Wax removal powder, wax removal method, ceramic atomizing core and preparation method thereof, and atomizer

Abstract

The application provides a wax removal powder, a wax removal method, a ceramic atomizing core and a preparation method thereof, and an atomizer. A water-soluble substance is used to replace traditional alumina as the wax removal powder. After wax removal and sintering, the wax removal powder covering the surface of the ceramic body can be effectively removed by using clean water to wash, the coverage of the wax removal powder on the surface of the ceramic body is greatly reduced, and the influence of the wax removal powder on the subsequent use of the ceramic body is reduced.

Description

Technical Field

[0001] This application relates to the field of wax removal technology, and in particular to a wax removal powder, a wax removal method, a ceramic atomizing core and its preparation method, and an atomizer. Background Technology

[0002] During the high-temperature sintering of ceramic blanks, the paraffin component melts, volatilizes, or even burns, causing the ceramic blank to lose its binding and collapse. Therefore, to prevent changes in the shape of the ceramic blank before and after sintering, it is necessary to completely immerse the ceramic blank in dewaxing powder before placing it in the furnace for sintering. The dewaxing powder, as a filler material, maintains the original shape of the blank even in a dewaxed state and absorbs the molten paraffin, causing it to burn and volatilize. Currently, existing technologies mostly use alumina as the dewaxing powder. However, the inventors have discovered that using alumina as the dewaxing powder for high-temperature sintering affects the subsequent use of the ceramic blank. Summary of the Invention

[0003] Based on this, this application provides a wax-removing powder, a wax-removing method, a ceramic atomizing core and its preparation method, and an atomizer, which can reduce the coverage of the wax-removing powder on the surface of the ceramic body, thereby reducing the impact of the wax-removing powder on the subsequent use of the ceramic body.

[0004] In a first aspect, embodiments of this application provide a dewaxing powder, which includes a water-soluble substance.

[0005] In one embodiment, the water-soluble substance is a water-soluble inorganic salt.

[0006] In one embodiment, the water-soluble inorganic salt includes at least one of potassium sulfate, magnesium sulfate, sodium chloride, sodium sulfate, potassium chloride, sodium fluoride, and potassium fluoride.

[0007] In one embodiment, the particle size of the water-soluble inorganic salt is 30 μm to 1000 μm.

[0008] In one embodiment, the dewaxing powder further includes an anti-caking agent, wherein the anti-caking agent has a weight percentage of not less than 10%.

[0009] In one embodiment, the anti-caking agent has a weight percentage of no more than 30%.

[0010] In one embodiment, the anti-caking agent includes at least one of calcium oxide, quartz powder, diatomaceous earth, silicon carbide, silicon nitride, and zirconium oxide.

[0011] Secondly, embodiments of this application provide a method for removing wax from ceramic wax blanks, including:

[0012] Prepare the dewaxing powder described in any of the above embodiments;

[0013] The wax-removing powder is used to bury the ceramic wax blank;

[0014] The buried ceramic wax blank is subjected to high-temperature wax removal and sintering to obtain a ceramic blank.

[0015] In one embodiment, if the dewaxing powder comprises a water-soluble substance and an anti-caking agent, then the step of preparing the dewaxing powder includes:

[0016] The water-soluble substance and not less than 10% of the anti-caking agent are added to the mixer and mixed for 0.5h to 2h according to the weight percentage to obtain the dewaxing powder.

[0017] Thirdly, embodiments of this application provide a method for preparing a ceramic atomizing core, comprising:

[0018] The wax removal method for ceramic wax blanks described in any of the above embodiments is used to remove wax from the ceramic wax blanks to obtain ceramic blanks;

[0019] The ceramic blank is cleaned to obtain a ceramic atomizing core.

[0020] Fourthly, embodiments of this application provide a ceramic atomizing core, which is prepared using the preparation method described in any of the above embodiments.

[0021] Fifthly, embodiments of this application provide an atomizer, including the ceramic atomizing core described in any of the above embodiments.

[0022] Compared with the prior art, this application has the following beneficial effects:

[0023] This application uses a water-soluble substance instead of traditional alumina as the dewaxing powder. After dewaxing and sintering, the dewaxing powder covering the surface of the ceramic body can be effectively removed by washing with water, which greatly reduces the coverage of the dewaxing powder on the surface of the ceramic body and thus reduces the impact of the dewaxing powder on the subsequent use of the ceramic body. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 The image shows the morphology of the ceramic atomizing core prepared in Comparative Example 1 under a scanning electron microscope.

