Composition for polishing optical fiber image-transmitting composite glass and polishing method

Abstract

The invention relates to a composition for polishing optical fiber image-transmitting composite glass and a polishing method. The composition comprises the following substances in percentage by mass: 10-25% of rare earth oxide; the content of the ultrapure water is 72%-88%; the content of the additive is 0.5%-4%. The polishing method comprises the following steps that a polishing medium solution is prepared, specifically, an additive is added into ultrapure water, ultrasonic stirring is conducted for the first time till the additive is completely dissolved, then rare earth oxide is added, ultrasonic stirring is conducted for the second time, and the polishing medium solution is obtained after the rare earth oxide is evenly dispersed; and polishing treatment: carrying out surface polishing treatment on the optical fiber image-transmitting composite glass by using a polishing medium solution. When the composition is used for polishing the optical fiber image-transmitting composite glass, the surface quality of the optical fiber image-transmitting composite glass is improved, the problem that pits are generated on the surface of the optical fiber image-transmitting composite glass is avoided, and the composition has the advantages of improving the polishing efficiency and the polishing effect.

Description

Technical Field

[0001] The present invention relates to the technical field of composite glass processing, and particularly relates to a composition and a polishing method for polishing fiber-optic image transmission composite glass. Background Art

[0002] The fiber-optic image transmission composite glass includes an optical fiber faceplate, an optical fiber image inverter, an optical fiber light cone, and a fiber-optic image bundle, etc. It is an optoelectronic imaging element with excellent performance, having the characteristics of simple structure, small volume, light weight, high resolution, large numerical aperture, small inter-stage coupling loss, clear and true image transmission, high light transmission efficiency, having an optical zero thickness in image transmission, and being able to improve the edge image quality, etc.

[0003] The fiber-optic image transmission composite glass is an optical element formed by the regular arrangement of millions of micron-scale optical fibers. The optical fibers in the fiber-optic image transmission composite glass are composed of a core layer with a high refractive index and a cladding layer with a low refractive index. Input light rays that meet the total reflection condition can be transmitted from one end to the other end inside the optical fiber, while input light rays that do not meet the total reflection condition penetrate the cladding layer to become stray light. Stray light is the most important factor causing poor imaging clarity of the fiber-optic image transmission composite glass. To solve the above problems, usually, the method of partially filling the gaps between adjacent optical fibers with light-absorbing glass is used to absorb stray light, and the remaining gaps are filled with spacer wires to ensure the structural stability of the fiber-optic image transmission plate segment obtained by plate arrangement during the hot pressing process. Due to the special arrangement structure of the fiber-optic image transmission composite glass and the different corrosion resistance and hardness of the core and cladding materials, regular pits will be generated during the polishing process, thereby affecting the transmittance of the fiber-optic image transmission composite glass.

[0004] Currently, there is no dedicated polishing method for polishing fiber-optic image transmission composite glass and the composition used in the polishing method. Summary of the Invention

[0005] The main purpose of the present invention is to provide a composition for polishing fiber-optic image transmission composite glass with high polishing efficiency and avoiding the generation of pits on the surface of the fiber-optic image transmission composite glass.

[0006] To achieve the above purpose, the technical solution adopted by the present invention is as follows:

[0007] A composition for polishing fiber-optic image transmission composite glass, comprising the following substances in mass percentage content: the content of rare earth oxide is 10 - 25%; the content of ultrapure water is 72% - 88%; the content of the additive is 0.5% - 4%.

[0008] The additive is selected from at least one of cetyltrimethylammonium bromide, sodium dodecyl sulfate, polyethylene glycol, and sodium polyacrylate.

[0009] The rare earth oxide is cerium dioxide or a mixture of cerium dioxide with lanthanum oxide, praseodymium oxide, and niobium oxide.

[0010] The particle size of the rare earth oxide is 0.3 μm - 1 μm.

[0011] The present invention also provides a method for polishing the surface of a fiber optic image transmission composite glass using the described composition, comprising the following steps:

[0012] Preparing a polishing medium solution: adding an additive to ultrapure water, ultrasonically stirring for the first time until completely dissolved, then adding the rare earth oxide, and ultrasonically stirring for the second time to uniformly disperse the rare earth oxide to obtain the polishing medium solution;

[0013] Polishing treatment: performing surface polishing treatment on the fiber optic image transmission composite glass with the polishing medium solution.

