure). Figures 6 to 10 For the blank subjected to the heat treatment step S500 at different temperatures, an obvious porous structure appears on the blank, and the porosity of the blank increases. The preparation method of the porous glass atomizer 110 of the embodiment of the present invention enables the blank to have a porous structure during the forming process through the porous glass matrix powder. In addition, by utilizing two different heat treatment stages in the heat treatment step, the internal residual stress of the blank can be slowly released during the heating of the first heat treatment stage, thereby avoiding microcracks caused by rapid heating. At the same time, the pore structure of the blank can be preliminarily stabilized during the heat preservation of the first heat treatment stage to prevent structural collapse, and during the heat preservation, the chemical substances inside the blank begin to migrate, thereby completing the phase separation and forming preliminary three-dimensional pores.

[0040] Then, the second heat treatment stage, heating, further enhances the mechanical strength of the green body, while heat preservation allows the green body's pore size distribution to be diffusely controlled at high temperatures. This reduces pore size fluctuations in the porous glass atomizer, accelerates the phase separation process, enables pore formation, and improves pore size controllability and uniformity.

[0041] In some embodiments, see Figure 2 As shown, the preparation method also includes step S600, acid leaching. Acid leaching involves placing the heat-treated body in an acidic solution to pickle, etch, and expand the pores of the body after the heat treatment step S500, and to remove the soluble phase in the body. Specifically, porous glass is a specialty glass with a controllable pore structure. During the heat treatment step S500, the porous glass melt undergoes phase separation at a specific temperature, forming a silicon-rich phase and a boron-sodium-rich phase. The silicon-rich phase is primarily composed of silicon dioxide (SiO2), while the boron-sodium-rich phase is primarily composed of borosilicate glass (B2O3-Na2O). Acid leaching of the body after the heat treatment step S500, using either hydrochloric acid (HCl) or nitric acid (HNO3), removes the boron-sodium phase from the body, leaving behind the silicon-rich phase to form three-dimensional interconnected pores and improve the uniformity of the pore structure distribution. Finally, after the acid leaching step S600 is completed, the acid-leached green body is cleaned and dried in a post-processing step S700 to obtain the porous glass atomizer 110 .

[0042] In some embodiments, see Figures 1 to 3 As shown, the method for preparing the porous glass atomizer 110 further includes a step S100 of preparing materials and a step S200 of preparing a porous glass matrix powder. In an embodiment of the present invention, the porous glass matrix powder includes silicon oxide (SiO2), boron oxide (B2O3), and sodium oxide (Na2O). In the step S100 of preparing materials, silicon oxide (SiO2), boron oxide (B2O3), and sodium oxide (Na2O) need to be prepared in advance for the step S200 of preparing the porous glass matrix powder. In the step S200 of preparing the porous glass matrix powder, silicon oxide (SiO2), boron oxide (B2O3), and sodium oxide (Na2O) need to be sequentially mixed in step S201, heated and melted in step S202, and ground in step S204 to obtain the porous glass matrix powder.

[0043] Specifically, in one example, the porous glass atomizer 110 utilizes a sodium borosilicate system, with silicon oxide (SiO2), boron oxide (B2O3), and sodium oxide (Na2O) as the primary components. The silicon oxide (SiO2) content ranges from 55% to 75%, forming the skeleton structure and determining pore stability. The boron oxide (B2O3) content ranges from 20% to 35%, promoting phase separation and forming a soluble phase. A high content of B2O3 favors the formation of a connected soluble phase. The sodium oxide (Na2O) content ranges from 5% to 15%, primarily regulating phase separation behavior, specifically the separation speed and acid dissolution rate. In other embodiments, silicon oxide (SiO 2 ), boron oxide (B 2 O 3 ) and sodium oxide (Na 2 O) may also be prepared according to other component ratios, as long as a porous glass matrix powder can be obtained.

