阅读说明：本技术 一种封接光纤及65锰钢用氧化石墨烯修饰铅扩散玻璃粉的制备方法 (Preparation method of graphene oxide modified lead diffusion glass powder for sealing optical fiber and 65 manganese steel ) 是由 王刚 王振勇 马生华 王若晖 李双双 马琦琦 于 2021-11-18 设计创作，主要内容包括：本发明公开了一种封接光纤及65锰钢用氧化石墨烯修饰铅扩散玻璃粉的制备方法,首先采用熔融淬火法制备无铅低熔点玻璃粉,再将其与纳米氧化铅粉末混合球磨,得到包覆纳米氧化铅的玻璃粉,经退火、改性分散剂改性,最后与超声分散好的氧化石墨烯分散液在无水乙醇中混合,获得氧化石墨烯修饰铅扩散玻璃粉。本发明制备的氧化石墨烯修饰铅扩散玻璃粉具有良好的网状结构,能与光纤及65锰钢形成较好的粘结效果,较低的封接温度(400～450℃),优良的导热性、耐腐蚀能力、抗氧化能力、热稳定性、热膨胀系数等特殊性能为光纤封接在某种弹性材料上提供了新的思路,扩宽了低熔点玻璃粉的应用领域。(The invention discloses a preparation method of graphene oxide modified lead diffusion glass powder for sealing optical fibers and 65 manganese steel, which comprises the steps of preparing lead-free low-melting-point glass powder by a melting quenching method, mixing the glass powder with nano lead oxide powder, carrying out ball milling to obtain glass powder coated with nano lead oxide, annealing, modifying by a modified dispersing agent, and finally mixing the glass powder with graphene oxide dispersion liquid subjected to ultrasonic dispersion in absolute ethyl alcohol to obtain the graphene oxide modified lead diffusion glass powder. The graphene oxide modified lead diffusion glass powder prepared by the invention has a good net structure, can form a good bonding effect with optical fibers and 65 manganese steel, has a low sealing temperature (400-450 ℃), and provides a new idea for sealing the optical fibers on a certain elastic material due to the special properties of excellent thermal conductivity, corrosion resistance, oxidation resistance, thermal stability, thermal expansion coefficient and the like, thereby widening the application field of the low-melting-point glass powder.)

1. A preparation method of graphene oxide modified lead diffusion glass powder for sealing optical fibers and 65 manganese steel is characterized by comprising the following steps:

(1) preparation of lead-free low-melting glass

According to the weight percentage of the lead-free low-melting-point glass, Bi₂O₃、H₃BO₃、ZnO、P₂O₅、SiO₂、Na₂CO₃、Al₂O₃、SnO、TeO、CuO、Fe₂O₃And placing the carbonate of the R into a sealed sample preparation crusher for pre-grinding to be uniformly mixed, pouring the pre-mixture into a ceramic crucible and placing the ceramic crucible into a high-temperature electric furnace, heating the ceramic crucible from room temperature to 1100-1300 ℃ at the heating rate of 5-10 ℃/min by using the high-temperature electric furnace, placing the ceramic crucible into the high-temperature electric furnace for smelting for 30-60 min, pouring the obtained clear molten glass into deionized water for quenching and drying to obtain lead-free low-melting-point glass;

the lead-free low-melting-point glass comprises the following components in percentage by weight: 45 to 75 percent of Bi₂O₃、15％～40％B₂O₃、1％～15％ZnO、10％～30％P₂O₅、2％～5％SiO₂、1％～10％Na₂O、1％～3％Al₂O₃、2％～7％SnO、5％～15％TeO、1％～5％CuO、1％～3％Fe₂O₃0-10% of R oxide, wherein the sum of the weight percentages of the components is 100%, wherein R is at least two of Li, Ca, Cs, Sr and Ba;

(2) nano lead oxide coated glass powder

Mixing and ball-milling the lead-free low-melting-point glass and the nano lead oxide powder, sieving the mixture by using a 600-800-mesh screen, adding ultrapure water, uniformly mixing the mixture, gradually increasing the centrifugal rate within the range of 5000-8000 r/min, carrying out differential centrifugation, removing the nano lead oxide without coating the glass powder, and drying the nano lead oxide to obtain the nano lead oxide-coated glass powder;

