A translucent fireproof glass, its preparation method and application

Abstract

The present invention relates to a translucent fireproof glass and its preparation method and application. In terms of molar percentage of oxides, the translucent fireproof glass contains 74.89 mol% to 75.29 mol% of SiO₂, 12.05 mol% to 12.44 mol% of Al₂O₃, 7.51 mol% to 10.53 mol% of Na₂O, 0 to 2.50 mol% of MgO, 0 mol% to 3.00 mol% of CaO, and 0.12 mol% to 0.20 mol% of CeO₂; and the sum of the molar percentages of Na₂O, MgO and CaO is not less than the molar percentage of Al₂O₃. The translucent fireproof glass prepared in this application not only has a translucent effect, but also has good fireproof performance.

Description

Technical Field

[0001] The present invention relates to the field of new glass materials, and particularly relates to a translucent fireproof glass and its preparation method and application. Background Art

[0002] With the rapid development of modern society, the urban population is increasing, and there are more and more residential and office buildings. Accordingly, partition walls are more and more widely used in today's living and office spaces. Compared with partition materials such as wood and light composite boards, glass partition walls have the characteristics of light transmittance and decoration. Among them, translucent glass partition walls play a certain role in protecting privacy while ensuring lighting. Therefore, such translucent glass partition walls are highly favored in the construction and decoration fields. At present, translucent glass partition materials mainly adopt pickling and sandblasting processes, that is, pickling and sandblasting treatment are carried out on transparent flat glass. At present, although the existing translucent glass partition walls have the above-mentioned light transmission and decoration effects, their fireproof function is poor. In case of a fire, the effects of smoke separation and heat insulation are poor, and it is difficult to effectively control the spread of fire.

[0003] At present, most of the glass with relatively good fireproof effects on the market is transparent, such as composite fireproof glass and microcrystalline fireproof glass.

[0004] Composite fireproof glass is made by sandwiching two pieces of ordinary glass, and "fireproof liquid" (such as water glass) is poured into the middle layer. The presence of the fireproof liquid will delay the softening and deformation of the glass. However, the weight per unit area of such composite fireproof glass products is relatively large, which is inconvenient for production and transportation. In addition, due to factors such as the viscosity and leveling property of the fireproof liquid itself, it is easy to form a thickness difference during the pouring process, resulting in an uneven surface of the formed fireproof layer. At the same time, air bubbles are likely to be generated in the fireproof layer of the existing composite fireproof glass, which will also reduce the actual fireproof effect of the fireproof layer.

[0005] Microcrystalline fireproof glass is prepared by first preparing a base glass, and then making the base glass precipitate high-melting-point crystals through crystallization treatment, and at the same time increasing the softening point of the remaining glass phase, so as to achieve the fireproof effect. However, the raw material cost of such glass is relatively high, and there is an uncontrollable "crystallization" risk during the preparation process of the base glass.

[0006] So far, there has been no report on a translucent fireproof glass with a relatively high softening point temperature and good fireproof performance. Summary of the Invention

[0007] In order to make up for the deficiencies of the prior art, the present invention provides a translucent fireproof glass and its preparation method and application.

[0008] The present invention is realized by the following technical solutions:

[0009] A translucent fireproof glass, in terms of molar percentage of oxides, contains 74.89 mol% - 75.29 mol% SiO2, 12.05 mol% - 12.44 mol% Al2O3, 7.51 mol% - 10.53 mol% Na2O, 0 - 2.50 mol% MgO, 0 mol% - 3.00 mol% CaO, 0.12 mol% - 0.20 mol% CeO2; and the sum of the molar percentages of Na2O, MgO and CaO is greater than the molar percentage of Al2O3.

[0010] Preferably, the content of SiO2 is 74.90 mol% - 75.15 mol%.

[0011] Preferably, the content of Al2O3 is 12.30 mol% - 12.44 mol%.

[0012] Preferably, the content of Na2O is 9.00 mol% - 10.00 mol%.

[0013] Preferably, the content of MgO is 1.30 mol% - 2.00 mol%.

[0014] Preferably, the content of CaO is 1.00 mol% - 2.00 mol%.

[0015] Preferably, the content of CeO2 is 0.15 mol% - 0.20 mol%.

[0016] A method for preparing a translucent fireproof glass, comprising the following steps:

[0017] S1: According to the above molar percentage composition of each oxide, accurately weigh each raw material, mix them evenly to form a batch material, and then melt and homogenize the batch material at 1650 °C - 1690 °C to obtain a glass melt;

[0018] S2: Obtain crushed glass blocks with a D90 particle size of 5.8 mm - 8.2 mm by water quenching the glass melt. At this time, there are no bubbles in the crushed glass blocks;

[0019] S3: Grind the crushed glass blocks, and obtain glass powder with a size of 200 mesh - 300 mesh after sieving;

[0020] S4: After drying the glass powder, press it into a shape to obtain a green body. The initial densification degree of the green body is 80% - 84%. The initial densification degree refers to the ratio of the density of the green body to the density of the crushed glass blocks obtained in step S2;

[0021] S5: Calcinate the green body at 1200 °C - 1250 °C for 1 hour - 1.5 hours, and then cool it to room temperature to obtain a primary glass product;

[0022] S6: Grind and polish the preliminary glass product to obtain the translucent fireproof glass; wherein, the densification degree of the translucent fireproof glass is 95% - 97%, and the densification degree of the translucent fireproof glass refers to the ratio of the density of the translucent fireproof glass to the density of the crushed glass blocks obtained in step S2.

[0023] Preferably, the method for preparing the translucent fireproof glass comprises the following steps:

[0024] S1: Accurately weigh each raw material according to the above-mentioned molar percentages of each oxide, mix them evenly to form a batch material, and then melt and homogenize the batch material in a high-temperature furnace at 1650°C - 1690°C to obtain a glass melt.

[0025] S2: Quench the glass melt obtained in step S1 with water to obtain crushed glass blocks with a D90 particle size of 5.8 mm - 8.2 mm.

[0026] S3: Ball-mill the crushed glass blocks obtained in step S2, and sieve them to obtain glass powder with a size of 200 mesh - 300 mesh.

