CN114541933A - Edge sealing structure and edge sealing method for vacuum glass - Google Patents

Edge sealing structure and edge sealing method for vacuum glass Download PDF

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Publication number
CN114541933A
CN114541933A CN202210369727.1A CN202210369727A CN114541933A CN 114541933 A CN114541933 A CN 114541933A CN 202210369727 A CN202210369727 A CN 202210369727A CN 114541933 A CN114541933 A CN 114541933A
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glass
layer
edge sealing
glass plate
airtight
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王万甫
孙诗兵
孙景春
蒋毅
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Sichuan Linglinghao Technology Co ltd
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Sichuan Linglinghao Technology Co ltd
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    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B3/00—Window sashes, door leaves, or like elements for closing wall or like openings; Layout of fixed or moving closures, e.g. windows in wall or like openings; Features of rigidly-mounted outer frames relating to the mounting of wing frames
    • E06B3/66—Units comprising two or more parallel glass or like panes permanently secured together
    • E06B3/663—Elements for spacing panes
    • E06B3/66309—Section members positioned at the edges of the glazing unit
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C27/00—Joining pieces of glass to pieces of other inorganic material; Joining glass to glass other than by fusing
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62—Insulation or other protection; Elements or use of specified material therefor
    • E04B1/66—Sealings
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B2/00—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls
    • E04B2/88—Curtain walls
    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B3/00—Window sashes, door leaves, or like elements for closing wall or like openings; Layout of fixed or moving closures, e.g. windows in wall or like openings; Features of rigidly-mounted outer frames relating to the mounting of wing frames
    • E06B3/66—Units comprising two or more parallel glass or like panes permanently secured together
    • E06B3/6612—Evacuated glazing units
    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B3/00—Window sashes, door leaves, or like elements for closing wall or like openings; Layout of fixed or moving closures, e.g. windows in wall or like openings; Features of rigidly-mounted outer frames relating to the mounting of wing frames
    • E06B3/66—Units comprising two or more parallel glass or like panes permanently secured together
    • E06B3/663—Elements for spacing panes
    • E06B3/66309—Section members positioned at the edges of the glazing unit
    • E06B3/66342—Section members positioned at the edges of the glazing unit characterised by their sealed connection to the panes
    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B3/00—Window sashes, door leaves, or like elements for closing wall or like openings; Layout of fixed or moving closures, e.g. windows in wall or like openings; Features of rigidly-mounted outer frames relating to the mounting of wing frames
    • E06B3/66—Units comprising two or more parallel glass or like panes permanently secured together
    • E06B3/663—Elements for spacing panes
    • E06B3/667—Connectors therefor
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B80/00—Architectural or constructional elements improving the thermal performance of buildings
    • Y02B80/22—Glazing, e.g. vaccum glazing

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  • Engineering & Computer Science (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Architecture (AREA)
  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Ceramic Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Joining Of Glass To Other Materials (AREA)

Abstract

The invention provides an edge sealing structure of vacuum glass, which comprises an airtight structure and at least two bonding structures, wherein the airtight structure and the at least two bonding structures are annularly arranged at the edge position between two glass plates. The bonding structures and the airtight structures are arranged in parallel along the direction from the edge of the glass plate to the center of the glass plate and are mutually and hermetically connected, and the airtight structures are hermetically connected between the two adjacent bonding structures; the airtight structure comprises an airtight layer, and two opposite surfaces of the airtight layer, which are respectively close to the two glass plates, are respectively connected with the two glass plates in a sealing way; the bonding structure comprises two transition layers and a metal layer which are arranged in a laminated mode along the direction of one glass plate towards the other glass plate; the metal layer is arranged between the two transition layers, and the two transition layers are respectively connected with the two glass plates in a sealing way. Through the matching of the bonding structure and the airtight structure, when the transition layer of the edge sealing structure is made of low-cost copper, the requirement of the vacuum glass during use can be met, and therefore the selection range of the raw materials of the transition layer during edge sealing of the vacuum glass is expanded.