(3) annealing treatment

Pouring glass powder coated with nano lead oxide into a ceramic crucible, putting the ceramic crucible into a high-temperature electric furnace, simultaneously heating the high-temperature electric furnace from room temperature to 300-350 ℃ at a heating rate of 5-10 ℃/min, heating the high-temperature electric furnace to 480-520 ℃ at a heating rate of 2-5 ℃/min, preserving heat for 30-50 min, cooling the high-temperature electric furnace to 200-250 ℃ at a heating rate of 4-6 ℃/min, and naturally cooling to obtain annealed glass powder;

(4) graphene oxide modified glass powder

Adding the annealed glass powder and a modified dispersing agent into absolute ethyl alcohol, and stirring at 50-75 ℃ until the absolute ethyl alcohol is volatilized to be dry to obtain modified glass powder; ultrasonically dispersing graphene oxide and polyvinylpyrrolidone in absolute ethyl alcohol, adding modified glass powder, stirring at 50-75 ℃ to uniformly mix the graphene oxide and the modified glass powder, drying, and crushing to obtain the graphene oxide modified lead diffusion glass powder.

2. The method for preparing the graphene oxide modified lead diffusion glass powder for the sealed optical fiber and the 65 manganese steel according to claim 1, which is characterized in that: in the step (2), the weight ratio of the lead-free low-melting-point glass to the nano lead oxide powder is 1: 0.1-0.3.

3. The method for preparing the graphene oxide modified lead diffusion glass powder for the sealed optical fiber and the 65 manganese steel according to claim 1, which is characterized in that: in the step (4), the weight-volume ratio of the annealed glass powder to the modified dispersing agent is 1g: 0.1-0.2 mL.

4. The method for preparing the sealing optical fiber and the graphene oxide modified lead diffusion glass powder for 65 manganese steel according to claim 1 or 3, which is characterized in that: in the step (4), the modified dispersant is at least one of an amino-containing silane coupling agent KH-550, stearic acid and polyvinyl aldehyde butyraldehyde ester.

5. The method for preparing the graphene oxide modified lead diffusion glass powder for the sealed optical fiber and the 65 manganese steel according to claim 1, which is characterized in that: in the step (4), the weight ratio of the graphene oxide to the polyvinylpyrrolidone to the modified glass powder is 1: 0.15-0.25: 15-25.

Technical Field

The invention belongs to the technical field of optical fiber and 65 manganese steel sealing, and particularly relates to a preparation method of graphene oxide modified lead diffusion glass powder for optical fiber and 65 manganese steel sealing.

Background

Because the traditional solid glue can not meet the requirements of sealing optical fibers and simultaneously ensuring the transmission efficiency of the optical fibers and the like, the glass ceramic or the microcrystalline glass composed of mixed oxides is gradually replacing the traditional solid glue to become a candidate material in the field of sealing application, one key factor is that the glass ceramic or the microcrystalline glass has good wettability on a sealing substrate and simultaneously the corrosion resistance and the oxidation resistance are obviously improved, so the low-melting glass ceramic attracts more and more attention of researchers. Graphene oxide is a single-layer material obtained by oxidizing graphite, is a carbon material with the highest heat conductivity coefficient so far and has very good heat conduction performance, and meanwhile, the oxygen content in the graphene oxide is greatly increased, so that the wettability of glass powder is improved, and the viscosity is increased, so that the addition of the graphene oxide into the glass powder has very practical value. The lead source can generate corresponding protective films in the air, humid environment, sulfuric acid and other media, has stronger corrosion resistance, and can improve the corrosion resistance of the lead-free low-melting-point glass powder to the substrate and the whole corrosion resistance. Because the 65 manganese steel has good elasticity and high expansion coefficient (15-16 multiplied by 10)^-6/° c), etc., so that the sealing glass has the performance requirements of low melting point and high expansion coefficient. Meanwhile, the optical fiber needs to deal with different external environments in the transmission process, which puts higher requirements on the properties of the sealing glass, such as heat conductivity, corrosion resistance, external interference resistance, aging resistance, viscosity and the like.

Disclosure of Invention

The invention aims to provide a preparation method of low-melting-point graphene oxide modified lead diffusion glass powder with properties of proper thermal expansion coefficient, corrosion resistance, better viscosity and the like, so as to meet the application requirements of packaged optical fibers and 65 manganese steel materials.