[0027] S4: After drying the glass powder obtained in step S3, press it into a shape to obtain a green body with a thickness of 7 mm; wherein, the densification degree of the green body is 80% - 84%, and the densification degree of the green body refers to the ratio of the density of the green body to the density of the crushed glass blocks.

[0028] S5: Calcinate the green body obtained in step S4 in a shuttle kiln at 1200°C - 1250°C for 1 hour - 1.5 hours, and then cool it to room temperature with the furnace to obtain the preliminary glass product.

[0029] S6: Grind and polish the preliminary glass product obtained in step S5 to obtain the translucent fireproof glass; wherein, the densification degree of the translucent fireproof glass is 95% - 97%, and the densification degree of the translucent fireproof glass is the ratio of the density of the translucent fireproof glass to the density of the crushed glass blocks obtained in step S2.

[0030] Preferably, in step S1, the raw materials used are quartz sand, alumina, soda ash, magnesia, calcite, and cerium dioxide.

[0031] An application of a translucent fireproof glass in the fields of interior decoration, construction, or electronic devices.

[0032] Compared with the prior art, the beneficial technical effects of the present application are:

[0033] 1) The present invention aims to make specific settings through the selection of glass components and the compatibility relationship between the dosages of the components, so that the prepared glass has the characteristics of a high softening point temperature (up to 1150 °C at most) and a high densification degree (up to 97% at most), thereby improving the fire resistance of the glass; in addition, due to the specific settings of the selection of components and the compatibility relationship between the dosages of the components in this application, after the green body is calcined in step S5 of this application, a glass primary product with a semi-transparent effect can be obtained. This is mainly because during the calcination process of the green body, only surface crystallization occurs in the glass powder constituting the green body, and overall crystallization does not occur. Specifically, during the calcination process of the green body, a small amount of crystals will precipitate on the surface of the glass powder constituting the green body. On the one hand, it will not affect the calcination activity of the glass powder, and a high densification degree can still be obtained through viscous flow sintering. On the other hand, these small amounts of crystals will be wrapped inside the semi-transparent fireproof glass after the calcination and cooling processes, which is conducive to the scattering of visible light, thereby endowing it with a semi-transparent effect. It can be known from XRD detection that the crystallinity of the semi-transparent fireproof glass prepared in this application is between 4.6% and 5.6%.

[0034] 2) Since the surface of the glass primary product obtained in step S5 is relatively rough, therefore, the glass primary product is ground and polished in step S6 to obtain a semi-transparent fireproof glass with a smooth surface, thereby enabling the semi-transparent fireproof glass to have a good decorative effect;

[0035] 3) This type of semi-transparent fireproof glass prepared in this application can also play a protective role when an electronic device using this type of semi-transparent fireproof glass is used in a high-temperature environment;

[0036] 4) The specific settings of the selection of components and the compatibility relationship between the dosages of the components in this application are as follows: in the composition of the semi-transparent fireproof glass in this application, the molar percentage of Na2O + MgO + CaO is not less than the molar percentage of Al2O3. The special setting of the above components and their content relationships can effectively induce Al 3+ mainly exists in the form of [AlO4] coordination in the glass, and the tetrahedron of four-coordinated [AlO4] can be connected with the [SiO4] tetrahedron to jointly form a glass network structure. Therefore, this application endows the semi-transparent fireproof glass with a relatively high viscosity and a relatively high softening point temperature (the corresponding viscosity is about 10 7.6Poisson), thereby endowing the translucent fireproof glass in the present application with excellent fireproof performance; in addition, in the present application, SiO2 is a network-forming oxide and is the main component of the glass. If SiO2 is less than 74.89 mol%, the glass viscosity is low and there is a tendency to soften when the temperature reaches 1100 °C. If it exceeds 75.29 mol%, the glass is difficult to melt. Therefore, it is preferable to select the molar percentage of SiO2 to be 74.89 mol% to 75.29 mol%; Al2O3 is an intermediate oxide of the glass. Al 3+ exists in coordination numbers such as 4, 5, and 6 in the glass. An appropriate amount of Al 3+ content is conducive to its mainly existing in the form of 4 coordination. If Al2O3 is less than 12.05 mol%, the glass viscosity is low. If it exceeds 12.44 mol%, the glass is difficult to melt. Therefore, it is preferable to select the molar percentage of Al2O3 to be 12.05 mol% to 12.44 mol%; Na2O is used to lower the glass melting temperature and at the same time acts as an electric charge balancing ion to promote Al in the glass 3+ to exist in the form of [AlO4] tetracoordination. If Na2O is less than 7.51 mol%, the glass viscosity is too high and it is difficult to melt. If Na2O is higher than 10.53 mol%, the glass has a tendency to soften and deform at high temperatures. Therefore, it is preferable to select the molar percentage of Na2O to be 7.51 mol% to 10.53 mol%; MgO is used to lower the glass melting temperature and at the same time plays a role in promoting surface crystallization, thereby promoting light scattering. However, if MgO is higher than 2.50 mol%, during the calcination process of the glass powder, the crystallization tendency is serious and it is not conducive to sintering densification. Therefore, it is preferable to select the molar percentage of MgO to be 0 to 2.50 mol%; CaO can lower the glass melting temperature and promote surface crystallization, which is beneficial to translucency. However, if CaO is higher than 3.00 mol%, the densification degree will be reduced due to uncontrollable crystallization during the calcination process. Therefore, it is preferable to select the molar percentage of CaO to be 0 to 3.00 mol%; CeO2 plays a role in clarifying during the glass melting process and is beneficial to the discharge of bubbles in the glass melt. If CeO2 is less than 0.12 mol%, the clarification time is longer. If CeO2 is higher than 0.20 mol%, the clarification effect will no longer be enhanced. Therefore, it is preferable to select the molar percentage of CeO2 to be 0.12 mol% to 0.20 mol%.

