A low melting point microcrystalline glass ring for optical fiber panel sealing and preparation method thereof

Abstract

The invention discloses a low-melting-point microcrystalline glass ring for sealing an optical fiber panel and a preparation method thereof. The low-melting-point microcrystalline glass powder is made into a glass ring in advance, and the airtight connection between the optical fiber panel and the metal parts is achieved by melting and sealing the glass ring, thereby replacing the original manual coating of glass powder, drying and cleaning processes, reducing the skill requirements for the operator, and having high production efficiency. The produced low-melting-point microcrystalline glass rings have good consistency and high yield rate, and are suitable for industrial production. The low-melting-point microcrystalline glass rings are made by mechanical equipment, and the amount of the glass ring at the sealing position can be accurately controlled, which solves the problem of glass powder floating during subsequent sealing, can improve the sealing consistency, production efficiency and yield rate of the optical fiber panel, and are suitable for mass production.

Description

Technical Field

[0001] The invention belongs to the field of photoelectric detection device manufacturing, and in particular relates to a low-melting-point microcrystalline glass ring for sealing an optical fiber panel and a preparation method thereof. Background Art

[0002] As one of the imaging units of photoelectric detection devices, optical fiber panels directly determine the device's image brightness, image detail reproduction, image coupling transmission quality and other performance. They are widely used in low-light night vision, ultraviolet imaging, high-energy physics, lidar and other fields.

[0003] In the manufacturing process of photoelectric detection devices, optical fiber panel sealing is an important process, and the airtight connection between metal parts and optical fiber panels is achieved through the melting and sealing of low-melting-point microcrystalline glass powder. The traditional sealing method is to mix low-melting-point microcrystalline glass powder with pure water to form a paste, apply it to the sealing surface of metal parts, and dry it under infrared lamps. After the glass powder is dry, use a scraper to remove excess powder, blow it clean with an air gun, and use a fixture to position the sealing surface of the optical fiber panel and the metal part, and heat it in a high-temperature oven to complete the sealing. Due to the manual application of glass powder, the amount of glass powder at the sealing surface is difficult to accurately control, which is not conducive to the consistency and reliability of the sealing, and the operation process is time-consuming and labor-intensive. In addition, low-melting-point microcrystalline glass powder is a fine particle, which is very easy to adhere to the surface of the optical fiber panel. In the subsequent sealing process, it melts to form granular glass, resulting in unqualified product appearance. Summary of the invention

[0004] In view of the above problems, an object of the present invention is to provide a low-melting-point microcrystalline glass ring for sealing optical fiber panels and a preparation method thereof.

[0005] The specific technical solution for achieving the purpose of the present invention is:

[0006] A method for preparing a low-melting-point microcrystalline glass ring for sealing an optical fiber panel comprises the following steps:

[0007] Step 1, preparing a binder by mixing ethyl cellulose and terpineol in a certain ratio;

[0008] Step 2, mixing the low melting point glass-ceramics powder and the binder in a certain proportion, granulating, and forming a granular powder;

[0009] Step 3, drying the granular powder formed in step 2;

[0010] Step 4, placing the dried granular powder into a glass ring mold, and pressing it into a glass ring using a press;

[0011] Step 5: Take the glass ring out of the mold and put it into an oven for debinding and curing to complete the preparation.

[0012] Furthermore, the weight ratio of the ethyl cellulose to the volume ratio of the terpineol in step 1 is in the range of 1:100 to 1:200, wherein the weight unit of the ethyl cellulose is gram, and the volume unit of the terpineol is milliliter.

[0013] Furthermore, the ratio of the volume of the binder to the weight of the low-melting-point glass-ceramics powder in step 2 is 1:100 to 1:10, wherein the volume of the binder is in milliliters and the weight of the low-melting-point glass-ceramics powder is in grams;

[0014] The particle size distribution of the formed granular powder is 20 μm to 200 μm.

[0015] Furthermore, the drying temperature in step 3 is in the range of 70° C. to 90° C., and the drying time is in the range of 5 h to 10 h.

[0016] Furthermore, the pressure range of the press in step 4 is 1 MPa to 100 MPa.

[0017] Furthermore, the temperature range of the oven for debinding and curing in step 5 is 320° C. to 360° C., and the time range is 1 hour to 3 hours.

