Anti-ultraviolet radiation-resistant glass composition and preparation method thereof

Abstract

The invention discloses an anti-ultraviolet radiation-resistant glass composition and a preparation method thereof, and belongs to the technical field of glass. Comprising the following raw materials in percentage by mole: 62.3% to 70.6% of SiO2, 8.5% to 12.3% of Al2O3, 5.5% to 10.6% of K2O, 7.8% to 11.3% of Na2O, 2.4% to 4.5% of BaO, 0.2% to 0.4% of ZnO, 0.05% to 0.15% of ZrO2, 0.2% to 0.6% of CeO2 and 0.05% to 0.15% of SnO2. The prepared glass has excellent ultraviolet resistance, radiation resistance, transparency and uniformity through the design of the components and the optimal proportion of the components, and the defects of bubbles and stripes in the glass are reduced through the control of high-temperature melting, homogenization clarification, casting molding and annealing processes, so that the glass composition has the advantages of high transparency, high transparency and high transparency. The important application value is realized in the technical field of glass.

Description

Technical Field

[0001] The present invention belongs to the technical field of glass, and in particular, relates to an anti-ultraviolet and radiation-resistant glass composition and a preparation method thereof. Background Art

[0002] With the continuous development of modern science and technology, anti-ultraviolet and radiation-resistant glass has broad application prospects in many fields. In high-tech fields such as aerospace and deep space exploration, the performance requirements of glass materials are extremely high. Especially in outer space, spacecraft face challenges of extreme environments such as high-energy particle radiation and ultraviolet radiation. High-energy particles and ultraviolet rays can cause serious damage to glass materials, resulting in performance degradation or even failure.

[0003] When ordinary glass is exposed to high-energy particle radiation and ultraviolet rays, the internal structure of the glass will change, resulting in electronic defects and impurity atoms. The glass will become black and dark, resulting in a decrease in light transmittance, which cannot meet the requirements of extreme service environments such as deep space exploration. Therefore, there is an urgent need to invent an anti-UV and radiation-resistant glass to meet the higher demands in the field of glass technology. Summary of the invention

[0004] The purpose of the present invention is to overcome the defects of the prior art and provide an anti-ultraviolet radiation resistant glass composition and a preparation method thereof.

[0005] The purpose of the present invention can be achieved through the following technical solutions:

[0006] An anti-ultraviolet radiation-resistant glass composition comprises the following raw materials in molar percentage: SiO2: 62.3-70.6%, Al2O3: 8.5-12.3%, K2O: 5.5-10.6%, Na2O: 7.8-11.3%, BaO: 2.4-4.5%, ZnO: 0.2-0.4%, ZrO2: 0.05-0.15%, CeO2: 0.2-0.6%, SnO2: 0.05-0.15%.

[0007] As a preferred technical solution of the present invention, an anti-UV and radiation-resistant glass composition includes the following raw materials in molar percentage: SiO2: 62.5-69.6%, Al2O3: 9.5-11.0%, K2O: 5.5-9.8%, Na2O: 8.5-10.0%, BaO: 2.5-4.0%, ZnO: 0.2-0.3%, ZrO2: 0.08-0.15%, CeO2: 0.25-0.6%, SnO2: 0.05-0.15%.

[0008] Furthermore, the molar ratio of the raw materials satisfies the following conditions: 0.45≤Na2O / (K2O+Na2O)≤0.6; 0.7<CeO2 / (CeO2+SnO2)<0.9.

[0009] Furthermore, a method for preparing an anti-ultraviolet radiation-resistant glass composition comprises the following steps:

[0010] Step S1: mixing and stirring the raw materials to obtain uniformly mixed raw materials;

[0011] Step S2: melting the raw materials uniformly mixed in step S1 at high temperature, and after melting, stirring with a rod to remove bubbles, homogenizing and clarifying to obtain glass liquid;

[0012] Step S3: Cooling the glass liquid obtained in step S2, and then pouring it into a molding mold by a casting method to obtain a glass blank;

[0013] Step S4: annealing the glass blank in step S3 to obtain an annealed glass blank;

[0014] Step S5: cutting, grinding and polishing the glass blank annealed in step S4 to obtain an anti-ultraviolet and radiation-resistant glass composition.