[0037] In summary, through the selection of components and the special setting of the compatibility relationship between the component dosages in the present application, the present application not only has a translucent effect, but also will not affect the densification degree of the translucent fireproof glass due to excessive crystal precipitation of the glass powder constituting the green body during calcination, thereby damaging the fireproof performance of the glass; moreover, the translucent fireproof glass in the present application does not use expensive raw materials during the preparation process. Therefore, the translucent fireproof glass in the present application also has the advantages of low cost and easy availability of raw materials. Brief Description of the Drawings

[0038] Figure 1 It is a thermal analysis curve graph of the crushed glass block detection sample prepared in the first embodiment and the glass powder obtained in step S3;

[0039] Figure 2 It is an X-ray diffraction pattern of the translucent fireproof glass powder detection sample prepared in the first embodiment;

[0040] Figure 3 It is a thermal analysis curve graph of the crushed glass block detection sample prepared in the second embodiment and the glass powder obtained in step S3;

[0041] Figure 4 It is an X-ray diffraction pattern of the translucent fireproof glass powder detection sample prepared in the second embodiment;

[0042] Figure 5 It is a thermal analysis curve graph of the crushed glass block detection sample prepared in the third embodiment and the glass powder obtained in step S3;

[0043] Figure 6 It is an X-ray diffraction pattern of the translucent fireproof glass powder detection sample prepared in the third embodiment;

[0044] Figure 7 It is a thermal analysis curve graph of the crushed glass block detection sample prepared in the fourth embodiment and the glass powder obtained in step S3;

[0045] Figure 8 It is an X-ray diffraction pattern of the translucent fireproof glass powder detection sample prepared in the fourth embodiment;

[0046] Figure 9 It is a thermal analysis curve graph of the crushed glass block detection sample prepared in the fifth embodiment and the glass powder obtained in step S3;

[0047] Figure 10 It is an X-ray diffraction pattern of the translucent fireproof glass powder detection sample prepared in the fifth embodiment;

[0048] Figure 11 It is a thermal analysis curve graph of the crushed glass block detection sample prepared in the sixth embodiment and the glass powder obtained in step S3;

[0049] Figure 12 It is an X-ray diffraction pattern of the translucent fireproof glass powder detection sample prepared in the sixth embodiment. Detailed Description of the Invention

[0050] The following further illustrates a semi-transparent fireproof glass of the present invention through specific embodiments, where Embodiment 5 is the best embodiment. The composition table (mol%) and related parameters of the semi-transparent fireproof glass of Embodiments 1 to 6 are shown in Table 1 as follows:

[0051] Table 1

[0052]

[0053] Embodiment 1:

[0054] A semi-transparent fireproof glass is prepared by the following semi-transparent fireproof glass preparation method. The semi-transparent fireproof glass preparation method includes the following steps:

[0055] S1: According to the oxide molar percentage composition of Embodiment 1 shown in Table 1, accurately weigh the following raw materials in parts by weight: 69.87 parts of quartz sand, 18.97 parts of alumina, 17.34 parts of soda ash, 1.27 parts of magnesium oxide, and 0.32 parts of cerium dioxide. Then, mix the above raw materials evenly to form a batch material, and then melt and homogenize the batch material at 1690°C to obtain a glass melt;

[0056] S2: Quench the glass melt obtained in step S1 with water to obtain crushed glass blocks with a D90 particle size of 5.8 mm;

[0057] S3: Grind the crushed glass blocks obtained in step S2, and sieve to obtain glass powder with a size of 200 mesh to 300 mesh;

[0058] S4: Dry the glass powder obtained in step S3, and then press it into a green body with a thickness of 7 mm. The densification degree of the green body is shown in Table 1;

[0059] S5: Calcinate the green body obtained in step S4 in a shuttle kiln at 1250°C for 1.5 hours, and then cool it to room temperature with the furnace to obtain a glass primary product. In this step S5, during the calcination of the green body, a small amount of crystals will precipitate on the surface of the glass powder constituting the green body, and overall crystallization will not occur. Specifically, during the calcination of the green body, a small amount of crystals will precipitate on the surface of the glass powder constituting the green body. On the one hand, it will not affect the calcination activity of the glass powder, and a high densification degree can still be obtained through viscous flow sintering. On the other hand, after cooling with the furnace, these small crystals will be wrapped inside the glass primary product, and the existence of the above small crystals will be conducive to the scattering of visible light, thereby endowing the glass primary product with a semi-transparent effect;

[0060] S6: After grinding and polishing the initial glass product obtained in step S5, semi-transparent fireproof glass is obtained. The thickness of the transparent fireproof glass is 5.0 mm, and the densification degree of the semi-transparent fireproof glass is shown in Table 1. In this step S6, grinding and polishing the initial glass product is only used to improve the surface roughness of the initial glass product and will not affect the internal structure of the initial glass product. That is to say, the initial glass product with a semi-transparent effect will become semi-transparent fireproof glass with a semi-transparent effect after grinding and polishing.

[0061] The crushed glass blocks obtained in step S2 of Example 1 are ground into cylindrical crushed glass block test samples with a diameter of 4.0 mm and a height of 2.0 mm, and then thermal analysis tests (heating rate: 20 °C / minute) are respectively carried out on the crushed glass block test samples and the glass powder obtained in step S3. The test results are as Figure 1 shown; then, 2 g of the semi-transparent fireproof glass obtained in step S6 is taken and ground to obtain a semi-transparent fireproof glass powder test sample, and an XRD test is carried out on the semi-transparent fireproof glass powder test sample. The test results are as Figure 2 shown; then, the softening point temperature of the 5.0-mm-thick semi-transparent fireproof glass prepared in step S6 of this application is tested, and the test results are shown in Table 1;

[0062] From Figure 1 it can be seen that no crystallization peak appears in the DSC thermal analysis curve of the crushed glass block test sample prepared in Example 1. On the contrary, there is an obvious crystallization peak in the DSC thermal analysis curve of the glass powder obtained in step S3. Therefore, the difference in the crystallization behavior of the crushed glass block test sample and the glass powder obtained in step S3 during the thermal analysis indicates that surface crystallization of the powder body occurs during the calcination of the semi-transparent fireproof glass body prepared in this application, rather than overall crystallization. The reason is that compared with massive glass, the particle size of powdered glass is smaller. Therefore, powdered glass has more active nucleation sites and thus has a relatively high crystal content.

