KR102153833B1 - Method for manufacturing environment-friendly high irradiance ultraviolet lamp and environment-friendly high irradiance ultraviolet lamp - Google Patents

Abstract

Disclosed are a method for manufacturing an environmentally-friendly high-power UV lamp and an environmentally-friendly high-power UV lamp. The method for manufacturing the environmentally-friendly high-power UV lamp may comprise the steps of: producing indium amalgam by mixing indium and mercury at a temperature of 156°C or higher; applying gold paste to the inside of the quartz tube and treating the quartz tube with heat between 800°C and 1150°C to deposit a gold coating layer inside the quartz tube; and depositing indium amalgam by placing and treating the produced indium amalgam on the gold coating layer with heat.

Description

TECHNICAL FIELD [Method for manufacturing environment-friendly high irradiance ultraviolet lamp and environment-friendly high irradiance ultraviolet lamp}

The present invention relates to a method of manufacturing an environment-friendly high-power ultraviolet lamp and to an environment-friendly high-power ultraviolet lamp, and more particularly, to an environment-friendly high-power ultraviolet lamp manufacturing method capable of emitting high-power ultraviolet light, and an environment-friendly high-power ultraviolet lamp.

Ultraviolet lamps are lamps that emit ultraviolet rays and are used in various fields such as water purification, sterilization treatment, sterilization, curing of photo chemical resist, photo ashing, and light cleaning.

An ultraviolet lamp has a light-emitting tube made of quartz, glass, etc. that transmits ultraviolet light, electrodes are installed at both ends of the discharge space inside the light-emitting tube, and mercury (Hg) and an inert gas (for example, , Argon (Ar), etc.) is enclosed. When current is applied to an electrode in an ultraviolet lamp, discharge occurs in the filament of the electrode. At this time, due to the heat generated from the filament, electrons pop out and mercury and inert gas move actively. Mercury vapor and electrons collide and generate ultraviolet rays. These UV lamps are classified into low pressure, medium pressure, and high pressure according to the discharge pressure.

In particular, the dominant ultraviolet ray generation efficiency [the total amount of ultraviolet rays (W) / lamp power consumption (W)] generated in a low-pressure ultraviolet lamp is 20% to 30%, and the ultraviolet rays are 253.7 nm by mercury, which accounts for 85% to 90%. It is emitted at an effective wavelength, and is emitted at an effective wavelength of 184.9 nm by an inert gas that occupies less than 10%. Here, the 253.7 nm wavelength has a low wavelength energy of 112.5 kcal/mol, so it is mainly used for sterilization of harmful pathogens.

The mercury amalgam is accommodated in the ultraviolet lamp as described above, that is, in a state that is freely movable in the discharge space. At this time, when the ultraviolet lamp is arranged in a vertical direction, the lifespan is shortened by about 10%. In addition, the intensity of the ultraviolet rays emitted from the ultraviolet lamp changes according to the temperature change. For example, an ultraviolet lamp exhibits optimal performance at a temperature of 20°C to 40°C, but exhibits an ultraviolet intensity reduced by about 40% at a temperature of 0°C or a temperature of 60°C or higher. That is, the ultraviolet lamp has a certain life and performance, but there are some restrictions. Due to this, the mercury amalgam is also fixed in the space. However, when the discharge space is damaged, the mercury amalgam is exposed and contaminates the surrounding environment.

An object to be solved by the present invention is to provide an environment-friendly high-power ultraviolet lamp manufacturing method and environment-friendly high-power ultraviolet lamp capable of preventing exposure to mercury amalgam and generating ultraviolet rays with high output.

Another problem to be solved by the present invention is to provide an environment-friendly high-power UV lamp manufacturing method and environment-friendly high-power UV lamp in which indium amalgam deposited inside a quartz tube is not separated even with a strong impact.

In order to achieve the problem to be solved, the method of manufacturing an environment-friendly high-power UV lamp according to the present invention comprises the steps of preparing indium amalgam by mixing indium and mercury at a temperature of 156°C or higher, applying gold paste to the inside of a quartz tube, It may include heat treatment between ℃ and 1150 ℃, depositing a gold coating layer inside the quartz tube, and depositing the indium amalgam by placing the prepared indium amalgam on the gold coating layer and heat treatment.

The indium and the mercury may be mixed in a weight ratio of 89:11.

The indium amalgam may be cut into a size of 1 to 2 g and placed on the gold coating layer.

In the step of depositing the indium amalgam, heat treatment may be performed at a temperature of 250°C to 300°C.

In the step of depositing the indium amalgam, heat treatment may be performed at a temperature of 250°C to 300°C for 30 minutes or more.

