JP2002170520A - Mercury inclusion body, its manufacturing method, and fluorescent lamp using mercury inclusion body thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a mercury inclusion body with which a required minimum amount of mercury is sealed exactly in a glass bulb, a fluorescent substance film is prevented from being scratched during transportation, generation of an abnormal noise is inhibited, and further degradation of an appearance quality is prevented, and also to provide its manufacturing method and a fluorescent lamp using the mercury inclusion body. SOLUTION: After mercury is dipped in a solution of a metal alkoxide, the mercury to which the solution of the metal alkoxide is attached is heat- treated. By this treatment, the surface of the liquid mercury is coated by a continuous film consisting of a metal oxide or a compound metal oxide. As a result, since the required minimum amount of mercury is accurately sealed in the fluorescent lamp, the treatment is friendly to the environment, the fluorescent substance film is prevented from being scratched during transportation, the generation of the abnormal noise is inhibited, and further the degradation of the appearance quality is prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mercury sealed body, a method for producing the mercury sealed body, and a fluorescent lamp using the mercury sealed body.

[0002]

2. Description of the Related Art Conventionally, in a method of manufacturing a fluorescent lamp,
As a method of enclosing mercury in a fluorescent lamp, a stem having a filament and an exhaust pipe is sealed at both ends of a glass bulb having a phosphor film formed on an inner surface, and then the impurity in the glass bulb is removed from the exhaust pipe. A method is known in which liquid mercury is sealed in a glass bulb from an exhaust pipe immediately before the end of the evacuation.

As another method of filling mercury in a fluorescent lamp, a mercury alloy made of mercury and zinc (for example, a mercury alloy consisting of mercury and zinc) is used immediately before the end of evacuation in a glass bulb in order to accurately fill the required minimum amount of mercury. A method of sealing a mercury-filled body) from an exhaust pipe into a glass bulb is known.

In some cases, the enclosed mercury alloy is fixed in the glass bulb so as not to move freely in the glass bulb.

[0005]

However, in the conventional method of manufacturing a fluorescent lamp, particularly in the method of directly enclosing liquid mercury in a glass bulb, a part of liquid mercury adheres to the mercury enclosing device or exhausts gas. There has been a problem that a predetermined amount of mercury cannot be sealed because the gas evaporates due to heat at the time and is exhausted together with the impurity gas.

In order to solve this problem, there is a method in which the amount of mercury to be filled is originally larger than the amount of mercury to be filled and sealed in a glass bulb. This has a problem that it is not practically preferable.

On the other hand, in the case of a method in which a solid mercury alloy is sealed in a glass bulb in place of liquid mercury, if the mercury alloy is not fixed in the fluorescent lamp, the mercury alloy is deposited on the phosphor film during transportation. There has been a problem that a collision causes a streak-like or pinhole-like scratch on the phosphor film, and that the collision causes an abnormal sound. In addition, there is also a problem that during lighting, a black shadow of the mercury alloy appears on the fluorescent lamp, deteriorating the appearance quality.

In addition, even if the mercury alloy is fixed in the fluorescent lamp at the time of manufacture, the mercury alloy comes off relatively easily due to an impact during transportation or the like, and the above-mentioned various problems occur.

The present invention has been made in order to solve such a problem, and it is possible to accurately seal a necessary minimum amount of mercury in a glass bulb, and the phosphor film is damaged during transportation. A mercury enclosure, a method of manufacturing the mercury enclosure, and a method of using the mercury enclosure, which can prevent the occurrence of abnormal noise and can prevent the appearance quality from deteriorating. It is an object of the present invention to provide a fluorescent lamp.

[0010]

The mercury inclusion body of the present invention comprises:
Liquid mercury is characterized in that the surface is coated with a continuous film.

According to this configuration, since the liquid mercury is covered with the continuous film, it is possible to prevent the mercury from adhering to the mercury filling device or the like and from being evaporated and exhausted during the exhausting process as in the related art. Therefore, the required minimum amount of mercury can be accurately sealed in the fluorescent lamp, and since the continuous film has flexibility, the continuous film collides with the fluorescent film of the fluorescent lamp. In addition to suppressing scratches and abnormal noise, the light transmittance is higher due to the thinness of the continuous film, and the shadow of the continuous film appears on the fluorescent lamp during lighting. Can be prevented.

