Surface fogging treatment method for precise mould pressing chalcogenide glass
By heating the inert gas in a confined space and gradually soaking in HF, NaOH and pure aqueous solutions, the problem of fogging on the surface of sulfur-based glass is solved, the yield of precision molding is improved and the manufacturing cost is reduced.
Patent Information
- Application Number
- CN202411315660.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-20
- Publication Date
- 2025-03-28
AI Technical Summary
Sulfur glass is prone to volatilization during high-temperature molding, resulting in atomization on the surface, reducing the yield of precision molding and increasing manufacturing costs.
A precision molded sulfur-based glass surface fogging treatment method is adopted, which includes heating treatment with inert gas in a confined space, followed by step soaking in HF solution, NaOH solution and pure aqueous solution, and finally ultrasonic cleaning and centrifugation drying.
It effectively solves the problem of fogging on the surface of sulfur-based glass, improves the appearance quality of the product, improves the yield of precision molding and reduces manufacturing costs.
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of optical glass precision molding, and in particular relates to a method for fogging the surface of precision molded chalcogenide glass. Background Art
[0002] Optical glass precision molding technology is a high-precision optical component processing technology. The processed optical glass preform is placed in a high-precision mold, heated and pressurized in an oxygen-free environment to produce the required high-precision optical components. Precision molding technology has become the most advanced optical component manufacturing technology in the world. In recent years, with the rapid development of infrared security, monitoring and other fields, the market has demanded lighter, smaller, lower cost and better effect for various products. Chalcogenide glass aspheric lenses have been favored by optical designers.
[0003] In order to obtain high-quality optical components, precision molding has become the main manufacturing process for chalcogenide aspheric lenses. Chalcogenide glass is easy to volatilize during high-temperature molding due to its small number of constituent elements and poor glass stability. It is also easy to react with the mold interface, resulting in atomization on the surface of the final product and causing it to be scrapped, thereby reducing the yield of precision molding and increasing the molding manufacturing cost. Summary of the invention
[0004] In view of the problems existing in the background technology, the present invention provides a method for treating fogging on the surface of precision molded chalcogenide glass, aiming to solve the problem of fogging on the surface of precision molded chalcogenide glass, improve the yield of precision molding, and reduce the molding manufacturing cost.
[0005] In order to achieve the above object, the present invention adopts the following technical solution.
[0006] A method for treating the surface fogging of precision molded chalcogenide glass, characterized by comprising the following steps: (1) placing the precision molded chalcogenide glass in a closed space filled with an inert gas environment, performing a heating treatment, and then taking it out; (2) soaking the heat-treated precision molded chalcogenide glass in an HF solution and then taking it out; (3) placing the precision molded chalcogenide glass soaked in the HF solution into a NaOH solution and then taking it out; (4) The precision molded chalcogenide glass soaked in the NaOH solution is placed in a pure water solution for ultrasonic cleaning, and then taken out after centrifugal drying.
[0007] In the technical solution of the present invention, the inert gas filled in the enclosed space in step (1) is nitrogen or argon, the concentration of which is ≥99.995%, and the oxygen content is ≤20PPM; the heating temperature is 100°C-180°C, and the heating time is 3-60 minutes.
[0008] In the technical solution of the present invention, the concentration of nitrogen or argon in step (1) is ≥99.999%, and the oxygen content is ≤10PPM; the heating temperature is 110°C-160°C, and the heating time is 3-50 minutes.
[0009] In the technical solution of the present invention, the pH value of the HF solution in step (2) is 5-6.5, and the immersion time is 1 minute to 5 minutes.
[0010] The immersion time of the HF solution in step (2) of the technical solution of the present invention is 1 minute to 3 minutes.
[0011] In the technical solution of the present invention, the pH value of the NaOH solution in step (3) is 9-12, and the soaking time is 1 minute to 3 minutes.
[0012] The immersion time of the NaOH solution in step (3) of the technical solution of the present invention is 1 minute to 2 minutes.
[0013] In the technical solution of the present invention, in step (4), the resistivity of pure water is ≥15MΩ·cm, the ultrasonic frequency is 60-180KHZ, and the drying temperature is 30-80°C.