In order to achieve the above other object to be solved, the environment-friendly high-power ultraviolet lamp according to the present invention may be an environment-friendly high-power ultraviolet lamp manufactured by the method of manufacturing an environment-friendly high-power ultraviolet lamp according to the present invention.

According to the environment-friendly high-power UV lamp manufacturing method and environment-friendly high-power UV lamp according to the present invention, exposure of mercury amalgam can be prevented by using indium amalgam instead of mercury amalgam. By not being separated from the quartz tube by means of, it is possible to provide a safer environment-friendly high-power ultraviolet lamp.

1 is a flow chart showing an exemplary embodiment of a method of manufacturing an environment-friendly high-power UV lamp according to the present invention.
Figure 2 is a flow chart showing the implementation of a preferred embodiment of the method for producing indium amalgam according to the present invention.
3 is a view showing a state diagram according to the composition ratio of indium and mercury.
4 is a view showing a photograph of indium amalgam prepared according to the present invention.
5 is a flow chart showing a procedure of a preferred embodiment of a method of depositing a gold coating layer inside a quartz tube according to the present invention.
6 is a view showing a photograph of a quartz tube coated with gold paste.
7 is a view showing an embodiment in which a gold coating layer is formed after heat treatment in a temperature range of 800°C to 1150°C.
8 is a view showing an embodiment in which a gold coating layer is formed after heat treatment at a temperature exceeding 1150°C.
9 is a view showing a photograph of an example of a gold paste heat treatment process using a gas torch.
10 is a view showing an embodiment in which a gold coating layer is formed using a gas torch.
11 is a diagram showing an example in which volatilization occurs in a portion of the gold coating layer.
12 is a view showing an example of depositing indium amalgam by heat treatment at 250 ℃.
13 is a diagram showing an example of depositing indium amalgam by heat treatment at 280°C.
14 is a diagram showing an example in which indium amalgam is deposited by heat treatment at a temperature exceeding 300°C.
15 is a view showing an example in which indium amalgam is deposited by heat treatment at 250°C from another direction.
16 is a view showing an example in which indium amalgam is deposited by heat treatment at 280°C from another direction.
17 is a view showing an example in which indium amalgam is deposited by heat treatment at a temperature exceeding 300° C. from another direction.
18 is a diagram showing an example in which indium amalgam deposited by impact is separated.

The terms or words used in this specification and claims should not be construed as being limited to their usual or dictionary meanings, and the inventor may appropriately define the concept of terms in order to describe his own invention in the best way. It should be interpreted as a meaning and concept consistent with the technical idea of the present invention based on the principle that there is.

Therefore, the embodiments described in the present specification and the configurations shown in the drawings are only the most preferred embodiments of the present invention, and do not represent all the technical spirit of the present invention, and thus various equivalents that can replace them at the time of application It should be understood that there may be water and variations.

Hereinafter, a method of manufacturing an eco-friendly high-power UV lamp and an eco-friendly high-power UV lamp according to the present invention will be described in detail.

1 is a flow chart showing an exemplary embodiment of a method of manufacturing an environment-friendly high-power UV lamp according to the present invention.

Referring to FIG. 1, the method of manufacturing an environment-friendly high-power UV lamp according to the present invention includes the steps of manufacturing indium amalgam (S100), depositing a gold coating layer inside the quartz tube (S110), and depositing indium amalgam. It may include (S120).

Figure 2 is a flow chart showing the implementation of a preferred embodiment of the method for producing indium amalgam according to the present invention.

Referring to FIG. 2, the method of manufacturing indium amalgam according to the present invention includes the steps of introducing indium and mercury into a crucible (S200), applying heat to the crucible (S210), and mixing in a liquid state (S220), And it may include a step of cooling (S230).

In the step of introducing indium and mercury into the crucible (S200), the weights of indium and mercury are measured, and indium and mercury may be added to the crucible at 89:11 wt% (weight ratio). Here, the crucible may be a high purity alumina crucible.

3 is a view showing a state diagram according to the composition ratio of indium and mercury.

Referring to FIG. 3, in the step of applying heat to the crucible (S210 ), indium and mercury may be completely dissolved in a liquid state by putting the crucible in an oven heated to 130° C. or higher. At this time, as shown in the state diagram according to the composition ratio of indium and mercury shown in FIG. 3, the melting point at the weight ratio of indium to mercury 89:11 is around 130° C., but the melting point of indium is 156° C. for uniform and quick mixing. It is preferable to proceed with the production of indium amalgam at the above temperature.

In the mixing step (S220) in the liquid ecology, the crucible may be shaken to mix indium and mercury dissolved in a liquid state throughout the step S210. Here, by shaking the crucible for 1 to 2 minutes, indium and mercury dissolved in a liquid state may be well mixed.