Description

Edge sealing structure and edge sealing method for vacuum glass
Technical Field
The invention relates to the technical field of edge sealing of vacuum glass, in particular to an edge sealing structure of vacuum glass and an edge sealing method thereof.
Background
And (3) supporting the two pieces of flat glass by using tiny supports distributed in a dot matrix, sealing the edges of the two pieces of flat glass by using a sealing material to form a sealed enclosure, and vacuumizing the space between the two pieces of flat glass of the enclosure to form the flat vacuum glass. The edge sealing is a substance entity formed by the sealing materials around the vacuum glass, and also refers to a process for connecting two pieces of flat glass together. The edge sealing structure is a structure for connecting two pieces of flat glass and is also a key for forming a vacuum-pumping space by the two pieces of glass, so that the edge sealing structure and the two pieces of glass are required to have enough bonding strength (not less than 0.7MPa) and enough air tightness so as to ensure the application of the vacuum glass. In addition, in order to ensure that the edge sealing does not affect the visual effect of doors, windows and curtain walls, the width of the edge sealing is generally required to be 8-12 mm.
The flat glass used by the existing vacuum glass is required to be toughened glass, and the toughened glass is formed by heating the glass to a toughening temperature (about 700 ℃), and then blowing air to forcibly cool the glass so as to generate compressive stress on the surface of the glass. Reheating tempered glass above 300 c causes a stress relief, known as temper annealing. The basic requirement for vacuum glass preparation is to prevent annealing and tempering during edge sealing of the vacuum glass, so that the temperature during edge sealing is required to be as low as possible, and the most ideal edge sealing material is the edge sealing material with the melting point below 300 ℃.
The edge sealing material used more commonly is a metal material with a melting point lower than 300 ℃, but metal bonds of metal and ionic covalent bonds of glass are different, so that the metal and the glass are difficult to combine (i.e. seal), and therefore, transition layers are generally required to be respectively arranged on two pieces of safety glass when the edge sealing is performed by using the metal material. The transition layer is required to have excellent bonding strength with glass, high bonding performance with a metal edge sealing material and excellent air tightness with the metal edge sealing material. Researchers find that indium and silver are used as transition layers to meet the requirements of bonding strength and air tightness of the glass edge sealing, but the price of the silver and the indium is high, so that the cost of the vacuum glass edge sealing is high, and the air tightness of the edge sealing obtained by directly replacing the silver or the indium with other metals with low price is low, so that the requirements of the vacuum glass are not met, and the selection range of the raw materials of the transition layers during the edge sealing of the vacuum glass is greatly limited.
Disclosure of Invention
The invention aims to solve the technical problem that in the prior art, the metal silver or indium is used as a transition layer to carry out edge sealing, the price is higher, and other metals with lower price are used as the transition layer to hardly meet the requirement of air tightness, so that the selection range of the raw materials of the transition layer is limited when the edge sealing is carried out on vacuum glass.
Therefore, the invention provides an edge sealing structure of vacuum glass, which comprises:
the glass plate comprises a bonding structure and an airtight structure which are arranged between two glass plates, wherein the bonding structure and the airtight structure are arranged in parallel along the direction from the edge of the glass plate to the center of the glass plate and are mutually and hermetically connected;
the bonding structures are at least two, and the airtight structures are connected between two adjacent bonding structures in a sealing mode;
the airtight structure comprises an airtight layer, and two opposite surfaces of the airtight layer, which are respectively close to the two glass plates, are respectively connected with the two glass plates in a sealing manner;
the bonding configuration includes:
the two transition layers are respectively connected with the two glass plates in a sealing way;
and the metal layer is hermetically connected between the two transition layers and is hermetically connected with the airtight structure.
Optionally, the metal layer and the airtight layer are integrally formed.
Optionally, the overall width of the air-tight construction is 2/5-3/5 of the width of the edge seal structure.
Optionally, the thickness of the transition layer is 10-50 μm.
Optionally, the material of the transition layer is selected from one of copper, gold, indium and silver, and copper is preferred.
Optionally, the metal layer is made of a metal material with a melting point not higher than 300 ℃; preferably, it is selected from tin or tin alloys.
Optionally, the material of the air-tight layer is a metal material with a melting point not higher than 300 ℃; preferably, it is selected from tin or tin alloys.
The invention also provides an edge sealing method of the edge sealing structure of the vacuum glass, wherein the transition layer is sintered on the glass plate in the toughening process of the glass plate, and the metal layer and the air-tight layer are synchronously sintered in the edge sealing process.
Optionally, the edge sealing method includes the following steps:
obtaining a glass plate with two pretreated surfaces;
