INFRARED RADIATION SLURRY AND INFRARED RADIATION HEATING ELEMENT BASED ON SAME

Abstract

The present disclosure discloses an infrared radiation slurry and an infrared radiation heating element based on the infrared radiation slurry. Raw materials of the infrared radiation slurry include high infrared radiance materials, a conductive material and a substrate adhesive. The raw materials are evenly mixed, coated on a quartz glass tube, and carbonized to obtain the infrared radiation heating element. The present disclosure utilizes the compounded infrared radiation slurry to form a coating on a glass substrate with uniform components, uniform and controllable resistance, high conversion efficiency of electrothermal radiation, and strong adhesion, thereby achieving excellent performance of the obtained infrared radiation heating element.

Claims

1. An infrared radiation slurry, comprising the following raw materials in mass percentage: a high infrared radiance material: 30-75%, a conductive material: 20-55%, and a substrate adhesive: 5-30%.

2. The infrared radiation slurry according to claim 1, wherein the high infrared radiance material is at least two of graphene, nano nickel ferrite, nano manganese ferrite, nano zinc ferrite, nano iron oxide, nano titanium oxide and nano tin oxide.

3. The infrared radiation slurry according to claim 1, wherein the conductive material is a high-temperature carbonizable biological substrate.

4. The infrared radiation slurry according to claim 3, wherein the conductive material is at least one of cyclodextrin, maltodextrin, phenolic resin, microcrystalline cellulose and lignin.

5. The infrared radiation slurry according to claim 1, wherein the substrate adhesive is at least one of water glass and silica sol.

6. An infrared radiation heating element, wherein an infrared radiation coating is formed on the infrared radiation heating element using the infrared radiation slurry according to claim 1.

7. The infrared radiation heating element according to claim 6, wherein the high infrared radiance material is at least two of graphene, nano nickel ferrite, nano manganese ferrite, nano zinc ferrite, nano iron oxide, nano titanium oxide and nano tin oxide.

8. The infrared radiation heating element according to claim 6, wherein the conductive material is a high-temperature carbonizable biological substrate.

9. The infrared radiation heating element according to claim 8, wherein the conductive material is at least one of cyclodextrin, maltodextrin, phenolic resin, microcrystalline cellulose and lignin.

10. The infrared radiation heating element according to claim 6, wherein the substrate adhesive is at least one of water glass and silica sol.

11. A method for preparing the infrared radiation heating element according to claim 6, wherein the method comprises following steps: step 1: adding deionized water to a mixture of the high infrared radiance material, the conductive material and the substrate adhesive and mixing them evenly to prepare the infrared radiation slurry; step 2: applying the infrared radiation slurry onto a quartz glass tube, placing the quartz glass tube in a carbonization furnace for carbonization, such that the infrared radiation slurry is shaped into the infrared radiation coating, to obtain the infrared radiation heating element.

12. The method according to claim 11, wherein specific method of step 1 is: placing the high infrared radiance materials, the conductive material and the substrate adhesive in a ball mill tank, adding deionized water and ball mill beads to mix evenly to obtain the infrared radiation slurry; or first, adding appropriate amount of deionized water into the high infrared radiance materials and uniformly dispersing it by ultrasound to obtain suspension; adding deionized water into the conductive material and the subtract adhesive and uniformly dispersing it by ultrasound; then, dropwise dripping the suspension while ultrasound is applied. After the dripping is completed, adding it into the ball mill tank to mix evenly, so as to obtain the infrared radiation slurry.

13. The method according to claim 11, wherein in step 1, an addition amount of the deionized water accounts for 1-3 times of the total mass of the high infrared radiance materials, the conductive layer material and the substrate adhesive.

14. The method according to claim 12, wherein in step 1, an addition amount of the deionized water accounts for 1-3 times of the total mass of the high infrared radiance materials, the conductive layer material and the substrate adhesive.

15. The method according to claim 11, wherein in step 2, conditions for the carbonization are: in a first stage, raising temperature to 150° C. at a heating rate of 3-10° C./min, and maintaining the temperature for 10-20 minutes; in a second stage, raising the temperature at a heating rate of 5-20° C./min to 280-320° C., and maintaining the temperature for 5-10 minutes; in a third stage, raising the temperature to 600-1000° C. at a heating rate of 10-30° C./min, and maintaining the temperature for 0.5-5 hours; after carbonization, cooling the infrared radiation heating element inside the furnace and taking out the infrared radiation heating element.

Description

BRIEF DESCRIPTION OF DRAWINGS

[0026] FIG. 1 shows resistance values of sections of infrared radiation heating elements made of infrared radiation slurries prepared according to examples.

