WO2023000573A1 - 微孔陶瓷雾化芯及其制备方法 - Google Patents

微孔陶瓷雾化芯及其制备方法 Download PDF

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WO2023000573A1
WO2023000573A1 PCT/CN2021/133939 CN2021133939W WO2023000573A1 WO 2023000573 A1 WO2023000573 A1 WO 2023000573A1 CN 2021133939 W CN2021133939 W CN 2021133939W WO 2023000573 A1 WO2023000573 A1 WO 2023000573A1
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parts
atomizing core
microporous ceramic
powder
mesh
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PCT/CN2021/133939
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French (fr)
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WO2023000573A8 (zh
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陈平
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深圳市华诚达精密工业有限公司
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Priority to EP21950811.6A priority Critical patent/EP4317113A1/en
Priority to KR1020237037266A priority patent/KR20230164131A/ko
Publication of WO2023000573A1 publication Critical patent/WO2023000573A1/zh
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Definitions

  • the invention relates to the technical field of atomization, in particular to a microporous ceramic atomization core and a preparation method thereof.
  • the current ceramic atomizing cores have major problems such as large atomized particles, liquid leakage during use or transportation, and high-temperature sintering causes the atomizing core to shrink and deform, which greatly limits the development of ceramic atomizing cores.
  • the technical problem to be solved by the present invention is to provide a microporous ceramic atomizing core with high porosity and improved atomization effect and a preparation method thereof.
  • the technical solution adopted by the present invention to solve the technical problem is to provide a microporous ceramic atomizing core, including raw materials and their mass parts as follows: 10-50 parts of main material, 0-40 parts of ceramic powder, sintering aid 10-50 parts, 0-20 parts of pore-forming agent, 20-50 parts of paraffin and 0.1-2.0 parts of surfactant;
  • the host material includes at least one of diatomite, silica airgel powder and porous boron nitride; the particle size of the host material is 200 mesh-1500 mesh.
  • the ceramic powder includes at least one of quartz sand, silicon nitride, silicon powder and corundum, with a particle size of 100 mesh to 1500 mesh.
  • the sintering aid is metal oxide or glass powder, with a particle size of 200 mesh to 2000 mesh and an incipient melting temperature of 300°C to 600°C.
  • the metal oxide is at least one of magnesium oxide, titanium dioxide, and niobium oxide.
  • the glass powder is non-lead-based low-temperature melting glass powder, rare element-based low-temperature melting glass powder or boron-based low-melting glass powder.
  • the pore-forming agent includes at least one of wheat flour, PS microspheres and chaff flour, with a particle size of 200 mesh to 1000 mesh.
  • the paraffin wax is semi-refined or refined paraffin wax with a melting point of 40°C-100°C.
  • the surfactant includes at least one of sorbitan fatty acid ester, polysorbate and oleic acid.
  • the present invention also provides a preparation method of the microporous ceramic atomizing core, comprising the following steps:
  • Beneficial effects of the present invention through the addition of the main material with micropores and high specific surface, the porosity and liquid-locking ability of the atomizing core can be improved, the atomization liquid can be fully atomized, and the use experience of the atomizing core can be enhanced. feel.
  • Fig. 1 is the SEM figure of diatomite in the present invention
  • Fig. 2 is a SEM image of the microporous ceramic atomizing core of the present invention.
  • the microporous ceramic atomizing core of the present invention includes raw materials and their mass parts as follows: 10-50 parts of main material, 0-40 parts of ceramic powder, 10-50 parts of sintering aid, 10-20 parts of pore-forming agent, 20-50 parts of paraffin and 0.1-2.0 parts of surfactant.
  • the main material is selected with micropores and a high specific surface material, which can improve the liquid locking effect in the atomizing core and make the atomized particles fine.
  • the host material includes at least one of diatomite, silicon dioxide airgel powder and porous boron nitride.
  • the particle size of the main material is 200 mesh-1500 mesh.