[0014] Before the polishing treatment, the fiber optic image transmission composite glass further includes: grinding the fiber optic image transmission composite glass, and then ultrasonically purifying it with deionized water for a first preset time.

[0015] During the polishing treatment, the applied pressure is 5 - 15 Kg, the rotation speed of the polishing shaft is 50 - 65 r / min, and the polishing time is 30 - 60 min.

[0016] The power of the ultrasonic stirring is 250 - 400 W, and the frequency of the ultrasonic stirring is 20 KHz - 80 KHz; the time of the first ultrasonic stirring is 0.5 h - 4 h; the time of the second ultrasonic stirring is 2 - 4 h; the first preset time is 10 - 30 min, and the grinding time is 10 - 15 min.

[0017] Further, it further includes a cleaning treatment:

[0018] Cleaning the fiber optic image transmission composite glass after the polishing treatment with a cleaning solution; the cleaning solution is a mixture of deionized water, PGX - 01, and potassium hydroxide. In the cleaning solution, the concentration of PGX - 01 is 3% - 5%, and the pH of the cleaning solution is adjusted to 8 - 9 with a potassium hydroxide solution having a concentration of 0.3 - 0.7 mol / L. The temperature of the cleaning treatment is between 40°C and 45°C.

[0019] The fiber optic image transmission composite glass includes a core glass and a cortical glass;

[0020] The core glass has a refractive index of 1.75 - 1.80, and the Mohs hardness of the core glass is 5.6 - 5.8;

[0021] The cortical glass has a refractive index of 1.48 - 1.54, and the Mohs hardness of the cortical glass is 5.4 - 5.5.

[0022] The core glass is composed of the following components in mole percentage:

[0023] SiO2 20 - 25%, B2O3 20 - 32%, CaO 0.5 - 5%, Al2O3 1 - 5%, SrO 1 - 5%, BaO 0 - 10%, TiO2 10 - 15%, La2O3 5 - 15%, Gd2O3 7 - 10%, Nb2O5 1 - 5%, ZrO2 3 - 5%;

[0024] The cladding glass is composed of the following components in mole percentage: SiO2 60 - 73%, B2O3 5 - 10%, BaO 0 - 5%, CaO 1 - 5%, Al2O3 0 - 6%, MgO 5 - 10%, Na2O 0.5 - 3%, K2O 5 - 28%, Li2O 0 - 2%.

[0025] In the additive of the present invention:

[0026] Cetyltrimethylammonium bromide is a quaternary ammonium salt type cationic surfactant, which can be used as a surfactant or emulsifier, and has excellent properties such as penetration, emulsification, antistatic and biodegradability. It can significantly improve the quality and efficiency of polishing during the polishing process.

[0027] Sodium dodecyl sulfate is an anionic surfactant, which has good wetting, emulsifying, detergency and foaming properties. During the polishing process, as an additive, sodium dodecyl sulfate can reduce the tension at the two - phase interface, promote the contact between the polishing medium and the surface of the fiber - optic image - transmitting composite glass, and improve the polishing effect.

[0028] Polyethylene glycol is a high - molecular polymer with a low melting point and is easily soluble in water. As an additive to the polishing medium, it can improve the fluidity of the polishing liquid and reduce the friction force, making the polishing process smoother and the surface of the material to be polished smoother.

[0029] Sodium polyacrylate is a high - molecular compound with properties such as water absorption and dispersibility. Sodium polyacrylate plays a role in dispersing and suspending particles in the polishing liquid, and can increase the viscosity of the polishing liquid, making the polishing liquid form a more stable abrasive liquid system, which helps to improve the polishing effect, make the surface of the fiber - optic image - transmitting composite glass after polishing smoother and have a higher gloss. During the polishing process, the addition of sodium polyacrylate not only helps in physically removing materials and surface lubrication, but also has a positive impact on the polishing process through its chemical properties.