[0026] Figure 2 The image shows the morphology of the ceramic atomizing core prepared in Example 3 under a scanning electron microscope. Detailed Implementation

[0027] To facilitate understanding of the present invention, a more complete description will be given below with reference to embodiments, of which preferred embodiments are provided. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are provided so that a thorough and complete understanding of the disclosure of the present invention will be achieved.

[0028] Unless otherwise defined, 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 pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0029] As used herein, the terms “and / or,” “or / and,” and “and / or” may include any one of two or more of the related listed items, as well as any and all combinations of the related listed items, including any two related listed items, any more related listed items, or a combination of all the related listed items.

[0030] In this invention, terms such as "first aspect" and "second aspect" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or quantity, nor should they be construed as implicitly indicating the importance or quantity of the indicated technical features. Moreover, terms such as "first" and "second" serve only as a non-exhaustive enumeration and should be understood not to constitute a closed limitation on the quantity.

[0031] In this article, the technical features described in an open-ended manner include both closed technical solutions composed of the listed features and open technical solutions that include the listed features.

[0032] In this document, numerical ranges are referred to as continuous unless otherwise specified, and include the minimum and maximum values ​​of the range, as well as every value between the minimum and maximum values. Furthermore, when a range refers to an integer, it includes every integer between the minimum and maximum values ​​of the range. Additionally, when multiple ranges are provided to describe a feature or characteristic, the ranges may be merged. In other words, unless otherwise specified, all ranges disclosed herein should be understood to include any and all subranges to which they are incorporated.

[0033] Unless otherwise specified, the percentage content mentioned in this article refers to weight percentage for solid-liquid mixtures, solid-to-solid mixtures, and liquid-to-liquid mixtures.

[0034] In some embodiments, this application provides a dewaxing powder that may include a water-soluble substance. In this document, the water-soluble substance may be a substance with a solubility greater than 5g in 100g of water at 20°C, and may be, but is not limited to, water-soluble polymers, water-soluble organic salts, and water-soluble inorganic salts.

[0035] In a specific example, the water-soluble substance can be a water-soluble inorganic salt. Further, the water-soluble inorganic salt can include at least one of potassium sulfate, magnesium sulfate, sodium chloride, sodium sulfate, potassium chloride, sodium fluoride, and potassium fluoride.

[0036] Alternatively, for example, water-soluble inorganic salts may include potassium sulfate and sodium sulfate. As another example, water-soluble inorganic salts may include potassium sulfate and sodium chloride. Yet another example is that water-soluble inorganic salts may include potassium sulfate, potassium chloride, and potassium fluoride.

[0037] In a specific example, the particle size of the water-soluble inorganic salt can be from 30 μm to 1000 μm. Optionally, the particle size of the water-soluble inorganic salt can be 30 μm, 40 μm, 50 μm, 60 μm, 70 μm, 80 μm, 90 μm, 100 μm, 200 μm, 300 μm, 400 μm, 500 μm, 600 μm, 700 μm, 800 μm, 900 μm, or 1000 μm.

[0038] When water-soluble inorganic salts are used as dewaxing powder, the dewaxing powder may agglomerate and clump after high-temperature sintering in some implementation methods, affecting its reuse. For example, when the dewaxing powder is 100% sodium chloride by weight, it agglomerates and clumps after high-temperature sintering, rendering it unusable.

[0039] To prevent agglomeration and ensure the dewaxing powder can be reused multiple times, in a specific example, the dewaxing powder may include at least 10% anti-caking agent by weight percentage. In other words, the dewaxing powder may include no more than 90% water-soluble inorganic salt and at least 10% anti-caking agent. Optionally, the weight percentage of the anti-caking agent may be 10%, 15%, 20%, 25%, 30%, 35%, or 40%.

[0040] The ratio of anti-caking agent to water-soluble inorganic salt affects the coverage of the dewaxing powder on the ceramic body surface. A higher weight percentage of anti-caking agent corresponds to a lower weight percentage of water-soluble inorganic salt. To prevent the dewaxing powder from agglomerating after high-temperature sintering while maintaining a low coverage rate on the ceramic body surface, in a specific example, the weight percentage of the anti-caking agent is no more than 30%, i.e., between 10% and 30%.