  • the main component of diatomite is silicic acid, with countless pores on the surface, which has the advantages of strong adsorption performance, light bulk density, uniform fineness, neutral pH value, non-toxicity, and good mixing uniformity.
  • the SEM image of diatomite is shown in Figure 1. From the microscopic characterization of the diatomite powder particles shown in the figure, it can be known that diatomite has uniform micropores and a large specific surface.
  • Silica airgel powder is an airgel material with low density, low thermal conductivity, high specific surface area and high adsorption capacity prepared by normal pressure drying method; porous boron nitride is a new type of non-oxide porous material, the inner Composed of interconnected or closed pores, it has a high specific surface area and rich pore structure, and the pore size can be adjusted according to practical applications.
  • the ceramic powder as the skeleton material of the microporous ceramic atomizing core, may include at least one of quartz sand, silicon nitride, silicon powder and corundum.
  • the preferred particle size of the ceramic powder is 100 mesh to 1500 mesh.
  • the sintering aid is metal oxide or glass powder, the particle size is 200-2000 mesh, and the initial melting temperature is 300°C-600°C.
  • the metal oxide may be at least one of magnesium oxide, titanium dioxide, niobium oxide and the like.
  • the glass powder can be non-lead-based low-temperature melting glass powder, rare element-based low-temperature melting glass powder or boron-based low-melting glass powder.
  • the pore-forming agent is at least one of wheat flour, PS microspheres and chaff powder, and the particle size is 200-1000 mesh.
  • Paraffin wax is semi-refined or refined paraffin wax with a melting point of 40°C-100°C.
  • the surfactant is at least one of sorbitan fatty acid ester (Span), polysorbate (Tween) and oleic acid.
  • the preparation method of the microporous ceramic atomizing core of the present invention comprises the following steps:
  • hot die casting molding can be used, and dry pressing molding can also be used.
  • the green body is placed in a sintering furnace, and sintered at 500°C-800°C to obtain a microporous atomizing core by one-time sintering.
  • the preparation method of the microporous ceramic atomizing core of the present invention is not limited to the above-mentioned hot die casting or dry pressing, and other molding methods for preparing the atomizing core can be used.
  • the SEM image of the microporous ceramic atomizing core of the present invention is shown in Figure 2. It can be seen from the figure that, except for the pores formed by particle accumulation and pore-forming agent, the addition of the main material greatly increases the micropores of the atomizing core. While ensuring the liquid inlet, the capillary action of the microporous atomizing core is greatly improved, and the liquid storage and liquid locking ability is greatly improved, so that the atomizer can ensure sufficient oil supply when the atomizer is working, and make the atomized particles fine.
  • each raw material is as follows: 80 parts of diatomite, 50 parts of glass powder, 50 parts of paraffin, and 0.5 part of oleic acid; the above raw materials are mixed and then hot-pressed, and sintered at 500°C-800°C to form microporous fog chemical core.
  • Diatomaceous earth is changed into silicon dioxide airgel powder, and the rest is the same as Example 1.
  • Diatomaceous earth was changed into porous boron nitride, and the rest was the same as in Example 1.
  • Raw material increases 10 parts of wheat flour on the basis of embodiment 1, all the other are identical with embodiment 1.
  • Raw material increases 20 parts of wheat flour on the basis of embodiment 1, all the other are identical with embodiment 1.
  • Embodiment 6 is a diagrammatic representation of Embodiment 6
  • each raw material is as follows: 40 parts of diatomite, 10 parts of silicon powder, 50 parts of glass powder, 20 parts of wheat flour, 40 parts of paraffin, and 0.5 part of oleic acid; °C for one sintering to form a microporous atomizing core.
  • Embodiment 7 is a diagrammatic representation of Embodiment 7:
  • each raw material is as follows: 40 parts of diatomite, 20 parts of silicon powder, 40 parts of glass powder, 20 parts of wheat flour, 40 parts of paraffin, and 0.5 part of oleic acid; °C for one sintering to form a microporous atomizing core.