[0030] By means of the above - mentioned technical solution, the present invention has at least the following advantages:

[0031] Using the composition of the present invention to polish the fiber optic image transmission composite glass improves the surface quality of the fiber optic image transmission composite glass, avoids the problem of pits on the surface of the fiber optic image transmission composite glass, and has the advantages of improving the polishing efficiency and polishing effect.

[0032] The above description is only an overview of the technical solution of the present invention. In order to be able to more clearly understand the technical means of the present invention and to be implemented in accordance with the content of the specification, the following describes in detail with preferred embodiments of the present invention as follows. Detailed implementation manners

[0033] To further elaborate on the technical means and effects adopted by the present invention to achieve the intended invention purpose, the following combines preferred embodiments to detail the specific implementation manners, structures, features and their effects of the present invention as follows. In the following description, different "one embodiment" or "embodiment" do not necessarily refer to the same embodiment. In addition, the specific features, structures, or characteristics in one or more embodiments can be combined in any suitable form.

[0034] Embodiment 1:

[0035] 1) Prepare 500 mL of ultrapure water, weigh 4.803 g of cetyltrimethylammonium bromide and add it to the ultrapure water. Stir ultrasonically at a frequency of 40 KHZ and a power of 250 W for 2 h until completely dissolved to obtain a solution. Then weigh 80.039 g of rare earth oxides. The rare earth oxides are 78.669 g of cerium dioxide, 0.13 g of lanthanum oxide, 0.4 g of praseodymium oxide and 0.84 g of niobium oxide. Among them, the particle size of the rare earth oxides is 0.3 μm. Disperse the rare earth oxides in the above solution and stir ultrasonically at a frequency of 40 KHZ and a power of 250 W for 2 h to make the polishing medium evenly dispersed, obtaining a polishing medium solution with a rare earth oxide content of 13.69%; an ultrapure water content of 85.49%; and an additive content of 0.82%;

[0036] 2) Use deionized water to ultrasonically purify the fiber optic image transmission composite glass polished with W28 emery for 10 min at a frequency of 40 KHZ and a power of 250 W for 10 min;

[0037] 3) Use the polishing medium solution prepared in 1) to polish the fiber optic image transmission composite glass treated in 2). The pressure applied during polishing is 8 Kg, the main shaft rotation speed during polishing is 52 r / min, the swing shaft rotation speed is 60 r / min. After polishing for 45 min, clean the fiber optic image transmission composite glass with a cleaning solution. The cleaning solution is a mixture of deionized water, PGX-01 and potassium hydroxide. In the cleaning solution, the mass concentration of PGX-01 is 5%, and the pH of the cleaning solution is adjusted to 8 with a 0.3 mol / L potassium hydroxide solution. The cleaning temperature is 45 °C;

[0038] The fiber-optic image transmission composite glass includes a core glass and a cortical glass;

[0039] The core glass has a refractive index of 1.75 and a Mohs hardness of 5.6;

[0040] The core glass is composed of the following components in mole percentage:

[0041] SiO2 20%, B2O3 30%, CaO 2.5%, Al2O3 3%, SrO 3%, BaO 7%, TiO2 12%, La2O3 11.5%, Gd2O3 7%, Nb2O5 1%, ZrO2 3%;

[0042] The cortical glass has a refractive index of 1.48 and a Mohs hardness of 5.4;

[0043] SiO2 60%, B2O3 5%, BaO 10%, CaO 5%, Al2O3 5%, MgO 9%, Na2O 0.5%, K2O 5%, Li2O 0.5%.

[0044] PGX-01 is an aqueous cleaning agent of PGX-01 purchased from Yunnan Optoelectronic Auxiliary Materials Company.

[0045] Example 2:

[0046] 1) Prepare 500 mL of ultrapure water, weigh 4.426 g of cetyltrimethylammonium bromide, 0.727 g of sodium dodecyl sulfate, and 5.605 g of polyethylene glycol and add them to the ultrapure water. Stir ultrasonically at a frequency of 20 KHZ and a power of 300 W for 4 h until completely dissolved to obtain a solution. Then weigh 129.066 g of rare earth oxides. The rare earth oxides are 126.226 g of cerium dioxide, 1.80 g of lanthanum oxide, 0.5 g of praseodymium oxide, and 0.54 g of niobium oxide. Among them, the particle size of the rare earth oxides is 1 μm. Disperse the rare earth oxides in the above solution and stir ultrasonically at a frequency of 80 KHZ and a power of 400 W for 2.5 h to make them evenly dispersed, obtaining a polishing medium solution with a rare earth oxide content of 20.17%; an ultrapure water content of 78.15%; and an additive content of 0.69% of cetyltrimethylammonium bromide, 0.11% of sodium dodecyl sulfate, and 0.88% of polyethylene glycol;