[0041] In a specific example, the anti-caking agent may include at least one of calcium oxide, quartz powder, diatomaceous earth, silicon carbide, silicon nitride, and zirconium oxide. Alternatively, for example, the water-soluble organic salt may include calcium oxide and quartz powder. As another example, the water-soluble inorganic salt may include diatomaceous earth, silicon carbide, and silicon nitride.

[0042] In the above embodiments, the dewaxing powder of this application uses a water-soluble substance instead of traditional alumina as the dewaxing powder. After dewaxing and sintering, the dewaxing powder covering the surface of the ceramic body can be effectively removed by washing with water, which greatly reduces the coverage of the dewaxing powder on the surface of the ceramic body and thus reduces the impact of the dewaxing powder on the subsequent use of the ceramic body.

[0043] In some embodiments, this application also provides a method for dewaxing ceramic wax blanks based on the above-mentioned dewaxing powder, specifically including the following steps:

[0044] Prepare the dewaxing powder described in any of the above embodiments;

[0045] The wax-removing powder is used to bury the ceramic wax blank;

[0046] The buried ceramic wax blank is subjected to high-temperature wax removal and sintering to obtain a ceramic blank.

[0047] Specifically, before high-temperature sintering, the ceramic wax blank can be completely buried in the wax-removing powder described in any of the above embodiments, and then the buried ceramic wax blank can be placed in the furnace for high-temperature wax removal and sintering. In this way, the wax-removing powder can absorb the molten paraffin and maintain the original shape of the blank, thus preventing the shape of the blank from changing before and after high-temperature sintering.

[0048] For example, in the process of dewaxing ceramic blanks, the ceramic wax blanks can first be placed in a sintering bowl and completely submerged in dewaxing powder. The submerged ceramic wax blanks are then sent into a furnace for high-temperature dewaxing and sintering. After high-temperature sintering, once the furnace has cooled to room temperature, the sintering bowl is removed, and a sieve is used to separate the sintered ceramic blanks and the dewaxing powder from the sintering bowl, removing any detachable dewaxing powder adhering to the surface of the ceramic blanks.

[0049] In a specific example, when the dewaxing powder includes a water-soluble substance and an anti-caking agent, in order to uniformly mix the water-soluble substance and the anti-caking agent, this application can prepare the dewaxing powder described in any of the above embodiments through the following steps:

[0050] By weight percentage, water-soluble substances and not less than 10% of anti-caking agent are added to a mixer and mixed for 0.5h to 2h to obtain the dewaxing powder.

[0051] Optionally, the mixer can be a V-type mixer. The mixing time can be 0.5h, 1h, 1.5h, or 2h.

[0052] In some embodiments, this application also provides a method for preparing a ceramic atomizing core based on the above-described wax removal method, specifically including the following steps:

[0053] The wax removal method described in any of the above embodiments is used to remove wax from the ceramic blank to obtain a ceramic blank.

[0054] The ceramic blank is cleaned to obtain a ceramic atomizing core.

[0055] In a specific example, during the cleaning step, the ceramic blank can be placed in an ultrasonic cleaner and rinsed with clean water for 10 to 60 minutes. Optionally, the cleaning time can be 10 minutes, 20 minutes, 30 minutes, 40 minutes, 50 minutes, or 60 minutes.

[0056] In a specific example, after the cleaning step, the cleaned ceramic atomizing core can be placed in an oven to dry at a temperature of 110℃ to 160℃ for 2 hours to 4 hours. Optionally, the drying temperature can be 110℃, 120℃, 130℃, 140℃, 150℃, or 160℃; and the drying time can be 2 hours, 2.5 hours, 3 hours, 3.5 hours, or 4 hours.

[0057] In some embodiments, this application also provides a ceramic atomizing core, which is prepared by the method for preparing ceramic atomizing cores described in any of the above embodiments.

[0058] In some embodiments, this application also provides an atomizer comprising the ceramic atomizing core described in any of the above embodiments.

[0059] The present invention will be further described in detail below with reference to specific embodiments. Unless otherwise specified, the experimental methods used in the following embodiments and comparative examples are conventional methods. Unless otherwise specified, the raw materials and reagents used in the following embodiments and comparative examples are commercially available products.