respectively printing the raw materials of the transition layer to the corresponding positions of the edge sealing areas of the two glass plates, then conveying the glass plates to a tempering furnace for tempering and sintering, and sintering the raw materials of the transition layer on the glass plates to form the transition layer while tempering;
placing a support, a getter, a metal layer material and an air-tight layer material at the corresponding position of any one glass plate, then stacking and aligning the other glass plate to enable a transition layer to face to the metal layer, then sending the stacked glass plates into a vacuum heating furnace, vacuumizing, heating, preserving heat and cooling.
The technical scheme of the invention has the following advantages:
1. the bonding structure and the airtight structure of the vacuum glass provided by the invention respectively play a bonding function and a sealing function, and the airtight structure is independently arranged, so that the bonding structure in the invention can select high-price metal with high airtightness and bonding strength, such as silver and indium, and the like, disclosed in the prior art, and can also select low-cost metal with relatively low airtightness, such as copper, and the like, as the raw material of the transition layer. For example: in the manufacturing process of preparing the transition layer by using copper metal as a raw material of the transition layer, the copper metal is oxidized into a copper oxide layer, and the bonding strength between the copper oxide layer and glass is higher, so that the increase of an airtight structure can be realized under the condition of the same edge sealing width, and the airtightness is further improved. Therefore, the purpose of simultaneously meeting the requirements of bonding strength and air tightness is achieved by the mutual matching of the at least two bonding structures and the at least one air-tight structure, the structure of the vacuum glass edge sealing device can meet the requirements of the vacuum glass in use, and the effect of expanding the selection range of the transition layer raw materials when the vacuum glass is subjected to edge sealing is achieved.
2. The raw material of the transition layer is preferably copper, and when the copper is selected as the raw material of the transition layer, the cost of glass edge sealing is greatly reduced, so that the vacuum glass can be widely used.
3. According to the edge sealing structure of the vacuum glass, the metal layer and the airtight layer are made of tin or tin alloy, the price of the tin or tin alloy is low, the cost of the glass edge sealing is further reduced, the melting point of tin is only 232 ℃, the temperature deviating from the strain point of the glass is high, and the possibility of tempering tempered glass during edge sealing is greatly reduced.
4. According to the edge sealing method provided by the invention, when the raw material of the transition layer is copper, the transition layer is fired while the transition layer is tempered, the firing method is simpler and convenient to operate, the obtained edge sealing structure has higher bonding strength, the air tightness can be kept for a long time through the matching of the air tightness structure, and the requirement of the performance of the vacuum glass is met.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic structural view of an edge sealing arrangement for vacuum glass according to an embodiment of the present invention;
FIG. 2 is a schematic structural view of an edge banding arrangement for vacuum glass provided in accordance with a comparative example of the present invention.
Description of reference numerals: 1. a transition layer; 2. a metal layer; 3. an airtight layer; 4. and a support.
Detailed Description
The following examples are provided to further understand the present invention, not to limit the scope of the present invention, but to provide the best mode, not to limit the content and the protection scope of the present invention, and any product similar or similar to the present invention, which is obtained by combining the present invention with other prior art features, falls within the protection scope of the present invention.
The examples do not show the specific experimental steps or conditions, and can be performed according to the conventional experimental steps described in the literature in the field. The reagents or instruments used are not indicated by manufacturers, and are all conventional reagent products which can be obtained commercially.
The support is a commercially available metal support column with the diameter of 0.6mm and the thickness of 0.2mm, and is purchased from Beijing Oriental Hua micro-technology Co Ltd;
the glass is commercially available 5mm first-class flat glass and is purchased from Taizhuogdu glass Limited company;
the tin-indium alloy is a commercially available tin-indium alloy wire with the diameter of 1.0mm, and is purchased from Hongxiang vacuum science and technology limited company in Foshan;
the organic blending agent is a sodium nitrophenolate solution sold in the market, has the model of ZK-1750G, and is purchased from Beijing eight-five science and technology Limited company;
the getter is a commercially available iron zirconate getter with the model number of TK177, and is purchased from Nanjing Shang Engineer New Material science and technology Limited company.
Example 1
The present embodiment provides an edge sealing structure for vacuum glass, which comprises a support 4 annularly arranged at the edge position between two glass plates, an adhesive structure and an airtight structure, and is shown in fig. 1. The bonding structures and the airtight structures are arranged in parallel along the direction from the edge of the glass plate to the center of the glass plate and are mutually and hermetically connected, at least two bonding structures are arranged, and the airtight structures are hermetically connected between every two adjacent bonding structures. The number of the bonding structures may be plural, for example, three or four, and an airtight structure may be provided between each two adjacent bonding structures. In this embodiment, there are two bonding formations, with the airtight formation between the two bonding formations.