[0063] From Figure 2 it can be seen that Figure 2 there are diffuse "bun" peaks in the diffraction peaks, and moreover, Figure 2 there are also relatively sharp diffraction peaks in the diffraction peaks, which indicates that the semi-transparent fireproof glass prepared in Example 1 is composed of a large amount of amorphous glass phase and a small amount of crystals. From Figure 2It is also known that the crystal is a SiO2 crystal. In addition, it can be known through calculation by XRD software that the crystallinity of the translucent fireproof glass prepared in Example 1 is 5.6%. The existence of these small amounts of crystals in the translucent fireproof glass is conducive to light scattering, thereby enabling the translucent fireproof glass prepared in Example 1 to obtain a translucent effect. In addition, through detection and calculation, it is known that the densification degree of the translucent fireproof glass prepared in Example 1 has reached 95% (which can be seen from Table 1), indicating that the densification degree of the translucent fireproof glass prepared in Example 1 is relatively good.

[0064] In addition, it can also be seen from Table 1 that the softening point temperature of the translucent fireproof glass prepared in Example 1 has reached 1148 °C, indicating that the fireproof performance of the translucent fireproof glass prepared in Example 1 is also relatively good; in order to verify the fireproof performance of the translucent fireproof glass prepared in Example 1 of this application, this application also conducts a fire resistance test in accordance with Standard GB / T 15763.1-2009. The test shows that after 240 minutes, the translucent fireproof glass with a thickness of 5.0 mm still remains intact.

[0065] Example 2:

[0066] A translucent fireproof glass is prepared by the following method for preparing a translucent fireproof glass, and the method for preparing a translucent fireproof glass includes the following steps:

[0067] S1: According to the oxide molar percentage composition of Example 2 shown in Table 1, accurately weigh the following parts by weight of raw materials: 69.31 parts of quartz sand, 19.13 parts of alumina, 15.56 parts of soda ash, 4.64 parts of calcite, and 0.43 parts of cerium dioxide; then, mix the above raw materials evenly to form a batch material, and then melt and homogenize the batch material at 1680 °C to obtain a glass melt;

[0068] S2: Quench the glass melt obtained in step S1 with water to obtain crushed glass blocks with a D90 particle size of 7.3 mm;

[0069] S3: Grind the crushed glass blocks obtained in step S2, and sieve to obtain glass powder with a size of 200 mesh to 300 mesh;

[0070] S4: Dry the glass powder obtained in step S3, and then press and mold it to obtain a green body with a thickness of 7 mm. The densification degree of the green body is shown in Table 1;

[0071] S5: After calcining the green body obtained in step S4 in a shuttle kiln at 1250 °C for 1.0 hour, it is cooled to room temperature with the furnace to obtain a primary glass product. In this step S5, during the calcination of the green body, a small amount of crystals will precipitate on the surface of the glass powder that makes up the green body, and there will be no overall crystallization. Specifically, during the calcination of the green body, a small amount of crystals will precipitate on the surface of the glass powder that makes up the green body. On the one hand, it will not affect the calcination activity of the glass powder, and a relatively high densification degree can still be obtained through viscous flow sintering. On the other hand, after cooling with the furnace, these small crystals will be wrapped inside the primary glass product, and the existence of the above-mentioned small amount of crystals will be conducive to the scattering of visible light, thereby imparting a translucent effect to the primary glass product;

[0072] S6: After grinding and polishing the primary glass product obtained in step S5, a translucent fireproof glass is obtained. The thickness of the transparent fireproof glass is 5.0 mm, and the densification degree of the translucent fireproof glass is shown in Table 1. In this step S6, grinding and polishing the primary glass product is only used to improve the surface roughness of the primary glass product and will not affect the internal structure of the primary glass product. That is to say, the primary glass product with a translucent effect will become a translucent fireproof glass with a translucent effect after grinding and polishing.

[0073] The crushed glass blocks obtained in step S2 of Example 2 are ground into cylindrical crushed glass block test samples with a diameter of 4.0 mm and a height of 2.0 mm, and then thermal analysis tests (heating rate: 20 °C / minute) are respectively carried out on the crushed glass block test samples and the glass powder obtained in step S3. The test results are as Figure 3 shown; then, 2 g of the translucent fireproof glass obtained in step S6 is taken and ground to obtain a powdered test sample of the translucent fireproof glass, and an XRD test is carried out on the powdered test sample of the translucent fireproof glass. The test results are as Figure 4 shown; then, the softening point temperature of the 5.0-mm-thick translucent fireproof glass prepared in step S6 of this application is tested. The test results are shown in Table 1;

[0074] It can be seen from Figure 3 that there is no crystallization peak in the DSC thermal analysis curve of the crushed glass block test sample prepared in Example 2. On the contrary, there is an obvious crystallization peak in the DSC thermal analysis curve of the glass powder obtained in step S3 of Example 2. Therefore, the difference in the crystallization behavior of the crushed glass block test sample and the glass powder obtained in step S3 during the thermal analysis indicates that the surface crystallization of the powder is likely to occur during the calcination of the translucent fireproof glass green body prepared in this application, rather than the overall crystallization of the powder. The reason is that compared with bulk glass, the particle size of powdered glass is smaller, so it has more activated nucleation sites and thus a relatively high crystal content.

[0075] It can be seen fromFigure 4 It can be seen from Figure 4 that there are diffused "bun-shaped" peaks in the diffraction peaks of Figure 4 , and there are also relatively sharp diffraction peaks in the diffraction peaks of Figure 4 . This indicates that the translucent fireproof glass prepared in Example 2 is composed of a large amount of amorphous glass phase and a small amount of crystals. It can also be known from

[0076] that the crystal is CaAl2Si2O8 crystal, and it can also be known through calculation by XRD software that the crystallinity of the translucent fireproof glass prepared in Example 2 is 4.6%. The existence of these small amounts of crystals is beneficial to light scattering, thereby enabling the translucent fireproof glass prepared in Example 2 to obtain a translucent effect. In addition, through detection and calculation, it is known that the densification degree of the translucent fireproof glass prepared in Example 2 has reached 96% (which can be seen from Table 1), indicating that the densification degree of the translucent fireproof glass prepared in Example 2 is relatively good.

