JP2000063156A - Sealing structure for peripheral part of glass panel and sealing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To seal peripheral parts of a glass panel at a low heating temperature by forming ground metal layers bonded to each of opposite glass surfaces in the respective peripheral parts and a low-melting metal brazing material layer airtightly joining a space between both the ground metal layers with a metal between either one of mutually opposite glass plates and the other glass plate. SOLUTION: Ground metal layers 4 bonded to opposite glass surfaces of respective peripheral parts 2, coating metal layers bonded onto the ground metal layers 4 with a metal and a low-melting brazing material layer 6 airtightly joined to a space between both the coating metal layers are formed between either one 1A of mutually opposite glass plates and the other glass plate 1B. The ground metal layers 4 are preferably formed of a metal material providing a lower oxidation-reduction potential of the metal material constituting the coating metal layers and the low-melting brazing material layer 6. The coating metal layers are formed of a metal having a higher oxidation-reduction potential than that possessed by the metals constituting the ground metal layers 4 and the low-melting metal brazing layer 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a peripheral sealing structure for a glass panel in which a space is formed between a plurality of glass plates, and more specifically, a glass panel in which the space is hermetically isolated from the surrounding atmosphere. The present invention relates to a peripheral edge sealing structure.

[0002]

2. Description of the Related Art In the above-described glass panel peripheral edge sealing structure, conventionally, a low melting point glass having a softening point lower than that of a glass plate forming the glass panel is used to form a sealing portion on the peripheral edge of the opposing glass plate. The formed sealing structure was used.
That is, for example, as shown in FIG. 6, a plurality of glass plates 1
In a glass panel in which a void 3 is formed between the glass plate 1 and the glass plate 1, a low melting point having a softening temperature lower than that of the glass plate 1 is used to seal the peripheral portion 2 of the glass panel that hermetically isolates the void 3 from the surrounding atmosphere. The sealing portion 9 of the peripheral portion 2 is formed using glass. In the case where this glass panel is a glass panel in which a vacuum layer is formed between a plurality of glass plates 1, after the gap 3 is cut off from the outside air, the glass plate 1 is preliminarily provided with a suction port 10 provided in one glass plate 1A. In order to suck the air in the gap 3 and maintain a vacuum between the glass plates 1A and 1B, the suction port 10 is sealed with a low melting glass. Although the peripheral edge sealing structure using this low melting point glass has the spacing member 7 disposed in the void 3, the sealing portion 9 also has a space between the glass plates 1A and 1B sandwiching the void 3. It also plays a role in maintaining the interval.

[0003]

However, in the above conventional sealing structure, the glass plate 1 is used for sealing.
It is necessary that the low-melting-point glass that seals the peripheral edge portion 2 of the above is sufficiently softened and fused to the glass plates 1A and 1B on both sides,
For this reason, the low melting point glass is
Use a softening point lower than 1B. In general, the lower the melting point of the glass, the lower the softening point is, the more the durability against acid and alkali and the water resistance are lower.
When the softening point of 1B is low, the use of a low melting point glass having a lower softening point lowers the durability and water resistance of the glass panel.

Therefore, the present invention is to solve the above problems and to provide a glass panel peripheral edge sealing structure which can be installed at a lower heating temperature and a sealing method therefor.

[0005]

[Characteristic Configuration of the Present Invention] The characteristic configuration of the peripheral edge sealing structure of a glass panel of the present invention according to claim 1 will be described with reference to an example shown in FIG. Between the one glass plate 1A and the other glass plate 1B, the opposite glass surfaces 2a of the respective peripheral edge portions 2 are provided.
The point is that the underlying metal layers 4 bonded to each other and the low melting point metal brazing material layer 6 in which the two underlying metal layers 4 are hermetically metal-bonded to each other are formed (first characteristic configuration).

The characteristic structure of the glass peripheral edge sealing structure multi-layer according to the second aspect of the present invention will be described with reference to the example shown in FIG. 1. When the underlying metal layer 4 in the first characteristic structure is nickel, This is characterized in that silver or chrome is laminated and formed on the facing surface (second characteristic constitution).

The characteristic structure of the peripheral edge sealing structure for a glass panel of the present invention according to claim 3 will be described with reference to the example shown in FIG.
The point is that nickel or silver is formed by chemical plating on the opposite surface (third characteristic configuration).

The characteristic constitution of the peripheral edge sealing structure of the glass panel of the present invention according to claim 4 will be described with reference to the example shown in FIG. The point is that the chromium vapor deposition layer 4B is formed by the vapor deposition method (for example, the sputtering method) (fourth characteristic configuration).

The characteristic structure of the peripheral edge sealing structure for a glass panel according to the fifth aspect of the present invention will be described with reference to the example shown in FIG. 3. The one glass plate 1A and the other glass plate 1B are opposed to each other. Between the base metal layers 4 bonded to the opposing glass surfaces 2a of the respective peripheral edge portions 2, the coated metal layers 5 metal-bonded to the both base metal layers 4, and the two coated metal layers 5 between The low-melting-point metal brazing material layer 6 that is airtightly metal-bonded is formed (fifth characteristic configuration).