[0060] In Examples 1-7 and Comparative Example 1, the particle size of the dewaxing powder was 100 μm. In Examples 1-10 and Comparative Examples 1-3, the dewaxing powder was composed of a single substance. In Examples 11-28, the particle size of sodium chloride was 500 μm.

[0061] Example 1:

[0062] The ceramic wax blanks were placed in a sintering bowl and completely submerged using 100% potassium sulfate as the wax removal powder. The submerged ceramic wax blanks were then sent into a furnace for high-temperature wax removal and sintering. After high-temperature sintering, the sintering bowl was removed after the furnace cooled to room temperature, and the sintered ceramic blanks and wax removal powder were separated using a sieve. The separated ceramic blanks were placed in an ultrasonic cleaner and washed with clean water for 20 minutes to obtain the ceramic atomizing core. The ceramic atomizing core was then placed in a dryer and kept at 120℃ for 2 hours.

[0063] Example 2:

[0064] Ceramic wax blanks were placed in a sintering bowl and completely submerged using 100% magnesium sulfate as the wax removal powder. The submerged ceramic wax blanks were then sent into a furnace for high-temperature wax removal and sintering. After high-temperature sintering, the sintering bowl was removed after the furnace cooled to room temperature, and the sintered ceramic blanks and wax removal powder were separated using a sieve. The separated ceramic blanks were placed in an ultrasonic cleaner and washed with clean water for 20 minutes to obtain ceramic atomizing cores. The ceramic atomizing cores were then placed in a dryer and kept at 120℃ for 2 hours.

[0065] Example 3:

[0066] Ceramic wax blanks were placed in a sintering bowl and completely submerged using 100% sodium chloride as the wax removal powder. The submerged ceramic wax blanks were then sent into a furnace for high-temperature wax removal and sintering. After high-temperature sintering, the sintering bowl was removed after the furnace cooled to room temperature, and the sintered ceramic blanks and wax removal powder were separated using a sieve. The separated ceramic blanks were placed in an ultrasonic cleaner and washed with clean water for 20 minutes to obtain ceramic atomizing cores. The ceramic atomizing cores were then placed in a dryer and kept at 120℃ for 2 hours.

[0067] Example 4:

[0068] Ceramic wax blanks were placed in a sintering bowl and completely submerged using 100% sodium sulfate as the wax removal powder. The submerged ceramic wax blanks were then sent into a furnace for high-temperature wax removal and sintering. After high-temperature sintering, the sintering bowl was removed after the furnace cooled to room temperature, and the sintered ceramic blanks and wax removal powder were separated using a sieve. The separated ceramic blanks were placed in an ultrasonic cleaner and washed with clean water for 20 minutes to obtain ceramic atomizing cores. The ceramic atomizing cores were then placed in a dryer and kept at 120℃ for 2 hours.

[0069] Example 5:

[0070] The ceramic wax blanks were placed in a sintering bowl and completely submerged using 100% potassium chloride as the wax removal powder. The submerged ceramic wax blanks were then sent into a furnace for high-temperature wax removal and sintering. After high-temperature sintering, the sintering bowl was removed after the furnace cooled to room temperature, and the sintered ceramic blanks and wax removal powder were separated using a sieve. The separated ceramic blanks were placed in an ultrasonic cleaner and washed with clean water for 20 minutes to obtain the ceramic atomizing core. The ceramic atomizing core was then placed in a dryer and kept at 120℃ for 2 hours.

[0071] Example 6:

[0072] Ceramic wax blanks were placed in a sintering bowl and completely submerged using 100% sodium fluoride as the wax removal powder. The submerged ceramic wax blanks were then sent into a furnace for high-temperature wax removal and sintering. After high-temperature sintering, the sintering bowl was removed after the furnace cooled to room temperature, and the sintered ceramic blanks and wax removal powder were separated using a sieve. The separated ceramic blanks were placed in an ultrasonic cleaner and washed with clean water for 20 minutes to obtain ceramic atomizing cores. The ceramic atomizing cores were then placed in a dryer and kept at 120℃ for 2 hours.