[0077] Example 3:

[0078] A translucent fireproof glass is prepared by the following method for preparing a translucent fireproof glass, and the method for preparing a translucent fireproof glass includes the following steps:

[0079] S1: According to the oxide molar percentage composition of Example 3 shown in Table 1, accurately weigh the following parts by weight of raw materials: 69.75 parts of quartz sand, 19.41 parts of alumina, 12.36 parts of soda ash, 1.58 parts of magnesia, 3.89 parts of calcite, and 0.43 parts of cerium dioxide; then, mix the above raw materials evenly to form a batch, and then melt and homogenize the batch at 1670°C to obtain a glass melt;

[0080] S2: Quench the glass melt obtained in step S1 with water to obtain crushed glass blocks with a D90 particle size of 8.1 mm;

[0081] S3: Grind the crushed glass blocks obtained in step S2, and sieve to obtain glass powder with a size of 200 mesh to 300 mesh;

[0082] S4: After drying the glass powder obtained in step S3, perform pressing to obtain a green body with a thickness of 7 mm, and the densification degree of the green body is shown in Table 1;

[0083] S5: After calcining the green body obtained in step S4 in a shuttle kiln at 1200 °C for 1.0 hour, it is cooled to room temperature with the furnace to obtain the primary glass product. In this step S5, when calcining the green body, a small amount of crystals will precipitate on the surface of the glass powder that makes up the green body, and there will be no overall crystallization. Specifically, during the calcination process of the green body, a small amount of crystals will precipitate on the surface of the glass powder that makes up the green body. On the one hand, it will not affect the calcination activity of the glass powder, and a relatively high densification degree can still be obtained through viscous flow sintering. On the other hand, after cooling with the furnace, these small crystals will be wrapped inside the primary glass product, and the existence of these small crystals will be conducive to the scattering of visible light, thereby endowing the primary glass product with a translucent effect;

[0084] S6: After grinding and polishing the primary glass product obtained in step S5, the translucent fireproof glass is obtained. The thickness of the translucent fireproof glass is 5.0 mm, and the densification degree of the translucent fireproof glass is 97%. In this step S6, grinding and polishing the primary glass product is only used to improve the surface roughness of the primary glass product and will not affect the internal structure of the primary glass product. That is to say, the primary glass product with a translucent effect will become a translucent fireproof glass with a translucent effect after grinding and polishing.

[0085] The crushed glass blocks obtained in step S2 of Example 3 are ground into cylindrical crushed glass block test samples with a diameter of 4.0 mm and a height of 2.0 mm, and then thermal analysis tests (heating rate: 20 °C / minute) are respectively carried out on the crushed glass block test samples and the glass powder obtained in step S3. The test results are as Figure 5 shown; then, 2 g of the translucent fireproof glass obtained in step S6 is taken and ground to obtain a powdered test sample of the translucent fireproof glass, and an XRD test is carried out on the powdered test sample of the translucent fireproof glass. The test results are as Figure 6 shown; then, the present application also tests the softening point temperature of the 5.0-mm-thick translucent fireproof glass prepared in step S6. The test results are shown in Table 1;

[0086] It can be seen from Figure 5 that there is no crystallization peak in the DSC thermal analysis curve of the crushed glass block test sample prepared in Example 3. On the contrary, there is an obvious crystallization peak in the DSC thermal analysis curve of the glass powder obtained in step S3 of Example 3. Therefore, the difference in the crystallization behavior between the crushed glass block test sample and the glass powder obtained in step S3 during the thermal analysis indicates that the prepared translucent fireproof glass green body in the present application is prone to surface crystallization of the powder during calcination, rather than overall crystallization of the powder. The reason is that compared with block glass, the particle size of powdered glass is smaller, so it has more activated nucleation sites and thus has a relatively high crystal content.

[0087] From Figure 6 It can also be seen that Figure 6 there are diffused "bun-shaped" peaks in the diffraction peaks of Figure 6 and there are also relatively sharp diffraction peaks in the diffraction peaks of Figure 6 which indicates that the translucent fireproof glass prepared in Example 3 is composed of a large amount of amorphous glass phase and a small amount of crystals. It can also be known from Figure 6 that the above-mentioned crystals include SiO2 crystals and CaAl2Si2O8 crystals. In addition, it can also be known through calculation by XRD software that the crystallinity of the translucent fireproof glass prepared in Example 3 is 4.9%. The existence of these small amounts of crystals is conducive to light scattering, thereby enabling the translucent fireproof glass prepared in Example 3 to obtain a translucent effect. In addition, through detection and calculation, it is known that the densification degree of the translucent fireproof glass prepared in Example 3 has reached 97% (which can be seen from Table 1), indicating that the densification degree of the translucent fireproof glass prepared in Example 3 is better.

[0088] In addition, it can also be seen from Table 1 that the softening point temperature of the translucent fireproof glass prepared in Example 3 has reached 1135 °C, indicating that the fireproof performance of the translucent fireproof glass prepared in Example 3 is also better; in order to verify the fireproof performance of the translucent fireproof glass prepared in Example 3, this application also conducts a fire resistance test in accordance with Standard GB / T15763.1-2009. The test shows that after 240 minutes, the 5.0-mm-thick translucent fireproof glass still remains intact.