The characteristic construction of the peripheral edge sealing structure for a glass panel according to the sixth aspect of the present invention will be described with reference to the example shown in FIG. 3, in which the underlying metal layer 4 in the fifth characteristic construction is
The point is that the metal material is selected and formed so as to have the lowest potential with respect to the redox potential of the metal material forming the other layers 5 and 6 (sixth characteristic configuration).

The characteristic construction of the peripheral edge sealing structure for a glass panel of the present invention according to claim 7 will be described with reference to the example shown in FIG. 3, in which the underlying metal layer 4 in the sixth characteristic construction is
It is formed of a metal selected from nickel, chromium, silver, and copper (seventh characteristic configuration).

The characteristic constitution of the peripheral edge sealing structure for a glass panel of the present invention according to claim 8 will be described with reference to the example shown in FIG. 3. The covering metal layer 5 in the sixth characteristic constitution or the seventh characteristic constitution described above. Is formed of a metal selected from gold, silver, platinum, copper, and tin (eighth characteristic configuration).

According to the ninth aspect of the present invention, there is provided a glass panel peripheral edge sealing structure, wherein the metal material forming the low melting point metal brazing material layer 6 is the metal material forming the low melting point metal brazing material layer 6 of any one of the first to eighth aspects. , Bismuth, lead, tin, zinc, indium, and antimony as a main component, or at least two of them (the ninth characteristic configuration).

According to a tenth aspect of the glass panel peripheral edge sealing structure of the present invention, at least one of silver and aluminum is contained as an auxiliary component in the metal material in the ninth characteristic configuration. The tenth characteristic composition) point.

According to the eleventh aspect of the invention, there is provided a glass panel peripheral edge sealing structure according to any one of the first to tenth aspects, wherein the voids have a particle size of 0.1 μm or more and less than 10 μm. Particles are dispersed and interposed (first
1 characteristic configuration).

The characteristic construction of the glass panel peripheral edge sealing method of the present invention according to claim 12 will be described with reference to the example shown in FIG. 1. The underlying metal layer 4 is provided in each of the predetermined regions of both glass plate peripheral edges 2. Both of the plate glasses 1A and 1B are stacked in a state where they are laminated and the underlying metal layer 4 is opposed to each other, and the low melting point metal brazing material is melted between the underlying metal layers and then solidified (Twelfth feature) Composition) point.

The characteristic construction of the glass panel peripheral edge sealing method according to the thirteenth aspect of the present invention will be described with reference to the example shown in FIG.
In forming the laminate, a metal selected from nickel, copper, and silver is plated (thirteenth characteristic configuration).

The characteristic construction of the glass panel peripheral edge sealing method according to the fourteenth aspect of the present invention will be described with reference to the example shown in FIG.
In the case of stacking, the metal chromium is formed by physical vapor deposition (fourteenth characteristic configuration).

The characteristic construction of the glass panel peripheral edge sealing structure according to the fifteenth aspect of the present invention will be described with reference to the example shown in FIG. Forming a laminated layer, and forming a coating metal layer 5 of a metal material suitable for brazing on each surface of the two underlying metal layers 4;
The two plate glasses 1 are overlapped with the both coating metal layers 5 facing each other, the low melting point metal brazing material is melted between the both coating metal layers 5, and then solidified (a fifteenth characteristic configuration). is there.

The characteristic construction of the peripheral edge sealing structure for a glass panel of the present invention according to claim 16 will be described with reference to the example shown in FIG.
In forming the metal, a metal material having a lower redox potential than both the metal material forming the coating metal layer 5 and the low melting point metal brazing material is used (sixteenth characteristic configuration).

The characteristic construction of the peripheral edge sealing structure for a glass panel according to the seventeenth aspect of the present invention will be described with reference to the example shown in FIG.
In laminating, at least one metal selected from nickel, copper, and silver is plated (seventeenth characteristic configuration).

The characteristic construction of the glass panel peripheral edge sealing structure of the eighteenth aspect of the present invention will be described with reference to the example shown in FIG.
Is formed by the chromium vapor deposition layer 4B in which metal chromium is physically vapor deposited (the eighteenth characteristic structure).

The characteristic construction of the peripheral edge sealing structure for a glass panel according to the nineteenth aspect of the present invention will be described with reference to the example shown in FIG. 3 or FIG. In forming the coating metal layer, at least one metal material selected from gold, silver, platinum, and copper is plated (seventeenth characteristic configuration).

[Operations and Effects of Each Characteristic Configuration] According to the characteristic configuration of the peripheral edge sealing structure of the glass panel according to the invention described in claim 1, the heating temperature at the time of sealing the peripheral edge is relatively low. Can be temperature. Therefore, the peripheral portion of the glass panel can be sealed at a lower temperature than the case where the sealing is performed using the low melting point glass.

The characteristic constitution of the peripheral edge sealing structure of the glass panel according to the invention as defined in claim 2 is a constitution showing a specific example of the first characteristic constitution, and in addition to the function and effect of the first characteristic constitution. As a characteristic effect, the adhesion between the underlying metal layer and the glass surface can be further improved. That is, to explain along the example shown in FIG. 1, since nickel, silver or chromium forming the underlying metal layer 4 has a low redox potential, it bonds with oxygen atoms of the oxide in the glass. For example, the underlying metal layer 4 having good adhesion to the glass surface can be formed by forming a film by physical attachment such as vapor deposition.

