Method for inducing quartz muffle tube crystallization

Abstract

The invention provides a method for inducing crystallization of a quartz muffle tube, which comprises the following steps: S1, preheating the muffle tube to 950-1100 DEG C, and keeping the temperature; s2, irradiating the muffle tube by using laser; and S3, after laser irradiation is completed, the muffle tube is cooled to the normal temperature. The traditional crystallization method may cause non-uniform crystallization, however, according to the application, the energy distribution of a local area is accurately controlled through a laser irradiation technology, so that the crystallization process of the quartz muffle tube is more uniform, and the overall performance of the quartz muffle tube is improved.

Description

Technical Field

[0001] This invention belongs to the field of laser surface heat treatment technology, specifically relating to a method for inducing crystallization in quartz muffle tubes. Background Technology

[0002] Quartz muffle tubes are a widely used material in high-temperature experiments and industrial production, and their performance largely depends on their internal crystallization state. Traditional crystallization methods typically rely on temperature control and chemical treatment, but these methods suffer from problems such as uneven crystallization, low efficiency, and easy introduction of impurities. Summary of the Invention

[0003] To address the shortcomings of existing technologies, this invention provides a method for inducing crystallization in quartz muffle tubes. Laser-induced crystallization enables high-precision local control, avoiding problems such as uneven crystallization, low efficiency, and easy introduction of impurities.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: This invention provides a method for inducing crystallization in a quartz muffle tube, comprising the following steps: S1. Preheat the muffle tube to 950-1100℃ and maintain this temperature; S2. Irradiate the muffle tube with a laser; S3. After laser irradiation is completed, cool the muffle tube to room temperature.

[0005] Preferably, in step S1, the muffle tube is placed on a heating furnace for heating.

[0006] Preferably, in step S2, a CO2 laser is used for laser irradiation.

[0007] Preferably, in step S2, the laser extends into the muffle tube and irradiates its inner wall.

[0008] Preferably, in step S2, the laser pulse width is 10 μs and the power density is 1000 W / cm². 2 .

[0009] Preferably, in step S2, the laser irradiation time is 10-15 minutes.

[0010] Preferably, in step S2, the temperature of the muffle tube is monitored in real time by a sensor during laser irradiation to prevent the temperature of the muffle tube from exceeding 1100°C.

[0011] Preferably, in step S3, the cooling rate of the muffle tube is controlled to be 8-10°C / min.

[0012] Compared with the prior art, the beneficial effects of the present invention are as follows: (1) Traditional crystallization methods may result in uneven crystallization. However, this application uses laser irradiation technology to precisely control the energy distribution in local areas, making the crystallization process of the quartz muffle tube more uniform, thereby improving its overall performance.

[0013] (2) In traditional crystallization methods, temperature changes and chemical reactions often cause quartz muffle tubes to break easily during processing. However, this application preheats the muffle tube to 950-1100℃ and maintains this temperature, which ensures that the quartz muffle tube maintains a stable temperature environment during laser irradiation, reduces thermal stress caused by temperature differences, and thus effectively avoids the problem of breakage.

[0014] (3) Traditional methods usually require a long time to complete the crystallization process, while the method of this application, combined with laser irradiation, can accelerate the crystallization process and thus improve the overall production efficiency.

[0015] (4) Compared with traditional chemical treatment methods, the present invention can reduce the interference of external substances and avoid the introduction of impurities by using laser irradiation, thereby improving the purity and performance of quartz muffle tubes. Detailed Implementation

[0016] The present invention will now be described in further detail with reference to specific embodiments, so that those skilled in the art can more clearly understand the present invention.

[0017] Quartz muffle tubes are a widely used material in high-temperature experiments and industrial production, and their performance largely depends on their internal crystallization state. Traditional crystallization methods typically rely on temperature control and chemical treatment, but these methods suffer from problems such as uneven crystallization, low efficiency, and easy introduction of impurities.

[0018] To solve the above-mentioned technical problems, the present invention provides a method for inducing crystallization in a quartz muffle tube, comprising the following steps: S1. Preheat the muffle tube to 950-1100℃ and maintain this temperature; S2. Irradiate the muffle tube with a laser; S3. After laser irradiation is completed, cool the muffle tube to room temperature.

[0019] Traditional crystallization methods can lead to uneven crystallization. This application, however, utilizes laser irradiation technology to precisely control the energy distribution in localized areas, resulting in a more uniform crystallization process for the quartz muffle tube and thus improving its overall performance. In traditional crystallization methods, temperature changes and chemical reactions often cause the quartz muffle tube to break during processing. This application, by preheating the muffle tube to 950-1100℃ and maintaining this temperature, ensures a stable temperature environment during laser irradiation, reducing thermal stress caused by temperature differences and effectively preventing breakage. Traditional methods typically require a long time to complete the crystallization process, while this application's method, combined with laser irradiation, accelerates the process and improves overall production efficiency. Compared to traditional chemical treatment methods, this invention, using laser irradiation, reduces interference from external substances and avoids the introduction of impurities, thereby improving the purity and performance of the quartz muffle tube.