  • Embodiment 8 is a diagrammatic representation of Embodiment 8
  • each raw material is as follows: 40 parts of diatomite, 20 parts of quartz sand, 40 parts of glass powder, 20 parts of wheat flour, 40 parts of paraffin, and 0.5 part of oleic acid; °C for one sintering to form a microporous atomizing core.
  • Embodiment 9 is a diagrammatic representation of Embodiment 9:
  • each raw material is as follows: 40 parts of diatomite, 20 parts of corundum, 40 parts of glass powder, 20 parts of wheat flour, 40 parts of paraffin, 0.5 part of oleic acid; the above raw materials are mixed and then hot-pressed and molded at 500°C-800°C The next sintering will form a microporous atomizing core.
  • each raw material is as follows: 40 parts of silica airgel powder, 20 parts of silicon powder, 40 parts of glass powder, 20 parts of wheat flour, 40 parts of paraffin, and 0.5 part of oleic acid; Sintering at 500°C-800°C to form a microporous atomizing core.
  • each raw material is as follows: 40 parts of porous boron nitride, 20 parts of silicon powder, 40 parts of glass powder, 20 parts of wheat flour, 40 parts of paraffin, and 0.5 part of oleic acid; Sintering at 800°C to form a microporous atomizing core.
  • each raw material is as follows: 70 parts of corundum powder, 30 parts of glass powder, 20 parts of wheat flour, 30 parts of paraffin, 0.5 part of oleic acid; the above raw materials are mixed and then hot die-casted, and sintered at 500°C-800°C to form Microporous atomizing core.
  • each raw material is as follows: 70 parts of quartz sand, 30 parts of glass powder, 20 parts of wheat flour, 30 parts of paraffin, 0.5 part of oleic acid; after mixing the above raw materials, they are hot press-casted and sintered at 500°C-800°C to form Microporous atomizing core.
  • Example Porosity/% Water absorption/% Average pore size/um Example 1 56 55 7.0032 Example 2 55 56 8.0523
  • Example 3 52 55 7.6628
  • Example 4 58 59 8.2216
  • Example 5 63 72 13.6496
  • Example 6 58 60 14.2363
  • Example 7 60
  • Example 8 59
  • Example 9 59
  • 62 16.3326
  • Example 10 60
  • Example 11 58 58 13.7986 Comparative example 1 50
  • 43 30.6536 Comparative example 2 52 47 32.3750
  • the present invention uses diatomaceous earth and other main materials With the addition of , the porosity of the microporous atomizing core is significantly increased, and the average pore diameter can be kept at a relatively stable and small level, which ensures that the atomizing core has a better liquid-locking ability.