[0044] To prepare the porous glass matrix powder, appropriate amounts of silicon oxide (SiO2), boron oxide (B2O3), and sodium oxide (Na2O) are weighed according to the aforementioned proportions and stirred to complete the mixing step (S201). For ease of understanding and description, the mixed silicon oxide (SiO2), boron oxide (B2O3), and sodium oxide (Na2O) are referred to as the mixed material. The mixed material is then placed in a furnace (e.g., a crucible) and melted at high temperature to complete the heating and melting step (S202).

[0045] The melted mixture is then allowed to cool. After cooling, deionized water is added as a grinding aid. The mixture is then ground using a grinder (e.g., a planetary ball mill) until it is ground into a glass slurry, completing the grinding step (S204). Finally, the glass slurry is allowed to dry to obtain a porous glass matrix powder. While waiting for the glass slurry to dry, the ground glass slurry can be placed in an oven for drying to increase the production rate of the porous glass matrix powder.

[0046] In some embodiments, see Figure 1 and Figure 3As shown, in the mixing step S201 of the step S200 of preparing the porous glass matrix powder, after completing the mixing of silicon oxide (SiO2), boron oxide (B2O3) and sodium oxide (Na2O), it is necessary to add at least one of zirconium dioxide (ZrO2) and aluminum oxide (Al2O3) to the mixture of silicon oxide (SiO2), boron oxide (B2O3) and sodium oxide (Na2O) to improve the strength and acid resistance of the porous glass atomizer 110, or add at least one of calcium oxide (CaO), phosphorus pentoxide (P2O5), calcium fluoride (CaF2), sodium fluoride (NaF), iron oxide (Fe2O3), titanium dioxide (TiO2), lanthanum oxide (La2O3) and yttrium trioxide (Y2O3) to increase the phase separation rate of the porous glass atomizer 110 and make the pore size distribution more uniform.

[0047] Specifically, the addition of zirconium dioxide (ZrO2) can improve the acid resistance of the porous glass atomizer 110 and reduce the mass loss of the porous glass atomizer 110 during the subsequent acid treatment (acid leaching step S600). The addition of aluminum oxide (Al2O3) can inhibit excessive phase separation of the porous glass atomizer 110 and enhance the structural strength of the porous glass atomizer 110.

[0048] Adding calcium oxide (CaO) or phosphorus pentoxide (P2O5) can introduce calcium (Ca) or phosphorus (P) elements, thereby forming a bone-like apatite layer, making the porous glass atomizer 110 biologically active. Adding calcium fluoride (CaF2) or sodium fluoride (NaF) can introduce fluoride (F) ions, which can replace part of the oxygen (O 2 ) ions reduce the glass network polymerization degree of the porous glass atomizer 110 and accelerate phase separation. Adding iron oxide (Fe2O3) or titanium dioxide (TiO2) allows iron oxide (Fe2O3) or titanium dioxide (TiO2) to act as network intermediates, changing the local structure of the porous glass atomizer 110 and promoting phase separation. Adding lanthanum oxide (La2O3) or yttrium trioxide (Y2O3) can disrupt the glass network structure of the porous glass atomizer 110 through the charge effect, accelerating phase separation.

[0049] In some embodiments, in the feeding step S300, a first heating element 120 and a second heating element 130 are also provided. In the step S400 of preparing the blank, the first heating element 120 and the second heating element 130 are placed together in a mold so that the first heating element 120 and the second heating element 130 are integrated into the blank. Specifically, in the step S400 of preparing the blank, the first heating element 120 and the second heating element 130 are fixed on the mold, and then the porous glass matrix powder obtained in step S200 is pressed into the mold by a hot pressing molding device or an injection molding device. After cooling, the blank of the porous glass atomizer 110 is demolded to obtain the blank, which is integrated with the first heating element 120 and the second heating element 130.