[0047] 2) Ultrasonically purify the ground fiber-optic image transmission composite glass with deionized water at a frequency of 20 KHZ and a power of 300 W for 12 min;

[0048] 3) Polish the fiber-optic image transmission composite glass treated in 2) with the polishing medium solution prepared in 1). When polishing, the applied pressure is 5 Kg, the spindle speed is 50 r / min, and the pendulum shaft speed is 62 r / min. After polishing for 30 min, clean the fiber-optic image transmission composite glass with a cleaning solution, which is a mixture of deionized water, PGX-01, and potassium hydroxide. In the cleaning solution, the mass concentration of PGX-01 is 3%, and the pH of the cleaning solution is adjusted to 9 with a 0.7 mol / L potassium hydroxide solution. The cleaning temperature is 40 °C;

[0049] The fiber-optic image transmission composite glass includes core glass and cortical glass;

[0050] The core glass has a refractive index of 1.78, and the Mohs hardness of the core glass is 5.65;

[0051] The core glass is composed of the following components in mole percentage:

[0052] SiO2 25%, B2O3 25%, CaO 5%, Al2O3 5%, SrO 1%, BaO 2%, TiO2 10%, La2O3 13.5%, Gd2O3 8%, Nb2O5 2%, ZrO2 3.5%;

[0053] The cortical glass has a refractive index of 1.50, and the Mohs hardness of the cortical glass is 5.5.

[0054] The cortical glass is composed of the following components in mole percentage: SiO2 65%, B2O3 7%, Al2O3 3%, BaO 3%, CaO 3.5%, MgO 7%, Na2O 2%, K2O 8%, Li2O 1.5%.

[0055] Example 3:

[0056] 1) Prepare 500 mL of ultrapure water, weigh 4.001 g of sodium dodecyl sulfate and 5.601 g of sodium polyacrylate, add them to the ultrapure water, and stir ultrasonically at a frequency of 80 KHZ and a power of 300 W for 0.5 h until completely dissolved to obtain a solution. Then weigh 168.011 g of rare earth oxides, where the rare earth oxides are 163.471 g of cerium dioxide, 3.34 g of lanthanum oxide, 0.65 g of praseodymium oxide, and 0.55 g of niobium oxide. Among them, the particle size of the rare earth oxides is 0.5 μm. Disperse the rare earth oxides in the above solution and stir ultrasonically at a frequency of 60 KHZ and a power of 250 W for 3 h to make them evenly dispersed, obtaining a polishing medium solution with a rare earth oxide content of 24.80%; an ultrapure water content of 73.79%; and an additive content of 0.59% of sodium dodecyl sulfate and 0.82% of sodium polyacrylate;

[0057] 2) The ground fiber-optic image transmission composite glass is treated with deionized water by ultrasonic cleaning at a frequency of 80 KHZ and a power of 400 W for 10 min;

[0058] 3) The fiber-optic image transmission composite glass treated in 2) is polished with the polishing medium solution prepared in 1). When polishing, the applied pressure is 15 Kg, the spindle speed is 52 r / min, and the swing axis speed is 60 r / min. After polishing for 45 min, the fiber-optic image transmission composite glass is cleaned. The cleaning solution is a mixture of deionized water, PGX-01, and potassium hydroxide. In the cleaning solution, the mass concentration of PGX-01 is 4%, and the pH of the cleaning solution is adjusted to 8 with a 0.5 mol / L potassium hydroxide solution. The cleaning temperature is 43 °C;

[0059] The fiber-optic image transmission composite glass includes a core glass and a cortical glass;

[0060] The core glass has a refractive index of 1.79 and a Mohs hardness of 5.8;

[0061] The core glass is composed of the following components in mole percentage:

[0062] SiO2 22%, B2O3 28%, CaO 3%, Al2O3 2%, SrO 3.5%, BaO 5%, TiO2 12%, La2O3 10%, Gd2O3 8%, Nb2O5 3.5%, ZrO2 3%;

[0063] The cortical glass has a refractive index of 1.52 and a Mohs hardness of 5.4;

[0064] The cortical glass is composed of the following components in mole percentage: SiO2 70%, B2O3 5%, BaO2 2%, CaO 1%, Al2O3 4%, MgO 5%, Na2O 2%, K2O 10%, Li2O 1%.