The characteristic constitution of the peripheral edge sealing structure of the glass panel according to the invention as defined in claim 3 is a constitution showing a specific example of the second characteristic constitution, and in addition to the operational effect of the second characteristic constitution. As a characteristic effect, the adhesion between the underlying metal layer and the glass surface can be improved. That is, to explain with reference to the example shown in FIG.
By using nickel or silver for electroless chemical plating, the glass surface can be easily plated. In particular,
Since nickel has a low redox potential, the bond with the oxygen atom of the oxide in the glass becomes strong, so that the underlying metal layer 4 having good adhesion to the glass surface can be formed. Furthermore, since nickel, silver, etc. are easily compatible with solder, soldering is easy, and sealing of the peripheral portion at low temperature is easy.

The characteristic constitution of the peripheral edge sealing structure for a glass panel according to the invention described in claim 4 is a more specific constitution of the second characteristic constitution, and in addition to the operational effect of the second characteristic constitution. As a characteristic effect, the adhesion between the underlying metal layer and the glass surface can be surely increased. That is, to explain according to the example shown in FIG. 4, if the underlying metal layer 4 is formed by a physical vapor deposition method in which it is deposited under vacuum,
The deposited chromium has almost no chance of coming into contact with oxygen until it reaches the glass surface 2a, so that it is easy to bond with oxygen in the glass, and it becomes possible to adhere and laminate to a strong glass surface. Moreover, since the extremely fine particles are vapor-deposited on the glass surface 2a, the extremely thin base metal layer 4 can be formed.

According to the characteristic construction of the peripheral edge sealing structure of the glass panel according to the invention described in claim 5, the glass panel is formed by sealing the peripheral edge while suppressing the influence of heating. . That is, to explain according to the example shown in FIG. 3, even if the underlying metal layer 4 bonded to the glass surface 2a is suitable for adhesion and lamination on the glass surface 2a, since it has a high bonding property with oxygen, An oxide film is likely to be formed, and a flux for removing the oxide film is required at the time of brazing, but brazing is facilitated by providing the coating metal layer 5 which is metal-bonded to the base metal layer 4. For example, if the coating metal layer 5 is formed of a metal having a redox potential higher than that of the metal forming the coating metal layer 5, the formation of an oxide film is suppressed, or the formed oxide film is easily broken to melt. The metal wax becomes easy to fit in.

The characteristic constitution of the peripheral edge sealing structure for a glass panel according to the sixth aspect of the present invention is a preferable example of the fifth characteristic constitution, and in addition to the operational effects of the fifth characteristic constitution. As a characteristic effect, the underlying metal layer is stably and closely formed on the glass surface.
That is, to explain according to the example shown in FIG.
If the underlayer metal layer 4 is formed of a metal material having the lowest redox potential among the metal materials forming the layers 5 and 6, the underlayer metal layer 4 is in a condition in which it is most easily bonded to glass. It is possible to form the underlying metal layer 4 that is in close contact with the 2a.

The characteristic construction of the peripheral edge sealing structure for a glass panel according to the invention described in claim 7 is also a construction showing a specific example of the fifth characteristic construction, and in addition to the action and effect of the fifth characteristic construction. As a characteristic effect, the underlying metal layer is stably and closely formed on the glass surface. That is, referring to the example shown in FIG. 3, nickel and chromium are both metals having a low redox potential, and silver and copper are both metals that are easy to chemically plate on the glass surface. Therefore, whichever metal is used, the glass surface 2a and the underlying metal layer 4 can be stably adhered.

The characteristic construction of the peripheral edge sealing structure for a glass panel according to the invention described in claim 8 is a construction showing specific examples of the fifth characteristic construction to the seventh characteristic construction, and the sixth characteristic construction. In any one of the seventh to seventh characteristic configurations, while exhibiting the action and effect, the adhesiveness between the low melting point metal brazing material layer and the coating metal layer is further enhanced as the characteristic action and effect. That is, to explain according to the example shown in FIG. 3, gold, silver, platinum, and copper are all metals having a high redox potential, and an oxide film is difficult to be formed on the surface of the formed coating metal layer 5. When the metal brazing for forming the low melting point metal brazing material layer 6 is performed, there is no possibility that an oxide film will be present at the boundary surface between the coating metal layer 5 and the low melting point metal brazing material layer 6, so that the soundness is sound. Brazing becomes possible. Therefore, it becomes possible to secure the adhesion between the base metal layer 4 and the coating metal layer 5 and between the coating metal layers 5 on both sides via the low melting point metal brazing material layer 6.

According to the characteristic construction of the peripheral edge sealing structure of the glass panel according to the invention described in claim 9, for example, by using lead-tin alloy, zinc-tin alloy, zinc, tin, etc. Thus, the peripheral portions of both glass plates can be sealed.

According to the characteristic construction of the peripheral edge sealing structure of the glass panel according to the tenth aspect of the present invention, the low melting point brazing material is made to contain silver or aluminum or both of them. The toughness and strength can be improved, and the toughness and strength of the sealed portion where the metal layers are metal-bonded can be enhanced.