Referring to fig. 1, the airtight structure includes an airtight layer 3, and opposite surfaces of the airtight layer 3, which are respectively adjacent to the two glass plates, are respectively hermetically connected to the two glass plates. The bonding structure comprises two transition layers 1 and a metal layer 2 which are laminated along the direction of one glass plate facing to the other glass plate; the metal layer 2 is arranged between the two transition layers 1, and the two transition layers 1 are respectively connected with the two glass plates in a sealing way.
When the low-cost copper metal is selected as the raw material of the transition layer 1, the copper metal is oxidized into a copper oxide layer in the manufacturing process of the transition layer 1, the bonding strength of the copper oxide layer and the glass is high, the air tightness of the edge sealing structure is improved through the matching of the bonding structure and the air tightness structure, the requirements of the vacuum glass during use can be met, and the selection range of the raw material of the transition layer 1 during edge sealing of the vacuum glass is expanded. And when copper is selected as the raw material of the transition layer 1, the cost of glass edge sealing is greatly reduced, so that the vacuum glass can be widely used.
The edge sealing method of the edge sealing structure in the embodiment comprises the following steps:
s1, cutting two glass plates with the same size, dividing the glass plates into an upper glass plate and a lower glass plate, prefabricating a circular groove with the depth of 2mm and the diameter of 8mm on the lower glass plate, edging the glass plates, and cleaning for later use;
s2, adding 1mL of organic blending agent into each 3g of copper powder to prepare slurry, respectively printing the slurry on the edge sealing areas of the upper glass plate and the lower glass plate obtained in the step S1 by using a 300-mesh screen printing method according to a screen printing method to serve as transition layers, enabling the printed slurry to be of a double-row structure on the glass plates, enabling gaps to be reserved between the double-row slurry, enabling the width of the gaps between the double-row slurry to be 4mm, enabling the sum of the width of the double-row slurry and the width of the gaps to be 10mm, then conveying the glass plates to a tempering furnace to temper, synchronously sintering the transition layers, and enabling the thickness of the transition layers on the tempered glass plates to be 30 mu m;
s3, placing supports on the toughened lower glass plate at 40mm intervals, placing getters in the grooves, placing tin on the transition layers and the positions where gaps are left in the double-row transition layers to enable the tin to cover the gaps between the transition layers and the double-row transition layers, stacking and aligning the toughened upper glass plate and the toughened lower glass plate, then feeding the stacked glass plates into a vacuum heating furnace, and vacuumizing to 5 x 10-4Pa, heating to 260 ℃, preserving heat for 20min, and then cooling along with the furnace.
Example 2
This example provides an edge seal configuration for vacuum glass that is substantially identical in composition to the edge seal configuration of example 1, except that the dimensions of the various features are different.
The edge sealing method of the edge sealing structure in the embodiment comprises the following steps:
s1, cutting two glass plates with the same size, dividing the glass plates into an upper glass plate and a lower glass plate, prefabricating a circular groove with the depth of 2mm and the diameter of 8mm on the lower glass plate, edging the glass plates, and cleaning for later use;
s2, adding 1mL of organic blending agent into each 3g of copper powder to prepare slurry, respectively printing the slurry on the edge sealing areas of the upper glass plate and the lower glass plate obtained in the step S1 by using a 300-mesh screen printing method according to a screen printing method to serve as transition layers, enabling the printed slurry to be of a double-row structure on the glass plates, enabling gaps to be reserved between the double-row slurry, enabling the width of the gaps between the double-row slurry to be 7.2mm, enabling the sum of the width of the double-row slurry and the width of the gaps to be 12mm, then sending the glass plates to a tempering furnace to be tempered, synchronously sintering the transition layers, and enabling the thickness of the transition layers on the tempered glass plates to be 30 micrometers;
s3, placing supports on the tempered lower glass plate at a distance of 45mm, placing getters in the grooves, placing tin on the transition layer and the positions with gaps in the double-row transition layer to enable the tin to cover the transition layer and the positions with gaps in the double-row transition layer, and then stacking the tempered upper glass plate and the tempered lower glass plateAligning, and vacuumizing to 5 × 10-4Pa, heating to 260 ℃, preserving heat for 20min, and then cooling along with the furnace.
Example 3
This example provides an edge seal configuration for vacuum glass that is substantially identical in composition to the edge seal configuration of example 1, except that the dimensions of the various features are different.
The edge sealing method of the edge sealing structure in the embodiment comprises the following steps:
s1, cutting two glass plates with the same size, dividing the glass plates into an upper glass plate and a lower glass plate, prefabricating a circular groove with the depth of 2mm and the diameter of 8mm on the lower glass plate, edging the glass plates, and cleaning for later use;