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Abstract

本发明公开了一种微孔陶瓷雾化芯及其制备方法，微孔雾化芯包括原料及其质量份数如下：主体材料10-50份、陶瓷粉体0-40份、助烧剂10-50份、造孔剂0-20份、石蜡20-50份以及表面活性剂0.1-2.0份；所述主体材料包括硅藻土、二氧化硅气凝胶粉末以及多孔氮化硼中的至少一种；所述主体材料的粒度为200目-1500目。本发明的微孔陶瓷雾化芯，通过自带微孔、具有高比表面的主体材料的加入，提高雾化芯的孔隙率及锁液能力，确保雾化液的充分雾化，增强雾化芯的使用体验感。

Description

微孔陶瓷雾化芯及其制备方法 技术领域
本发明涉及雾化技术领域，尤其涉及一种微孔陶瓷雾化芯及其制备方法。
背景技术
陶瓷雾化芯作为电子烟等雾化领域的核心部件，随着该领域的发展，人们对陶瓷雾化芯的要求就不仅仅是雾化，其雾化效果也成为了评判雾化芯的一个重要指标。
目前的陶瓷雾化芯存在着雾化颗粒大、使用或运输过程中漏液、高温烧结使雾化芯收缩变形等主要问题，极大程度上限制了陶瓷雾化芯的发展。
发明内容
本发明要解决的技术问题在于，提供一种孔隙率高、提高雾化效果的微孔陶瓷雾化芯及其制备方法。
本发明解决其技术问题所采用的技术方案是：提供一种微孔陶瓷雾化芯，包括原料及其质量份数如下：主体材料10-50份、陶瓷粉体0-40份、助烧剂10-50份、造孔剂0-20份、石蜡20-50份以及表面活性剂0.1-2.0份；
所述主体材料包括硅藻土、二氧化硅气凝胶粉末以及多孔氮化硼中的至少一种；所述主体材料的粒度为200目-1500目。
优选地，所述陶瓷粉体包括石英砂、氮化硅、硅粉和刚玉中的至少一种， 粒度为100目-1500目。
优选地，所述助烧剂为金属氧化物或玻璃粉，粒度为200目-2000目，始熔温度为300℃-600℃。
优选地，所述金属氧化物为氧化镁、二氧化钛、氧化铌中至少一种。
优选地，所述玻璃粉为非铅系低温熔融玻璃粉、稀有元素系低温熔融玻璃粉或硼系低熔点玻璃粉。
优选地，所述造孔剂包括小麦粉、PS微球和谷壳粉中至少一种，粒度为200目-1000目。
优选地，所述石蜡为半炼或精炼石蜡，熔点为40℃-100℃。
优选地，所述表面活性剂包括失水山梨醇脂肪酸酯、聚山梨酯和油酸中至少一种。
本发明还提供一种微孔陶瓷雾化芯的制备方法，包括以下步骤：
S1、按质量份数将各原料混合，压制形成坯体；
S2、将所述坯体置于烧结炉中，在500℃-800℃下进行烧结。
本发明的有益效果：通过自带微孔、具有高比表面的主体材料的加入，提高雾化芯的孔隙率及锁液能力，确保雾化液的充分雾化，增强雾化芯的使用体验感。
在制备时，以低温(500℃-800℃)烧结成型，制备条件简单易实施。
附图说明
下面将结合附图及实施例对本发明作进一步说明，附图中：
图1是本发明中硅藻土的SEM图；
图2是本发明的微孔陶瓷雾化芯的SEM图。
具体实施方式
为了对本发明的技术特征、目的和效果有更加清楚的理解，现对照附图详细说明本发明的具体实施方式。
本发明的微孔陶瓷雾化芯，包括原料及其质量份数如下：主体材料10-50份、陶瓷粉体0-40份、助烧剂10-50份、造孔剂10-20份、石蜡20-50份以及表面活性剂0.1-2.0份。
其中，主体材料选择自带微孔、具有高比表面的材料，在雾化芯中能提高锁液效果并使雾化颗粒细腻。该主体材料包括硅藻土、二氧化硅气凝胶粉末以及多孔氮化硼中的至少一种。主体材料的粒度为200目-1500目。
