WO2018192058A1

WO2018192058A1 - Methods for preparing microporous ceramic and microporous ceramic heating bar

Info

Publication number: WO2018192058A1
Application number: PCT/CN2017/085802
Authority: WO
Inventors: 张海波; 丁毅
Original assignee: 深圳市卓力能电子有限公司
Priority date: 2017-04-20
Filing date: 2017-05-25
Publication date: 2018-10-25
Also published as: CN107010934A; CN107010934B

Abstract

The invention provides methods for preparing microporous ceramic and a microporous ceramic heating bar. The method for preparing microporous ceramic comprises the steps of preparing materials, grinding, screening, mixing, grouting molding, de-waxing and sintering. In the method for preparing the microporous ceramic, in the step of grouting molding, an electric heating wire of a hollow coil is arranged in a specific mold for molding to form a microporous ceramic heating bar. According to the microporous ceramic heating body, the heating wire and the microporous ceramic are sintered into a whole by adopting grouting molding, so that the heating wire is embedded into the microporous ceramic, the contact area with tobacco tar is increased, the possibility of local dry-burning can be avoided, and the reduction degree and taste of tobacco tar can be improved. The heating wire and the microporous ceramic are sintered into a whole to improve the uniformity of products, and it is convenient to operate. The stability during electric heating works can be effectively ensured, and local dry-burning can be avoided. The heating efficiency of the electric heating wire is improved, and the smoke generation time is shortened.

Description

Method for preparing microporous ceramic and microporous ceramic heating rod

Technical field

The invention relates to the field of microporous ceramics, in particular to a preparation method of a microporous ceramic heating rod as a heater for heating and atomizing in an electronic cigarette aerosolizer.

Background technique

At present, the traditional electronic cigarette atomizer mainly has three ways of heating and atomizing, one of which adopts electric heating wire wrapped with glass fiber rope for heating atomization; the other uses manual heating of electric heating wire to the surface of microporous ceramic rod; The wire is embedded in the inner hole of the microporous ceramic rod, and the inner hole is approximately 2-5 mm and the outer diameter is 4-8 mm. The glass fiber rope, the organic cotton and the microporous ceramic rod are all oil guiding bodies, and the atomized smoke oil is heated by the heating wire. The first two methods are because the heating wire is wound up, resulting in a small contact area between the heating wire and the oil guiding body. It is easy to be in contact with the place, forming a local dry burning situation, which seriously affects the mouthfeel of the smoked oil, and the third way, since the microporous ceramic itself is a heat absorbing body, a part of the heat is used during the heating process. Heating the ceramic body, the temperature rise of the whole heating wire is 1-2S slower than the first two methods, and the time of smoking once is about 2-3S, so it seriously affects the amount of single-smoke smoke, and can not provide a good experience for consumers. .

Summary of the invention

The invention provides a method for preparing microporous ceramics, and provides a preparation method of microporous ceramic heating rods, in view of the deficiencies of the three kinds of heating wires used in the current electronic cigarette atomizer.

The technical solution adopted by the present invention for achieving the object thereof is: a preparation method of microporous ceramics, comprising the steps of compounding, grinding, sieving, mixing, grouting, waxing, and sintering;

In the batching step, the ingredients are as follows:

Quartz sand powder 50-80;

Sepiolite powder 5-15;

Zeolite powder 1-5;

Silica powder 2-5;

Kaolin powder 1-3;

Zinc oxide 0.3-1;

Boron oxide 0.5-1;

Magnesium oxide 1-3;

Pore former powder 3-10;

Paraffin wax 10-30;

Surfactant 0.3-1.

Further, in the above preparation method of the microporous ceramic: in the grinding step, the uniformly mixed powder is added to the grinding ball for dry ball milling for 8-12 hours. In the mixing step, the paraffin wax is liquefied, treated with an active agent, and then the sieved powder is added for mixing. In the wax discharging step, the semi-finished product formed by grouting is put into a sintering crucible, and is completely flooded with the wax discharging powder, and then placed in a wax discharging kiln for wax discharge; the wax discharge temperature is 200-800 degrees, and the time is 10 - 36 hours. In the sintering step, the waxed product is placed in a high temperature furnace for high temperature sintering at a sintering temperature of 800 to 1200 degrees for a period of 8 to 24 hours. The pore former is a powder of PS microspheres or corn starch or wood carbon powder or wood chips or a mixed powder of one or several kinds. The surfactant is oleic acid or stearic acid.

The invention provides a preparation method of a microporous ceramic heating rod, which comprises the above-mentioned preparation step of the microporous ceramic, wherein in the grouting forming step, the heating wire of the hollow ring is loaded into a predetermined mold to perform molding. .