[0015] Furthermore, the high temperature melting in step S2 includes the following steps:

[0016] A1. Add the mixed raw materials into a high-temperature furnace and heat them from room temperature at a rate of 10-15°C / min until the temperature reaches 800°C;

[0017] A2. Continue to heat the high temperature furnace at a rate of 5-10℃ / min until the temperature reaches 1400℃;

[0018] A3. Continue to heat the high temperature furnace at a rate of 3-5℃ / min until the temperature reaches 1580-1680℃ and melting is completed.

[0019] Furthermore, the clarification time in step S2 is 3-5 hours.

[0020] Furthermore, the cooling rate in step S3 is 2-4°C / min, down to 1400-1450°C.

[0021] Furthermore, the preheating temperature of the molding die in step S3 is 550°C.

[0022] Silicon dioxide is used as the glass-forming oxide. Silicon dioxide forms an irregular network structure with silicon-oxygen tetrahedron structural units, which becomes the skeleton of glass and can improve the radiation resistance, chemical stability and mechanical properties of glass.

[0023] Alumina is added to the raw materials. Alumina exists in the form of a network former and can enhance the densification of the glass structure.

[0024] Adding Na2O and K2O to the raw materials is the network external oxide of glass, which can reduce the melting point of glass, improve its process performance, and adjust the viscosity of glass to ensure the uniformity of the melting process;

[0025] The BaO added to the raw materials is an external body of the glass network structure. Among alkaline earth metal oxides, BaO has a relatively large molecular weight. Its introduction can increase the density of the glass. The increase in density helps to enhance the radiation resistance of the glass. A tighter structure can more effectively block the penetration of radiation.

[0026] ZnO added to the raw materials can improve the corrosion resistance of glass, and also help to increase the light transmittance and stability of glass;

[0027] ZrO2 added to the raw materials can significantly improve the hardness and chemical stability of glass and reduce the thermal expansion coefficient of glass; at the same time, ZrO2 has excellent ultraviolet absorption performance, which can effectively block the damage of ultraviolet rays to glass and improve the radiation resistance of glass;

[0028] The cerium dioxide added to the raw materials can not only serve as a high-temperature clarifier to improve the clarification effect of the glass, but also improve the ultraviolet absorption performance of the glass;

[0029] The tin oxide added to the raw materials can be used as a glass clarifier to help remove bubbles in the glass melt, improve the transparency and uniformity of the glass, and can work synergistically with cerium dioxide to greatly enhance the clarification effect. While the glass has excellent anti-ultraviolet absorption properties, it is easier to melt and clarify, and effectively reduces bubbles in the glass liquid.

[0030] Beneficial effects of the present invention:

[0031] The invention discloses an anti-ultraviolet and radiation-resistant glass composition. The glass prepared by the design of components and the optimized ratio of the components has excellent anti-ultraviolet absorption performance, radiation resistance, transparency and uniformity. In addition, the invention reduces the bubbles and streak defects in the glass through high-temperature melting, homogenization clarification, casting molding and annealing process control, so that the prepared glass has excellent finished product quality. Therefore, the invention has important application value in the field of glass technology. DETAILED DESCRIPTION

[0032] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] A method for preparing an anti-ultraviolet and radiation-resistant glass composition comprises the following steps:

[0034] Step S1: mixing and stirring the raw materials to obtain uniformly mixed raw materials;

[0035] Step S2: Melting the raw materials uniformly mixed in step S1 at high temperature. After melting, stirring with a rod to remove bubbles, homogenizing and clarifying for 3 hours to obtain glass liquid.

[0036] Step S3: cooling the glass liquid obtained in step S2 to 1400° C. at a rate of 2° C. / min, and then pouring the glass liquid into a molding mold preheated to 550° C. by a casting method to obtain a glass blank;

[0037] Step S4: annealing the glass blank in step S3 to obtain an annealed glass blank;

[0038] Step S5: cutting, grinding and polishing the glass blank annealed in step S4 to obtain an anti-ultraviolet and radiation-resistant glass composition;

[0039] Furthermore, the high temperature melting in step S2 includes the following steps:

[0040] A1. Add the mixed raw materials into a high-temperature furnace and heat them from room temperature at a rate of 10°C / min until the temperature reaches 800°C;

[0041] A2. Continue to heat the high temperature furnace at a rate of 5°C / min until the temperature reaches 1400°C;

[0042] A3. Continue to heat the high temperature furnace at a rate of 3°C / min until the temperature reaches 1620°C and melting is completed.