[0018] The present invention also provides a low-melting-point microcrystalline glass ring based on the above-mentioned preparation method, wherein the melting-point microcrystalline glass ring is used for sealing the optical fiber panel. The low-melting-point microcrystalline glass ring is placed between the optical fiber panel and the metal part, heated to the sealing temperature, and kept warm for a certain period of time to complete the sealing of the optical fiber panel.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] (1) The preparation method of the scheme of the present invention is simple to operate. By pre-forming the low-melting-point microcrystalline glass powder into a glass ring, the original manual coating of glass powder, drying and cleaning processes are replaced, the skill requirements for the operator are reduced, the production efficiency is high, the low-melting-point microcrystalline glass rings produced are of good consistency, and the yield is high. It is suitable for industrial production. The low-melting-point microcrystalline glass rings are made by mechanical equipment, and the amount of glass rings at the sealing point can be accurately controlled, which solves the problem of glass powder floating during subsequent sealing.

[0021] (2) The low-melting-point microcrystalline glass ring of the present invention is made into a glass ring in advance by using low-melting-point microcrystalline glass powder, and the airtight connection between the optical fiber panel and the metal parts is achieved by melting and sealing the glass ring, thereby improving the sealing consistency, production efficiency and yield rate of the optical fiber panel, and is suitable for mass production.

[0022] The present invention is further described below in conjunction with specific implementation modes. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 The figure is a schematic diagram of the structure of the low-melting-point microcrystalline glass ring used for sealing the optical fiber panel of the present invention.

[0024] Figure 2 A schematic diagram of the structure of sealing an optical fiber panel based on the low-melting-point microcrystalline glass ring of the present invention. DETAILED DESCRIPTION

[0025] In order to clearly describe the technical solution and the effects achieved by the present invention, the technical solution of the present invention is clearly explained below in combination with the accompanying drawings and specific embodiments of the present invention, so that technical personnel in the field can implement the invention without performing creative work. The structure shown in the accompanying drawings is not the entire actual structure but only a part of the actual structure. It should be noted that all other embodiments made by ordinary technical personnel in the field on the basis of the embodiments of the present invention without performing creative work should fall within the protection scope of the present invention.

[0026] The following examples are only for better explanation of the present invention, but the content of the present invention is not limited to the application in the examples. Therefore, those skilled in the art can make non-essential modifications to the implementation scheme based on the above invention content and apply it to other embodiments, which is still within the protection scope of the present invention. In addition, the experimental methods without specific conditions in the following examples should be carried out according to the conventional conditions or the conditions recommended by the manufacturer. If the expressions in the text are not specially explained, they are only used for distinction and have no other meanings.

[0027] Example

[0028] Combination Figure 1 A method for preparing a low-melting-point microcrystalline glass ring for sealing an optical fiber panel, characterized in that it comprises the following steps:

[0029] Step 1, preparing a binder by mixing ethyl cellulose and terpineol in a certain ratio;

[0030] Specifically, the weight of ethyl cellulose and the volume of terpineol are in the range of 1:100 to 1:200, wherein the weight of ethyl cellulose is in grams and the volume of terpineol is in milliliters;

[0031] In this embodiment, 1 g of ethyl cellulose and 150 ml of pine alcohol are mixed evenly with a stirrer to form a liquid adhesive, and stirred for 24 hours to allow the ethyl cellulose to completely dissolve in the pine alcohol to form a liquid adhesive;

[0032] Step 2, mixing the low melting point glass-ceramics powder and the binder in a certain proportion, granulating, and forming a granular powder;

[0033] The ratio of the binder volume to the low-melting-point microcrystalline glass powder weight is 1:100 to 1:10, wherein the binder volume unit is milliliter and the low-melting-point microcrystalline glass powder weight unit is gram; the particle size distribution of the formed granular powder is 20μm to 200μm.

[0034] In this embodiment, 10 ml of binder and 500 g of low-melting-point microcrystalline glass powder are put into a granulator for mixing and granulation. The granular powder formed by granulation is sieved with a 150-mesh standard sieve and a 300-mesh standard sieve to obtain a granular powder with a particle size distribution of 53 μm to 100 μm.