4 is a view showing a photograph of indium amalgam prepared according to the present invention.

In the cooling step (S230), the indium-mercury mixture solution completely mixed in step S220 may be cooled to room temperature to prepare indium amalgam. The indium amalgam shown in FIG. 4 is prepared by the method of manufacturing the indium amalgam according to the present invention shown in FIG. 2.

The step of preparing indium amalgam (S100) includes the steps of introducing indium and mercury into the crucible (S200), applying heat to the crucible (S210), mixing in a liquid state (S220), and cooling (S230) It may include.

5 is a flow chart showing a procedure of a preferred embodiment of a method of depositing a gold coating layer inside a quartz tube according to the present invention.

5, the method of depositing a gold coating layer inside a quartz tube according to the present invention includes cleaning the quartz tube (S300), drying the quartz tube (S310), and attaching gold paste (S320), It may include re-drying the quartz tube (330) and heat treating the quartz tube (S340).

In the step of cleaning the quartz tube (S300), the quartz tube may be ultrasonically cleaned using alcohol. Here, the quartz tube may be either coated with alumina or not coated with alumina.

In the step of drying the quartz tube (S310), the quartz tube washed in step S300 may be put into an oven and dried. Here, it can be dried for 30 minutes by putting the quartz tube in an oven heated to 80°C or higher.

6 is a view showing a photograph of a quartz tube coated with gold paste.

Referring to FIG. 6, in step S320 of attaching gold paste, gold paste may be attached by applying gold paste to the inside of the quartz tube dried in step S310 using a brush. 6 shows a state after coating gold paste on the inside of the quartz tube by a painting method using a brush, and it can be seen that the attached gold paste is dark brown. Gold paste may be manufactured by Ted Pella in the United States or manufactured by High Purity Chemical in Japan.

In the step of redrying the quartz tube (S330), the quartz tube to which the gold paste is attached in step S320 may be put into an oven and dried again. Here, it can be re-dried for 30 minutes by putting the quartz tube in an oven heated to 80°C or higher.

In the step of heat-treating the quartz tube (S340), the quartz tube re-dried in step S330 may be heat-treated between 800°C and 1150°C to deposit a gold coating layer inside the quartz tube. Here, the quartz tube can be heat treated using an electric furnace or a portable gas torch. In the case of heat treatment at a temperature of less than 800° C., the gold coating layer may have a weak deposition strength, and at a temperature of more than 1150° C., the gold paste may volatilize and the gold coating layer may not be properly formed.

7 is a view showing an embodiment in which a gold coating layer is formed after heat treatment in a temperature range of 800°C to 1150°C.

7 is a photograph of a result of heat treatment of a quartz tube with gold paste attached at a temperature range of 800° C. or higher using an electric furnace. It can be seen that the color of the gold paste, which was dark brown before heat treatment, has changed to golden color in the temperature range of 800℃ or higher.

8 is a view showing an embodiment in which a gold coating layer is formed after heat treatment at a temperature exceeding 1150°C.

Referring to FIG. 8, a result of heat treatment of a quartz tube with gold paste in a temperature range of more than 1150°C using an electric furnace was photographed. It can be seen that volatilization of gold occurs as the color of the coated gold gradually fades at a temperature exceeding 1150°C.

9 is a view showing a photograph of an example of a gold paste heat treatment process using a gas torch.

Referring to FIG. 9, in the step of heat-treating the quartz tube (S340), in order to perform a more simple gold coating process, heat treatment may be performed using a portable gas torch instead of an electric furnace. As shown in FIG. 9, a portable gas (Gas) torch may heat-treat a quartz tube with gold paste attached thereto. In particular, since a gas torch using a portable butane gas can be heated to about 1200°C or higher, it is very useful to heat-treat gold paste by properly controlling the heat treatment time.

10 is a view showing an embodiment in which a gold coating layer is formed using a gas torch.

10 shows the appearance of a specimen of a gold-coated layer after heat treatment using a portable gas torch, and shows the same results as in the case of using an electric furnace. Therefore, these results can be confirmed that the gold coating layer can be formed inside the quartz tube through a very simple heat treatment process.

11 is a diagram showing an example in which volatilization occurs in a portion of the gold coating layer.

When the heat treatment process using the gas torch is not properly performed, it is necessary to appropriately control the heating time using the gas torch because a part where the gold paste volatilizes occurs, as in the left part of the gold coating layer shown in FIG. need. This control can be achieved by stopping the heating immediately after the occurrence of volatilization because the volatilization of the gold coating layer can be visually confirmed during heating.