In the above-mentioned mercury inclusion, the continuous film is made of a metal oxide or a composite metal oxide. According to this configuration, it is possible to prevent the substance forming the continuous film from reacting with the activated mercury ions during the lighting of the fluorescent lamp, thereby preventing a decrease in mercury contributing to the discharge.

The thickness of the continuous film is 0.1 mm or more.
It is preferably 0 mm or less.

When the thickness of the continuous film is less than 0.1 mm, the film is broken during handling in the manufacturing process. On the other hand, when the thickness of the continuous film exceeds 1.0 mm, the film is intentionally broken. This is because it is difficult to break.

Preferably, the continuous film is formed by laminating a plurality of thin films. According to this configuration, compared to a case where a thick continuous film is formed at a time,
Since it is not necessary to apply a large amount of the solution for forming a continuous film on the surface of mercury, the amount of heat during the heat treatment can be reduced. As a result, the amount of impurities contained in the continuous film forming solution is taken into the continuous film by rapid heating, and there is no possibility that the impurities adversely affect the lamp characteristics.

The thickness of the thin film forming the continuous film is preferably such that the innermost thin film is formed to be the thinnest. According to this configuration, it is possible to reduce the amount of heat applied to the continuous film forming solution during the first step of forming a thin film (continuous film). As a result, the amount of heat applied to the solid mercury can be reduced, so that the evaporation of mercury can be suppressed, and the accuracy of the amount of mercury enclosed increases.

Further, in the mercury inclusion body, it is preferable that the mercury inclusion body is a sphere. According to this configuration, the mercury enclosure can be easily sealed in the fluorescent lamp.

The mercury enclosure is preferably a mercury enclosure obtained by applying a metal alkoxide solution on the surface of mercury and heat-treating the metal alkoxide solution applied on the surface of mercury. This is because the mercury inclusion body obtained by this method is covered with a continuous film with only a minimum necessary amount of mercury, and is formed into a substantially spherical shape that can be easily sealed in a fluorescent lamp. Further, since the film is a flexible continuous film, the mercury-filled body does not damage the phosphor film, and the appearance quality at the time of sealing is excellent.

Next, the method for producing a mercury inclusion body of the present invention is as follows.
After immersing the mercury in the continuous film forming solution and applying the continuous film forming solution to the surface of the mercury, the continuous film forming solution applied to the mercury surface is subjected to heat treatment. Forming a continuous film on the surface of the mercury.

According to this method, only the necessary minimum amount of mercury can be covered with the continuous film without waste, and the mercury-filled body can be easily sealed in the fluorescent lamp, that is, almost in a shape that can be sealed. It can be formed into a sphere.

In the method for producing a mercury inclusion body, it is preferable to use mercury solidified as the mercury, in particular, mercury solidified from liquid mercury in a rare gas atmosphere.

According to this method, since the mercury is coagulated in advance, the necessary amount of mercury can be coated with the continuous film without waste, and the handling of the mercury is easy when forming the continuous film. Can be Also,
By coagulating in a rare gas atmosphere, it is possible to prevent an impurity gas (oxygen, nitrogen, etc.) that has a bad influence on the characteristics of the fluorescent lamp from being taken into the continuous film during the coagulation of liquid mercury. .

In the method for producing a mercury inclusion body, it is preferable to use a metal alkoxide solution as the continuous film forming solution. According to this method, a continuous film can be formed on the surface of mercury relatively easily, and only the required minimum amount of mercury can be covered with the continuous film. In addition, the mercury enclosure is formed in a shape that can be easily sealed in the fluorescent lamp, that is, in a substantially spherical shape.

In the method for manufacturing a mercury inclusion body, it is preferable that the operation of forming the continuous film is repeated a plurality of times, and the continuous film is formed by laminating a plurality of thin films. According to this method, it is not necessary to apply a large amount of the solution for forming a continuous film on the surface of mercury, compared with the case of forming a continuous film having a large thickness at one time. can do.

In the method for producing a mercury inclusion body, it is preferable to use a mixed gas of city gas and oxygen during the heat treatment. According to this method, since the mixed gas of city gas and oxygen generates little moisture during combustion, it is possible to prevent moisture from being taken into the continuous film, and adversely affect lamp characteristics due to the taken-up of moisture. Can be reduced.

Next, the fluorescent lamp of the present invention comprises a glass bulb and a phosphor film formed on the inner surface of the glass bulb. It is characterized by being enclosed.