主体材料中，硅藻土主要成分是硅酸质，表面有无数细孔，具有吸附性能强、容重轻、细度均匀、pH值中性无毒及混合均匀性好等优点。硅藻土的SEM图如图1所示，从图中示出的硅藻土粉体颗粒的显微形貌表征可知，硅藻土分布着均匀的微孔，比表面较大。
二氧化硅气凝胶粉末是利用常压干燥方法制备的低密度、低导热系数、高比表面、高吸附性的气凝胶材料；多孔氮化硼是一种新型非氧化物多孔材料，内部由相互贯通或封闭的孔洞构成，具有高比表面积和丰富的孔道结构，孔径尺寸可根据实际应用进行调控。
陶瓷粉体作为微孔陶瓷雾化芯的骨架材料，可包括石英砂、氮化硅、硅粉和刚玉中的至少一种。陶瓷粉体优选粒度为100目-1500目。
助烧剂为金属氧化物或玻璃粉，粒度为200目-2000目，始熔温度为300℃-600℃。金属氧化物可为氧化镁、二氧化钛、氧化铌等中至少一种。玻璃粉可为非铅系低温熔融玻璃粉、稀有元素系低温熔融玻璃粉或硼系低熔点玻璃 粉。
造孔剂为小麦粉、PS微球及谷壳粉中至少一种，粒度为200目-1000目。
石蜡为半炼或精炼石蜡，熔点为40℃-100℃。
表面活性剂为失水山梨醇脂肪酸酯(司盘)、聚山梨酯(吐温)和油酸中至少一种。
本发明的微孔陶瓷雾化芯的制备方法，包括以下步骤：
S1、按质量份数将各原料混合，压制形成坯体。
对于压制成型，可以采用热压铸成型，也可以干压成型。
S2、将坯体置于烧结炉中，在500℃-800℃下进行烧结，以一次烧结方式得到微孔雾化芯。
可以理解地，本发明的微孔陶瓷雾化芯的制备方法不限于上述热压铸或干压，其他成型制备雾化芯的方法均可采用。
本发明的微孔陶瓷雾化芯的SEM图如图2所示，从图可看出，雾化芯除了由颗粒堆积及造孔剂形成的孔外，主体材料的加入使微孔大幅增加，在确保进液的同时，极大的改善了微孔雾化芯的毛细作用，储液锁液能力大大提升，使雾化器工作时保证充分供油，并且使雾化颗粒细腻。
以下通过具体实施例对本发明作进一步说明。
实施例1：
各原料份数如下：硅藻土80份，玻璃粉50份，石蜡50份，油酸0.5份；将上述原料混合后进行热压铸成型，于500℃-800℃下一次烧结，形成微孔雾化芯。
实施例2：
硅藻土改为二氧化硅气凝胶粉末，其余与实施例1相同。
实施例3：
硅藻土改为多孔氮化硼，其余与实施例1相同。
实施例4：
原料在实施例1基础上增加小麦粉10份，其余与实施例1相同。
实施例5：
原料在实施例1基础上增加小麦粉20份，其余与实施例1相同。
实施例6：
各原料份数如下：硅藻土40份，硅粉10份，玻璃粉50份，小麦粉20份，石蜡40份，油酸0.5份；将上述原料混合后进行热压铸成型，于500℃-800℃下一次烧结，形成微孔雾化芯。
实施例7：
各原料份数如下：硅藻土40份，硅粉20份，玻璃粉40份，小麦粉20份，石蜡40份，油酸0.5份；将上述原料混合后进行热压铸成型，于500℃-800℃下一次烧结，形成微孔雾化芯。
实施例8：
各原料份数如下：硅藻土40份，石英砂20份，玻璃粉40份，小麦粉20份，石蜡40份，油酸0.5份；将上述原料混合后进行热压铸成型，于500℃-800℃下一次烧结，形成微孔雾化芯。
实施例9：
各原料份数如下：硅藻土40份，刚玉20份，玻璃粉40份，小麦粉20份，石蜡40份，油酸0.5份；将上述原料混合后进行热压铸成型，于500℃-800℃下一次烧结，形成微孔雾化芯。
实施例10：
各原料份数如下：二氧化硅气凝胶粉末40份，硅粉20份，玻璃粉40份，小麦粉20份，石蜡40份，油酸0.5份；将上述原料混合后进行热压铸成型，于500℃-800℃下一次烧结，形成微孔雾化芯。
实施例11：
各原料份数如下：多孔氮化硼40份，硅粉20份，玻璃粉40份，小麦粉20份，石蜡40份，油酸0.5份；将上述原料混合后进行热压铸成型，于500℃-800℃下一次烧结，形成微孔雾化芯。