[0065] Example 4:

[0066] 1) Prepare 500 mL of ultrapure water, weigh 4.802 g of sodium dodecyl sulfate and add it to the ultrapure water. Stir ultrasonically at a frequency of 30 KHZ and a power of 400 W for 1 h until completely dissolved to obtain a solution. Then weigh 140.031 g of cerium dioxide polishing medium, where the particle size of cerium dioxide is 0.8 μm. Disperse the cerium dioxide in the above solution and stir ultrasonically at a frequency of 70 KHZ and a power of 350 W for 4 h to make it evenly dispersed, obtaining a polishing medium solution with a polishing medium content of 21.72%; an ultrapure water content of 77.54%; and an additive content of sodium dodecyl sulfate of 0.74%;

[0067] 2) The ground fiber-optic image transmission composite glass is ultrasonically cleaned with deionized water at a frequency of 60 KHZ, a power of 350 W for 15 minutes.

[0068] 3) The fiber-optic image transmission composite glass treated in 2) is polished using the polishing medium solution prepared in 1). When polishing, the applied pressure is 10 Kg, the spindle speed is 52 r / min, and the swing axis speed is 64 r / min. After 60 minutes of polishing, the fiber-optic image transmission composite glass is cleaned with a cleaning solution, which is a mixture of deionized water, PGX-01, and potassium hydroxide. In the cleaning solution, the mass concentration of PGX-01 is 4%, and the pH of the cleaning solution is adjusted to 9 with a 0.5 mol / L potassium hydroxide solution. The cleaning temperature is 45°C.

[0069] The fiber-optic image transmission composite glass includes a core glass and a cortical glass.

[0070] The core glass has a refractive index of 1.80 and a Mohs hardness of 5.7.

[0071] The core glass is composed of the following components in mole percentage:

[0072] SiO2 23.5%, B2O3 20%, CaO 0.5%, Al2O3 1%, SrO 5%, BaO 10%, TiO2 15%, La2O3 5%, Gd2O3 10%, Nb2O5 5%, ZrO2 5%.

[0073] The cortical glass has a refractive index of 1.54 and a Mohs hardness of 5.5.

[0074] The cortical glass is composed of the following components in mole percentage: SiO2 66%, B2O3 10%, BaO 1%, CaO 2%, Al2O3 1%, MgO 5%, Na2O 3%, K2O 10%, Li2O 2%.

[0075] The polishing method of the present invention can also be used to polish fiber-optic image transmission composite glass with other component contents, that is, the polishing method of the present invention is applicable to fiber-optic image transmission elements prepared from different material components. When polishing the fiber-optic image transmission composite glass with the components defined in the present invention, the surface shape accuracy of the polished fiber-optic image transmission element is better.

[0076]

[0077]

[0078] Among them, wave represents the data tested by the device.

[0079] As can be seen from Table 1, among the four embodiments of the invention, the polishing method and composition of Embodiment 3 have the best polishing effect on the fiber optic image transmission element. The pit depth is reduced to 4.91 μm, and the surface form accuracy of the polished fiber optic image transmission element is good. The content of the polishing medium in Embodiment 3 is the highest. Generally, the higher the content, although the polishing efficiency will be high, the polishing liquid is prone to form clusters and settle. Therefore, the added additives sodium dodecyl sulfate and sodium polyacrylate play a very good dispersing role, making the polishing solution form a more stable abrasive liquid system. And by adding sodium polyacrylate, its chemical properties have a positive impact on the polishing process. The carboxylic acid group of sodium polyacrylate has pH responsiveness, completely dissociating (–COO-) in an alkaline environment and being partially protonated (–COOH) in an acidic environment, thereby regulating the pH stability of the polishing liquid and the surface potential of the particles, resulting in a reduction in the pit depth on the surface of the fiber optic element.