According to the characteristic construction of the peripheral edge sealing structure for a glass panel according to the invention as defined in claim 11, the powder particles are used as the spacing material, whereby the spacing between the glass plates sandwiching the voids is narrowed, In addition, it is possible to reduce the difference in the intervals and make the interference fringes less visible. Further, the texture of the ground glass can be produced by increasing the positional density of the granular material.

According to the characteristic construction of the method for sealing the peripheral portion of the glass panel according to the twelfth aspect of the invention, the peripheral portion of the glass panel is sealed only by melting the low melting point metal brazing material and then solidifying it. become able to. For example, brazing in a furnace becomes easy. That is, to explain according to the example shown in FIG. 1, both glass plates 1 are overlapped with each other, and a low melting point metal brazing material (for example, solder) is placed between the underlying metal layers 4 formed on the peripheral edge portion 2.
The low-melting-point metal brazing material is melted in the superposed state, and then the peripheral portion 2 can be easily sealed by solidifying. Therefore, brazing in the furnace is also possible. For example, if the glass plates 1 stacked as described above are heated in a vacuum furnace, the gap between the glass plates 1 can be maintained in vacuum.

According to the thirteenth aspect of the present invention, the glass panel peripheral edge sealing method is characterized in that it is a specific example of the twelfth characteristic configuration, and has the operational effects of the twelfth characteristic configuration. However, as a further characteristic effect thereof, the formation of the base metal layer is facilitated. That is, FIG.
To explain along the example shown in, for example, nickel,
Chemically depositing the metal on the glass surface 2a of the glass plate peripheral portion 2 by bringing a predetermined region of the glass plate peripheral portion 2 into contact with an electrolytic solution of a metal selected from copper and silver. Therefore, it becomes possible to form the underlying metal layer 4 that is in close contact with the glass surface 2a.

The characteristic construction of the peripheral edge sealing method for a glass panel according to the invention of claim 14 is also a construction showing a specific example of the twelfth characteristic construction, and has the operational effect of the twelfth characteristic construction. However, as a further characteristic effect thereof, it becomes easy to form the underlying metal layer in close contact with the glass plate. That is, to explain according to the example shown in FIG. 1, chromium is vapor-deposited on the glass surface 2a of the glass plate peripheral portion 2 by bringing a predetermined area of the glass plate peripheral portion 2 into contact with vapor of metallic chromium. can do. In a vacuum, the partial pressure of oxygen in the atmosphere is low, the activity of the deposited chromium is high, and the deposited chromium easily bonds with oxygen in the glass. Therefore, the chromium deposition layer 4B adhered to the glass surface 2a.
That is, the base metal layer 4 can be formed extremely thin.

According to the characteristic construction of the peripheral edge sealing method for a glass panel according to the fifteenth aspect of the invention, the peripheral edge of the glass panel can be sealed only by melting the low melting point metal brazing material and then solidifying it. Like For example, brazing in a furnace becomes easy. That is, according to the example shown in FIG. 3, if a metal that is easily adhered to the glass surface 2a is selected as the metal forming the base metal layer 4, the base metal adhered to the glass surface 2a is selected. The layer 4 can be easily formed, and by forming a coating metal layer 5 of a metal material suitable for brazing, that is, having a high wettability to a low melting point metal brazing material on the metal surface of the underlying metal layer 4, the coating metal is formed. Good brazing can be achieved simply by interposing a brazing material between the layers 5 and heating.

According to the sixteenth aspect of the present invention, the glass panel peripheral edge sealing method is characterized in that it is a preferable example of the fifteenth characteristic configuration, and has the operational effects of the fifteenth characteristic configuration. However, as a further characteristic effect thereof, brazing is facilitated. That is, according to the example shown in FIG. 3, since the metal forming the underlying metal layer 4 has a lower redox potential than the metal material of the other layers,
It is easily bonded to oxygen in the glass composition, and is firmly and closely formed on the glass surface 2a.

The characteristic construction of the peripheral edge sealing method for a glass panel according to the seventeenth aspect of the present invention is a construction showing a more specific example of the sixteenth characteristic construction.
In addition to the function and effect of the sixth characteristic configuration, as a further characteristic function and effect, it is possible to easily form the underlying metal layer having higher adhesion to the glass surface. That is, to explain along the example shown in FIG. 3, for example, by contacting a predetermined region of the glass plate peripheral portion 2 with an electrolytic solution of at least one metal selected from nickel, copper, and silver. The metal can be chemically deposited on the glass surface 2a of the glass plate peripheral portion 2 in a good adhesion state.

The characteristic construction of the peripheral edge sealing method for a glass panel according to the eighteenth aspect of the invention is also a concrete example of the fifteenth characteristic construction, and in addition to the operational effects of the fifteenth characteristic construction. Further, as a characteristic effect thereof, it is easy to form the underlying metal layer that is in close contact with the glass plate. That is, referring to the example shown in FIG. 4, the chromium is physically deposited on the glass surface 2a of the glass plate peripheral portion 2 by bringing a predetermined region of the glass plate peripheral portion 2 into contact with the vapor of metallic chromium. The chromium vapor deposition layer 4B can be formed by vapor deposition. In a vacuum, the partial pressure of oxygen in the atmosphere is low, the activity of vapor-deposited chromium is high, and the vapor-deposited chromium is likely to bond with oxygen in the glass. Therefore, the underlying metal layer 4 adhered to the glass surface 2a is As chromium deposition layer 4
It becomes possible to form B. Moreover, since the chromium to be vapor-deposited is vapor-deposited on the glass surface 2a in the state of extremely fine particles, it is possible to form the base metal layer 4 composed of the chromium vapor-deposited layer 4B to be extremely thin.