According to this configuration, the required minimum amount of mercury can be accurately sealed in the fluorescent lamp, and since the continuous film has flexibility, the continuous film and the fluorescent lamp can be transported during transportation. Can be prevented from being damaged by collision with the phosphor film, the generation of abnormal noise can be suppressed, and the thickness of the continuous film is thin. Hard to appear.

[0028]

Embodiments of the present invention will be described below with reference to the drawings.

A rated power of 20 W according to an embodiment of the present invention.
As shown in FIG.
A glass bulb 1 made of soda glass having a diameter of 0 mm and an outer diameter of 28 mm is provided, and bases 2 attached to both ends of the glass bulb 1 are provided.

Both ends of the glass bulb 1 are sealed by a stem 4 made of lead glass having an exhaust pipe 3 having an inner diameter of 2 mm. Two lead wires 5, one end of which is connected to the power pin 2 a of the base 2, pass through the stem 4. A filament 6 made of tungsten coated with an electron-emitting substance such as barium oxide is provided between the other ends of the lead wires 5.

On the inner surface of the glass bulb 1, a phosphor film 7 made of a three-wavelength rare earth element is formed.

Further, 7 mg of mercury and 260 MPa of argon gas are sealed in the glass bulb 1, respectively.

Next, a method of manufacturing such a straight tube fluorescent lamp will be described.

First, a phosphor coating solution is applied to the inner surface of the glass bulb 1 that has been washed and dried, and dried, and then subjected to a heat treatment to form a phosphor film 7.

Thereafter, the stem 4 to which the exhaust pipe 3, the lead wire 5, and the filament 6 are attached in advance is sealed to both ends of the glass bulb 1.

Next, the impure gas in the glass bulb 1 is evacuated from the exhaust pipe 3, and immediately before the end of the exhaust, the mercury enclosure in which the surface of the liquid mercury 9 is covered with the continuous film 10 from the exhaust pipe 3 as described later. 8 and an argon gas (sealing gas) are further sealed in the glass bulb 1 to seal off the exhaust pipe 3. Thereafter, the bases 2 are attached to both ends of the glass bulb 1 to manufacture a fluorescent lamp.

In the manufacturing process of the fluorescent lamp, after the mercury enclosure 8 is sealed from the exhaust pipe 3 into the glass bulb 1, the mercury enclosure 8 is connected to the glass bulb 1 (more precisely, the phosphor film 7). When touching the inner surface of the
Is vaporized (300 Pa or more) by heat at the time of exhaust in the glass bulb 1 (generally, the glass bulb 1 is heated to several hundred degrees in order to efficiently exhaust during exhaust).
Then, a part of the continuous film 10 is broken by the pressure, and the vaporized mercury is released into the glass bulb 1.

As the mercury enclosure 8 after mercury release, all mercury is released into the glass bulb 1.
Only the continuous film 10 remains.

Next, the mercury enclosure used in the above-described method for manufacturing a fluorescent lamp will be described.

As shown in FIG. 1, the mercury enclosure 8 is a sphere having a diameter of about 1 mm, and the surface of liquid mercury 9 (7 mg) is made of a metal oxide such as aluminum oxide and has a thickness of 0.3 mm. Coated with membrane 10. The sphere means a substantially sphere.

The size of the mercury inclusion is 0.5 to 2.0 m
m, particularly preferably 0.5 to 1.0 mm. As a result, the sealed mercury can be easily sealed without adhering to the inner walls of the mercury-sealed body sealing device and the exhaust pipe, and the sealed mercury does not remain without being vaporized in the glass bulb.

By using the spherical mercury enclosure 8 as described above, when the mercury enclosure 8 is encapsulated from the exhaust pipe 3 into the glass bulb 1 as described above, a mercury enclosure enclosure (not shown), It can be easily sealed without being caught by the exhaust pipe 3 or the like.

In the present invention, the “continuous film 10” includes both a single-layer film and a multilayer film.

By using a metal oxide or a metal composite oxide as the continuous film 10, the substance forming the continuous film 10 reacts with activated mercury ions during lighting,
It is possible to prevent reduction of mercury that contributes to electric discharge.

