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Sapphire splicing method, sapphire window and paste size

A technology of sapphire and pasting paste, which is applied in the field of sapphire window and pasting paste, sapphire splicing, which can solve the problems of high cost, failure to meet aperture requirements, and long acquisition cycle, and achieve the effect of reducing connection costs

Inactive Publication Date: 2013-05-15
无锡鼎晶光电科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the size of the existing sapphire wafers and crystal blocks used in optical windows is far from meeting the aperture requirements of many modern optical systems due to the size limitation of artificially grown sapphire crystals; this requires pasting different sapphires to achieve the required size. Require
[0003] The cost of traditional adhesives is low, but they cannot withstand high temperature and high pressure, and cannot be applied to the paste between sapphires; while various adhesive-free paste technologies developed internationally, such as the direct connection of laser crystals without adhesives Although the technology has obtained a certain strength, the cost is high and the acquisition period is long; another example is to deposit the niobium interlayer on the sapphire crystal surface to be connected by electron beam, and carry out the process at a relatively low temperature (900 degrees). Nb / Al 2 o 3 Although the diffusion connection has obtained higher strength, the experimental research method regardless of the cost and the implementation environment cannot be applied to the industrial production in pursuit of cost control and profit; Although it has high connection strength, the process is completed at room temperature and high vacuum, and the conditions are harsh, so it is not suitable for industrial production

Method used

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  • Sapphire splicing method, sapphire window and paste size
  • Sapphire splicing method, sapphire window and paste size

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] In this embodiment, two connection processes of glass brazing method and reaction sintering method are used to design the solder system and connection process, screen out the appropriate solder system, and obtain the best solder composition and connection process parameters; four-point bending Strength test the mechanical properties of sapphire crystal connection joints, analyze its influencing factors, and obtain the best process parameters; use various analysis and testing methods (SEM, EDS, etc.) to observe and analyze the microscopic morphology of sapphire crystal connection joints and the distribution of elements in the joints Based on the analysis of the connection mechanism, optimize the design of the interlayer system and connection process to improve the connection performance.

[0047] Based on the above tests and analysis, the inventor provides a low-cost sapphire crystal splicing method:

[0048] 1. Cut the artificial sapphire crystal into the corresponding ...

Embodiment 2

[0056] Such as figure 2 As shown, the present embodiment discloses a sapphire splicing method, comprising steps:

[0057] a. Cut the sapphire crystals into corresponding sizes, and the joint surfaces of the sapphire crystals to be spliced ​​are of the same size and parallel to each other;

[0058] b. Grinding the joint surface of sapphire, and then polishing to the required surface finish;

[0059] c. Clean the sapphire with acetone and perform ultrasonic vibration;

[0060] d. Apply paste paste on the joint surface of two sapphire crystals, and use ethanol to dissolve Al 2 o 3 , SiO 2 The mixed powder with MgO is adjusted to paste slurry; Al 2 o 3 , SiO 2 The weight ratio with MgO is 7:2:1;

[0061] e. Butt assembly of two sapphire crystals;

[0062] f. Place it vertically in the fixture;

[0063] g. Apply pressure to the sapphire crystal in the vertical direction to complete the splicing and fixing of the two sapphire crystals;

[0064] h. Put the spliced ​​sapph...

Embodiment 3

[0067] This embodiment discloses a kind of pasting slurry, and the pasting slurry is mixed with organic solvents such as ethanol and Al 2 o 3 , SiO 2 Composed of MgO, this paste paste can be used for splicing and fixing between sapphires.

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Abstract

The invention discloses a sapphire splicing method, a sapphire window and a paste size. A sapphire splicing method comprises steps of: A, smearing the paste size on a combination surface of two pieces of sapphire crystal, wherein the paste size is formed by organic solvent mixed with a powder solder; B, splicing and fixing the two pieces of sapphire crystal; and C, pressurizing the spliced sapphire crystal in a vacuum furnace. The invention can effectively solve the problem that sapphire crystal plate and sapphire crystal block used in an optical window are limited by specifications of artificially grown sapphire crystal and fail to have size to satisfy the aperture requirements of many modern optical systems, in order to achieve the requirements; in addition, the invention employs mature technologies with relatively low cost in industrial practice, and produces sapphire window with large area from billet grown in small melt, so as to greatly reduce the cost of splicing.

Description

technical field [0001] The invention relates to the field of gemstone processing, and more specifically relates to a sapphire splicing method, a sapphire window and paste paste. Background technique [0002] Sapphire has high strength, high hardness, high temperature resistance, corrosion resistance, good wear resistance, small friction coefficient, high resistivity, and also has good thermal conductivity and electrical insulation. The most important thing is that sapphire has good performance in visible and MWIR bands. It is considered to be an ideal material for infrared military equipment and satellite optical windows. However, the size of the existing sapphire wafers and crystal blocks used in optical windows is far from meeting the aperture requirements of many modern optical systems due to the size limitation of artificially grown sapphire crystals; this requires pasting different sapphires to achieve the required size. Require. [0003] The cost of traditional adhes...

Claims

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Application Information

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IPC IPC(8): C30B33/06
Inventor 张向峰
Owner 无锡鼎晶光电科技有限公司
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