The characteristic constitution of the method for sealing a peripheral portion of a glass panel according to the invention described in claim 19 is a constitution showing specific examples of the fifteenth characteristic constitution to the eighteenth characteristic constitution,
In any of the fifteenth characteristic configuration to the eighteenth characteristic configuration described above, while exhibiting the respective operational effects, as a further characteristic operational effect, the adhesion between the low melting point metal brazing material layer and the coating metal layer is further improved. Make it excellent. That is, to explain according to the example shown in FIG. 3 or FIG. 4, all of gold, silver, platinum, and copper are metals having a high redox potential, and an oxide film is hard to be formed on the surface. When metal brazing is performed between the portions 5, there is no possibility that an oxide film will intervene on the boundary surface between the coating metal layer 5 and the metal brazing material layer 6, so that sound brazing can be performed. Therefore, it becomes possible to secure the adhesion between the base metal layer 4 and the coating metal layer 5 and between the coating metal layers 5 on both sides via the low melting point metal brazing material layer 6.

As a result, the peripheral portion of the glass panel can be sealed at a relatively low temperature. Moreover, it becomes possible to form a very small gap between the glass plates that sandwich the gap.

In the above description of the means for solving the problems of the present invention, reference numerals are given to refer to the drawings and for convenience of comparison with the drawings. Therefore, the present invention is not limited to the configurations of the reference drawings and other accompanying drawings.

[0045]

BEST MODE FOR CARRYING OUT THE INVENTION The peripheral edge sealing structure of a glass panel according to the present invention will be described below. FIG. 3 is a longitudinal sectional view of an essential part of an example of the glass panel according to the present invention.

FIG. 1 shows an example of a glass panel in which a gap is formed between two glass plates as an example of the peripheral edge sealing structure of the glass panel according to the present invention. The glass panel has a peripheral edge sealing structure that hermetically isolates the void 3 from the surrounding atmosphere.

As the peripheral edge sealing structure, the underlying metal layer 4 bonded to the opposing glass surfaces 2a of each peripheral edge portion 2 between the one glass plate 1A and the other glass plate 1B facing each other. And a low-melting metal brazing material layer 6 in which metal is bonded to both of the base metal layers 4 and the cover metal layers 5 are hermetically bonded to each other to form a five-layer structure. I am doing it.

The base metal layer 4 may be formed of a metal material having a lower oxidation reduction potential than that of the metal material forming each of the other layers, that is, the coating metal layer 5 and the low melting point metal brazing material layer 6. Preferably, nickel is selected and formed. When the redox potential of the metal forming each of the other layers is high, a metal having a higher redox potential than nickel can be selected, but from the viewpoint of easiness of plating on the glass surface, the glass composition There is a relationship with, and it cannot be determined in a general way.

The covering metal layer 5 is formed of a metal whose redox potential is higher than any of the redox potentials of the metals constituting the underlying metal layer 4 and the low melting point metal brazing material layer 6, respectively. Is preferred. Here, on the nickel plating layer 4A formed by chemically plating the glass surface 2a with nickel as the base metal, the metal having a high redox potential is used as a metal having a high redox potential, and is easily compatible with a low melting point metal wax described later and is easily available. From the point of view of choosing gold to be gold plated.
Incidentally, silver, platinum, copper and the like can also be selected as the metal which hardly forms an oxide film.

Lead tin solder is most suitable as the metal material for forming the low melting point metal brazing material layer 6 for hermetically joining the coated metal layers 5 formed on the two glass plates 1A and 1B. In particular, when a tin-lead alloy containing 62 to 64% by weight of tin and the remainder being lead is used, it melts at a temperature of 185 ° C. or lower, so that the heating temperature of the glass plate can be lowered. It should be noted that lead-tin solder, zinc-tin solder, zinc, and tin having other formulations do not adversely affect the glass plate due to heating, and are therefore preferably used.

In the glass panel constructed as described above, since the sealing structure of the glass plate peripheral portion 2 is based on metal plating and brazing (soldering), the plating layer can be made thin,
It is a glass panel with a small gap.

An example of the steps of assembling the above glass panel will be described below with reference to FIG. As described above, the gap 3 is formed between the two glass plates 1A and 1B constituting the glass panel to seal the peripheral edge portion 2. Then, the underlying metal layer 4 is laminated by chemical plating. As a specific example using nickel, which is one of the metals having a low redox potential, as the base metal, the base metal layer 4 is formed at the peripheral portion 2 of the glass plate 1.
A predetermined area to be coated with is subjected to catalytic treatment with a palladium chloride solution. Then, it is immersed in a known electroless nickel plating bath containing nickel sulfate and hypophosphite as main components (FIG. 5).
(See (a)). After a predetermined period of time, it is taken out, washed with water and dried to obtain the nickel-plated layer 4A as the base metal layer 4. The immersion time is generally about 10 to 20 minutes, but is appropriately set as the temperature of the plating bath and the like are adjusted in order to maintain the thickness of the nickel plating layer 4A and the surface gloss. Instead of the immersion in the bath, a liquid for forming the plating bath may be applied to the predetermined area. As described above, for example, the nickel plating layer 4A having a thickness of 0.1 to 2.0 μm
To form.