[0050] Furthermore, in the step S200 of preparing the porous glass matrix powder, a water quenching step S203 is also included. The water quenching treatment is to place the mixed material in water for cooling and catalysis. Among them, the water quenching step S203 can not only increase the cooling rate of the mixed material, so that the mixed material can be ground faster, thereby increasing the preparation rate of the porous glass matrix powder, but also embrittle the mixed material after hot melting, thereby facilitating the grinding of the mixed material into the raw powder of the porous glass atomizer 110, and promoting the integration of the first heating element 120 and the second heating element 130 with the porous glass matrix powder respectively.

[0051] In some embodiments, see Figures 1 to 3 As shown, the insulation temperature of the first heat treatment stage is between 300°C and 400°C, and the insulation temperature of the second heat treatment stage is between 600°C and 800°C. Specifically, when preparing the porous glass atomizer 110, the porosity of the porous glass atomizer 110 needs to be maintained between 40% and 60%, thereby ensuring that the porous glass atomizer 110 has good atomization effect and structural strength. When the porosity is less than 40%, the atomization effect of the porous glass atomizer 110 is poor. During the heating of the atomizing medium, the low porosity will lead to untimely supply of the atomizing medium, thereby causing dry burning of the heating elements (the first heating element 120 and the second heating element 130). When the porosity is greater than 60%, the porous glass atomizer 110 has too many porous structures, resulting in low strength of the porous glass atomizer 110.

[0052] In one embodiment, see Figure 4 and Figure 6 As shown in the figure, when the holding temperature of the first heat treatment stage is 350°C and the holding temperature of the second heat treatment stage is 700°C, a uniform pore structure distribution appears on the green body, and a three-dimensional network structure is formed between the pore structures. At this time, the porosity of the green body is 55%.

[0053] In one embodiment, see Figure 4 and Figure 8As shown in the figure, when the holding temperature of the first heat treatment stage is 300°C and the holding temperature of the second heat treatment stage is 600°C, a porous structure distribution appears on the green body, but the porous structure is relatively small, and no three-dimensional network structure is formed between the pore structures. At this time, the porosity of the green body is 45%.

[0054] In one embodiment, see Figure 4 and Figure 9 As shown in the figure, when the holding temperature of the first heat treatment stage is 400°C and the holding temperature of the second heat treatment stage is 800°C, a porous structure distribution appears on the green body, and a three-dimensional network structure is formed between the pore structures, but the pore diameter of the pore structure is larger. At this time, the porosity of the green body is 60%.

[0055] In one embodiment, see Figure 4 and Figure 10 As shown, when the holding temperature of the first heat treatment stage is 350°C and the holding temperature of the second heat treatment stage is 550°C, a distribution of pore structures appears on the green body, but the pore structures are too few and no three-dimensional network structure is formed between the pore structures. At this time, the porosity of the green body is 20%. In this embodiment, the porosity of the porous glass atomizer 110 is low, and the heating element may dry out during use.

[0056] In one embodiment, see Figure 4 and Figure 7 As shown, when the holding temperature of the first heat treatment stage is 350°C and the holding temperature of the second heat treatment stage is 850°C, a pore structure distribution appears on the green body, forming a three-dimensional network structure between the pore structures. However, the pore structure has a large pore size, and the porosity of the green body is 70%. In this embodiment, the high porosity of the porous glass atomizer 110 results in an excessively large pore size of the porous glass atomizer 110, resulting in a low overall structural strength of the porous glass atomizer 110.

[0057] In other embodiments (not shown), the primary function of the first heat treatment stage is to release internal stress in the green body and stabilize the pore structure, while the primary function of the second heat treatment stage is to control the pore size distribution and promote densification of the pore structure. Therefore, when the temperature of the first heat treatment stage exceeds the range (300°C to 400°C), the porous glass atomizer 110 may experience pore structure collapse.

[0058] Furthermore, in the first heat treatment stage, when the temperature is raised to between 300°C and 400°C, the temperature needs to be raised at a rate of 5°C to 10°C per minute. In the second heat treatment stage, when the temperature is raised to between 600°C and 800°C, the temperature needs to be raised at a rate of 2°C to 5°C per minute. In the first heat treatment stage, a heating rate of 5°C to 10°C can slowly release the internal residual stress of the blank, avoiding microcracks caused by rapid heating. In the second heat treatment stage, a heating rate of 2°C to 5°C can promote the densification of the glass network structure and improve the mechanical strength. In addition, by controlling the length of time of the heating temperature, the pore size distribution can be regulated to achieve the reduction or expansion of the pores.

