Method for Preparing Porous Glass for Electronic Cigarette

Abstract

The present application discloses a method for preparing porous glass for an electronic cigarette, comprising the following steps: heating quartz glass to a molten state for granulation; mixing boron-silicon powder and quartz glass granules, and heating a mixture to a temperature between 600° C. to 900° C. to cover peripheries of the quartz glass granules with the boron-silicon powder; and sintering the quartz glass granules covered with boron-silicon in a preset mold to obtain the porous glass for the electronic cigarette. The technical solution according to the present application can greatly improve the smoking taste of the electronic cigarette.

Claims

1. A method for preparing porous glass for an electronic cigarette, characterized by comprising the following steps: heating quartz glass to a molten state for granulation, by which quartz glass granules obtained have smooth surfaces; mixing boron-silicon powder and the quartz glass granules, and heating a mixture to a temperature between 600° C. to 900° C. to cover peripheries of the quartz glass granules with the boron-silicon powder; and sintering the quartz glass granules covered with boron-silicon in a preset mold to obtain the porous glass for the electronic cigarette, wherein the boron-silicon powder contains at least one selected from the group consisting of SiO.sub.2, P.sub.2O.sub.5, B.sub.2O.sub.3, Li.sub.2O, ZnO, BaO, K.sub.2O, or Na.sub.2O.

2. The method for preparing the porous glass for the electronic cigarette according to claim 1, characterized in that: in the step of heating the quartz glass to the molten state for granulation, the quartz glass is heated to 1200° C. and then is subjected to spray granulation.

3. The method for preparing the porous glass for the electronic cigarette according to claim 2, characterized in that: after the quartz glass is subjected to the spray granulation, the quartz glass granules obtained have a diameter that is not more than 0.1 mm.

4. The method for preparing the porous glass for the electronic cigarette according to claim 1, characterized in that: in the step of mixing the boron-silicon powder and the quartz glass granules and heating the mixture to a temperature between 600° C. to 900° C. to cover the peripheries of the quartz glass granules with the boron-silicon powder, the mixture of the boron-silicon powder and the quartz glass granules is heated to 860° C.

5. The method for preparing the porous glass for the electronic cigarette according to claim 4, characterized in that: the mixture of the boron-silicon powder and the quartz glass granules is heated to 860° C. and maintained at said temperature for 20 min.

6. The method for preparing the porous glass for the electronic cigarette according to claim 1, characterized in that: in the step of sintering the quartz glass granules covered with boron-silicon in the preset mold to obtain the porous glass for the electronic cigarette, the quartz glass granules covered with the boron-silicon is heated to 600° C. for sintering.

7. The method for preparing the porous glass for the electronic cigarette according to claim 1, characterized in that: in the step of sintering the quartz glass granules covered with boron-silicon in the preset mold to obtain the porous glass for the electronic cigarette, the method further comprises: mixing the quartz glass granules covered the boron-silicon with an organic filler to control water absorption of the porous glass.

8. The method for preparing the porous glass for the electronic cigarette according to claim 7, characterized in that: the organic filler is plant fibers.

9. The method for preparing the porous glass for the electronic cigarette according to claim 1, characterized in that: surface roughness Ra of the quartz glass granules has a value within 0.006 μm.

Description

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

[0016] Embodiments of the present application will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, in which the same or similar reference signs indicate the same or similar elements or elements having the same or similar functions through the whole text. The following embodiments described with reference to the accompanying drawings are exemplary, and are intended to explain the present application, but should not be understood as a limit to the present application.

[0017] In the present application, unless otherwise clearly specified and defined, the terms such as “install”, “connect”, “connection”, and “fix” should be understood in a broad sense. For example, a connection may be a fixated connection, or a detachable connection, or an integrated connection; may be a mechanical connection, or an electrical connection; may be a direct connection, or an indirect connection via an intermediate medium, or an internal connection between two elements. For those of ordinary skills in the art, the specific meanings of the above terms in the present application can be understood in accordance with specific conditions.

[0018] In the present application, unless otherwise clearly specified and defined, a first feature being “above” or “below” a second feature may include that the first and second features are in direct contact, or the first and second features are not in direct contact but in contact via an additional feature therebetween. Moreover, the first feature being “above”, “on” or “over” the second feature includes that the first feature is directly or slantly above the second feature, or only indicates that the level of the first feature is higher than that of the second feature. the first feature being “below”, “under” or “underneath” the second feature includes that the first feature is directly or slantly below the second feature, or only indicates that the level of the first feature is lower than that of the second feature.