The invention provides a microporous ceramic heating body with a new manufacturing process, which uses a grouting method to sinter the heating wire and the microporous ceramic into one body, so that the heating wire is embedded in the microporous ceramic, and the contact area with the smoke oil is increased, thereby avoiding The possibility of local dry burning improves the degree of reduction and taste of the smoked oil.

Further, in the above method for preparing a microporous ceramic heating rod, the outer side of the electric heating wire hollow ring abuts against the inner wall of the mold. The sintered microporous ceramic heating rod has an outer diameter of 1.8-2.2 mm, a heating wire resistance of 1.5-3.0 ohm, and a cross-sectional area of 2.8-3.8 mm2.

In the microporous ceramic heating rod of the invention, the heating wire and the microporous ceramic are co-fired to improve the consistency of the product and facilitate the operation. Effectively ensure the stability of electric heating work, avoiding local dry burning. Improve the heating efficiency of the heating wire, shorten the time of smoking, and improve the smoking experience of users.

The present invention will be described in detail below with reference to specific embodiments.

DRAWINGS

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a structural view showing a first embodiment of the present invention.

detailed description

Embodiment 1 This embodiment is a method for preparing a heating and microporous ceramic heating rod in an atomizer, wherein the microporous ceramic heating rod prepared by the method, the hot wire and the microporous ceramic are co-fired. In one, it improves product consistency and is easy to operate. Effectively ensure the stability of electric heating work, avoiding local dry burning. Improve the heating efficiency of the heating wire, shorten the time of smoking, and improve the smoking experience of users.

The preparation method of the microporous ceramic heating rod comprises the following steps:

1. According to the ingredient list shown in Table 1, the percentage in the ingredient list of Table 1 is the mass percentage.

Table 1 ingredient list

序号Serial number	成分ingredient	比例(％)proportion(%)
11	石英砂Quartz sand	50-8050-80
22	海泡石粉Sepiolite powder	5-155-15
33	沸石粉Zeolite powder	1-51-5
44	二氧化硅Silica	2-52-5
55	高岭土Kaolin	1-31-3
66	氧化锌Zinc oxide	0.3-10.3-1
77	氧化硼Boron oxide	0.5-10.5-1
88	氧化镁Magnesium oxide	1-31-3
99	造孔剂Pore former	3-103-10
1010	石蜡paraffin	10-3010-30
1111	表面活性剂Surfactant	0.3-10.3-1
合计total		100100

In the above table, the pore forming agent is a kind of powder, which is one kind or a mixture of several kinds of PS microspheres, corn starch, wood carbon powder or wood chips, and the pore forming agent is added to the powder mixture. A substance that, upon sintering, relies on its volatilization to form the desired type and number of pores in the final product. The pore-forming agent is prepared by adding a pore-forming agent to a ceramic batch, occupying a certain space in the body by using a pore-forming agent, and then sintering, and the pore-forming agent leaves the substrate to form pores to prepare a foamed ceramic. The shape and size of the pore former particles determine the shape and size of the pores of the ceramic foam material. The molding methods mainly include molding, extrusion, isostatic pressing, rolling, injection and slurry casting. By this method, materials having complicated shapes and different pore structures can be obtained.

Generally used as a pore-forming agent is a biological material. In this embodiment, one or several kinds of mixed powders of PS microspheres, corn starch, wood carbon powder or wood chips are selected.

The surfactant may be oleic acid or stearic acid.

2. Ball milling:

The uniformly mixed powder is added to the grinding ball for dry ball milling for 8-12 hours.

3. Screening:

The milled material was sieved through a 100-250 mesh screen.

4. Mixing

The paraffin wax is liquefied by a heating cylinder, and the powder is added to the paraffin for mixing. Before the powder is added, the active agent is used for treatment to avoid separation from the paraffin.

5. Grouting molding:

The heating wire of the hollow ring is placed in a specific mold and placed on a grouting machine for molding. Note that in the cavity of the mold, the hollow ring of the heating wire is close to the inner wall of the mold. Thus, in the fabricated microporous ceramic heating rod, the heating wire is not embedded in the microporous ceramic rod, nor is it bound to the outside of the microporous ceramic rod, but is embedded in the surface of the microporous rod. As shown in FIG. 1, the heating wire 2 is mounted on the surface of the microporous rod 1. In this step, a pre-prepared mold is used, which is set according to the electronic cigarette. The shape of the microporous ceramic heating rod, in the mold, the hollow ring portion of the heating wire is placed in the mold, and the two leads of the heating wire are led out of the mold, in order to ensure that the electric heating wire on the microporous ceramic heating rod is molded in the future The surface of the microporous ceramic rod, therefore, the hollow ring portion of the heating wire should be close to the inner wall of the mold in the mold. Currently, the shape of the microporous ceramic rod used in the electronic cigarette is generally designed to be a standard cylindrical or rice grain shape.