[0014] The technical solution of the present invention also includes the following steps: (1) placing the precision molded chalcogenide glass in a closed space filled with an inert gas environment, performing a heating treatment and then taking it out; wherein the closed space filled with an inert gas is nitrogen with a concentration of 99.995% and an oxygen content of 20 PPM; the heating temperature is 120° C. and the heating time is 10 minutes; (2) soaking the heat-treated precision molded chalcogenide glass in an HF solution and then taking it out; wherein the pH value of the HF solution is 6 and the soaking time is 2 minutes; (3) placing the precision molded chalcogenide glass soaked in the HF solution into a NaOH solution and then taking it out; wherein the pH value of the NaOH solution is 10 and the soaking time is 1 minute; (4) The precision molded chalcogenide glass soaked in the NaOH solution is placed in a pure water solution for ultrasonic cleaning, and is taken out after centrifugal drying; wherein the pure water resistivity is 16 MΩ·cm, the ultrasonic frequency is 80 KHZ, and the drying temperature is 50°C.
[0015] The technical solution of the present invention also includes the following steps: (1) placing the precision molded chalcogenide glass in a closed space filled with an inert gas environment, performing a heating treatment and then taking it out; wherein the closed space filled with an inert gas is argon gas with a concentration of 99.999% and an oxygen content of 10 PPM; the heating temperature is 160° C. and the heating time is 10 minutes; (2) soaking the heat-treated precision molded chalcogenide glass in an HF solution and then taking it out; wherein the pH value of the HF solution is 6.5 and the soaking time is 3 minutes; (3) placing the precision molded chalcogenide glass soaked in the HF solution into a NaOH solution and then taking it out; wherein the pH value of the NaOH solution is 11 and the soaking time is 1 minute; (4) The precision molded chalcogenide glass soaked in the NaOH solution is placed in a pure water solution for ultrasonic cleaning, and is taken out after centrifugal drying; wherein the pure water resistivity is 15 MΩ·cm, the ultrasonic frequency is 120 KHZ, and the drying temperature is 70°C.
[0016] The present invention has the beneficial effects that: the present invention solves the problem of fogging on the surface of precision molded chalcogenide glass, improves the appearance quality of the product, and increases the yield rate of precision molded chalcogenide glass.
[0017] The invention is mainly used for treating the surface fogging problem produced by precision molded chalcogenide optical glass. DETAILED DESCRIPTION
[0018] The following description is made in conjunction with the preferred embodiments of the present invention. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.
[0019] Embodiment 1 A method for treating the fogging of the surface of a precision molded chalcogenide glass, a precision molded chalcogenide lens with a diameter of Φ10 mm and made of Xinhuaguang IRG206, comprises the following steps: (1) Place the precision molded chalcogenide glass lens in a closed space filled with inert gas and heat it; Among them, the inert gas filled in the enclosed space is nitrogen, the concentration of which is 99.995% and the oxygen content is 20PPM; the heating temperature is 120°C and the heating time is 10 minutes.
[0020] (2) Soak the precision molded chalcogenide glass lens in the HF solution; The pH value of the HF solution is 6, and the immersion time is 2 minutes.
[0021] (3) Soak the precision molded chalcogenide glass lens in a NaOH solution; Among them, the pH value of the NaOH solution is 10, and the soaking time is 1 minute.
[0022] (4) Place the precision molded chalcogenide glass lens in a pure water solution for ultrasonic cleaning, and then take it out after centrifugal drying; Among them, the resistivity of pure water is 16MΩ·cm, the ultrasonic frequency is 80KHZ, and the drying temperature is 50℃.
[0023] Embodiment 2 A method for treating the fogging of the surface of a precision molded chalcogenide glass, a precision molded chalcogenide lens with a diameter of Φ15 mm and made of Xinhuaguang IRG201, comprises the following steps: (1) Place the precision molded chalcogenide glass lens in a closed space filled with inert gas and heat it; The inert gas filled in the enclosed space is argon with a concentration of 99.999% and an oxygen content of 10 PPM; the heating temperature is 160° C. and the heating time is 10 minutes.
[0024] (2) Soak the precision molded chalcogenide glass lens in the HF solution; The pH value of the HF solution is 6.5, and the immersion time is 3 minutes.
[0025] (3) Soak the precision molded chalcogenide glass lens in a NaOH solution; Among them, the pH value of the NaOH solution is 11, and the soaking time is 1 minute.
[0026] (4) Place the precision molded chalcogenide glass lens in a pure water solution for ultrasonic cleaning, and then take it out after centrifugal drying; Among them, the resistivity of pure water is 15MΩ·cm, the ultrasonic frequency is 120KHZ, and the drying temperature is 70℃.
[0027] The surface of the precision molded chalcogenide glass lens of Example 1 and Example 2 was fogged before treatment, and the appearance yield was less than 80%; the surface fogging of the precision molded chalcogenide glass lens was eliminated after treatment, and the yield was more than 95%.