Aiming at the purposes, the technical scheme adopted by the invention comprises the following steps:

1. preparation of lead-free low-melting glass

According to the weight percentage of the lead-free low-melting-point glass, Bi₂O₃、H₃BO₃、ZnO、P₂O₅、SiO₂、Na₂CO₃、Al₂O₃、SnO、TeO、CuO、Fe₂O₃And placing the carbonate of the R into a sealed sample preparation crusher for pre-grinding to be uniformly mixed, pouring the pre-mixture into a ceramic crucible and placing the ceramic crucible into a high-temperature electric furnace, heating the ceramic crucible from room temperature to 1100-1300 ℃ at the heating rate of 5-10 ℃/min by using the high-temperature electric furnace, placing the ceramic crucible into the high-temperature electric furnace for smelting for 30-60 min, pouring the obtained clear molten glass into deionized water for quenching and drying to obtain the lead-free low-melting-point glass. Wherein the lead-free low-melting-point glass comprises the following components in percentage by weight: 45 to 75 percent of Bi₂O₃、15％～40％B₂O₃、1％～15％ZnO、10％～30％P₂O₅、2％～5％SiO₂、1％～10％Na₂O、1％～3％Al₂O₃、2％～7％SnO、5％～15％TeO、1％～5％CuO、1％～3％Fe₂O₃And 0-10% of R oxide, wherein the sum of the weight percentages of the components is 100%, and R is at least two of Li, Ca, Cs, Sr and Ba.

2. Nano lead oxide coated glass powder

Mixing and ball-milling the lead-free low-melting-point glass and the nano lead oxide powder, sieving the mixture by using a 600-800-mesh screen, adding ultrapure water, uniformly mixing the mixture, gradually increasing the centrifugal rate within the range of 5000-8000 r/min, carrying out differential centrifugation, removing the nano lead oxide without coating the glass powder, and drying the nano lead oxide-coated glass powder to obtain the nano lead oxide-coated glass powder.

3. Annealing treatment

Pouring the glass powder coated with the nano lead oxide into a ceramic crucible, putting the ceramic crucible into a high-temperature electric furnace, simultaneously heating the high-temperature electric furnace from room temperature to 300-350 ℃ at a heating rate of 5-10 ℃/min, heating to 480-520 ℃ at a heating rate of 2-5 ℃/min, preserving heat for 30-50 min, cooling to 200-250 ℃ at a heating rate of 4-6 ℃/min, and naturally cooling to obtain the annealed glass powder.

4. Graphene oxide modified glass powder

Adding the annealed glass powder and a modified dispersing agent into absolute ethyl alcohol, and stirring at 50-75 ℃ until the absolute ethyl alcohol is volatilized to be dry to obtain modified glass powder; ultrasonically dispersing graphene oxide and polyvinylpyrrolidone in absolute ethyl alcohol, adding modified glass powder, stirring at 50-75 ℃ to uniformly mix the graphene oxide and the modified glass powder, drying, and crushing to obtain the graphene oxide modified lead diffusion glass powder.

In the step 2, the weight ratio of the lead-free low-melting-point glass to the nano lead oxide powder is preferably 1:0.1 to 0.3.

In the step 4, the weight-volume ratio of the annealed glass powder to the modified dispersant is preferably 1g: 0.1-0.2 mL. Wherein the modified dispersant is at least one of an amino silane-containing coupling agent KH-550, stearic acid and polyvinyl aldehyde butyraldehyde ester.

In the step 4, the weight ratio of the graphene oxide to the polyvinylpyrrolidone to the modified glass powder is preferably 1: 0.15-0.25: 15-25.

The invention has the following beneficial effects:

1. under the condition that no lead element is added into the glass powder, the glass transition temperature of the glass powder is close to that of lead-containing glass, the nano lead oxide is coated to improve the corrosion resistance of the lead-free low-melting-point glass powder to a substrate and the corrosion resistance of packaging glass, and the modified graphene oxide can obviously reduce the softening temperature of the glass, improve the thermal stability of the glass, improve the thermal expansion coefficient and other properties.

2. The graphene oxide modified lead diffusion glass powder prepared by the invention has a good net structure, can form a good bonding effect with 65 manganese steel, provides good properties for optical fiber to be sealed on a certain elastic material due to the special properties of low sealing temperature (400-450 ℃), excellent thermal conductivity and the like, and widens the application field of low-melting-point glass powder. The low-melting-point glass powder not only meets the requirements of developing new fields, but also has pioneering effect on packaging other electronic components by the glass powder, and does not pollute the environment in the production process. The method has simple process, convenient use and good functionality, and provides a new idea for the application of optical fiber sealing.