[0059] In this embodiment, see Figure 4 As shown, in the first heat treatment stage, the green body is subjected to gradient heating at a heating rate of 8°C per minute. In the second heat treatment stage, the green body is subjected to gradient heating at a heating rate of 3°C per minute. In other embodiments, the temperature rise rates of the first heat treatment stage and the second heat treatment stage can also be other values, as long as the temperature rise rates are within the required range. Among them, when the temperature rise rate value exceeds the required range value of the first heat treatment stage or the second heat treatment stage (not shown in the figure), if the temperature rise rate is too fast, it will cause the green body to crack and collapse. If the temperature rise rate is too slow, the pore size of the pore structure of the green body will be too small.

[0060] Furthermore, the heat treatment step S500 further includes a gas introduction stage, wherein an inert gas needs to be introduced into the heating furnace during the heating process of the first heat treatment stage and the second heat treatment stage, and a reducing gas needs to be introduced into the heating furnace during the heat preservation process of the first heat treatment stage and the second heat treatment stage.

[0061] Specifically, in the first heat treatment stage and the second heat treatment stage, when the blank is heated, an inert gas needs to be introduced to the surface of the blank. By introducing an inert gas, crystallization on the surface of the blank can be avoided, which causes quality loss of the blank, and the introduction of an inert gas can also prevent the gas from reacting with the blank and affecting the preparation of the porous glass atomizer 110. In this embodiment, the inert gas is argon (Ar). In other embodiments, the inert gas can also be other gases, such as helium (He), or neon (Ne) and other inert gases. Then, when the blank is kept warm, a reducing gas, such as nitrogen (N2), hydrogen (H2), or a mixture of nitrogen (N2) and hydrogen (H2), needs to be introduced to the surface of the blank. By introducing a reducing gas, it is possible to prevent external air from penetrating into the heating furnace and causing oxidation of the blank, resulting in microcracks on the surface of the blank, thereby reducing the structural strength of the porous glass atomizer 110. Furthermore, the internal gas pressure of the heating furnace can be controlled during the gas introduction phase of the heat treatment step S500 , thereby preventing foreign matter from entering the heating furnace and affecting the preparation of the porous glass atomizer 110 .

[0062] The second embodiment of the present invention provides an atomizing device 100, see Figures 11 to 13 As shown, the atomizing device 100 includes a porous glass atomizer 110, a first heating element 120, and a second heating element 130. The porous glass atomizer 110 is made by the preparation method described in any of the above embodiments.

[0063] The porous glass atomizer 110 has a first side 111 and a second side 112 that are arranged opposite to each other in the up-down direction. The first side 111 and the second side 112 are two side walls of the porous glass atomizer 110 in the up-down direction. The porous glass atomizer 110 obtained by the above-mentioned preparation method has a plurality of interconnected pore units inside, and some of the pore units connect the first side 111 and the second side 112 of the porous glass atomizer 110, so that the atomizing medium can flow inside the porous glass atomizer 110 through the pore units, thereby flowing from the first side 111 to the second side 112. The first heating element 120 is arranged on the first side 111, and the second heating element 130 is arranged on the second side 112. The second heating element 130 is arranged below the first heating element 120 in the up-down direction.

