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Sealing-in method for glass and kovar alloy and sealed body

A technology of alloy and glass, which is applied in the field of connection of heterogeneous materials, can solve the problems of mismatch of thermal physical properties of glass and alloy, decrease of joint strength, low joint strength, etc., to adapt to flexible manufacturing environment, high processing efficiency, and improve use The effect of longevity

Active Publication Date: 2014-05-14
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] As far as glass-to-metal joints are concerned, in the process of connecting glass to Kovar alloy, due to the mismatch between the thermophysical properties of glass and alloy, glass-to-metal joints often produce huge residual thermal stress after welding, and as they are connected The greater the difference in expansion coefficient between the glass and the metal, the greater the residual thermal stress of the joint, resulting in lower strength of the joint; or as the product of the thermal expansion coefficient of the metal being connected and its elastic modulus increases, the strength of the joint decreases

Method used

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  • Sealing-in method for glass and kovar alloy and sealed body

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Clean the window glass sample with a size of 8×20×4mm (length×width×thickness), and degrease and degrease the Kovar alloy steel plate with a size of 10×25×1.5mm (length×width×thickness) . Then oxidize the Kovar alloy steel plate. During the oxidation treatment, the oxidation treatment temperature was controlled at 700° C. and kept for 10 minutes, and the thickness of the formed oxide layer was controlled at 3 μm.

[0041] Mix 90% glass powder with 10% Kovar powder and mix in a ball mill for 4 hours. After taking it out, keep it in a vacuum oven at 200°C for 2 hours, and form solder with the furnace cooling, take it out and set it aside. Among them, the glass powder includes the following components according to the mass percentage: 50.81% SiO2 , 8.05% CaO, 33.55% Na 2 O. The particle size is 150 mesh. The particle size of glass powder and kovar alloy powder is 150 mesh.

[0042] In an argon atmosphere, evenly spray the solder on the surrounding edges of the metal ...

Embodiment 2

[0046] Clean the window glass sample with a size of 8×20×4mm (length×width×thickness), and degrease and degrease the Kovar alloy steel plate with a size of 10×25×1.5mm (length×width×thickness) . Then oxidize the Kovar alloy steel plate. During the oxidation treatment, the oxidation treatment temperature was controlled at 800° C. and kept for 20 minutes, and the thickness of the formed oxide layer was controlled at 7 μm.

[0047] The glass powder with a mass fraction of 99% was mixed with 1% Kovar alloy powder and mixed in a ball mill for 7 hours. After taking it out, keep it in a vacuum oven at 200°C for 3 hours, and form solder with the furnace cooling, take it out and set it aside. Among them, the glass powder includes the following components according to the mass percentage: 28.75% SiO 2 , 13.84% CaO, 46.21% Na 2 O. The particle size of glass powder and kovar alloy powder is 200 mesh.

[0048] Under the argon atmosphere, the solder is evenly sprayed on the surroundin...

Embodiment 3

[0052] Clean the window glass sample with a size of 8×20×4mm (length×width×thickness), and degrease and degrease the Kovar alloy steel plate with a size of 10×25×1.5mm (length×width×thickness) . Then oxidize the Kovar alloy steel plate. During the oxidation treatment, the oxidation treatment temperature was controlled at 780° C. and kept for 18 minutes, and the thickness of the formed oxide layer was controlled at 5.5 μm.

[0053] Mix glass powder with a mass fraction of 95% and Kovar powder with a mass fraction of 5%, and mix them in a ball mill for 7 hours. After taking it out, keep it in a vacuum oven at 200°C for 5 hours, then cool down in the furnace to form solder, and take it out for use. Wherein the glass powder comprises the following components by mass percentage: 50% SiO 2 , 10% CaO, 40% Na 2 O. The particle size of the glass powder is 180 mesh, and the particle size of the Kovar alloy powder is 190 mesh.

[0054] Under the argon atmosphere, the solder is even...

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Abstract

The invention discloses a sealing-in method for glass and a kovar alloy and a sealed body. The sealing-in method comprises the following steps of S1, purifying the glass to be sealed and the kovar ally to be sealed; S2, providing glass powder and metal powder which have the particle sizes of 150-200 meshes, and mixing and grinding the powder to prepare a welding flux; S3, uniformly spraying the welding flux in the step S2 to the surrounding edge of the kovar ally to be sealed; and putting the glass to be sealed on the kovar alloy, wherein the glass and the kovar alloy are in tight contact; S4, irradiating the welding flux at an intersection of the glass to be sealed and the kovar alloy to be sealed through laser to obtain the sealing body formed by the glass and the kovar alloy. According to the sealing-in method for the glass and the kovar alloy, the welding flux is added to the intersection of the glass and the kovar alloy, and the intersection of the glass and the kovar alloy is straightly irradiated with laser, so that the problem of laser processing difficulty caused by high glass laser transmittance rate is solved, and the glass and the kovar alloy can be tightly connected and sealed.

Description

technical field [0001] The invention relates to the technical field of connection of heterogeneous materials, in particular to a sealing method of glass and Kovar alloy and a sealing body obtained by the sealing method. Background technique [0002] Insulating glass is a glass product in which two or more layers of glass are evenly separated by a spacer, the edges are sealed, and a dry still gas is formed in the middle. Specifically, the thickness of the space between the above-mentioned layers of glass is generally 6, 9, 12mm, and the edge is sealed with a composite rubber strip, or the edge is sealed with aluminum butyl glue and polysulfide glue, when the spacer is gas , the gas can be air or inert gas, etc. Insulating glass is widely used because of its thermal insulation and sound insulation. [0003] Based on the above insulating glass, glass can also be combined with Kovar alloy to form a glass-Kvar alloy seal. Among them, Kovar alloy, also known as iron-nickel-coba...

Claims

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Application Information

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IPC IPC(8): C03C27/00
Inventor 张敏陈长军王晓南刘星万德田
Owner SUZHOU UNIV
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