Drawings

FIG. 1 is a graph comparing EDS of W1(a) and W2(b) in example 1.

FIG. 2 is a graph comparing EDS of W1(a) and W3(b) in example 1.

FIG. 3 is a high temperature microscopic characterization of W1, W3, G1, G3, Q1, Q3 in example 1.

Fig. 4 is an apparatus diagram and flow chart of the encapsulation process.

FIG. 5 is SEM images of encapsulated fibers of W1(a), W2(b), and W3(c) in example 1.

Fig. 6 is a wavelength variation diagram of the W3 packaging process.

Detailed Description

The present invention will be described in further detail with reference to examples, but the scope of the present invention is not limited to these examples.

Example 1

1. Preparation of lead-free low-melting glass

Comprises the following components in percentage by weight: 48% Bi₂O₃、16.5％B₂O₃、2.8％ZnO、10％P₂O₅、2.5％SiO₂、5.5％Na₂O、1.5％Al₂O₃、2.4％SnO、5.3％TeO、1％CuO、1％Fe₂O₃、0.5％Li₂O₃2% SrO, 1% BaO, accurately weighing 24g Bi₂O₃、14.65g H₃BO₃、1.4g ZnO、5g P₂O₅、1.25g SiO₂、4.70g Na₂CO₃、0.75g Al₂O₃、1.20g SnO、2.65g TeO、0.5g CuO、0.5g Fe₂O₃、0.62g Li₂CO₃、1.43g SrCO₃、0.64g BaCO₃Pre-grinding in a sealed sample preparation grinder to uniformly mix, pouring the pre-mixture into a ceramic crucible, simultaneously heating the high-temperature electric furnace to 500 ℃ from room temperature at the heating rate of 5 ℃/min, then heating to 1300 ℃ at the heating rate of 10 ℃/min, placing the ceramic crucible into the high-temperature electric furnace to be smelted for 40min after the heating is finished, opening a furnace door at intervals of 10min during the smelting, slightly shaking the ceramic crucible and uncovering a crucible cover to uniformly heat the mixture in the crucible, shaking for 2-3 times to finally obtain clear molten glass, and pouring the clear molten glass into a separation furnaceAnd (3) quenching in water, and drying the obtained glass particles in a 60 ℃ drying oven (repeatedly washing with industrial alcohol, so that the drying efficiency is improved). The dried glass particles were named W1.

2. Nano lead oxide coated glass powder

Mixing 10g of glass particles W1 and 2g of nano lead oxide powder, pouring the mixture into a ball milling tank, adding zirconium balls to two thirds of the tank body, carrying out high-energy ball milling for 6h at the rotating speed of 500r/min (dry milling enables the nano lead oxide powder to be better coated on the glass particles), sieving the mixture by a 600-mesh sieve, gradually increasing the centrifugal rate of the sieved solid powder within the range of 5000-8000 r/min by using ultrapure water, carrying out differential centrifugation for multiple times, removing the nano lead oxide without coating the glass powder, and drying to obtain the glass powder coated with the nano lead oxide, wherein the name of the glass powder coated with the nano lead oxide is W2. EDS analysis of fig. 1 (b) compared to (a) clearly contained lead element, indicating successful diffusion of nano lead oxide to W1. The particle size D50 measured by a laser particle sizer is 9-15 μm (meeting the requirement of the particle size of the glass preform).

3. Annealing treatment

Pouring glass powder W2 coated with nano lead oxide into a ceramic crucible, placing the ceramic crucible into a high-temperature electric furnace, simultaneously heating the high-temperature electric furnace from room temperature to 350 ℃ at the speed of 6 ℃/min, heating to 500 ℃ at the speed of 4 ℃/min, preserving heat for 40min, then cooling to 250 ℃ at the speed of 5 ℃/min, and naturally cooling to reduce the residual stress of the glass powder, reduce the deformation and crack tendency and eliminate the tissue defects.