6. Discharge:

The formed semi-finished product is placed in a sintered crucible, and is completely flooded with the wax-discharging powder, and then placed in a wax-discharging kiln for wax discharge. The wax discharge temperature is 200-800 degrees and the time is 10-36 hours.

7. Sintering:

The waxed product is placed in a high temperature furnace for high temperature sintering at a sintering temperature of 800-1200 degrees for a period of 8-24 hours.

7. Clear powder:

The sintered product is cleaned with ultrasonic waves.

Clean the qualified products for microporous oil test and resistance test.

Compared with the traditional electric heating wire wrapped glass fiber rope for heating the atomized body, the porous ceramic used in the scheme does not form the risk that the fiber particles are adsorbed in the human lung during the working process, and heats under the same power condition. The silk heating process is more stable, and there is no higher peak, which causes the pyrotechnics to crack and produce some harmful substances.

Compared with the manual winding of the heating wire onto the surface of the microporous ceramic rod, the contact area of the heating wire and the smoke oil is multiplied, thereby avoiding the possibility of partial dry burning of the heating wire, improving the reducing degree and taste of the tobacco oil, and Under the condition of the same power, the heating wire heating process is more stable, there is no higher peak, so that the pyrotechnics cracking produces some harmful substances, and there is no phenomenon that the heating wire is not tightly contacted with the ceramic, and the consistency of the product is improved.

Compared with the electric heating wire embedded in the inner hole of the microporous ceramic rod, the inner hole is limited to 2-4 mm, the outer diameter is 4.2-8 mm, and the cross section of the whole ceramic is 10.66-37.4 mm. ² ; The finished product of the sintering process is as shown on the right, the heating wire is embedded in the surface of the porous ceramic rod, the outer diameter of the whole sintered is 1.8-2.2mm, the resistance of the heating wire is 1.5-3.0 ohm, and the cross-sectional area is 2.8. -3.8mm ² , that is, in the case of the same length, the volume is only 1/10-1/4. The microporous ceramic itself is an endothermic body, which absorbs part of the heat during the heating of the heating wire and affects the heating efficiency of the heating wire. Therefore, compared with the integrated ceramic heating wire embedded in the interior, the invention is embedded in the outside. The integrated ceramic electric heating wire has a heating efficiency of 4-10 times, which greatly shortens the time of smoking, and can effectively improve the smoking experience.

Claims

The invention discloses a preparation method of microporous ceramics, which comprises the steps of compounding, grinding, sieving, mixing, grouting, waxing and sintering; wherein:

In the batching step, the ingredients are as follows:
The method for preparing a microporous ceramic according to claim 1, wherein:

In the grinding step, the uniformly mixed powder is added to the grinding ball for dry ball milling for 8-12 hours.
The method for preparing a microporous ceramic according to claim 1, wherein in the mixing step, the paraffin wax is liquefied, treated with an active agent, and then the sieved powder is added for mixing.
The method for preparing a microporous ceramic according to claim 1, wherein in the step of discharging the wax, the semi-finished product formed by injection molding is placed in a sintered crucible, and the whole is discharged by using the wax-discharging powder, and then placed. It is discharged into the wax kiln for wax discharge; the wax discharge temperature is 200-800 degrees, and the time is 10-36 hours.
The method for preparing a microporous ceramic according to claim 1, wherein in the sintering step, the waxed product is placed in a high temperature furnace for high temperature sintering, and the sintering temperature is 800-1200 degrees. It is 8-24 hours.
The method for preparing a microporous ceramic according to claim 1, wherein the pore former is one or a mixture of a plurality of PS microspheres, corn starch, wood carbon powder, and wood chips. not.
The method for preparing a microporous ceramic according to claim 1, wherein the surfactant is oleic acid or stearic acid.
A method for preparing a microporous ceramic heating rod, comprising: the method for preparing a microporous ceramic according to claim 1, wherein in the step of forming a grout, the heating wire of the hollow ring is filled into a prescribed Molding is carried out inside the mold.
The method for preparing a microporous ceramic heating rod according to claim 8, wherein the electric heating wire hollow ring The outer side abuts against the inner wall of the mold.
The method for preparing a microporous ceramic heating rod according to claim 8, wherein the outer diameter of the sintered microporous ceramic heating rod is between 1.8 and 2.2 mm, and the electric heating wire has a resistance of 1.5 to 3.0. Europe, the cross-sectional area is 2.8-3.8mm 2 .