The thickness of the continuous film 10 is preferably 0.05 mm or more, particularly preferably 0.1 mm or more, in order to prevent the film from being broken during handling in the manufacturing process. On the other hand, if the thickness of the continuous film 10 is too large, it will be difficult to break when the film is intentionally broken as described later.

The thickness of the continuous film 10 means the thickness of the continuous film 10.
Is formed by laminating a plurality of films,
It is assumed that the thicknesses of the laminated films are combined.

Next, a method for manufacturing such a mercury enclosure 8 will be described.

First, in a rare gas atmosphere such as an argon gas, liquid mercury 9 is dropped into a container filled with liquid nitrogen to solidify the liquid mercury 9. When solidifying the liquid mercury 9 as described above, the liquid mercury 9 is solidified in a rare gas atmosphere.
This is to prevent impurities (such as moisture) that adversely affect the characteristics of the fluorescent lamp from adhering to the surface of the liquid mercury 9 during the coagulation.

Thereafter, solidified solid mercury (not shown)
Is immersed in a continuous film-forming solution composed of a metal alkoxide solution kept at -40 ° C, and the surface of solid mercury is gel-coated (adhered) with the continuous film-forming solution. At this time, since solidified mercury is used, the handling is easy. As a solution for forming a continuous film, a solution containing ethyl alcohol as a main component and 3% by weight of aluminum isopropoxide dissolved therein was used.

The metal alkoxide used for producing the mercury inclusion body of the present invention means a metal alkoxide in which an alkyl group is bonded to a metal atom via an oxygen atom. Examples of the alkyl group include methyl, ethyl, n-propyl, isopropyl,
Lower alkyl groups such as n-butyl, isobutyl, sec-butyl, n-pentyl, isopentyl, sec-pentyl and the like can be mentioned. As metal, aluminum,
Examples include silicon, titanium, cerium, antimony, and yttrium. Specifically, aluminum isopropoxide, aluminum sec-butoxide, silicon methoxide, silicon ethoxide, titanium isopropoxide, titanium butoxide, cerium ethoxide,
Yttrium trimethoxide and the like can be mentioned, but not limited thereto. In particular, aluminum isopropoxide, silicon ethoxide, titanium isopropoxide, titanium butoxide, cerium ethoxide,
Yttrium trimethoxide is preferred.

The metal alkoxide is preferably prepared by dissolving a liquid or powder in a solvent in advance to form a metal alkoxide solution. As a solvent for dissolving the metal alkoxide, any solvent may be used as long as it does not inhibit the hydrolysis or polymerization reaction of the metal alkoxide. Examples thereof include ordinary alcohols such as methanol, ethanol, n-propyl alcohol and isopropyl alcohol; alkoxy alcohols such as 2-methoxyethanol and 2-ethoxyethanol; 1,4-dioxane, dimethylformamide, dimethylacetamide, toluene and xylene. be able to. In particular, methanol, ethanol, n-
Ordinary alcohols such as propyl alcohol and isopropyl alcohol are preferred. The amount of the metal alkoxide in the solvent is 90% by mass or less, preferably 1 to 80% by mass, based on the solvent.

In the hydrolysis and polycondensation reaction of the metal alkoxide solution, usually only water in the air or water originally contained in the solvent is sufficient, but a small amount of a catalyst such as water is added. To promote hydrolysis.

The temperature of the metal alkoxide solution must be individually selected in consideration of the reactivity of the metal alkoxide, and cannot be specified uniformly. Generally, 3
It is kept below 0 ° C. When solidified solid mercury is used, the solid mercury is preferably maintained at 0 ° C or lower, and particularly preferably at -50 ° C to 0 ° C, in order to prevent liquefaction of the solid mercury.

Next, solid mercury whose surface is gel-coated is heated to 500 ° C. or more, preferably 600 to 1000 ° C.
To form a continuous film 10 on the surface of solid mercury partially liquefied by the heat of the flame. It is preferable to use a flame that is produced by burning a gas obtained by mixing a city gas (natural gas system) that generates little moisture during combustion with oxygen. By using a flame that generates little moisture during combustion, the continuous film 10
It is possible to prevent moisture from being taken into the inside, and it is possible to reduce the adverse effect on the lamp characteristics due to the taking of moisture.