[0073] Example 7:

[0074] The ceramic wax blanks were placed in a sintering bowl and completely submerged using 100% potassium fluoride as the wax removal powder. The submerged ceramic wax blanks were then sent into a furnace for high-temperature wax removal and sintering. After high-temperature sintering, the sintering bowl was removed after the furnace cooled to room temperature, and the sintered ceramic blanks and wax removal powder were separated using a sieve. The separated ceramic blanks were placed in an ultrasonic cleaner and washed with clean water for 20 minutes to obtain the ceramic atomizing core. The ceramic atomizing core was then placed in a dryer and kept at 120℃ for 2 hours.

[0075] Example 8:

[0076] Ceramic wax blanks were placed in a sintering bowl and completely submerged in 100% potassium sulfate with a particle size of 30 μm as the wax removal powder. The submerged ceramic wax blanks were then sent into a furnace for high-temperature wax removal and sintering. After high-temperature sintering, the sintering bowl was removed after the furnace cooled to room temperature, and the sintered ceramic blanks and wax removal powder were separated using a sieve. The separated ceramic blanks were placed in an ultrasonic cleaner and washed with clean water for 20 minutes to obtain ceramic atomizing cores. The ceramic atomizing cores were then placed in a dryer and kept at 120℃ for 2 hours.

[0077] Example 9:

[0078] Ceramic wax blanks were placed in a sintering bowl and completely submerged in 100% potassium sulfate with a particle size of 500 μm as the wax removal powder. The submerged ceramic wax blanks were then sent into a furnace for high-temperature wax removal and sintering. After high-temperature sintering, the sintering bowl was removed after the furnace cooled to room temperature, and the sintered ceramic blanks and wax removal powder were separated using a sieve. The separated ceramic blanks were placed in an ultrasonic cleaner and washed with clean water for 20 minutes to obtain ceramic atomizing cores. The ceramic atomizing cores were then placed in a dryer and kept at 120°C for 2 hours.

[0079] Example 10:

[0080] Ceramic wax blanks were placed in a sintering bowl and completely submerged in potassium sulfate with a particle size of 1000 μm as the wax removal powder. The submerged ceramic wax blanks were then sent into a furnace for high-temperature wax removal and sintering. After high-temperature sintering, the sintering bowl was removed after the furnace cooled to room temperature, and the sintered ceramic blanks and wax removal powder were separated using a sieve. The separated ceramic blanks were placed in an ultrasonic cleaner and washed with clean water for 20 minutes to obtain ceramic atomizing cores. The ceramic atomizing cores were then placed in a dryer and kept at 120°C for 2 hours.

[0081] Example 11:

[0082] According to the ratio of sodium chloride and anti-caking agent shown in Table 3, the raw materials are weighed and the sodium chloride and anti-caking agent are fed into a V-type mixer and mixed for 1 hour to obtain dewaxing powder.

[0083] The ceramic wax blanks were placed in a sintering bowl and completely submerged in wax-removing powder. The submerged ceramic wax blanks were then sent into a furnace for high-temperature wax removal and sintering. After high-temperature sintering, the sintering bowl was removed after the furnace cooled to room temperature, and the sintered ceramic blanks and wax-removing powder were separated using a sieve. The separated ceramic blanks were placed in an ultrasonic cleaner and washed with clean water for 20 minutes to obtain the ceramic atomizing core. The ceramic atomizing core was then placed in a dryer and kept at 120℃ for 2 hours.

[0084] The preparation methods of Examples 12-27 are the same as those of Example 11.

[0085] Example 28:

[0086] Ceramic wax blanks were placed in a sintering bowl and completely submerged in 100% sodium chloride with a particle size of 500 μm as the wax removal powder. The submerged ceramic wax blanks were then sent into a furnace for high-temperature wax removal and sintering. After high-temperature sintering, the sintering bowl was removed after the furnace cooled to room temperature, and the sintered ceramic blanks and wax removal powder were separated using a sieve. The separated ceramic blanks were placed in an ultrasonic cleaner and washed with clean water for 20 minutes to obtain ceramic atomizing cores. The ceramic atomizing cores were then placed in a dryer and kept at 120°C for 2 hours.

[0087] Comparative Example 1:

[0088] Ceramic wax blanks were placed in a sintering bowl and completely submerged in 100% alumina with a particle size of 100μm as the wax removal powder. The submerged ceramic wax blanks were then sent into a furnace for high-temperature wax removal and sintering. After high-temperature sintering, the sintering bowl was removed after the furnace cooled to room temperature, and the sintered ceramic blanks and wax removal powder were separated using a sieve. The separated ceramic blanks were placed in an ultrasonic cleaner and washed with clean water for 20 minutes to obtain ceramic atomizing cores. The ceramic atomizing cores were then placed in a dryer and kept at 120℃ for 2 hours.