[0064] Specifically, in one example, the atomizing device 100 is used in the medical field. When in use, a solid atomizing medium needs to be placed on the first side 111 of the porous glass atomizer 110, and the atomizing medium is preheated through the first heating element 120 on the first side 111 to melt the atomizing medium. After melting, the atomizing medium will flow through the interior of the porous glass atomizer 110 through the pore unit, and then flow to the second side 112, and the liquid atomizing medium will be heated for the second time by the second heating element 130 to convert the atomizing medium into an aerosol. Among them, the first heating element 120 and the second heating element 130 can be placed in a mold in the step S400 of preparing the blank to be integrated with the porous glass atomizer 110, so as to realize the connection of the first heating element 120 and the second heating element 130 with the porous glass atomizer 110 respectively. Alternatively, after the porous glass atomizer 110 is formed, the porous glass atomizer 110 may be connected to the first side 111 and the second side 112 of the porous glass atomizer 110 by means of hot melting or other connection and fixing methods.

[0065] The atomizing device 100 of the embodiment of the present invention is prepared by using the above-mentioned preparation method to obtain a porous glass atomizer 110, so that the pore size distribution on the porous glass atomizer 110 is uniform. When the atomizing device 100 uses the first heating element 120 and the second heating element 130 to atomize and heat the atomizing medium, the utilization rate of the atomizing medium can be promoted, the conversion rate of the atomizing medium into aerosol can be increased, and the atomization effect of the atomizing device 100 can be improved.

[0066] In some embodiments, see Figure 12 and Figure 13 As shown, the atomizing device 100 also includes a filter element 140, which is provided with a plurality of through holes in the up-down direction. The filter element 140 is connected to the porous glass atomizer 110 and is provided between the first heating element 120 and the second heating element 130 in the up-down direction. The plurality of through holes are connected to one of the plurality of pore units of the porous glass atomizer 110.

[0067] Specifically, the filter element 140 is arranged between the first heating element 120 and the second heating element 130, and is used to filter the atomized medium. When the atomizing device 100 is used to heat the atomized medium to generate an aerosol, the first heating element 120 will melt the atomized medium. However, during the melting process, some small blocks of atomized medium will move from the first side 111 to the second side 112 through the pore unit. The filter element 140 is arranged between the first heating element 120 and the second heating element 130, so that the filter element 140 can filter the atomized medium to prevent the incompletely melted atomized medium from flowing to the second side 112 and affecting the atomization effect of the second heating element 130. When the atomized medium is not completely melted, the filter element 140 will block the movement of the atomized medium. Because the porous glass atomizer 110 is made of a heat-conducting material and the filter element 140 is connected to the porous glass atomizer 110, the first heating element 120 can conduct heat to the filter element 140 through the porous glass atomizer 110, thereby melting the atomizing medium blocked by the filter element 140. After the atomizing medium is melted into a liquid, it can flow through the through-holes of the filter element 140 to the second side 112 to be atomized into an aerosol. Furthermore, the filter element 140 can filter foreign impurities, preventing them from flowing along with the atomizing medium to the second side 112 for heating and atomization, thereby affecting the quality of the aerosol.

[0068] Further, in some embodiments, see Figure 13 As shown, the filter element 140 is housed within the porous glass atomizer 110. The porous glass atomizer 110 defines a sodium storage chamber, which is vertically disposed between the first side 111 and the second side 112. The sodium storage chamber communicates with the plurality of pore units of the porous glass atomizer 110. The filter element 140 is disposed within the sodium storage chamber.

[0069] Specifically, since the filter 140 is used to block the incompletely melted atomizing medium and impurities, the sodium holding chamber is limited to the interior of the porous glass atomizer 110. The filter 140 is arranged in the sodium holding chamber, which can further prevent the atomizing medium or impurities blocked by the filter 140 from accumulating on the first side 111, thereby affecting the melting of the remaining atomizing medium by the first heating element 120, resulting in a longer time for the atomizing medium to melt and be supplied to the second heating element 130, causing the second heating element 130 to dry burn. At the same time, arranging the filter 140 inside the porous glass atomizer 110 can also improve the space utilization of the porous glass atomizer 110. The sodium holding chamber not only reduces the space occupied by the filter 140 assembly and reduces the overall volume of the atomizing device 100, but also improves the assembly compactness of the atomizing device 100, provides a stable installation position for the filter 140, ensures that the filter 140 effectively participates in the entire heating and melting process, and improves the reliability and stability of the atomizing device 100.