[0043] The molar percentages of the raw materials are as follows: SiO2: 62.3-70.6%, Al2O3: 8.5-12.3%, K2O: 5.5-10.6%, Na2O: 7.8-11.3%, BaO: 2.4-4.5%, ZnO: 0.2-0.4%, ZrO2: 0.05-0.15%, CeO2: 0.2-0.6%, SnO2: 0.05-0.15%; when preparing the examples, the raw materials used for the Na element are Na2SO4 and Na2CO3.

[0044] According to the above experimental steps, and by controlling the dosage of the raw materials, Examples 1-6 and Comparative Examples 1-6 were obtained. The dosages of Examples 1-6 and Comparative Examples 1-6 are shown in Table 1 and Table 2, respectively:

[0045] Table 1

[0046]

[0047] Table 2

[0048]

[0049]

[0050] The performance tests of Examples 1-6 and Comparative Examples 1-6 were carried out, and the results were shown in Table 3 and Table 4 respectively:

[0051] Table 3

[0052]

[0053] Table 4

[0054]

[0055]

[0056] It can be seen from Tables 3 and 4 that the transmittance at 330nm is the UV transmittance, and the smaller the value is, the better the anti-UV performance of the glass. Compared with the comparative example, the UV transmittance of the anti-UV and radiation-resistant glass provided by the present invention at 330nm is ≤0.03%, the optical transmittance at 400nm is ≥91%, and the optical transmittance at 450nm is ≥93%; the prepared glass has an A-level stripe degree and an A0-level bubble degree. It can be seen that the anti-UV and radiation-resistant glass composition and preparation method provided by the present invention not only have excellent anti-UV absorption performance, but also have excellent finished product quality. In summary, the present invention has important application value in the field of glass technology.

[0057] In the description of the specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0058] The above contents are merely examples and explanations of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the invention or exceed the scope defined by the claims, they shall all fall within the protection scope of the present invention.

Claims

1. An anti-ultraviolet radiation-resistant glass composition, characterized in that: The invention comprises the following raw materials in molar percentage: SiO2: 62.3-70.6%, Al2O3: 8.5-12.3%, K2O: 5.5-10.6%, Na2O: 7.8-11.3%, BaO: 2.4-4.5%, ZnO: 0.2-0.4%, ZrO2: 0.05-0.15%, CeO2: 0.2-0.6%, SnO2: 0.05-0.15%.

2. The UV-resistant and radiation-resistant glass composition according to claim 1, characterized in that: The molar ratio of the raw materials meets the following conditions: 0.45≤Na2O / (K2O+Na2O)≤0.6; 0.7<CeO2 / (CeO2+SnO2)<0.

9.

3. A method for preparing an anti-ultraviolet radiation-resistant glass composition according to any one of claims 1-2, characterized in that: The following steps are involved: Step S1: mixing and stirring the raw materials to obtain uniformly mixed raw materials; Step S2: melting the raw materials uniformly mixed in step S1 at high temperature, and after melting, stirring with a rod to remove bubbles, homogenizing and clarifying to obtain glass liquid; Step S3: Cooling the glass liquid obtained in step S2, and then pouring it into a molding mold by a casting method to obtain a glass blank; Step S4: annealing the glass blank in step S3 to obtain an annealed glass blank; Step S5: cutting, grinding and polishing the glass blank annealed in step S4 to obtain an anti-ultraviolet and radiation-resistant glass composition.

4. The method for preparing an anti-ultraviolet radiation-resistant glass composition according to claim 3, characterized in that: The high temperature melting in step S2 comprises the following steps: A1. Add the mixed raw materials into a high-temperature furnace and heat them from room temperature at a rate of 10-15°C / min until the temperature reaches 800°C; A2. Continue to heat the high temperature furnace at a rate of 5-10℃ / min until the temperature reaches 1400℃; A3. Continue to heat the high temperature furnace at a rate of 3-5℃ / min until the temperature reaches 1580-1680℃ and melting is completed.

5. The method for preparing an anti-ultraviolet radiation-resistant glass composition according to claim 3, characterized in that: The clarification time in step S2 is 3-5 h.

6. The method for preparing an anti-ultraviolet radiation-resistant glass composition according to claim 3, characterized in that: The cooling rate in step S3 is 2-4°C / min, down to 1400-1450°C.

7. The method for preparing a UV-resistant and radiation-resistant glass composition according to claim 3, characterized in that: The preheating temperature of the molding die in step S3 is 550°C.

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