Application of cesium-tungsten bronze as welding flux for welding sapphire

A cesium tungsten bronze, a technology using cesium tungsten bronze, applied in welding equipment, welding medium, welding equipment, etc., can solve the problems of large stress in welding structure, large difference in thermal expansion coefficient, and decrease in bending strength of joints

Active Publication Date: 2021-06-15
CHANGZHOU VOCATIONAL INST OF ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if metal solder is used, the weld will be opaque, and due to the large difference in thermal expansion coefficient between the metal and sapphire, a large stress will be generated inside the welded structure, which will reduce the bending strength of the weld and even cause cracks
If glass solder is used, the bending strength of the joint will decrease,

Method used

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  • Application of cesium-tungsten bronze as welding flux for welding sapphire

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0045] Example 1

[0046] (1) Surface polishing treatment of the cropped sapphire wafer, so that the sapphire surface roughness RA is 3.000 nm.

[0047] (2) 55 wt% of chemical formula is CS 0.7 WO 3 The rhenthem tungsten bronze is mixed with 45 wt% ethanol to obtain a ruthenium tricycle.

[0048] (3) Apply the squid tungsten bronze slurry to the surface of sapphire to weld the surface, and the two sapphire is placed on the weld surface, and the pressure is applied, so that the medium of the cesium tungsten bronze in the weld is 30 μm;

[0049] (4) Using a molybdenum clamp, the blue weather is applied, and the pressure of 20N is applied to the solder, the heater is placed at a temperature of 800 ° C, and the temperature is 1050 nm at a rate of 5 ° C / min, and the laser spot has a diameter of 2 mm, and the power is 5000W. The infrared laser is irradiated at one side sapphire to the weld, and the irradiation time is 5s, and then the power of the infrared laser irradiation is lowered...

Example Embodiment

[0052] Example 2

[0053] (1) Surface polishing treatment of the cropped sapphire wafer, so that the sapphire surface roughness Ra is 4.000 nm.

[0054] (2) Chemical formula of 97 wt% is CS 0.8 WO 3 铯 Tungsten bronze mixed with 3 wt% ethanol to give rhentheal bronze slurry;

[0055] (3) Apply the squid tungsten bronze slurry to the surface of sapphire to weld the surface, and the two sapphire is placed on the weld surface, and the pressure is applied, so that the medium of the insecticate bronze in the weld is 80 μm;

[0056] (4) Using a molybdenum clamp, a sapphire is applied, and the pressure is applied to the solder blue west, and the heating target temperature is 1200 ° C, which is 1050 nm at 10 ° C / min, using a wavelength of 1050 nm, and the laser spot has a diameter of 10 mm. The power is 8000W. The infrared laser is irradiated through the sapphire, and the irradiation time is 30s, and then the power of the infrared laser irradiation is reduced by 200 W / s speed until the...

Example Embodiment

[0059] Example 3

[0060] (1) Surface polishing treatment of the cropped sapphire wafer, so that the surface roughness Ra of sapphire is 5.000 nm.

[0061] (2) Chemical formula of 97 wt% is CS 0.8 WO 3 铯 Tungsten bronze mixed with 3 wt% ethanol to give rhentheal bronze slurry;

[0062] (3) Apply the rhythm tungsten bronze slurry to the surface of sapphire to weld the surface, and the two sapphire is placed to be soldered, and the pressure is applied, so that the tungsten bronze thickness of the weld is 70 μm;

[0063] (4) Using a molybdenum clamp, the bluemeal is applied, and the pressure of the soldering blue should be applied to the pressure of 300N, and the heater heating target temperature is 700 ° C, which is 1050 nm at 8 ° C / min, using a wavelength of 1050 nm, and the laser spot has a diameter of 3 mm, and the power is 4000W. The infrared laser is irradiated through the sapphire, and the irradiation time is 20s, and then the power of the infrared laser irradiation is lower...

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Abstract

The invention provides an application of cesium-tungsten bronze as a welding flux for welding sapphire, and belongs to the technical field of sapphire welding. According to the invention, the cesium-tungsten bronze is filled in a sapphire welding seam, so that the absorption efficiency of the welding seam on laser energy can be increased, then local heating for the sapphire welding seam is realized, and then welding for the sapphire is completed; and meanwhile, the sapphire is also an oxide and can be mutually dissolved with the cesium-tungsten bronze to a certain extent, in an infrared laser transillumination welding process, the sapphire at a welding seam joint is melted, the cesium-tungsten bronze is dissolved into the sapphire, so that the spatial distribution density of the sapphire is reduced, the light energy absorption energy density of the welding seam is reduced until the absorbed light energy is not enough to keep the sapphire in the volume of the welding seam in a molten state, the sapphire welding seam is solidified, and the welding process is completed.

Description

technical field [0001] The invention relates to the technical field of sapphire welding, in particular to the application of cesium tungsten bronze as solder for welding sapphire. Background technique [0002] Sapphire is mainly composed of α-Al 2 o 3 It has the advantages of high hardness, high melting and boiling point, and high wear resistance. At the same time, due to its good light transmission and low scattering rate of transmitted light, it has been widely used in medical equipment, aerospace, military industry and other fields, such as for making observation windows of aviation equipment. At the same time, the demand for large-size sapphire wafers with a length and width of more than 300 mm is increasing day by day in related fields. At present, the maximum diameter of sapphire wafer products after manual slicing is about 300mm, and the square window is processed into a square window with a side length of only about 200mm, which cannot meet the size requirements o...

Claims

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Application Information

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IPC IPC(8): B23K35/24B23K26/21B23K26/324
CPCB23K35/24B23K26/21B23K26/324
Inventor 李书齐崔炜赵汉宇殷文建蒋伟成
Owner CHANGZHOU VOCATIONAL INST OF ENG
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