[0089] Example 4:

[0090] A translucent fireproof glass is prepared by the following method for preparing a translucent fireproof glass, and the method for preparing a translucent fireproof glass includes the following steps:

[0091] S1: According to the oxide molar percentage composition of Example 4 shown in Table 1, accurately weigh the following parts by weight of raw materials: 69.27 parts of quartz sand, 19.43 parts of alumina, 13.59 parts of soda ash, 0.79 part of magnesium oxide, 4.64 parts of calcite, and 0.53 part of cerium dioxide; then, mix the above-mentioned raw materials evenly to form a batch material, and then melt and homogenize the batch material at 1650 °C to obtain a glass melt;

[0092] S2: Quench the glass melt obtained in step S1 with water to obtain crushed glass blocks with a D90 particle size of 7.8 mm;

[0093] S3: Grind the crushed glass blocks obtained in step S2, and sieve to obtain glass powder with a size of 200 mesh to 300 mesh;

[0094] S4: After drying the glass powder obtained in step S3, press it into a shape to obtain a green body with a thickness of 7 mm, and the densification degree of the green body is shown in Table 1;

[0095] S5: After calcining the green body obtained in step S4 in a shuttle kiln at 1220 °C for 1.0 hour, it is cooled to room temperature with the furnace to obtain a primary glass product. In this step S5, during the calcination of the green body, a small amount of crystals will precipitate on the surface of the glass powder that makes up the green body, and there will be no overall crystallization. Specifically, during the calcination of the green body, a small amount of crystals will precipitate on the surface of the glass powder that makes up the green body. On the one hand, it will not affect the calcination activity of the glass powder body, and a relatively high densification degree can still be obtained through viscous flow sintering. On the other hand, after cooling with the furnace, these small crystals will be wrapped inside the primary glass product, and the existence of the above-mentioned small amount of crystals will be conducive to the scattering of visible light, thereby endowing the primary glass product with a translucent effect;

[0096] S6: After grinding and polishing the primary glass product obtained in step S5, a translucent fireproof glass is obtained. The thickness of the translucent fireproof glass is 5.0 mm, and the densification degree of the translucent fireproof glass is 96%. In this step S6, grinding and polishing the primary glass product is only used to improve the surface roughness of the primary glass product and will not affect the internal structure of the primary glass product. That is to say, the primary glass product with a translucent effect will become a translucent fireproof glass with a translucent effect after grinding and polishing.

[0097] The crushed glass blocks obtained in step S2 of Example 4 are ground into a cylindrical crushed glass block test sample with a diameter of 4.0 mm and a height of 2.0 mm, and then thermal analysis tests (heating rate: 20 °C / minute) are respectively carried out on the crushed glass block test sample and the glass powder obtained in step S3. The test results are as Figure 7 shown; then, 2 g of the translucent fireproof glass obtained in step S6 is taken and ground to obtain a powdered test sample of the translucent fireproof glass, and an XRD test is carried out on the powdered test sample of the translucent fireproof glass. The test results are as Figure 8 shown; then, the softening point temperature of the 5.0-mm-thick translucent fireproof glass prepared in step S6 of this application is tested. The test results are shown in Table 1;

[0098] From Figure 7 it can be seen that there is no crystallization peak in the DSC thermal analysis curve of the crushed glass block test sample prepared in Example 4. On the contrary, there is an obvious crystallization peak in the DSC thermal analysis curve of the glass powder obtained in step S3 of Example 4. Therefore, the difference in the crystallization behavior of the crushed glass block test sample and the glass powder obtained in step S3 during the thermal analysis indicates that the translucent fireproof glass green body prepared in this application is prone to surface crystallization of the powder during calcination, rather than overall crystallization of the powder. The reason is that compared with bulk glass, the particle size of powdered glass is smaller, so there are more activated nucleation positions and relatively high crystal content.

[0099] It can be seen from Figure 8 that there are diffused "bread-like" peaks in the diffraction peaks of Figure 8 , and moreover, there are also relatively sharp diffraction peaks in the diffraction peaks of Figure 8 . This indicates that the semi-transparent fireproof glass prepared in Example 4 is composed of a large amount of amorphous glass phase and a small amount of crystals. It can also be known from Figure 8 that the crystals include SiO2 crystals and CaAl2Si2O8 crystals, and through calculation by XRD software, the crystallinity of the semi-transparent fireproof glass prepared in Example 4 is 5.2%. The existence of these small amounts of crystals is beneficial to light scattering, thereby enabling the semi-transparent fireproof glass prepared in Example 4 to obtain a semi-transparent effect. In addition, through detection and calculation, it is known that the densification degree of the semi-transparent fireproof glass prepared in Example 4 has reached 96% (which can be seen from Table 1), indicating that the densification degree of the semi-transparent fireproof glass prepared in Example 4 is relatively good.

[0100] In addition, it can be seen from Table 1 that the softening point temperature of the semi-transparent fireproof glass prepared in Example 4 has reached 1137 °C, indicating that the fireproof performance of the semi-transparent fireproof glass prepared in Example 4 is also relatively good; in order to verify the fireproof performance of the semi-transparent fireproof glass prepared in Example 4, this application also conducts a fire resistance test in accordance with the standard GB / T15763.1-2009. The test shows that after 240 minutes, the semi-transparent fireproof glass with a thickness of 5.0 mm still remains intact.

[0101] Example 5:

[0102] A semi-transparent fireproof glass is prepared by the following semi-transparent fireproof glass preparation method, and the semi-transparent fireproof glass preparation method includes the following steps:

[0103] S1: According to the oxide molar percentage composition of Example 5 shown in Table 1, accurately weigh the following parts by weight of raw materials: 69.26 parts of quartz sand, 19.51 parts of alumina, 15.91 parts of soda ash, 0.94 parts of magnesium oxide, 1.93 parts of calcite, and 0.48 parts of cerium dioxide; then, mix the above raw materials evenly to form a batch material, and then melt and homogenize the batch material at 1685 °C to obtain a glass melt;

[0104] S2: Quench the glass melt obtained in step S1 with water to obtain crushed glass blocks with a D90 particle size of 8.2 mm;

[0105] S3: Grind the crushed glass blocks obtained in step S2, and sieve them to obtain glass powder with a size of 200 mesh to 300 mesh;

[0106] S4: After drying the glass powder obtained in step S3, it is pressed into a blank with a thickness of 7 mm, and the densification degree of the blank is 88%;

[0107] S5: After calcining the blank obtained in step S4 in a shuttle kiln at 1240 °C for 1.5 hours, it is cooled to room temperature with the furnace to obtain a glass primary product; in this step S5, during the calcination of the blank, a small amount of crystals will precipitate on the surface of the glass powder that makes up the blank, and there will be no overall crystallization. Specifically, during the calcination of the blank, a small amount of crystals will precipitate on the surface of the glass powder that makes up the blank. On the one hand, it will not affect the calcination activity of the glass powder body, and a relatively high densification degree can still be obtained through viscous flow sintering. On the other hand, after cooling with the furnace, these small crystals will be wrapped inside the glass primary product, and the existence of these small crystals will be conducive to the scattering of visible light, thereby giving the glass primary product a translucent effect;

[0108] S6: After grinding and polishing the glass primary product obtained in step S5, a translucent fireproof glass is obtained. The thickness of the translucent fireproof glass is 5.0 mm, and the densification degree of the translucent fireproof glass is 97%. In this step S6, grinding and polishing the glass primary product is only used to improve the surface roughness of the glass primary product and will not affect the internal structure of the glass primary product. That is to say, the glass primary product with a translucent effect will become a translucent fireproof glass with a translucent effect after grinding and polishing.