A metal material suitable for brazing is formed on the surfaces of both the base metal layers 4 formed as described above to form the coated metal layers 5 (see FIG. 5B). The purpose is to prevent oxidation of the nickel plating layer 4A. A specific description will be given of an example in which gold, which is hard to form an oxide film, is used as the coating metal. The nickel plating layer 4A is connected to the cathode side of a DC power source and immersed in an electrolytic bath for plating (plating bath). The electrodes are immersed in the same plating bath and an anodic voltage is applied. When the gold plating layer 5A of about 0.2 μm is formed, the power is turned off and the glass plate 1
Is removed from the plating bath and washed with water. The plating time depends on the applied voltage, the components of the plating bath and the temperature, and is appropriately adjusted. The gold plating may be chemical plating or other metal such as silver, platinum or copper may be plated.
The plating method of these other metals can be arbitrarily selected such as electroplating and chemical plating. Further, even if the thickness of the gold plating layer 5A is 0.1 μm or less, the function is sufficiently fulfilled.

The glass plates 1 are overlapped with the coated metal layers 5 facing each other, the low melting point metal brazing material is melted between the coated metal layers 5, and then solidified to solidify the two. A glass panel 1 is formed by providing a gap 3 between the glass plates 1 and sealing the peripheral portion of the gap 3 while integrating them (see FIG. 5D). This operation will be specifically described. The glass plate 1 having the gold plating layer 5A formed thereon.
Each of the peripheral portions is immersed for a short time in a molten zinc tin solder bath to form a solder film 8 for forming the low melting point metal brazing material layer 6 on the gold plating layer 5A (FIG. 5
(See (c)). Since the coating metal layer 5 is formed of the gold plating layer 5A, the molten solder film adheres on the gold plating layer 5A while preventing the base metal layer 4 from being corroded by the solder. Then, one glass plate 1A is attached to the molten solder film 8
It is placed flat with the side on which it is formed facing up, and if necessary, in order to secure the spacing of the voids 3, as the spacing member 7, for example, a nickel fine wire 7A having a diameter of 50 μm and having tin coated in advance on the ends thereof. Are arranged, and the other glass plate 1B is covered from above, and the whole is heated to melt the solder film 8 again, and cooled to form the low melting point metal brazing material layer 6. If the stacking, heating, and cooling are performed in a vacuum furnace, the inside of the void 3 can be maintained in a vacuum, so that the formed glass panel becomes a vacuum glass panel. The material and shape of the spacing member 7 may be arbitrary, and may be glass or other metal, and may be columnar, spherical, granular, flat, or any other shape.

As a result of constructing the peripheral edge sealing method as described above, it was possible to extremely easily form a glass panel having an extremely thin void.

[Other Embodiments] Hereinafter, different structures and methods according to the present invention regarding the peripheral edge sealing structure and the sealing method described in the above embodiments will be described. <1> In the above embodiment, an example in which the peripheral edge sealing structure has a five-layer structure has been described, but the coating metal layer 5 can be omitted, and the one glass plate 1A and the other glass plate facing each other can be omitted. 1B, a base metal layer 4 bonded to each of the opposing glass surfaces 2a of the respective peripheral edge portions 2, and a low melting point metal brazing material layer 6 in which the base metal layers 4 are hermetically metal-bonded to each other. It may be formed (see FIG. 1, for example). That is, in the example of the manufacturing method described above, after forming the nickel underlayer, the molten solder coating may be applied immediately without forming the gold plating layer 5A (see FIG. 2). As described above, the coating metal layer 5 is for improving the familiarity of solder (that is, an example of a low melting point metal brazing material) at the time of soldering (that is, brazing), and an oxide film is formed on the base metal layer 4. If brazing is done while not forming enough to interfere with brazing,
This is because brazing can be performed without forming the coating metal layer 5. In other words, the coating metal layer 5 simplifies the subsequent brazing process.

<2> In the above embodiment, an example in which the nickel plating layer 4A is used as the base metal layer 4 has been described.
The base metal layer 4 may be formed by chemically plating silver. It may also be formed by known copper plating. Whichever metal is selected, if the coating metal layer 5 is formed thereon, the subsequent brazing process can be facilitated or simplified.