DESCRIPTION OF EMBODIMENTS

[0027] The following provides a detailed explanation of the examples of the present disclosure. The examples are implemented based on the technical solutions of the present disclosure, and provide detailed implementation methods and specific operation processes. However, the scope of protection of the present disclosure is not limited to the following examples.

Example 1

[0028] The infrared radiation heating element of this example is prepared as follows:

[0029] Step 1: weighing 12% of graphene, 20% of nano manganese ferrite, 18% of nano tin oxide, 22% of microcrystalline cellulose, 10% of cyclodextrin, 10% of water glass and 8% of silica sol respectively in mass percentage, mixing them together, placing them in a ball mill tank, adding deionized water in an amount of 1.3 times the total mass of the above raw materials and 30 g of ball mill beads, and then ball milling them for 1.5 hours to obtain an infrared radiation slurry.

[0030] Step 2: applying the infrared radiation slurry to an outer wall of a cylindrical quartz glass tube, placing the cylindrical quartz glass tube in a carbonization furnace for carbonization, so that the infrared radiation slurry is shaped into an infrared radiation coating layer, i.e., obtaining an infrared radiation heating element. The conditions for the carbonization are as follows: in a first stage, raising temperature to 150° C. at a heating rate of 5° C./min, and maintaining the temperature for 10 minutes; in a second stage, raising the temperature to 290° C. at a heating rate of 15° C./min, and maintaining the temperature for 5 minutes; in a third stage, raising the temperature to 850° C. at a heating rate of 30° C./min, and maintaining the temperature for 2 hours; after the carbonization, cooling the infrared radiation heating element inside the furnace, and taking it out.

[0031] After the infrared radiation heating element is prepared and obtained using the slurry, the infrared radiation heating element is placed in the tobacco heating device to heat the tobacco material. When smoking with the above tobacco heating device, a larger amount of smoke and more adequate strength are produced. The conversion efficiency of electrothermal radiation of the heating element is 68% (national standard is 50%) as shown in Table 1, indicating high heating efficiency of infrared heating. The distribution of resistance values of sections of the heating element is shown in FIG. 1, and the distribution of resistance values is uniform.

Example 2

[0032] The infrared radiation heating element of this example is prepared as follows:

[0033] Step 1: weighing 20% of graphene, 10% of nano ferric oxide, 15% of nano zinc ferrite and 5% of nano titanium oxide respectively in mass percentage, adding an appropriate amount of deionized water and uniformly dispersing them by ultrasound to obtain a suspension; 28% of microcrystalline cellulose, 10% of water glass, 12% of silica sol and deionized water in an amount of 1 time the total mass of the above raw materials, and dispersing uniformly by ultrasound, and then dripping the suspension while ultrasound is applied, and after the dripping is completed, adding them into the ball mill tank, and adding 30 g of ball mill beads for ball-milling for 2 hours, so as to obtain an infrared radiation slurry.

[0034] Step 2: applying the infrared radiation slurry to an outer wall of a cylindrical quartz glass tube, placing the cylindrical quartz glass tube in a carbonization furnace for carbonization, so that the infrared radiation slurry is shaped into an infrared radiation coating layer, i.e., obtaining an infrared radiation heating element. The conditions for the carbonization are as follows: in a first stage, raising temperature to 150° C. at a heating rate of 3° C./min, and maintaining the temperature for 15 minutes; in a second stage, raising the temperature to 290° C. at a heating rate of 15° C./min, and maintaining the temperature for 10 minutes; in a third stage, raising the temperature to 950° C. at a heating rate of 30° C./min, and maintaining the temperature for 2 hours; after the carbonization, cooling the infrared radiation heating element inside the furnace, and taking it out.

[0035] After the infrared radiation heating element is prepared and obtained using the slurry, the infrared radiation heating element is placed in the tobacco heating device to heat the tobacco material. When smoking with the above tobacco heating device, a larger amount of smoke and more adequate strength are produced. The conversion efficiency of electrothermal radiation of the heating element is 73% (national standard is 50%), as shown in Table 1, indicating high heating efficiency of infrared heating. The distribution of resistance values in sections of the heating element is as shown in FIG. 1, and the distribution of resistance values is uniform.

TABLE-US-00001 TABLE 1 conversion efficiency of electrothermal radiation and average resistance value for infrared radiation heating elements obtained from examples Conversion efficiency of Average resistance Sample No. electrothermal radiation value (Ω) Example 1 68% 5.60 Example 2 73% 5.90