[0109] The crushed glass blocks obtained in step S2 of Example 5 are ground into cylindrical crushed glass block test samples with a diameter of 4.0 mm and a height of 2.0 mm, and then thermal analysis tests (heating rate: 20 °C / min) are carried out on the crushed glass block test samples and the glass powder obtained in step S3 respectively. The test results are as Figure 9 shown; then, 2 g of the translucent fireproof glass obtained in step S6 is taken and ground to obtain a powdered test sample of the translucent fireproof glass, and an XRD test is carried out on the powdered test sample of the translucent fireproof glass obtained in step S6. The test results are as Figure 10 shown; then, this application also tests the softening point temperature of the 5.0-mm-thick translucent fireproof glass prepared in step S6. The test results are shown in Table 1;

[0110] From Figure 9It can be seen that there is no crystallization peak in the DSC thermal analysis curve of the crushed glass block detection sample prepared in Example 5. On the contrary, there is an obvious crystallization peak in the DSC thermal analysis curve of the glass powder obtained in step S3 of Example 5. Therefore, the difference in the crystallization behavior during the thermal analysis between the crushed glass block detection sample and the glass powder obtained in step S3 indicates that the translucent fireproof glass body prepared in this application is prone to surface crystallization of the powder during calcination, rather than overall crystallization of the powder. The reason is that compared with massive glass, the particle size of powdered glass is smaller, so there are more activated nucleation positions, and thus a relatively high crystal content.

[0111] From Figure 10 it can also be seen that Figure 10 there is a diffuse "bread-shaped" peak in the diffraction peak of Figure 10 and there are also relatively sharp diffraction peaks in the diffraction peak of Figure 10 This indicates that the translucent fireproof glass prepared in Example 5 is composed of a large amount of amorphous glass phase and a small amount of crystals. It can also be known from Figure 10 that the crystals include SiO2 crystals and CaAl2Si2O8 crystals, and through calculation by XRD software, the crystallinity of the translucent fireproof glass prepared in Example 5 is 5.4%. The existence of these small amounts of crystals is conducive to light scattering, thereby enabling the translucent fireproof glass prepared in Example 5 to obtain a translucent effect. In addition, through detection and calculation, it is known that the densification degree of the translucent fireproof glass prepared in Example 5 has reached 97% (which can be seen from Table 1), indicating that the densification degree of the translucent fireproof glass prepared in Example 5 is relatively good.

[0112] In addition, it can be seen from Table 1 that the softening point temperature of the translucent fireproof glass prepared in Example 5 has reached 1150 °C, indicating that the fireproof performance of the translucent fireproof glass prepared in Example 5 is also relatively good; in order to verify the fireproof performance of the translucent fireproof glass prepared in Example 5, this application also conducts a fire resistance test in accordance with Standard GB / T15763.1-2009. The test shows that after 240 minutes, the 5.0 mm thick translucent fireproof glass still remains intact.

[0113] Example 6:

[0114] A translucent fireproof glass is prepared by the following method for preparing a translucent fireproof glass, and the method for preparing a translucent fireproof glass includes the following steps:

[0115] S1: Weigh accurately the following raw materials in parts by weight according to the oxide molar percentage composition of Example 6 shown in Table 1: 69.54 parts of quartz sand, 19.43 parts of alumina, 13.97 parts of soda ash, 1.26 parts of magnesia, 3.10 parts of calcite, and 0.43 parts of cerium dioxide. Then, mix the above raw materials evenly to form a batch material, and then melt and homogenize the batch material at 1670 °C to obtain a glass melt.

[0116] S2: Quench the glass melt obtained in step S1 with water to obtain crushed glass blocks with a D90 particle size of 6.5 mm.

[0117] S3: Grind the crushed glass blocks obtained in step S2, and after sieving, obtain glass powder with a size of 200 mesh to 300 mesh.

[0118] S4: After drying the glass powder obtained in step S3, press and form it to obtain a green body with a thickness of 7 mm. The densification degree of the green body is shown in Table 1.

[0119] S5: Calcinate the green body obtained in step S4 in a shuttle kiln at 1230 °C for 1.5 hours, and then cool it to room temperature with the furnace to obtain a preliminary glass product. In this step S5, when calcining the green body, a small amount of crystals will precipitate on the surface of the glass powder that makes up the green body, and there will be no overall crystallization. Specifically, during the calcination process of the green body, a small amount of crystals will precipitate on the surface of the glass powder that makes up the green body. On the one hand, it will not affect the calcination activity of the glass powder, and a relatively high densification degree can still be obtained through viscous flow sintering. On the other hand, after cooling with the furnace, these small crystals will be wrapped inside the preliminary glass product, and the existence of the above-mentioned small crystals will be conducive to the scattering of visible light, thereby giving the preliminary glass product a translucent effect.

[0120] S6: After grinding and polishing the preliminary glass product obtained in step S5, a translucent fireproof glass is obtained. The thickness of the translucent fireproof glass is 5.0 mm, and the densification degree of the translucent fireproof glass is 95%. In this step S6, grinding and polishing the preliminary glass product is only used to improve the surface roughness of the preliminary glass product and will not affect the internal structure of the preliminary glass product. That is to say, the preliminary glass product with a translucent effect will become a translucent fireproof glass with a translucent effect after grinding and polishing.