[0080] The above are only the preferred embodiments of the present invention and do not impose any form of limitation on the present invention. Although the present invention has been disclosed above with the preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications to equivalent embodiments by using the disclosed technical content within the scope of the technical solution of the present invention. However, as long as it does not depart from the content of the technical solution of the present invention, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A composition for polishing fiber optic image transmission composite glass, characterized in that, It includes substances with the following mass percentages: the content of rare earth oxide is 10 - 25%; the content of ultrapure water is 72% - 88%; the content of additive is 0.5% - 4%.

2. The composition according to claim 1, wherein The additive is selected from at least one of cetyltrimethylammonium bromide, sodium dodecyl sulfate, polyethylene glycol, and sodium polyacrylate.

3. The composition according to claim 1 or 2, characterized in that, The rare earth oxide is cerium dioxide or a mixture of cerium dioxide with lanthanum oxide, praseodymium oxide, and niobium oxide.

4. The composition according to claim 3, wherein The particle size of the rare earth oxide is 0.3μm - 1μm.

5. A method for polishing the surface of an optical fiber image transmission composite glass using the composition according to any one of claims 1-4, characterized in that, It includes the following steps: Prepare the polishing medium solution: Add the additive to ultrapure water, stir ultrasonically for the first time until completely dissolved, then add the rare earth oxide, and stir ultrasonically for the second time to make the rare earth oxide evenly dispersed to obtain the polishing medium solution. Polishing treatment: Use the polishing medium solution to perform surface polishing treatment on the fiber optic image transmission composite glass.

6. The method according to claim 5, wherein Before the polishing treatment, the fiber optic image transmission composite glass further includes: grinding the fiber optic image transmission composite glass, and then performing ultrasonic purification treatment with deionized water for a first preset time.

7. The method according to claim 6, wherein During the polishing treatment, the applied pressure is 5 - 15 Kg, the rotation speed of the polishing shaft is 50 - 65 r / min, and the polishing time is 30 - 60 min.

8. The method according to any one of claims 5 to 7, characterized in that The power of the ultrasonic stirring is 250 - 400 W, the frequency of the ultrasonic stirring is 20 KHZ - 80 KHZ; the time of the first ultrasonic stirring is 0.5 h - 4 h; the time of the second ultrasonic stirring is 2 - 4 h; the first preset time is 10 - 30 min, and the grinding time is 10 - 15 min.

9. The method according to claim 8, characterized in that It also includes a cleaning treatment: Clean the polished fiber optic image transmission composite glass with a cleaning solution; the cleaning solution is a mixture of deionized water, PGX - 01, and potassium hydroxide. In the cleaning solution, the concentration of PGX - 01 is 3% - 5%, and the pH of the cleaning solution is adjusted to 8 - 9 with a potassium hydroxide solution with a concentration of 0.3 - 0.7 mol / L. The temperature of the cleaning treatment is between 40°C and 45°C.

10. The method according to claim 9, wherein The fiber optic image transmission composite glass includes a core glass and a cortical glass. The core glass has a refractive index of 1.75 - 1.80, and the Mohs hardness of the core glass is 5.6 - 5.

8. The core glass consists of components with the following molar percentages as follows: SiO2 20 - 25%, B2O3 20 - 32%, CaO 0.5 - 5%, Al2O3 1 - 5%, SrO 1 - 5%, BaO 0 - 10%, TiO2 10 - 15%, La2O3 5 - 15%, Gd2O3 7 - 10%, Nb2O5 1 - 5%, ZrO2 3 - 5%. The cortical glass has a refractive index of 1.48 - 1.54, and the Mohs hardness of the cortical glass is 5.4 - 5.

5. The cortical glass consists of components with the following molar percentages as follows: SiO2 60 - 73%, B2O3 5 - 10%, BaO 0 - 5%, CaO 1 - 5%, Al2O3 0 - 6%, MgO 5 - 10%, Na2O 0.5 - 3%, K2O 5 - 28%, Li2O 0 - 2%.

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