比较例1：
各原料份数如下：刚玉粉70份，玻璃粉30份，小麦粉20份，石蜡30份，油酸0.5份；将上述原料混合后进行热压铸成型，于500℃-800℃下一次烧结，形成微孔雾化芯。
比较例2：
各原料份数如下：石英砂70份，玻璃粉30份，小麦粉20份，石蜡30份，油酸0.5份；将上述原料混合后进行热压铸成型，于500℃-800℃下一次烧结，形成微孔雾化芯。
对实施例1-11及比较例1-2得到的微孔雾化芯的孔隙率(阿基米德排水法)及吸水率进行测试，测试结果如下表1。
表1
实施例 孔隙率/％ 吸水率/％ 平均孔径/um
实施例1 56 55 7.0032
实施例2 55 56 8.0523
实施例3 52 55 7.6628
实施例4 58 59 8.2216
实施例5 63 72 13.6496
实施例6 58 60 14.2363
实施例7 60 60 16.7973
实施例8 59 59 15.3656
实施例9 59 62 16.3326
实施例10 60 59 12.3362
实施例11 58 58 13.7986
比较例1 50 43 30.6536
比较例2 52 47 32.3750
由表1结果可知，相比于比较例的雾化芯的孔隙率偏小、孔径偏大、雾化芯储液能力低及易产生漏油等问题，本发明中通过硅藻土等主体材料的加入，使得微孔雾化芯的孔隙率明显升高，且平均孔径能保持在一个相对平稳偏小的水平，确保了雾化芯有较佳的锁液能力。
以上所述仅为本发明的实施例，并非因此限制本发明的专利范围，凡是利用本发明说明书及附图内容所作的等效结构或等效流程变换，或直接或间接运用在其他相关的技术领域，均同理包括在本发明的专利保护范围内。

Claims (9)

  1. 一种微孔陶瓷雾化芯，其特征在于，包括原料及其质量份数如下：主体材料10-50份、陶瓷粉体0-40份、助烧剂10-50份、造孔剂0-20份、石蜡20-50份以及表面活性剂0.1-2.0份；
    所述主体材料包括硅藻土、二氧化硅气凝胶粉末以及多孔氮化硼中的至少一种；所述主体材料的粒度为200目-1500目。
  2. 根据权利要求1所述的微孔陶瓷雾化芯，其特征在于，所述陶瓷粉体包括石英砂、氮化硅、硅粉和刚玉中的至少一种，粒度为100目-1500目。
  3. 根据权利要求1所述的微孔陶瓷雾化芯，其特征在于，所述助烧剂为金属氧化物或玻璃粉，粒度为200目-2000目，始熔温度为300℃-600℃。
  4. 根据权利要求3所述的微孔陶瓷雾化芯，其特征在于，所述金属氧化物为氧化镁、二氧化钛、氧化铌中至少一种。
  5. 根据权利要求3所述的微孔陶瓷雾化芯，其特征在于，所述玻璃粉为非铅系低温熔融玻璃粉、稀有元素系低温熔融玻璃粉或硼系低熔点玻璃粉。
  6. 根据权利要求1所述的微孔陶瓷雾化芯，其特征在于，所述造孔剂包括小麦粉、PS微球和谷壳粉中至少一种，粒度为200目-1000目。
  7. 根据权利要求1所述的微孔陶瓷雾化芯，其特征在于，所述石蜡为半炼或精炼石蜡，熔点为40℃-100℃。
  8. 根据权利要求1所述的微孔陶瓷雾化芯，其特征在于，所述表面活性剂包括失水山梨醇脂肪酸酯、聚山梨酯和油酸中至少一种。
  9. 一种权利要求1-8任一项所述的微孔陶瓷雾化芯的制备方法，其特征在于，包括以下步骤：
    S1、按质量份数将各原料混合，压制形成坯体；
    S2、将所述坯体置于烧结炉中，在500℃-800℃下进行烧结。
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