In particular, in the step of forming the continuous film 10, the step of forming the continuous film 10 is repeated a plurality of times to form the continuous film 10 into a plurality of thin films (thickness: 50 μm to 100 μm).
m) is preferably formed by laminating. This is because, in order to form a continuous film 10 having a large thickness at a time, a large amount of a solution for forming a continuous film must be applied to the surface of solid mercury.
This is because the amount of heat required to form the heat must be considerably increased. As a result, the applied continuous film forming solution is rapidly heated, and the impurities contained in the continuous film forming solution are taken into the continuous film 10 without being scattered outside, and the impurities are removed from the lamp. May be adversely affected.

Further, when the step of forming the continuous film 10 is repeated a plurality of times, and the continuous film 10 is formed by laminating a plurality of thin films, it is preferable that the thickness of the innermost thin film is minimized. This reduces the amount of heat applied to the continuous film forming solution during the first step of forming a thin film (continuous film), that is, during the heat treatment of the continuous film forming solution that is in direct contact with solid mercury. As a result, the amount of heat applied to solid mercury can be reduced, so that evaporation of mercury can be suppressed, and the accuracy of the amount of mercury enclosed can be increased.

After the second time, since a thin film is already formed on the surface of solid mercury, evaporation of mercury can be suppressed even if the amount of heat applied to solid mercury is large.

The thickness of the continuous film 10 (thin film) can be adjusted by the viscosity and concentration of the solution for forming a continuous film, the immersion time, the number of immersions, the drying method, and the like.

Thus, the mercury inclusion body 8 is manufactured.
After the production, the mercury in the mercury enclosure 8 is liquid.

Incidentally, also in the fluorescent lamp manufactured by the method for manufacturing a fluorescent lamp according to the embodiment of the present invention (hereinafter, referred to as the present invention), the continuous film 10 (shown in FIG. Zu) exists. Then, in order to examine the influence of the continuous film 10 on the fluorescent lamp, the present invention was examined for the damage state of the phosphor film 7 by a vibration test, the occurrence of abnormal noise, and the appearance quality. The result was obtained.

The vibration test was performed at 1 G for 10 minutes at a frequency of 10 to 55 Hz with a sweep of １ ／ octave for 60 minutes. This vibration condition corresponds to a case where the fluorescent lamp is put in cardboard for lamp packing and transported by a car by about 1000 km.

In particular, regarding the damage state of the phosphor film 7 by the vibration test, for comparison, a mercury alloy composed of mercury and zinc (weight ratio: 50: 5) was used instead of the mercury inclusion body 8.
0) A 20 W rated tube straight fluorescent lamp (hereinafter referred to as a fluorescent lamp) manufactured using the same method as the fluorescent lamp manufacturing method according to the embodiment of the present invention except that 14 mg is sealed in the glass bulb 1. , Conventional products) were also examined under the same conditions as the products of the present invention.

The number of the samples of the present invention and the conventional product is 25.

As a result, none of the products of the present invention had any stripe-like or pinhole-like scratches on the phosphor film 7.
On the other hand, in the conventional product, the phosphor film 7 has a thickness of 0.05 mm to 0.30 mm.
Approximately 30 pinhole-shaped scratches of about mm were generated. Thus, it was found that the continuous film 10 itself has a very low aggressiveness to the phosphor film 7. This is a continuous film 1
This is considered to be because 0 has flexibility.

The product of the present invention did not generate any abnormal noise even when the lamp was tilted or shaken. This is also considered to be because the continuous film 10 has flexibility.

Further, in the product of the present invention, the shadow considered to be the continuous film 10 was not seen on the fluorescent lamp when the product was turned on. Thus, the product of the present invention had no problem in appearance. This is considered to be because the thickness of the continuous film 10 is small and the light transmittance of the continuous film 10 is higher.

As described above, according to the method for manufacturing a fluorescent lamp according to the embodiment of the present invention, the required minimum amount of mercury can be accurately sealed in the fluorescent lamp, so that it is environmentally friendly and In addition, it is possible to prevent the phosphor film 7 from being damaged, to suppress the generation of abnormal noise, and to prevent the appearance quality from deteriorating.

In the above embodiment, the rated power 20
Although the description has been given of the case where a W-shaped straight fluorescent lamp is manufactured, the present invention is, for example, a straight-tube-shaped fluorescent lamp having a rated power of 32 W or 40 W, a round-tube-shaped, a U-shaped, a W-shaped fluorescent lamp, and the like. Can also be applied to a fluorescent lamp using a plurality of cells provided on one or a plurality of glass plates.