4. Graphene oxide modified glass powder

4.76g of the glass powder annealed in the step 3 is placed in a 50mL beaker, 500 μ L of the aminosilane-containing coupling agent KH-550 is poured into the beaker, 30mL of absolute ethyl alcohol is added, and the beaker is placed on a constant-temperature magnetic stirrer and stirred for 3 hours at 65 ℃ to volatilize the absolute ethyl alcohol to obtain the modified glass powder. Adding 0.20g of graphene oxide and 50mg of PVP into 40mL of absolute ethyl alcohol, performing ultrasonic dispersion uniformly, mixing with modified glass powder in a beaker, stirring at 65 ℃ for 3 hours again to uniformly mix the graphene oxide and the modified glass powder, drying in a 60 ℃ oven for 10 hours, transferring to a sealed sample preparation crusher, and crushing to obtain the graphene oxide modified lead diffusion glass powder, wherein the name of the graphene oxide modified lead diffusion glass powder is W3. The EDS characterization is shown in fig. 2, where the content of C in (b) is significantly higher than that in (a), indicating that graphene is successfully modified.

Example 2

1. Preparation of lead-free low-melting glass

Comprises the following components in percentage by weight: 46.5% Bi₂O₃、16.5％B₂O₃、2.8％ZnO、13％P₂O₅、2.5％SiO₂、4％Na₂O、1.5％Al₂O₃、2.4％SnO、5.3％TeO、1％CuO、1％Fe₂O₃、0.5％Li₂O₃2% SrO, 1% BaO, 23.25g Bi was accurately weighed₂O₃、14.65g H₃BO₃、1.4g ZnO、6.5g P₂O₅、1.25g SiO₂、3.42g Na₂CO₃、0.75g Al₂O₃、1.20g SnO、2.65g TeO、0.5g CuO、0.5g Fe₂O₃、0.62g Li₂CO₃、1.43g SrCO₃、0.64g BaCO₃Placing the mixture into a sealed sample preparation crusher for pre-grinding to be uniformly mixed, pouring the premix into a ceramic crucible, simultaneously heating the high-temperature electric furnace to 500 ℃ from room temperature at the heating rate of 5 ℃/min, then heating to 1300 ℃ at the heating rate of 10 ℃/min, placing the ceramic crucible into the high-temperature electric furnace for smelting for 40min after the heating is finished, opening a furnace door at intervals of 10min during the smelting, slightly shaking the ceramic crucible and uncovering a crucible cover to uniformly heat the mixture in the crucible, shaking for 2-3 times to finally obtain clear molten glass, pouring the clear molten glass into deionized water for quenching, and drying the obtained glass particles in a 60 ℃ oven (repeatedly washing by industrial alcohol, and improving the drying efficiency). The dried glass particles were named G1.

2. Nano lead oxide coated glass powder

Mixing 10G of glass particles G1 and 2G of nano lead oxide powder, pouring the mixture into a ball milling tank, adding zirconium balls to two thirds of the tank body, carrying out high-energy ball milling for 6h at the rotating speed of 500r/min (dry milling enables the nano lead oxide powder to be better coated on the glass particles), sieving the mixture by a 600-mesh sieve, gradually increasing the centrifugal rate of the sieved solid powder within the range of 5000-8000 r/min by using ultrapure water, carrying out differential centrifugation for multiple times, removing the nano lead oxide without coating the glass powder, and drying to obtain the glass powder coated with the nano lead oxide, wherein the name of the glass powder is G2.

3. Annealing treatment

Pouring glass powder G2 coated with nano lead oxide into a ceramic crucible, putting the ceramic crucible into a high-temperature electric furnace, simultaneously heating the high-temperature electric furnace from room temperature to 350 ℃ at the speed of 6 ℃/min, heating to 500 ℃ at the speed of 4 ℃/min, preserving heat for 40min, then cooling to 250 ℃ at the speed of 5 ℃/min, and naturally cooling to reduce the residual stress of the glass powder, reduce the deformation and crack tendency and eliminate the tissue defects.

4. Graphene oxide modified glass powder

4.76g of the glass powder annealed in the step 3 is placed in a 50mL beaker, 500 μ L of the aminosilane-containing coupling agent KH-550 is poured into the beaker, 30mL of absolute ethyl alcohol is added, and the beaker is placed on a constant-temperature magnetic stirrer and stirred for 3 hours at 65 ℃ to volatilize the absolute ethyl alcohol to obtain the modified glass powder. Adding 0.30G of graphene oxide and 50mg of PVP into 40mL of absolute ethyl alcohol, performing ultrasonic dispersion uniformly, mixing with modified glass powder in a beaker, stirring at 65 ℃ for 3 hours again to uniformly mix the graphene oxide and the modified glass powder, drying in a 60 ℃ oven for 10 hours, transferring to a sealed sample preparation crusher, and crushing to obtain the graphene oxide modified lead diffusion glass powder, wherein the name of the graphene oxide modified lead diffusion glass powder is G3.