[0019] The present application will be further illustrate in detail below in combination with specific embodiments and the accompanying drawings.

Embodiment 1

[0020] A method for preparing porous glass for an electronic cigarette included the following steps: heating quartz glass to a molten state for granulation, by which quartz glass granules obtained had smooth surfaces, wherein the surface roughness Ra of the quartz glass granules preferably had a value within 0.006 μm; mixing boron-silicon powder and the quartz glass granules, and heating a mixture to a temperature between 600° C. to 900° C. to cover peripheries of the quartz glass granules with the boron-silicon powder; and sintering the quartz glass granules covered with boron-silicon in a preset mold to obtain the porous glass for the electronic cigarette, wherein the boron-silicon powder contains SiO.sub.2, P.sub.2O5, B.sub.2O.sub.3, Li.sub.2O, ZnO, BaO, K.sub.2O, and Na.sub.2O.

[0021] In this embodiment, in the step of heating the quartz glass to the molten state for granulation, the quartz glass was heated to 1200° C. and then was subjected to spray granulation.

[0022] In this embodiment, after the quartz glass was subjected to the spray granulation, the quartz glass granules obtained had a diameter that was not more than 0.1 mm.

[0023] In this embodiment, in the step of mixing the boron-silicon powder and the quartz glass granules and heating the mixture to a temperature between 600° C. to 900° C. to cover the peripheries of the quartz glass granules with the boron-silicon powder, the mixture of the boron-silicon powder and the quartz glass granules was heated to 860° C.

[0024] During the production, the mixture of the boron-silicon powder and the quartz glass granules was preferably heated to 860° C. and maintained at said temperature for 20 min. At this temperature, the porous glass had good toughness and excellent anti-cracking effect, and might withstand the extreme temperature difference of more than 300° C. based on tests. Compared with the products in the mart, the porous glass was greatly improved.

[0025] In this embodiment, in the step of sintering the quartz glass granules covered with boron-silicon in the preset mold to obtain the porous glass for the electronic cigarette, the quartz glass granules covered with the boron-silicon was heated to 600° C. for sintering.

[0026] In this embodiment, in the preset mold to obtain the porous glass for the electronic cigarette, the method further included: mixing the quartz glass granules covered the boron-silicon with an organic filler to control the water absorption and pore size of the porous glass. The water absorption of the porous glass determines its capacity of storing the cigarette tar, and the pore size determines an absorption velocity for the cigarette tar. Based on this, the pore size can be controlled by providing the organic fillers of different diameters, thereby controlling the absorption velocity for the cigarette tar. In such a way, different smoking tastes can be obtained to meet the requirements of different products for the tar capacity and the tar absorption velocity.

[0027] The quartz glass was made of various pure natural molten quartz (such as crystal and quartz sand). It had an extremely small coefficient of linear expansion, which was 1/10- 1/20 that of common glass, and had excellent thermal shock resistance.

[0028] The method for preparing the porous glass for the electronic cigarette according to the present application is applicable to the manufacturing of the quartz glass granules covered with a boron-silicon material. The porous glass is endowed with the characteristics of the quartz porous glass, and also has the characteristics of good flame resistance and high physical strength. Compared with the common glass, the porous glass has the advantage of no toxic and side effect, is applicable to the atomizer of the electronic cigarette; and it is greatly improved in properties such as mechanical property, thermal stability, water resistance, alkali resistance, and acid resistance, and is applicable to the cigarette tar at the temperature within a variety of heating temperature range.

[0029] In this embodiment, the organic filler was plant fibers. In the description of the specification, the description of reference terms such as “an implementation mode”, “some implementation modes”, “an embodiment”, “some embodiments”, “example”, “specific example”, or “some examples” is intended to indicate the inclusion of a specific feature, structure, material, or characteristic as described in combination with said embodiment or example into at least one embodiment or example of the present application. In the specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific feature, structure, material, or characteristic can be combined in an appropriate manner in any one or more embodiments or examples.

[0030] The description above further illustrates the present application in detail in conjunction with the specific embodiments, and it should not be deemed that the specific implementation of the present application is limited to these illustrations. For those of ordinary skills in the art to which the present application belongs, several simple deductions or substitutions can also be made without departing from the conception of the present application.