In the above embodiment, the case where the continuous film 10 made of a metal oxide is used has been described. However, the same effect as described above can be obtained even when a continuous film made of a metal foil such as aluminum is used. It is thought that it is possible.

Further, in the above embodiment, the case where the phosphor film 7 is formed directly on the inner surface of the glass bulb 1 has been described, but fine particles or a continuous protective film or the like may be interposed between the glass bulb 1 and the phosphor film 7. Even when a transparent conductive film or the like is formed, the same effect as described above can be obtained.

Further, in the above embodiment, the case where a solution in which aluminum isopropoxide containing ethyl alcohol as a main component is dissolved is used as the continuous film forming solution has been described. Even with ethoxyoxysilane (TEOS), the same effect as described above can be obtained.

Further, in the above embodiment, the case where the liquid mercury 9 is coagulated and then the solidified solid mercury is immersed in the continuous film forming solution has been described. The same effect as above can be obtained even when immersed in a solution for use.

In the above embodiment, the case where the phosphor film 7 made of a three-wavelength rare earth element is used has been described. However, for example, even when a halophosphoric acid-based phosphor film is used, the same effect as described above can be obtained. Obtainable.

Further, in the above embodiment, the case where liquid mercury 9 is coagulated by using liquid nitrogen has been described. However, liquid mercury 9 is coagulated by using liquefied argon, krypton, xenon, or the like. In this case, the same effect as above can be obtained.

[0075]

As described above, according to the present invention, the minimum amount of mercury can be accurately sealed in a fluorescent lamp, so that it is environmentally friendly and prevents the phosphor film from being damaged during transportation. A mercury enclosure, a method of manufacturing the mercury enclosure, and a fluorescent light using the mercury enclosure, which can prevent the occurrence of abnormal noise while preventing the appearance quality from deteriorating. A lamp can be provided.

[Brief description of the drawings]

FIG. 1 is a front sectional view of a mercury inclusion used in a method for manufacturing a fluorescent lamp according to an embodiment of the present invention.

FIG. 2 is a partially cutaway front view of a straight tube-type fluorescent lamp similarly manufactured by the method for manufacturing a fluorescent lamp.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Glass bulb 2 Base 2a Power pin 3 Exhaust pipe 4 Stem 5 Lead wire 6 Filament 7 Phosphor film 8 Mercury enclosure 9 Liquid mercury 10 Continuous film

Claims (13)

[Claims] 1. A mercury inclusion, wherein the surface of liquid mercury is covered with a continuous film. 2. The mercury inclusion according to claim 1, wherein the continuous film is made of a metal oxide or a composite metal oxide. 3. The continuous film according to claim 1, wherein the thickness of the continuous film is 0.1 mm or more and 1.0 mm or less.
Mercury inclusions as described. 4. The mercury inclusion according to claim 1, wherein the continuous film is formed by laminating a plurality of thin films. 5. The mercury inclusion according to claim 4, wherein the thin film forming the continuous film has the thinnest innermost thin film. 6. The mercury inclusion according to claim 1, wherein the mercury inclusion is a sphere. 7. The mercury according to claim 1, wherein a metal alkoxide solution is applied to the surface of mercury, and the metal alkoxide solution applied to the surface of the mercury is heat-treated. Inclusion body. 8. After immersing mercury in the continuous film-forming solution and applying the continuous film-forming solution to the surface of the mercury,
A method for producing a mercury inclusion body, wherein the continuous film forming solution adhered to the surface of the mercury is subjected to a heat treatment to form a continuous film on the surface of the mercury. 9. The method according to claim 8, wherein the mercury is obtained by solidifying liquid mercury in a rare gas atmosphere. 10. The method according to claim 8, wherein the continuous film forming solution is a metal alkoxide solution. 11. The mercury enclosure according to claim 8, wherein the operation of forming the continuous film is repeated a plurality of times, and the continuous film is formed by stacking a plurality of thin films. Manufacturing method. 12. The method according to claim 8, wherein a combustion flame of a mixed gas of city gas and oxygen is used in the heat treatment. 13. A gas-filled gas and a mercury-filled body according to any one of claims 1 to 7, wherein said gas-filled gas is filled in said glass bulb of a fluorescent lamp having a glass bulb and a phosphor film formed on the inner surface of said glass bulb. A fluorescent lamp characterized by being sealed.