s2, adding 1mL of organic blending agent into each 3g of copper powder to prepare slurry, respectively printing the slurry on the edge sealing areas of the upper glass plate and the lower glass plate obtained in the step S1 by using a 200-mesh screen printing method according to a screen printing method to serve as transition layers, enabling the printed slurry to be of a double-row structure on the glass plates, enabling gaps to be reserved between the double-row slurry, enabling the width of the gaps between the double-row slurry to be 4mm, enabling the sum of the width of the double-row slurry and the width of the gaps to be 10mm, then conveying the glass plates to a tempering furnace to temper, synchronously sintering the transition layers, and enabling the thickness of the transition layers on the tempered glass plates to be 50 mu m;
s3, placing supports on the toughened lower glass plate at intervals of 50mm, placing getters in the grooves, placing tin on the transition layers and the positions with gaps in the double-row transition layers to enable the tin to cover the gaps in the transition layers and the double-row transition layers, stacking and aligning the toughened upper glass plate and the toughened lower glass plate, then feeding the stacked glass plates into a vacuum heating furnace, and vacuumizing to 5 x 10-4Pa, heating to 260 ℃, preserving heat for 20min, and then cooling along with the furnace.
Example 4
This example provides an edge seal configuration for vacuum glass that is substantially identical in composition to the edge seal configuration of example 1, except that the dimensions of the various features are different.
The edge sealing method of the edge sealing structure in the embodiment comprises the following steps:
s1, cutting two glass plates with the same size, dividing the glass plates into an upper glass plate and a lower glass plate, prefabricating a circular groove with the depth of 2mm and the diameter of 8mm on the lower glass plate, edging the glass plates, and cleaning for later use;
s2, adding 1mL of organic blending agent into each 3g of copper powder to prepare slurry, respectively printing the slurry on the edge sealing areas of the upper glass plate and the lower glass plate obtained in the S1 by using a 350-mesh screen printing method according to a screen printing method to serve as transition layers, enabling the printed slurry to be of a double-row structure on the glass plates, and enabling gaps to be reserved between the double-row slurry, the width of the gaps between the double-row slurry is 6mm, the sum of the width of the double-row slurry and the width of the gaps is 10mm, then conveying the glass plates into a tempering furnace to be tempered and sintered, and enabling the thickness of the transition layers on the tempered glass plates to be 10 micrometers;
s3, placing supports on the toughened lower glass plate at 45mm intervals, placing getters in the grooves, placing tin-indium alloy on the transition layers and the positions where gaps are left in the double-row transition layers to enable the tin-indium alloy to cover the gaps between the transition layers and the double-row transition layers, stacking and aligning the toughened upper glass plate and the toughened lower glass plate, feeding the stacked glass plates into a vacuum heating furnace, and vacuumizing to 5 multiplied by 10-4Pa, heating to 260 ℃, preserving heat for 20min, and then cooling along with the furnace.
Comparative example 1
The present comparative example provides a glass edge sealing structure annularly disposed at an edge position between two glass sheets, as shown in fig. 2, and including two transition layers and a metal layer stacked in a direction from one of the glass sheets toward the other glass sheet; the metal layer is arranged between the two transition layers.
The edge sealing method of the edge sealing structure in the comparative example comprises the following steps:
s1, cutting two glass plates with the same size, dividing the glass plates into an upper glass plate and a lower glass plate, prefabricating a circular groove with the depth of 2mm and the diameter of 8mm on the lower glass plate, edging the glass plates, and cleaning for later use;
s2, adding 1mL of organic blending agent into each 3g of copper powder to prepare slurry, respectively printing the slurry on the edge sealing areas of the upper glass plate and the lower glass plate obtained in the step S1 by using a 300-mesh screen printing method according to a screen printing method to form transition layers, enabling the width of the transition layers to be 10mm, then conveying the glass plates to a tempering furnace to perform tempering and sintering, and enabling the thickness of the transition layers on the tempered glass plates to be 30 micrometers;
s3, placing supports on the toughened lower glass plate at a distance of 40mm, placing getters in the grooves, placing tin on the transition layer to cover the transition layer, stacking and aligning the toughened upper glass plate and the toughened lower glass plate, feeding the stacked glass plates into a vacuum heating furnace, and vacuumizing to 5 x 10-4Pa, heating to 260 ℃, preserving heat for 20min, and then cooling along with the furnace.
Test example 1
Preparing bonding strength test samples according to the processes of the examples and the comparative examples, and carrying out bonding strength test, wherein the test method comprises the following steps: the mechanical property test method of the sealing glass for the vacuum glass (GB/T34338-.
Test example 2
The air tightness retention degree of the vacuum glass after edge sealing of the examples and the comparative examples is tested, and the test method comprises the following steps: the vacuum glass sample was evacuated using a high vacuum apparatus, and the degree of vacuum (pressure value) reached after 1 hour was recorded, and the test results are shown in table 1.
TABLE 1 test results of the test examples
Figure BDA0003587693010000111
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.