Example 3

1. Preparation of lead-free low-melting glass

Comprises the following components in percentage by weight: 45% Bi₂O₃、16.5％B₂O₃、2.8％ZnO、16％P₂O₅、2.5％SiO₂、2.5％Na₂O、1.5％Al₂O₃、2.4％SnO、5.3％TeO、1％CuO、1％Fe₂O₃、0.5％Li₂O₃2% SrO, 1% BaO, 22.5g Bi was accurately weighed₂O₃、14.65g H₃BO₃、1.4g ZnO、8g P₂O₅、1.25g SiO₂、2.1375g Na₂CO₃、0.75g Al₂O₃、1.20g SnO、2.65g TeO、0.5g CuO、0.5g Fe₂O₃、0.62g Li₂CO₃、1.43g SrCO₃、0.64g BaCO₃Placing the mixture into a sealed sample preparation crusher for pre-grinding to be uniformly mixed, pouring the premix into a ceramic crucible, simultaneously heating the high-temperature electric furnace to 500 ℃ from room temperature at the heating rate of 5 ℃/min, then heating to 1300 ℃ at the heating rate of 10 ℃/min, placing the ceramic crucible into the high-temperature electric furnace for smelting for 40min after the heating is finished, opening a furnace door at intervals of 10min during the smelting, slightly shaking the ceramic crucible and uncovering a crucible cover to uniformly heat the mixture in the crucible, shaking for 2-3 times to finally obtain clear molten glass, pouring the clear molten glass into deionized water for quenching, and drying the obtained glass particles in a 60 ℃ oven (repeatedly washing by industrial alcohol, and improving the drying efficiency). The dried glass particles were named Q1.

2. Nano lead oxide coated glass powder

Mixing 10g of glass particles Q1 and 2g of nano lead oxide powder, pouring the mixture into a ball milling tank, adding zirconium balls to two thirds of the tank body, carrying out high-energy ball milling for 6h at the rotating speed of 500r/min (dry milling enables the nano lead oxide powder to be better coated on the glass particles), sieving the mixture by a 600-mesh sieve, gradually increasing the centrifugal rate of the sieved solid powder within the range of 5000-8000 r/min by using ultrapure water, carrying out differential centrifugation for multiple times, removing the nano lead oxide without coating the glass powder, and drying to obtain the nano lead oxide-coated glass powder, which is named as Q2.

3. Annealing treatment

Pouring the glass powder Q2 coated with the nano lead oxide into a ceramic crucible and putting the ceramic crucible into a high-temperature electric furnace, simultaneously heating the high-temperature electric furnace from room temperature to 350 ℃ at the speed of 6 ℃/min, heating to 500 ℃ at the speed of 4 ℃/min, preserving heat for 40min, then cooling to 250 ℃ at the speed of 5 ℃/min, and naturally cooling to reduce the residual stress of the glass powder, reduce the deformation and crack tendency and eliminate the tissue defects.

4. Graphene oxide modified glass powder

4.76g of the glass powder annealed in the step 3 is placed in a 50mL beaker, 500 μ L of the aminosilane-containing coupling agent KH-550 is poured into the beaker, 30mL of absolute ethyl alcohol is added, and the beaker is placed on a constant-temperature magnetic stirrer and stirred for 3 hours at 65 ℃ to volatilize the absolute ethyl alcohol to obtain the modified glass powder. Adding 0.25g of graphene oxide and 50mg of PVP into 40mL of absolute ethyl alcohol, performing ultrasonic dispersion uniformly, mixing the mixture with modified glass powder in a beaker, stirring at 65 ℃ for 3 hours again to uniformly mix the graphene oxide and the modified glass powder, drying in a 60 ℃ oven for 10 hours, transferring to a sealed sample preparation crusher, and crushing to obtain the graphene oxide modified lead diffusion glass powder, wherein the name of the graphene oxide modified lead diffusion glass powder is Q3.

The glass particles and glass frit prepared in the above examples 1 to 3 were subjected to glass transition temperature, glass softening temperature and thermal expansion coefficient tests, and the test results are shown in fig. 1 and table 1.