<3> In the above, an example in which chemical plating is used to form the base metal layer 4 has been described. However, the base metal layer 4 applies chromium to the opposing glass surface 2a without chemical plating. It may be laminated. For example, the chromium vapor deposition layer 4B may be formed by a physical vapor deposition method (for example, PVD) in order to form the chromium in a laminated manner (see, for example, FIG. 4). In other words, when ultrafine particles of chromium are deposited and laminated on the glass surface in a vacuum, they are not bonded to oxygen, and since active chromium contacts the glass, it is extremely easy to bond with oxygen in the glass and A stable binding state is obtained. The physical vapor deposition method also includes irradiating a chromium target with an electron beam or an ion beam in a vacuum to deposit and stack chromium ultrafine particles on an object (in this case, the glass plate 1).
In this case, since the ultrafine particles of chromium are impacted by the charged particles when they are scattered, the ultrafine chromium particles reaching the glass surface 2a are activated and the adhesion to the glass becomes good. Alternatively, vapor deposition by CVD may be used, and in this case, the adhesion between the base metal layer 4 and the glass plate 1 is further improved.

<4> In the above, an example in which any one of nickel, silver, copper and chromium is used for the base metal layer 4 has been described. In short, the base metal layer 4 and the coating metal layer 5, It suffices that the metal material is selected and formed so as to be the lowest with respect to the redox potential of the other metal material forming the low melting point metal brazing material layer 6.

<5> In the above embodiment, an example in which the coating metal layer 5 is formed of the gold plating layer 5A has been described. However, in addition to this, it is formed of any metal of silver, platinum or copper. Good. Further, since the coating metal layer 5 is a coating for improving the familiarity of the metal brazing material with the base metal layer 4 as described above, it can be omitted, but a metal other than the above-exemplified metals is selected. There are possible metals,
In short, it is possible to use a metal that is hard to oxidize, preferably one that is easy to form a film on the underlying metal layer 4, and has a higher redox potential than the metal that forms the underlying metal layer 4. is there. Further, it is preferable that it has a redox potential equal to or higher than that of the metal brazing material deposited thereon.

<6> In the above embodiment, the coating metal layer 5 is formed on the underlying metal layer 4, a molten solder layer is formed on the coating metal layer 5, and the solder film 8 is formed by cooling. That is, an example has been described in which the glass plates 1 are overlapped with the low-melting metal brazing material layers 6 facing each other, the solder is melted again between the base metal layers 4, and then the solder is solidified. Both glass plates 1 are stacked with a solid low-melting metal brazing material interposed between the base metal layers 4, and the low-melting metal brazing material is melted by heating and then solidified again to lower the low-melting metal brazing material layer 6 May be formed, which may be between the coated metal layers 5. The main point of the present invention is that the peripheral portions of both glass plates 1 are directly joined or directly joined by a metal layer which can also serve as the spacing member 7. As the low-melting metal brazing material, a solder paste obtained by kneading a flux containing stearic acid, urea or the like as a component and solder fine particles is applied on the base metal layer 4 or the coating metal layer 5 and then applied. By overlapping and heating, the peripheral edge sealing structure of the glass panel can be formed.

<7> As the low melting point metal brazing material,
Lead-tin solder, zinc-tin solder, zinc shown in the above embodiment,
Of the tin, the latter three are preferable from the viewpoint of environmental protection,
Other alloys of zinc and tin can be used, and in addition to the above, a low melting point metal such as bismuth or its alloy can be used as the brazing material.

<8> The spacing agent 7 has a particle size of 0.1 μm or more and less than 10 μm (0.1 to 2 μm if desired).
m) powder, for example, silica sand, fused alumina, fly ash, or fine powder of ceramic, metal, glass, or the like may be randomly dispersed, which is inexpensive, and the spacing material is inconspicuous. Further, it is possible to form a good-looking glass panel in which interference fringes are not noticeable. In this case, the total thickness of the base metal layer 4, the coating metal layer 5, and the low melting point metal brazing material layer 6 is set to 0.1 to 10 μm according to the diameter of the powder or granular material.
And

<9> In the above embodiments, the material of the glass plate is not specifically shown, but this is because it is not necessary to specify the glass material, soda silicate glass (soda lime silica glass). It can be applied to borosilicate glass, aluminosilicate glass, and various crystallized glasses.

<10> The glass panel according to the present invention is used, for example, as a material for equipment for construction, for marine vehicles, surface glass for plasma displays, opening / closing doors and walls of refrigerators, opening / closing doors and walls of heat retaining devices, and the like. Is also versatile.

<11> Both glass plates 1 constituting the glass panel are not limited in size and shape, and can be formed in any shape and size.

[Brief description of drawings]

FIG. 1 is a partially cutaway perspective view showing an example of a glass panel according to the present invention.

FIG. 2 is a sectional view of an essential part showing an example of a peripheral edge sealing structure of a glass panel according to the present invention.

FIG. 3 is a sectional view of an essential part showing another example of the peripheral edge sealing structure for a glass panel according to the present invention.

FIG. 4 is a sectional view of an essential part showing another example of the peripheral edge sealing structure for a glass panel according to the present invention.

FIG. 5 is a process explanatory view showing an example of a manufacturing process of the glass panel according to the present invention.

FIG. 6 is a partially cutaway perspective view showing an example of a conventional glass panel.