[0028] The above are only some embodiments of the present invention. For those skilled in the art, several improvements can be made without departing from the inventive concept of the present invention, which all belong to the protection scope of the present invention.
Claims
1. A method for treating the surface fogging of precision molded chalcogenide glass, characterized in that The following steps are involved: (1) placing the precision molded chalcogenide glass in a closed space filled with an inert gas environment, performing a heating treatment, and then taking it out; (2) soaking the heat-treated precision molded chalcogenide glass in an HF solution and then taking it out; (3) placing the precision molded chalcogenide glass soaked in the HF solution into a NaOH solution and then taking it out; (4) The precision molded chalcogenide glass soaked in the NaOH solution is placed in a pure water solution for ultrasonic cleaning, and then taken out after centrifugal drying.
2. A method for treating the surface fogging of precision molded chalcogenide glass according to claim 1, characterized in that: In the step (1), the inert gas filled in the enclosed space is nitrogen or argon, the concentration of which is ≥99.995% and the oxygen content is ≤20PPM; the heating temperature is 100°C-180°C and the heating time is 3-60 minutes.
3. A method for treating the surface fogging of precision molded chalcogenide glass according to claim 2, characterized in that: In the step (1), the concentration of nitrogen or argon is ≥99.999%, and the oxygen content is ≤10PPM; the heating temperature is 110°C-160°C, and the heating time is 3-50 minutes.
4. A method for treating the surface fogging of precision molded chalcogenide glass according to claim 1, 2 or 3, characterized in that: In step (2), the pH value of the HF solution is 5-6.5, and the soaking time is 1 minute to 5 minutes.
5. A method for treating the surface hazing of precision molded chalcogenide glass according to claim 4, characterized in that: The immersion time of the HF solution in the step (2) is 1 minute to 3 minutes.
6. A method for treating the surface of precision molded chalcogenide glass by fogging according to any one of claims 1 to 3 and 5, characterized in that: In step (3), the pH value of the NaOH solution is 9-12, and the soaking time is 1 minute to 3 minutes.
7. A method for treating the surface hazing of precision molded chalcogenide glass according to claim 6, characterized in that: The immersion time of the NaOH solution in step (3) is 1 minute to 2 minutes.
8. A method for treating the surface of precision molded chalcogenide glass by fogging according to any one of claims 1 to 3, 5 and 7, characterized in that: In the step (4), the resistivity of pure water is ≥15MΩ·cm, the ultrasonic frequency is 60-180KHZ, and the drying temperature is 30-80°C.
9. A method for treating the surface fogging of precision molded chalcogenide glass according to claim 1, characterized in that The following steps are involved: (1) placing the precision molded chalcogenide glass in a closed space filled with an inert gas environment, performing a heating treatment and then taking it out; wherein the closed space filled with an inert gas is nitrogen with a concentration of 99.995% and an oxygen content of 20 PPM; the heating temperature is 120° C. and the heating time is 10 minutes; (2) soaking the heat-treated precision molded chalcogenide glass in an HF solution and then taking it out; wherein the pH value of the HF solution is 6 and the soaking time is 2 minutes; (3) placing the precision molded chalcogenide glass soaked in the HF solution into a NaOH solution and then taking it out; wherein the pH value of the NaOH solution is 10 and the soaking time is 1 minute; (4) The precision molded chalcogenide glass soaked in the NaOH solution is placed in a pure water solution for ultrasonic cleaning, and is taken out after centrifugal drying; wherein the pure water resistivity is 16 MΩ·cm, the ultrasonic frequency is 80 KHZ, and the drying temperature is 50°C.
10. A method for treating the surface fogging of precision molded chalcogenide glass according to claim 1, characterized in that The following steps are involved: (1) placing the precision molded chalcogenide glass in a closed space filled with an inert gas environment, performing a heating treatment and then taking it out; wherein the closed space filled with an inert gas is argon gas with a concentration of 99.999% and an oxygen content of 10 PPM; the heating temperature is 160° C. and the heating time is 10 minutes; (2) soaking the heat-treated precision molded chalcogenide glass in an HF solution and then taking it out; wherein the pH value of the HF solution is 6.5 and the soaking time is 3 minutes; (3) placing the precision molded chalcogenide glass soaked in the HF solution into a NaOH solution and then taking it out; wherein the pH value of the NaOH solution is 11 and the soaking time is 1 minute; (4) The precision molded chalcogenide glass soaked in the NaOH solution is placed in a pure water solution for ultrasonic cleaning, and is taken out after centrifugal drying; wherein the pure water resistivity is 15 MΩ·cm, the ultrasonic frequency is 120 KHZ, and the drying temperature is 70°C.