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Laser sealing method and sealing body of glass and Kovar alloy

A technology of alloy and glass, which is applied in the field of sealing of heterogeneous materials, can solve the problems of low connection strength, and achieve the effect of avoiding glass bursting, avoiding excessive heat input, tight connection and sealing

Active Publication Date: 2018-06-29
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In view of this, the object of the present invention is to provide a laser sealing method of glass and Kovar alloy and the sealing body of glass and Kovar alloy made by the method, and the method fully solves the gap between glass and Kovar alloy. Solve the problem of low connection strength, and at the same time make a sealed body with high connection strength

Method used

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  • Laser sealing method and sealing body of glass and Kovar alloy

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Effect test

Embodiment 1

[0038] S1. According to the size and shape of the glass and Kovar alloy to be sealed, set the processing track and prepare the welding fixture. In this embodiment, the glass to be sealed is a window glass sample of 8*20*4 mm, and the Kovar alloy is a Kovar alloy steel plate of 10*25*1.5 mm.

[0039] S2. Perform pre-sealing purification pretreatment on the glass and Kovar alloy to be sealed, and provide Ag-Cu-Ti powder with a particle size of 5-50 μm or Ag-Cu-Ti foil with a thickness of 20-100 μm sheet as solder.

[0040] Among them, the pre-sealing and purification pretreatment operations respectively refer to degreasing and degreasing the Kovar alloy to be sealed and then performing oxidation treatment; washing the glass to be sealed with clean water, and then cooling and air-drying.

[0041]The Ag-Cu-Ti powder or Ag-Cu-Ti foil as solder comprises the following components by mass fraction: 66% Ag, 30% Cu, 4.0% Ti, and the Ag used in the present invention -Cu-Ti powder or Ag...

Embodiment 2

[0048] The difference between this embodiment and Embodiment 1 is that the components of the solder used include 72% Ag, 25% Cu, and 3.0% Ti by mass fraction, the thickness of the solder is 32 μm, and the wavelength is 1000 nm. Nd-YAG laser, the processing trajectory set by the Nd-YAG laser is the scanning length of 78mm (X direction) and 18mm (Y direction), and the laser parameters are set as: laser scanning speed 40mm min -1 , the laser power is 130W, the pulse width is 2.5ms, the frequency is 10Hz, the number of scans is 1 to 3, and the laser sealing operation is performed on the glass and Kovar alloy at a distance of 1mm from the solder.

[0049] According to tests, the shear strength of the glass-Kovar alloy sealing body obtained by adopting the laser sealing method of this embodiment can reach 34 MPa.

Embodiment 3

[0051] The difference between this embodiment and Embodiment 1 is that the components of the solder used include 79% Ag, 20% Cu, and 1.0% Ti by mass fraction, the thickness of the solder is 45 μm, and the wavelength is 940 nm. The semiconductor laser, the processing trajectory set by the semiconductor laser is the scanning length of 78mm (X direction) and 18mm (Y direction), and the laser parameters are set as: laser scanning speed 160mm min -1 , the laser power is 160W, the pulse width is 1.8ms, the frequency is 8Hz, the number of scans is 1 to 3, and the laser sealing operation is performed on the glass and Kovar alloy at a distance of 3mm from the solder.

[0052] According to tests, the shear strength of the glass-Kovar alloy sealing body obtained by adopting the laser sealing method of this embodiment can reach 41 MPa.

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Abstract

The invention relates to a laser sealing method of glass and a kovar alloy. The method comprises the following steps: S1, setting a processing track according to dimension and shape of glass and kovar alloy needed to be sealed, and preparing a welding clamp; S2, performing a pre-stage sealing purifying pre-treatment operation on the glass and kovar alloy and providing Ag-Cu-Ti power or an Ag-Cu-Ti foil as welding flux; S3, uniformly spraying the welding flux in the S2 to the peripheral edges of the kovar alloy to be sealed, and placing the to-be-sealed glass on the kovar alloy; S4, clamping the to-be-sealed body by the welding clamp as required; S5, setting laser processing parameters, wherein a laser performs laser irradiation on the welding flux at the boundary of the glass and the kovar alloy according to the set processing track to prepare a glass-kovar alloy sealing body; and S6, disassembling the welding clamp. The method provided by the invention fully solves the problem that the connecting strength between the glass the kovar alloy is not high, and meanwhile, the sealing body which is high in connecting strength is prepared.

Description

technical field [0001] The invention relates to the technical field of sealing of heterogeneous materials, in particular to a laser sealing method of glass and Kovar alloy, and a sealing body prepared by the method. Background technique [0002] Insulating glass is composed of two or more layers of flat glass. The edges are sealed with composite adhesive strips, or the edges are sealed with aluminum butyl glue and polysulfide glue, and two or more pieces of glass are bonded to sealing strips and glass strips. , sealed, and filled with dry static gas in the middle to ensure the dryness of the air between the glass sheets. When the spacer is a gas, the gas may be air, an inert gas, or the like. Insulating glass is widely used because of its thermal insulation and sound insulation. [0003] Based on the structure of the above insulating glass, glass can also be combined with Kovar alloy to form a glass-Kvar metal seal. Kovar alloy, also known as iron-nickel-cobalt alloy, has...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C27/04B23K26/21B23K26/402B23K26/60B23K26/70
CPCB23K26/21B23K26/402B23K26/60B23K26/70C03C27/048
Inventor 王晓南陈夏明陈长军张敏邱兆岭胡增荣
Owner SUZHOU UNIV
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