[0020] Further, in step S1, the muffle tube is placed on a heating furnace for heating.

[0021] Furthermore, in step S2, a CO2 laser is used for laser irradiation.

[0022] Furthermore, in step S2, the laser extends into the muffle tube and irradiates its inner wall.

[0023] Furthermore, in step S2, the laser pulse width is 10 μs and the power density is 1000 W / cm². 2 .

[0024] Furthermore, in step S2, the laser irradiation time is 10-15 minutes.

[0025] Furthermore, in step S2, during laser irradiation, the temperature of the muffle tube is monitored in real time by a sensor to prevent the temperature of the muffle tube from exceeding 1100°C.

[0026] Furthermore, in step S3, the cooling rate of the muffle tube is controlled to be 8-10℃ / min.

[0027] Example 1 This embodiment provides a method for inducing crystallization in a quartz muffle tube. The specific steps are as follows: Select a quartz muffle tube with a diameter of 100 mm and a length of 500 mm. Install it in a heating furnace. Preheat to 1000℃ and maintain a stable temperature. Use a CO2 laser with a pulse width of 10 μs and a power density of 1000 W / cm². 2Adjust the optical focusing system to ensure the laser evenly covers the inner wall of the quartz muffle tube. Begin laser irradiation for 10 minutes, during which the temperature is monitored in real time using a temperature sensor (to prevent the internal temperature of the quartz muffle tube from exceeding 1000℃). After crystallization, slowly cool to room temperature at a rate of 10℃ / min.

[0028] Comparative Example 1 This comparative example provides a method for inducing crystallization in a quartz muffle tube. The specific steps are the same as in Example 1, except that the quartz muffle tube is preheated to 700°C in a heating furnace and the temperature is kept stable.

[0029] Comparative Example 2 This comparative example provides a method for inducing crystallization in a quartz muffle tube. The specific steps are the same as in Example 1, except that no preheating is performed, and laser irradiation is carried out directly at room temperature.

[0030] Comparative Example 3 This comparative example provides a method for inducing crystallization in a quartz muffle tube. The specific steps are the same as in Example 1, except that laser irradiation is not performed, and the tube is directly treated at 1000°C for 15 minutes.

[0031] Comparative Example 4 This comparative example provides a method for inducing crystallization in a quartz muffle tube. The specific steps are the same as in Example 1, except that after crystallization, the tube is slowly cooled to room temperature at a rate of 30°C / min.

[0032] Performance Tests and Results 1000 quartz muffle tubes were treated using the methods of Example 1 and Comparative Examples 1-4 respectively, and the breakage rate of each method was calculated. The results are shown in Table 1.

[0033] Table 1

[0034] In conclusion, as shown in Table 1, the method of Example 1 resulted in the highest yield of quartz muffle tube crystallization.

[0035] After treating 10 quartz muffle tubes (undamaged, intact quartz muffle tubes) each using the methods of Example 1 and Comparative Examples 1-4, the hardness of each quartz muffle tube was tested using Vickers hardness test after treatment. The hardness of the 10 quartz muffle tubes in the same group was taken as the average value, and the results are shown in Table 2.

[0036] Table 2

[0037] Among the criteria for judging hardness, level 1 is the softest (talc), and level 10 is the hardest (diamond).

[0038] In conclusion, as shown in Table 2, the crystallized quartz muffle tube obtained in Example 1 has the highest hardness and is more durable.

[0039] All other raw materials or structures not specifically described in this invention already exist in the prior art and can be purchased directly from the market.

[0040] The above are merely preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A method for inducing crystallization in a quartz muffle tube, characterized in that, Includes the following steps: S1. Preheat the muffle tube to 950-1100℃ and maintain this temperature; S2. Irradiate the muffle tube with a laser; S3. After laser irradiation is completed, cool the muffle tube to room temperature.

2. The method for inducing crystallization in a quartz muffle tube according to claim 1, characterized in that, In step S1, the muffle tube is placed on a heating furnace for heating.

3. The method for inducing crystallization in a quartz muffle tube according to claim 1, characterized in that, In step S2, a CO2 laser is used for laser irradiation.

4. The method for inducing crystallization in a quartz muffle tube according to claim 1, characterized in that, In step S2, the laser extends into the muffle tube and irradiates its inner wall.

5. The method for inducing crystallization in a quartz muffle tube according to claim 1, characterized in that, In step S2, the laser pulse width is 10 μs and the power density is 1000 W / cm². 2 .

6. The method for inducing crystallization in a quartz muffle tube according to claim 1, characterized in that, In step S2, the laser irradiation time is 10-15 minutes.

7. The method for inducing crystallization in a quartz muffle tube according to claim 1, characterized in that, In step S2, during laser irradiation, the temperature of the muffle tube is monitored in real time by a sensor to prevent the temperature of the muffle tube from exceeding 1100°C.

8. The method for inducing crystallization in a quartz muffle tube according to claim 1, characterized in that, In step S3, the cooling rate of the muffle tube is controlled to be 8-10℃ / min.

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