Claims (9)

1. An edge sealing structure for vacuum glass, comprising: the bonding structure and the airtight structure are annularly arranged at the edge position between the two glass plates, and are arranged in parallel along the direction from the edge of the glass plate to the center of the glass plate and are mutually and hermetically connected;
the bonding structures are at least two, and the airtight structures are connected between two adjacent bonding structures in a sealing mode;
the airtight structure comprises an airtight layer, and two opposite surfaces of the airtight layer, which are respectively close to the two glass plates, are respectively connected with the two glass plates in a sealing manner;
the bonding structure comprises two transition layers and a metal layer which are arranged in a laminated mode along the direction from one glass plate to the other glass plate; the metal layer is arranged between the two transition layers, and the two transition layers are respectively connected with the two glass plates in a sealing mode.
2. The edge banding structure of claim 1, wherein said metal layer is integrally formed with said hermetic layer.
3. An edge seal arrangement for vacuum glass according to claim 1 or claim 2, wherein the total width of the airtight arrangement is 2/5-3/5 of the width of the edge seal arrangement.
4. An edge sealing structure according to any one of claims 1 to 3, wherein the thickness of the transition layer is in the range 10 to 50 μm.
5. The edge sealing structure for vacuum glass according to any one of claims 1 to 4, wherein the transition layer is made of a material selected from the group consisting of copper, gold, indium and silver.
6. An edge sealing structure according to any one of claims 1 to 5, wherein the metal layer is made of a metallic material having a melting point of not higher than 300 ℃; preferably, it is selected from tin or tin alloys.
7. An edge sealing structure for vacuum glass according to any one of claims 1 to 6, wherein the material of the air-tight layer is a metal material having a melting point of not higher than 300 ℃; preferably, it is selected from tin or tin alloys.
8. An edge sealing method according to any one of claims 1 to 7, wherein the transition layer is sintered to the glass sheet during tempering of the glass sheet, and the metal layer and the air barrier are simultaneously sintered during the edge sealing process.
9. An edge sealing method according to claim 8, when the material of the transition layer is selected from copper, comprising the steps of:
obtaining a glass plate with two pretreated surfaces;
respectively printing the raw materials of the transition layer to the corresponding positions of the edge sealing areas of the two glass plates, then conveying the glass plates to a tempering furnace for tempering and sintering, and sintering the raw materials of the transition layer on the glass plates to form the transition layer while tempering;
placing a support, a getter, a metal layer material and an air-tight layer material at the corresponding position of any one glass plate, then stacking and aligning the other glass plate, enabling the transition layer on one glass plate to face the transition layer on the other glass plate, then sending the stacked glass plates into a vacuum heating furnace, vacuumizing, heating, preserving heat and cooling.
CN202210369727.1A 2022-04-08 2022-04-08 Edge sealing structure and edge sealing method for vacuum glass Pending CN114541933A (en)

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Application Number Priority Date Filing Date Title
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CN114541933A true CN114541933A (en) 2022-05-27

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