[0070] While the embodiments of the present invention have been described in detail above with reference to the accompanying drawings, the present invention is not limited to the embodiments described above. Various modifications may be made within the scope of knowledge possessed by a person skilled in the art without departing from the spirit of the present invention. Furthermore, the embodiments of the present invention and the features thereof may be combined with one another unless there is a conflict.

Claims

1. A method for preparing a porous glass atomizer, characterized in that: The following steps are involved: Feeding: providing porous glass matrix powder and organic matter; Preparing a green body: mixing the porous glass matrix powder with the organic matter to form a sample slurry, injecting the sample slurry into a mold, and performing heating and molding and cooling and demolding to obtain a green body; Heat treatment: The heat treatment step includes a first heat treatment stage and a second heat treatment stage, wherein in the first heat treatment stage, the green body is heated and kept warm, and in the second heat treatment stage, the green body is heated and kept warm based on the temperature of the first heat treatment stage, and the temperature of the second heat treatment stage is at least 200°C higher than the temperature of the first heat treatment stage; Post-processing: cleaning and drying the green body after the heat treatment step to obtain the porous glass atomizer.

2. The method for preparing a porous glass atomizer according to claim 1, wherein: The holding temperature of the first heat treatment stage is 300° C. to 400° C., and the holding temperature of the second heat treatment stage is 600° C. to 800° C.

3. The method for preparing a porous glass atomizer according to claim 2, wherein: In the first heat treatment stage, the temperature gradient of the heating is increased to between 300°C and 400°C at a rate of 5°C per minute to 10°C per minute. In the second heat treatment stage, the temperature gradient of the heating is increased to between 600°C and 800°C at a rate of 2°C per minute to 5°C per minute.

4. The method for preparing a porous glass atomizer according to claim 1, wherein: The heat treatment step also includes a gas introduction stage, inert gas is introduced during the heating process of the first heat treatment stage and the second heat treatment stage, and reducing gas is introduced during the insulation process of the first heat treatment stage and the second heat treatment stage.

5. The method for preparing a porous glass atomizer according to claim 1, wherein: The preparation method of the porous glass atomizer also includes a material preparation step and a porous glass matrix powder preparation step. In the material preparation step, silicon oxide, boron oxide and sodium oxide are provided. In the porous glass matrix powder preparation step, the silicon oxide, boron oxide and sodium oxide are sequentially mixed, heated to melt and ground to obtain the porous glass matrix powder.

6. The method for preparing a porous glass atomizer according to claim 5, wherein: In the step of preparing the porous glass matrix powder, at least one of zirconium dioxide, aluminum oxide, calcium oxide, phosphorus pentoxide, calcium fluoride, sodium fluoride, iron oxide, titanium dioxide, lanthanum oxide and yttrium trioxide is added to the mixed material during the mixing stage.

7. The method for preparing a porous glass atomizer according to claim 5, wherein: In the step of feeding, a first heating element and a second heating element are provided. In the step of preparing the blank, the first heating element and the second heating element are placed together in the mold, and the first heating element and the second heating element are integrated into the blank.

8. The method for preparing a porous glass atomizer according to claim 7, wherein: In the step of preparing the porous glass matrix powder, a water quenching treatment is further included between the heating and melting stage and the grinding stage. In the water quenching treatment stage, the heated and melted material is placed in water for cooling and embrittlement.

9. Atomizing device, characterized in that include: The porous glass atomizer prepared by the method for preparing a porous glass atomizer according to any one of claims 1 to 8, wherein the porous glass atomizer has a first side and a second side opposite to each other; a first heating element connected to the first side; A second heating element is connected to the second side.

10. The atomizing device according to claim 9, characterized in that: The atomizing device further includes a filter element, which is provided with a plurality of through holes. The filter element is connected to the porous glass atomizer and is provided between the first heating element and the second heating element.

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