[0121] Grind the crushed glass blocks obtained in step S2 of Example 6 into cylindrical crushed glass block test samples with a diameter of 4.0 mm and a height of 2.0 mm, and then perform thermal analysis tests (heating rate: 20 °C / minute) on the crushed glass block test samples and the glass powder obtained in step S3 respectively. The test results are as Figure 11Then, take 2g of the translucent fireproof glass obtained in step S6 and grind it to obtain a translucent fireproof glass powder test sample, and perform XRD test on the translucent fireproof glass powder test sample obtained in step S6. The test results are as follows Figure 12 Then the present application tested the softening point temperature of the translucent fireproof glass with a thickness of 5.0 mm prepared in step S6, and the test results are shown in Table 1;

[0122] from Figure 11 It can be seen that there is no crystallization peak in the DSC thermal analysis curve of the medium-sized cullet test sample prepared in Example 6. On the contrary, there is an obvious crystallization peak in the DSC thermal analysis curve of the glass powder obtained in step S3 of Example 6. Therefore, the difference in crystallization behavior between the cullet test sample and the glass powder obtained in step S3 during the thermal analysis process indicates that the translucent fire-resistant glass blank prepared in the present application is prone to powder surface crystallization rather than overall crystallization during the calcination process. The reason is that compared with bulk glass, the powdered glass has a smaller particle size and therefore has more activated nucleation sites, and thus has a relatively high crystal content.

[0123] Figure 12 The diffraction peaks in the image have diffuse "mantou" peaks, and, Figure 12 The diffraction peaks in the also have relatively sharp diffraction peaks, which shows that the translucent fireproof glass prepared in Example 6 is composed of a large amount of amorphous glass phase and a small amount of crystals. Figure 12 It can also be seen that the crystals include SiO2 crystals and CaAl2Si2O8 crystals, and XRD software calculations show that the crystallinity of the translucent fireproof glass prepared in Example 6 is 5.5%. The presence of these small amounts of crystals is beneficial to light scattering, thereby making the translucent fireproof glass prepared in Example 6 translucent. In addition, testing and calculations show that the densification degree of the translucent fireproof glass prepared in Example 6 reaches 95% (as can be seen from Table 1), which indicates that the densification degree of the translucent fireproof glass prepared in Example 6 is better.

[0124] In addition, it can be seen from Table 1 that the softening point temperature of the translucent fire-resistant glass prepared in Example 6 reaches 1140°C, which indicates that the fire resistance of the translucent fire-resistant glass prepared in Example 6 is also good; in order to verify the fire resistance of the translucent fire-resistant glass prepared in Example 6 of the present application, the present application also conducted a fire resistance test in accordance with the standard GB / T 15763.1-2009. The test showed that after 240 minutes, the translucent fire-resistant glass with a thickness of 5.0 mm remained intact.

[0125] The translucent fireproof glass prepared in the present application can be used in interior decoration, construction or electronic equipment fields.

[0126] In the embodiments of the present application, only the thickness of the fireproof glass is disclosed. In fact, those skilled in the art can flexibly design the shape and size specifications of the product as needed, and translucent fireproof glass with other shapes and size specifications is also within the scope of protection of this patent.

Claims

1. A translucent fireproof glass, characterized in that: In terms of oxide molar percentages, the translucent fireproof glass contains 74.89 mol% to 75.29 mol% of SiO2, 12.05 mol% to 12.44 mol% of Al2O3, 7.51 mol% to 10.53 mol% of Na2O, 0 to 2.50 mol% of MgO, 0 mol% to 3.00 mol% of CaO, and 0.12 mol% to 0.20 mol% of CeO2; and the sum of the molar percentages of Na2O, MgO, and CaO is not less than the molar percentage of Al2O3. The translucent fireproof glass is prepared by a preparation method of translucent fireproof glass. The preparation method of the translucent fireproof glass includes the following steps: S1: According to the above molar percentage composition of each oxide, accurately weigh each raw material, mix them evenly to form a batch material, and then melt and homogenize the batch material at 1650 °C to 1690 °C to obtain a glass melt. S2: Quench the glass melt with water to obtain crushed glass blocks with a D90 particle size of 5.8 mm to 8.2 mm. S3: Grind the crushed glass blocks and sieve them to obtain glass powder with a size of 200 mesh to 300 mesh. S4: After drying the glass powder, press it into a shape to obtain a green body. Among them, the densification degree of the green body is 80% to 84%. The densification degree of the green body refers to the ratio of the density of the green body to the density of the crushed glass blocks. S5: Calcinate the green body at 1200 °C to 1250 °C for 1 hour to 1.5 hours, and then cool it to room temperature to obtain a preliminary glass product. S6: Grind and polish the preliminary glass product to obtain the translucent fireproof glass. Among them, the densification degree of the translucent fireproof glass is 95% to 97%. The densification degree of the translucent fireproof glass refers to the ratio of the density of the translucent fireproof glass to the density of the crushed glass blocks.

2. The translucent fireproof glass according to claim 1, wherein: The content of SiO2 is 74.90 mol% to 75.15 mol%.

3. The translucent fireproof glass according to claim 1, characterized in that: The content of Al2O3 is 12.30 mol% to 12.44 mol%.

4. The translucent fireproof glass according to claim 1, wherein: The content of Na2O is 9.00 mol% to 10.00 mol%.

5. The translucent fireproof glass according to claim 1, characterized in that: The content of MgO is 1.30 mol% to 2.00 mol%.

6. The translucent fireproof glass according to claim 1, characterized in that: The content of CaO is 1.00 mol% to 2.00 mol%.

7. The translucent fireproof glass according to claim 1, characterized in that: The content of CeO2 is 0.15 mol% to 0.20 mol%.

8. The translucent fireproof glass according to claim 1, wherein: In step S1, the raw materials used are quartz sand, alumina, soda ash, magnesia, calcite, and cerium dioxide.

9. Application of a translucent fireproof glass in the fields of interior decoration, construction, or electronic equipment; the translucent fireproof glass is the translucent fireproof glass according to any one of claims 1 to 8.

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