[0089] Comparative Example 2:

[0090] Ceramic wax blanks were placed in a sintering bowl and completely submerged in potassium sulfate with a particle size of 20 μm as the wax removal powder. The submerged ceramic wax blanks were then sent into a furnace for high-temperature wax removal and sintering. After high-temperature sintering, the sintering bowl was removed after the furnace cooled to room temperature, and the sintered ceramic blanks and wax removal powder were separated using a sieve. The separated ceramic blanks were placed in an ultrasonic cleaner and washed with clean water for 20 minutes to obtain ceramic atomizing cores. The ceramic atomizing cores were then placed in a dryer and kept at 120°C for 2 hours.

[0091] Comparative Example 3:

[0092] Ceramic wax blanks were placed in a sintering bowl and completely submerged in potassium sulfate with a particle size of 1200 μm as the wax removal powder. The submerged ceramic wax blanks were then sent into a furnace for high-temperature wax removal and sintering. After high-temperature sintering, the sintering bowl was removed after the furnace cooled to room temperature, and the sintered ceramic blanks and wax removal powder were separated using a sieve. The separated ceramic blanks were placed in an ultrasonic cleaner and washed with clean water for 20 minutes to obtain ceramic atomizing cores. The ceramic atomizing cores were then placed in a dryer and kept at 120°C for 2 hours.

[0093] Comparative Example 4:

[0094] Ceramic wax blanks were placed in a sintering bowl and completely submerged in 100% alumina with a particle size of 500μm as the wax removal powder. The submerged ceramic wax blanks were then sent into a furnace for high-temperature wax removal and sintering. After high-temperature sintering, the sintering bowl was removed after the furnace cooled to room temperature, and the sintered ceramic blanks and wax removal powder were separated using a sieve. The separated ceramic blanks were placed in an ultrasonic cleaner and washed with clean water for 20 minutes to obtain ceramic atomizing cores. The ceramic atomizing cores were then placed in a dryer and kept at 120℃ for 2 hours.

[0095] Table 1

[0096]

[0097]

[0098] Table 2

[0099]

[0100] Table 3

[0101]

[0102]

[0103] As shown above, Table 1 shows the effect of different dewaxing powders on the dewaxing powder coverage and ceramic atomizing core forming effect; Table 2 shows the effect of different water-soluble inorganic salt particle sizes on the dewaxing powder coverage and ceramic atomizing core forming effect; Table 3 shows the effect of different types of dewaxing powder, different ratios of sodium chloride to anti-caking agent, and different anti-caking agent components on the dewaxing powder coverage and powder agglomeration phenomenon.

[0104] Table 1 shows that replacing alumina with water-soluble inorganic salts as the dewaxing powder does not affect the final molding effect of the ceramic atomizing core, and can effectively prevent the dewaxing powder from adhering to the surface of the ceramic body, making it difficult to clean. This significantly reduces the coverage of the dewaxing powder on the surface of the ceramic body. The morphology of the ceramic atomizing core prepared in Comparative Example 1 under a scanning electron microscope is as follows: Figure 1 As shown, the morphology of the ceramic atomizing core prepared in Example 3 under a scanning electron microscope is as follows. Figure 2 As shown. Figure 1 The spherical particles are alumina particles adhered to the ceramic surface, with a coverage rate of 81.7%. Figure 2 In the middle, almost no sodium chloride particles are visible, and the coverage of the dewaxing powder on the ceramic surface is less than 1%.

[0105] Furthermore, the inventors investigated the effect of the particle size of water-soluble inorganic salts on the experiment. This paper uses potassium sulfate as an example (see Table 2). Table 2 shows that while the particle size of potassium sulfate has little effect on its adhesion to the ceramic surface, when the particle size is too small (less than 30 μm), paraffin wax cannot be completely removed; when the particle size is too large (greater than 1000 μm), it leads to deformation and cracking of the ceramic atomizing core. However, when the particle size of potassium sulfate is between 30 μm and 1000 μm, paraffin wax can be completely removed, deformation and cracking of the ceramic atomizing core can be avoided, and a lower wax removal powder coverage rate can be achieved.