The step of depositing a gold coating layer inside the quartz tube (S110) includes washing the quartz tube (S300), drying the quartz tube (S310), attaching gold paste (S320), and redrying the quartz tube. It may include step 330 and heat treatment of the quartz tube (S340).

In the step of depositing the indium amalgam (S120), the indium amalgam may be deposited by placing the indium amalgam prepared in step S100 on the gold coating layer deposited in the quartz tube in step S110 and heat treatment. Here, the indium amalgam prepared in step S100 may be cut to a size of 1 to 2 g. Since the indium amalgam prepared in step S100 has excellent ductility and malleability, it can be easily cut into a desired size and shape using a stationery knife.

Place the cut indium amalgam on the gold coating layer of the quartz tube, put the quartz tube in an oven heated to a temperature of 160°C or higher to completely dissolve the indium amalgam, and then slowly shake the quartz tube to spread the melted liquid evenly on the gold coating layer. After making it, the quartz tube can be heat-treated in the electric furnace at a temperature ranging from 250°C to 300°C. Preferably, heat treatment may be performed for 30 minutes or more at a temperature range of 250°C to 300°C in an electric furnace.

12 is a diagram showing an example of depositing indium amalgam by heat treatment at 250° C., FIG. 13 is a diagram showing an example of depositing indium amalgam by heat treatment at 280° C., and FIG. 14 It is a diagram showing an example of depositing indium amalgam, FIG. 15 is a diagram showing an example of depositing indium amalgam by heat treatment at 250°C, and FIG. 16 is a view showing an example of depositing indium amalgam by heat treatment at 280°C. It is a view shown in another direction, and FIG. 17 is a view showing an example in which indium amalgam is deposited by heat treatment at a temperature exceeding 300°C.

12 to 17, when heat treatment at 250°C, the surface portion of the indium amalgam is very clean, but when heat treatment at 280°C, it can be seen that the surface portion of the indium amalgam changed to gold. It is a reaction layer formed when the gold coating layer outside the contact surface of the indium amalgam rises above the liquid indium amalgam, and can be solved by making the area of the indium amalgam larger than that of the gold coating.

However, in the case of heat treatment exceeding 300°C, the surface portion of the indium amalgam is black. This is caused by oxidation of the indium amalgam. If the heat treatment exceeds 300°C, the heat treatment temperature is too high.

In the case of heat treatment at 250°C to less than 280°C, the indium amalgam has the same shape as before the heat treatment by depositing it, but in the case of heat treatment at 280°C or higher, the specimen of the indium amalgam is heat treated at 250°C to 280°C. Unlike indium amalgam specimens, it can be seen that the color has changed to silver. This is because the indium amalgam and the gold coating layer reacted, and the deposition strength of the indium amalgam increases by this reaction.

18 is a diagram showing an example in which indium amalgam deposited by impact is separated.

Referring to FIG. 18, the adhesive strength of the indium amalgam is actually in the case where the reaction between the gold coating layer and the indium amalgam does not occur, such as in the case of heat treatment at 250°C to less than 280°C. It can be seen that the phenomenon of coming off the quartz tube occurs. When the reaction between the indium amalgam and the gold coating layer as shown in FIGS. 16 and 17 occurs, the indium amalgam does not easily separate from the quartz tube even with a strong impact.

As described above, the technical idea of the present invention has been described in detail with reference to preferred embodiments, but the technical idea of the present invention is not limited to the above embodiments, and those skilled in the art within the scope of the technical idea of the present invention Various modifications and changes are possible by the user.

Claims (6)

Preparing indium amalgam by mixing indium and mercury at a temperature of 156° C. or higher;
Depositing a gold coating layer inside the quartz tube by applying gold paste to the inside of the quartz tube and performing heat treatment between 800°C and 1150°C; And
Comprising the step of depositing the indium amalgam by placing the prepared indium amalgam on the gold coating layer and heat treatment,
The step of depositing the indium amalgam,
And reacting the indium amalgam and the gold coating layer to cause a color change by heat treatment at a temperature of 280°C to 300°C. The method of claim 1,
The method of manufacturing an environment-friendly high-power UV lamp, characterized in that the indium and the mercury are mixed in a weight ratio of 89:11. The method of claim 1,
The indium amalgam is cut into a size of 1 to 2 g and placed on the gold coating layer. delete The method of claim 4,
In the step of reacting,
An environment-friendly high-power ultraviolet lamp manufacturing method, characterized in that heat treatment for 30 minutes or more. An environment-friendly high-power ultraviolet lamp manufactured by the method of manufacturing an environment-friendly high-power ultraviolet lamp according to any one of claims 1, 2, 3 and 5.

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