Polishing solution used for KDP crystal

A polishing liquid and crystal technology, which is applied in the cross-application field, can solve the problems of not taking into account the control of the interaction strength of water and KDP, the occurrence of corrosion pits at the polishing site, and the severe deliquescence, and achieve stable properties, simple preparation, and deliquescence. little effect

Inactive Publication Date: 2017-03-22
INST OF MACHINERY MFG TECH CHINA ACAD OF ENG PHYSICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The polishing fluid reduces the deliquescent effect to the nanometer level, but does not take into account the control of the strength of the interaction between water and KDP
Due to the high solubility of KDP in water, the deliquescent effect between water and KDP in the deliquescent micro-zone will be very violent and uncontrollable during polishing, and it is easy to produce corrosion pits at the polishing site

Method used

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  • Polishing solution used for KDP crystal
  • Polishing solution used for KDP crystal

Examples

Experimental program
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Effect test

preparation example Construction

[0027] The environment temperature for the preparation of the microemulsion is 20°C-25°C, the relative humidity is 40%-50%, and the air pressure is normal pressure.

[0028] The preparation of polishing fluid, with the quasi-three-dimensional phase diagram of oil, surfactant and a certain concentration of KDP aqueous solution as a technical means, by drawing the phase diagram, the single-phase region of the inverse microemulsion of KDP aqueous solution in oil is obtained; according to the same method , draw the phase diagrams of the corresponding systems of various concentrations of KDP aqueous solutions, and obtain a series of single-phase microemulsion regions. Microemulsions with different ratios or different systems were selected as polishing fluids, and the deliquescent polishing of KDP crystals was achieved by using a rotary gravity polishing machine.

Embodiment 1

[0030] (1) Obtaining the initial surface: a 35 mm×35 mm KDP crystal cut by single-point diamond flying is used as the crystal to be polished;

[0031] (2) Preparation of polishing fluid—functionalized microemulsion: first, draw the quasi-ternary phase diagram of decanol / Triton-100 / 10 mM KDP aqueous solution by conductivity method, and determine the inverse microemulsion of the quasi-ternary system Single-phase region, in which Polishing Solution A (55% decanol, 40% polyethylene glycol octylphenyl ether (Triton-100) and 5% 10 mM KDP aqueous solution) was selected.

[0032] (3) Polishing experiment—release of microemulsion function: a rotary gravity polishing machine was used, the dropping speed of polishing solution A was 15 ml / min, the load during polishing was 260 g, the rotation speed of the main disc was 60 rpm, and the rotation speed of the holding ring was 30 rpm , Polishing time 35min.

[0033] (4) Cleaning after polishing: use isopropanol, n-hexane, and acetic acid as ...

Embodiment 2-7

[0036] The embodiment of this embodiment is basically the same as that of Example 1, the main difference is that a series of polishing liquids with different proportions are selected in the single-phase microemulsion zone of decyl alcohol / Triton-100 / 10 mMKDP aqueous solution, during the polishing process , the dropping speed, polishing pressure, rotating speed of the main plate, and rotating speed of the holding ring of each polishing liquid remain unchanged, and the polishing time is slightly adjusted according to the difference in the removal rate. The specific experimental conditions and results are summarized in the table below.

[0037] The polishing liquid embodiment of other proportioning in the decyl alcohol / Triton / 10 mM KDP aqueous system

[0038]

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Abstract

The invention provides a polishing solution used for monopotassium phosphate (KDP) crystal. The polishing solution is composed of an oil phase, a surface active agent and a KDP aqueous solution, and is a special water-in-oil microemulsion. Under the role of the surface active agent, the KDP aqueous solution with certain concentration is dispersed as a dispersion phase into the oil phase in a nanoscale liquid drop form. In the polishing process, due to extrusion force and friction stress, the KDP aqueous solution liquid drop breaks through an interfacial film composed of the surface active agent and molecules of the oil phase, reaches the surface of the KDP crystal, and generates a slow-release deliquescence effect with an embossment part on the surface of the KDP crystal; by changing the concentration of the KDP aqueous solution to conduct adjustment and control on the deliquesce effect, finally removal of precision parts on the surface of the KDP crystal is achieved; no new substances generate in the polishing process and external residues are organic matters, surface cleaning can be achieved through the cleaning with a matched organic solvent, and secondary damages are not caused. A preparing method of the polishing solution is simple, the property of the polishing solution is stable, and the polishing solution can effectively weaken flying cut knife grain, reduce surface roughness, and provide favorable technological supports for creating super smooth and clean KDP surface.

Description

technical field [0001] The invention belongs to the cross-application field of ultra-precision machining and synthesis of functionalized microemulsions, and in particular relates to a polishing liquid for KDP crystals. Background technique [0002] Potassium dihydrogen phosphate crystal is a very good optical crystal developed in the 1940s. It is currently the only nonlinear optical material that can be used for laser frequency doubling, electro-optic modulation and photoelectric switching devices in optical systems such as ICF and strong laser weapons. . In engineering applications, the surface quality requirements of KDP crystals are extremely high, such as ultra-smoothness, no surface defects, no stress residues, and no impurity residues, which are close to the limit of material processing. However, the KDP crystal material itself has the characteristics of soft and brittle, easy to deliquescence, sensitive to temperature changes, and anisotropy, and is recognized as one...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09G1/04
CPCC09G1/04
Inventor 董会王利利潘金龙高伟李晓媛王超黄姝珂吉方王宝瑞
Owner INST OF MACHINERY MFG TECH CHINA ACAD OF ENG PHYSICS
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