[0106] It should be noted that, apart from potassium sulfate, other water-soluble inorganic salts mentioned in this case but not illustrated in specific examples can all reach the same conclusion as potassium sulfate. Here, potassium sulfate is only used as a specific example for illustration.

[0107] Furthermore, through numerous experiments, the inventors discovered that when sodium chloride was used as the dewaxing powder, agglomeration occurred after high-temperature sintering, while this phenomenon did not occur when other water-soluble inorganic salts mentioned, such as potassium sulfate and magnesium sulfate, were used. The inventors believe that this phenomenon may be related to its melting point, as sodium chloride has a lower melting point compared to other salts.

[0108] To address this problem, the inventors conducted numerous experiments and discovered that adding an appropriate amount of anti-caking agent could alleviate the issue. Furthermore, when the proportion of anti-caking agent is above 10%, it can effectively prevent sodium chloride from agglomerating after high temperature, allowing the dewaxing powder to be recycled (see Table 3 for details). The anti-caking agent can be calcium oxide, quartz powder, diatomaceous earth, silicon carbide, silicon nitride, zirconium oxide, etc.

[0109] Table 3 also shows that the best effect is achieved when the proportion of anti-caking agent is between 10% and 30%. The wax removal powder does not clump while the coverage of the wax removal powder is significantly reduced. The best effect is achieved when the ratio of sodium chloride to anti-caking agent is 9:1. Among them, the best effect is achieved when calcium oxide is used as the anti-caking agent.

[0110] Furthermore, it should be noted that only some embodiments are shown here, not all embodiments. Table 3 shows the effects of the addition ratio of calcium oxide, diatomaceous earth, silicon nitride, and quartz powder to sodium chloride on the powder when they are used as anti-caking agents. Specific embodiments of silicon carbide, zirconium oxide, etc. are not illustrated. However, it is understood that all the agents mentioned in this case, but not listed in specific embodiments, can achieve the same effect as calcium oxide, diatomaceous earth, silicon nitride, and quartz powder when used as anti-caking agents. That is, when the addition ratio of anti-caking agent is above 10%, it can effectively prevent the problem of sodium chloride clumping after high temperature, and the dewaxed powder can be recycled.

[0111] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0112] The above-described embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for removing wax from ceramic wax blanks, characterized in that, include: The ceramic wax blank is buried in wax-removing powder; the buried ceramic wax blank is then subjected to high-temperature wax removal and sintering to obtain a ceramic green blank. The dewaxing powder is used to bury the ceramic wax blank for dewaxing during sintering; the dewaxing powder includes a water-soluble substance, which is used to remove the dewaxing powder from the sintered ceramic wax blank through a water washing operation; the water-soluble substance is a water-soluble inorganic salt with a particle size of 30μm~1000μm.

2. The wax removal method according to claim 1, characterized in that, The water-soluble inorganic salt includes at least one of potassium sulfate, magnesium sulfate, sodium chloride, sodium sulfate, potassium chloride, sodium fluoride, and potassium fluoride.

3. The wax removal method according to claim 1, characterized in that, The dewaxing powder also includes an anti-caking agent, wherein the weight percentage of the anti-caking agent is not less than 10%.

4. The wax removal method according to claim 3, characterized in that, The weight percentage of the anti-caking agent is no more than 30%.

5. The wax removal method according to claim 3, characterized in that, The anti-caking agent includes at least one of calcium oxide, quartz powder, diatomaceous earth, silicon carbide, silicon nitride, and zirconium oxide.

6. The wax removal method according to claim 1, characterized in that, If the dewaxing powder includes water-soluble substances and anti-caking agents, the steps for preparing the dewaxing powder include: By weight percentage, water-soluble substances and not less than 10% of anti-caking agent are added to a mixer and mixed for 0.5h to 2h to obtain the dewaxing powder.

7. A method for preparing a ceramic atomizing core, characterized in that, include: The wax removal method described in claim 1 or 6 is used to remove wax from the ceramic blank to obtain a ceramic green blank; The ceramic blank is cleaned to obtain a ceramic atomizing core.

8. A ceramic atomizing core, characterized in that, The ceramic atomizing core is prepared using the preparation method described in claim 7.

9. An atomizer, characterized in that, Includes the ceramic atomizing core as described in claim 8.

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