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A kind of diffusion welding device for large-size sapphire light window and welding method thereof

A technology of diffusion welding and welding method, which is applied in the direction of welding/welding/cutting items, welding equipment, non-electric welding equipment, etc. It can solve the problems that sapphire materials cannot be used and angled welding cannot be solved, so as to prevent pressure slippage, Guarantee the effect of quality and uniform temperature distribution

Active Publication Date: 2022-08-02
江苏振华新云电子有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] There are also some scientific research institutes in China that weld sapphire plates with a thickness of 3mm-10mm and a width of no more than 100mm. However, the welding method mostly adopts the method of horizontally fixing both ends and pressurizing, which cannot meet the needs of angled welding.
Although there are also patents (201510956722.9) that use special welding materials to reduce the welding temperature to ensure the welding strength and reduce the difficulty of the welding process, but this does not fundamentally solve the practical application. The paradox of using sapphire

Method used

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  • A kind of diffusion welding device for large-size sapphire light window and welding method thereof
  • A kind of diffusion welding device for large-size sapphire light window and welding method thereof
  • A kind of diffusion welding device for large-size sapphire light window and welding method thereof

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Embodiment

[0038] This embodiment is used for the diffusion welding device of the large-size sapphire light window, such as figure 1 As shown, the large-size sapphire light window is formed by two large-size sapphire plates 3 through diffusion welding to form a bending structure, and the bending angle of the bending structure is 120°; the diffusion welding device includes a tungsten heating element 4 with a bending structure , the center of the tungsten heating element 4 is provided with an embedded groove 41 which is matched with a large-size sapphire light window; a ZrO2 insulating material layer 2, the ZrO2 insulating material layer covers the outer surface of the tungsten heating element 4, and the ZrO2 insulating material layer 2 The geometric symmetry center of ZrO2 coincides with the geometric symmetry center of the tungsten heating element 4; in addition, the side wall of the ZrO2 insulation material layer 2 is provided with a connecting hole, and the two ends of the ZrO2 insulati...

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Abstract

The invention relates to a diffusion welding device for a large-size sapphire light window and a welding method thereof. The diffusion welding device comprises a refractory metal heating element, a thermal insulation material layer, an induction coil and an air intake pipe, and also includes a pair of fixing components, It is used to fix the sapphire plate to be welded, and can apply pressure to both ends of the sapphire plate evenly; during diffusion welding, the oxygen with a volume ratio of 1:1000 is introduced through the air inlet pipe 2 and Ar mixed gas. The advantages of the present invention are: the diffusion welding device and welding method for large-size sapphire optical windows can realize diffusion welding of sapphire plates with angles, and the overall stress of the welded product is low, and the damage of the sapphire surface during welding is reduced by using the atmosphere.

Description

technical field [0001] The invention belongs to the technical field of crystal growth, and relates to a welding device for a sapphire optical window, in particular to a diffusion welding device for a large-size sapphire optical window with a bending angle in space, and a method for welding a sapphire plate with the diffusion welding device . Background technique [0002] The composition of sapphire is aluminum oxide (Al2O3), which is composed of three oxygen atoms and two aluminum atoms combined in a covalent bond type, and its crystal structure is a hexagonal lattice structure. Because sapphire has the characteristics of high Mach airflow resistance, high temperature resistance, corrosion resistance, high hardness, high light transmittance, high melting point (2045°C), etc., especially the transmittance in the mid-wave infrared band is as high as 80%, so it is used for conditions Harsh infrared imaging window glass. Common occasions where sapphire is used as infrared imag...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K20/02B23K20/22
CPCB23K20/002B23K20/023B23K20/22B23K2103/50
Inventor 马远吴勇周健杰
Owner 江苏振华新云电子有限公司
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