[0035] Step 3, drying the granular powder formed in step 2, the drying temperature range is 70°C to 90°C, and the drying time range is 5h to 10h;

[0036] In this embodiment, the screened granular powder is placed in an oven with hot air circulation, the drying temperature is 80°C, the heat preservation time is 6h, and after the heat preservation is completed, it is cooled to room temperature with the furnace;

[0037] Step 4, putting the dried granular powder into a glass ring mold, and pressing it into a glass ring using a press, wherein the pressure range of the press is 1MPa to 100MPa;

[0038] In this embodiment, the dried granular powder is poured into a ring-shaped pressing mold, the powder completely covers the surface of the mold, and the press is started to press the granular powder into a low-melting-point microcrystalline glass ring blank at a pressing pressure of 60 MPa;

[0039] Step 5, taking the glass ring out of the mold and putting it into an oven for debinding and curing, the temperature range of debinding and curing is 320°C to 360°C, and the time range is 1h to 3h, and the preparation is completed;

[0040] In this embodiment, after the low-melting-point microcrystalline glass ring blank is taken out of the mold, it is placed in an oven with hot air circulation for debinding and curing. The heating rate is 1.5°C / min, the debinding and curing temperature is 340°C, and the insulation time is 2h. After the insulation is completed, the temperature is cooled to room temperature with the furnace, and the preparation of the low-melting-point microcrystalline glass ring is completed.

[0041] Combination Figure 2 The melting point microcrystalline glass ring in this scheme is used for sealing the optical fiber panel. The low melting point microcrystalline glass ring 1 is placed between the optical fiber panel 2 and the metal part 3, heated to the sealing temperature, and kept warm for a certain period of time to complete the sealing of the optical fiber panel.

[0042] This solution pre-makes low-melting-point microcrystalline glass powder into glass rings, and achieves an airtight connection between the optical fiber panel and the metal parts through glass ring sealing, replacing the original manual application of glass powder, drying and cleaning processes, reducing the skill requirements for operators, and has high production efficiency. The low-melting-point microcrystalline glass rings produced have good consistency and high yield rate, which is suitable for industrial production. The low-melting-point microcrystalline glass rings are made by mechanical equipment, and the amount of glass ring at the sealing point can be precisely controlled, which solves the problem of glass powder floating during subsequent sealing, can improve the sealing consistency, production efficiency and yield rate of the optical fiber panel, and is suitable for mass production.

[0043] The above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the attached claims.

Claims

1. A method for preparing a low-melting-point microcrystalline glass ring for sealing an optical fiber panel, characterized in that: The following steps are involved: Step 1, preparing a binder by mixing ethyl cellulose and terpineol in a certain ratio; Step 2, mixing the low melting point glass-ceramics powder and the binder in a certain proportion, granulating, and forming a granular powder; Step 3, drying the granular powder formed in step 2; Step 4, placing the dried granular powder into a glass ring mold, and pressing it into a glass ring using a press; Step 5: Take the glass ring out of the mold and put it into an oven for debinding and curing to complete the preparation.

2. The method for preparing a low-melting-point microcrystalline glass ring for sealing an optical fiber panel according to claim 1, characterized in that: The weight ratio of the ethyl cellulose to the volume ratio of the terpineol in step 1 is in the range of 1:100 to 1:200, wherein the weight unit of the ethyl cellulose is gram, and the volume unit of the terpineol is milliliter.

3. The method for preparing a low-melting-point microcrystalline glass ring for sealing an optical fiber panel according to claim 1, characterized in that: The ratio of the volume of the binder to the weight of the low-melting-point glass-ceramics powder in step 2 is 1:100 to 1:10, wherein the volume of the binder is in milliliters and the weight of the low-melting-point glass-ceramics powder is in grams; The particle size distribution of the formed granular powder is 20 μm to 200 μm.

4. The method for preparing a low-melting-point microcrystalline glass ring for sealing an optical fiber panel according to claim 1, characterized in that: The drying temperature in step 3 is in the range of 70° C. to 90° C., and the drying time is in the range of 5 h to 10 h.

5. The method for preparing a low-melting-point microcrystalline glass ring for sealing an optical fiber panel according to claim 1, characterized in that: The pressure range of the press during pressing in step 4 is 1 MPa to 100 MPa.

6. The method for preparing a low-melting-point microcrystalline glass ring for sealing an optical fiber panel according to claim 1, characterized in that: The temperature range of the oven for debinding and curing in step 5 is 320° C. to 360° C., and the time range is 1 hour to 3 hours.

7. A low-melting-point microcrystalline glass ring produced by the method for producing a low-melting-point microcrystalline glass ring according to any one of claims 1 to 6, characterized in that: The melting point microcrystalline glass ring is used for sealing an optical fiber panel. The low melting point microcrystalline glass ring (1) is placed between an optical fiber panel (2) and a metal part (3), heated to a sealing temperature, and kept warm for a certain period of time to complete the sealing of the optical fiber panel.

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