[Explanation of symbols]

1 glass plate 1A One glass plate 1B The other glass plate 2 Glass plate periphery 2a The glass surface of the peripheral edge of the glass plate 3 void 4 Base metal layer 4B Chromium vapor deposition layer 5 Cover metal layer 6 Low melting point metal brazing material layer

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Yoshio Kaneshiro             1-18-1 Horikiri, Katsushika-ku, Tokyo Stock market             Inside Now Chemical (72) Inventor Koichi Sakaguchi             3-5-11 Doshomachi, Chuo-ku, Osaka-shi, Osaka               Within Nippon Sheet Glass Co., Ltd. F-term (reference) 2E016 AA01 AA04 AA06 AA07 BA01                       BA08 CA01 CB01 CC02 EA00                       EA01 EA03 FA02                 4G061 AA13 AA18 BA01 BA02 BA07                       BA10 CB02 CB04 CB14 CD02                       CD25 DA30

Claims (19)

[Claims] 1. A glass panel in which a void is formed between a plurality of glass plates, which is a glass panel peripheral edge sealing structure for airtightly isolating the void from the surrounding atmosphere, wherein the one glass faces each other. Between the plate and the other glass plate, a base metal layer bonded to each of the opposing glass surfaces of each peripheral portion, and a low melting point metal brazing material layer in which the base metal layers are hermetically metal-bonded to each other. A peripheral sealing structure for a glass panel in which the above is formed. 2. The peripheral edge sealing structure for a glass panel according to claim 1, wherein the underlying metal layer is formed by laminating nickel, silver or chromium on the opposing glass surfaces. 3. The glass panel peripheral edge sealing structure according to claim 2, wherein the underlying metal layer is formed by chemically plating nickel or silver on the opposing glass surfaces. 4. A chromium vapor deposition layer is formed by a physical vapor deposition method to form the chromium in a laminated manner.
The peripheral edge sealing structure of the glass panel described. 5. A glass panel in which a void is formed between a plurality of glass plates, which is a glass panel peripheral edge sealing structure for airtightly isolating the void from the ambient atmosphere, wherein the one glass faces each other. Between the plate and the other glass plate, the underlying metal layer bonded to the opposing glass surfaces of the respective peripheral edge portions, the coating metal layer metal-bonded to both the underlying metal layers, and the both coating metal layers A low-melting-point metal brazing material layer, which is airtightly metal-bonded to each other, is a peripheral edge sealing structure of a glass panel. 6. The glass panel according to claim 5, wherein the base metal layer is formed by selecting a metal material so that it is the lowest with respect to the redox potential of the metal material forming each of the other layers. The peripheral edge sealing structure. 7. The base metal layer is formed of nickel, chromium,
7. A metal selected from silver and copper.
The peripheral edge sealing structure of the glass panel described. 8. The coating metal layer is formed of gold, silver, platinum, copper,
8. A metal selected from tin.
The peripheral edge sealing structure for a glass panel according to claim 1. 9. The metal material forming the low-melting-point metal brazing material layer contains, as a main component, one or more of bismuth, lead, tin, zinc, indium, and antimony. The glass panel peripheral edge sealing structure according to any one of items 1 to 8. 10. The sealing structure for a peripheral portion of a glass panel according to claim 9, wherein the metal material contains at least one of silver and aluminum as an accessory component. 11. A particle size of 0.1 μm or more in the voids 1
The powder particles of less than 0 μm are dispersed and interposed.
10. The peripheral sealing structure for a glass panel according to any one of items 10 to 10. 12. A method for sealing a peripheral portion of a glass panel, wherein a gap between a plurality of glass plates formed in a glass panel is airtightly isolated from an ambient atmosphere. A base metal layer is formed in each of the regions, and the two plate glasses are stacked with the base metal layer facing each other, and the low-melting metal brazing material is melted between the base metal layers,
A method for sealing a peripheral portion of a glass panel which is subsequently solidified. 13. The method for sealing a peripheral portion of a glass panel according to claim 12, wherein a metal selected from nickel, copper, and silver is plated to form the underlying metal layer in a laminated manner. 14. The method for sealing a peripheral edge portion of a glass panel according to claim 12, wherein metal chromium is formed by a physical vapor deposition method to form the underlying metal layer in a laminated manner. 15. A method of sealing a peripheral edge of a glass panel, wherein a void of a glass panel in which a void is formed between a plurality of glass plates is airtightly isolated from an ambient atmosphere. A base metal layer is laminated on each of the regions, a coating metal layer of a metal material suitable for brazing is formed on the surface of each of the base metal layers, and the both glass plates are opposed to each other. By superposing, melting the low melting point metal brazing material between the both coating metal layers,
A method for sealing a peripheral portion of a glass panel which is subsequently solidified. 16. The glass according to claim 15, wherein a metal material having a lower redox potential than any of the metal material forming the coating metal layer and the low melting point metal brazing material is used to form the base metal layer. A method for sealing the peripheral edge of a panel. 17. The method for sealing a peripheral portion of a glass panel according to claim 16, wherein at least one metal selected from nickel, copper, and silver is plated to form the underlying metal layer in a laminated manner. 18. The method of encapsulating a peripheral portion of a glass panel according to claim 15, wherein metal chromium is physically vapor-deposited when the underlying metal layer is laminated. 19. Gold for forming the coating metal layer,
The glass panel peripheral edge sealing method according to any one of claims 15 to 18, wherein at least one metal material selected from silver, platinum, and copper is plated.