TABLE 1 Performance monitoring results in examples 1-3

Sample (I)	Glass transition temperature (. degree. C.)	Glass transition softening temperature (. degree. C.)	Coefficient of thermal expansion (/ deg.C)
				W1	460	545	96×10-7
W2	445	520	94×10-7
				W3	364	476	106.8×10-7
G1	476	554	98.7×10-7
				G2	470	549	97.4×10-7
G3	406	484	104×10-7
				Q1	465	550	89.3×10-7
Q2	463	542	84.3×10-7
				Q3	390	477	102×10-7

Note: the glass transition temperatures in the table were measured using a differential scanning thermal analyzer; the glass softening temperature and the coefficient of thermal expansion were measured by high temperature microscopy.

It is well known that optical fibers become brittle if exposed to high temperatures, and glass frits with lower softening temperatures are selected in view of the need to protect the optical fibers from damage as much as possible during the encapsulation process. Meanwhile, the thermal expansion coefficient of the 65 manganese steel of the packaging substrate is 15-16 multiplied by 10^-6The closer the thermal expansion coefficient is selected, the better bonding with the 65 manganese steel can be realized. As can be seen from fig. 1 and table 1, the graphene oxide modified lead diffusion glass powders W3, G3, and Q3 prepared in embodiments 1 to 3 of the present invention all have a low glass transition temperature and a suitable thermal expansion coefficient, and meet the application requirements of the packaged optical fiber and the 65 manganese steel material.

The glass preforms for the sealed optical fiber and the 65 mn steel are obtained by mixing the W1, the W2 and the W3 prepared in example 1 with an adhesive, performing compression molding by using a mold, placing the mixture in an oven at 60 ℃ for 5 hours, and then transferring the mixture to a high-temperature electric furnace for pre-sintering at 364 ℃ (glass transition temperature point) for 1 hour, wherein the heating rate of the high-temperature electric furnace is 5 ℃/min. The adhesive is an absolute ethyl alcohol solution containing 12% of paraffin, 7.5% of oleic acid and 5% of PVA by mass concentration. A single-mode optical fiber was inserted into the obtained glass preform, both ends were straightened and fixed, and the glass preform was heated by a high-frequency heating apparatus (sealing temperature 400 ℃) to be bonded to 65 Mn steel, the apparatus and the flow being as shown in FIG. 4. And selecting one end of the optical fiber to be connected into an optical sensing interrogator, observing the wavelength change of the optical fiber, and observing the bonding section of the preform and the 65 manganese steel by using a scanning electron microscope to reflect whether the bonding is good or not. Fig. 5(c) is a glass preform made using W3, and SEM characterization showed no gaps in the bonding, demonstrating good bonding. Fig. 5(a) (b) are glass preforms produced using W1 and W2 as raw materials, and SEM results show that a small amount of gaps exist, demonstrating that graphene oxide modification can improve adhesion between glass frit and 65 manganese steel. As shown in FIG. 6, the wavelength retention of the single-mode optical fiber encapsulated by the glass preform made of W3 was about 1.5nm after the processes of straightening, fixing, heating, cooling and the like, which proves that the preform successfully bonded the optical fiber to 65 Mn steel.

Meanwhile, the transmission spectrum power of the glass prefabricated blank packaged single-mode fiber prepared by adopting the W3 is tested to reflect the fiber transmission efficiency, and the change of the transmission spectrum power before and after packaging is recorded in the table 2. The specific test method comprises the following steps: the single mode fiber is connected with the light source emitting device through one end of the jumper wire, and the other end of the single mode fiber is connected with the optical power meter. The test results are shown in Table 2.

TABLE 2 optical power results obtained before and after encapsulation of W3

Sample (I)	Light source luminous power (mW)	Optical power meter (mW)	Optical fiber Transmission loss (%)
				W3	10	8	20
Solid glue	10	4.7	53

Note: the transmission spectral power was measured using an optical power meter.

As can be seen from Table 2, when a 10mW light source transmits to an optical power meter through a glass preform packaged single-mode optical fiber prepared from W3, the loss is nearly 2mW, the loss of the optical fiber is nearly 20%, and compared with the loss of a solid glue optical fiber, the loss of the optical fiber is about 50%, the transmission efficiency of the optical fiber is successfully improved.