Rare earth glass and preparation method thereof

Abstract

The invention belongs to the field of glass, and particularly relates to rare earth glass and a preparation method thereof.The rare earth glass comprises, by mass, 60%-85% of SiO2, 5%-15% of Na2O, 5%-15% of CaO, 0.1%-5% of Al2O3, 0.01%-5% of MgO, 0.01%-5% of K2O, 0.5%-10% of Sm2O3, 0.5%-10% of Yb2O3, 0.001%-5% of CeO2, 5% of Eu2O3, 5% of X2O3 and 5% of SnO2, and X2O3 is Dy2O3 and / or Pr2O3. The glass material provided by the invention has relatively high transmittance in a visible light region and relatively high barrier capacity in an infrared band, so that the heat effect brought by an infrared part in sunlight can be reduced, the transmission of natural light is not influenced, and the dual purposes of saving energy and improving the comfort level are achieved.

Description

Technical Field

[0001] The invention belongs to the field of glass, and in particular relates to rare earth glass and a preparation method thereof. Background Art

[0002] In modern society, with the rapid development of the construction and automobile industries, the market demand for high-performance glass materials is growing. Especially in terms of energy saving, environmental protection and comfort improvement, the research and development of high-performance glass materials has become the focus.

[0003] Although traditional glass materials have good light transmittance, they cannot effectively block infrared light, which causes the temperature inside buildings and cars to rise, thereby increasing the frequency of use of refrigeration equipment such as air conditioners, resulting in high energy consumption and adverse environmental impacts. Summary of the invention

[0004] In view of this, an object of the present invention is to provide a rare earth glass and a preparation method thereof. The rare earth glass provided by the present invention can effectively block infrared light while maintaining a high visible light transmittance.

[0005] The invention provides a rare earth glass, which comprises, by mass percentage, 60-85% of SiO2, 5-15% of Na2O, 5-15% of CaO, 0.1-5% of Al2O3, 0.01-5% of MgO, 0.01-5% of K2O, 0.5-10% of Sm2O3, 0.5-10% of Yb2O3, 0.001-5% of CeO2, 0-5% of Eu2O3, 0-5% of X2O3 and 0-5% of SnO2, wherein X2O3 is Dy2O3 and / or Pr2O3.

[0006] Preferably, the components of the rare earth glass include, in mass percentage: SiO2 65-85%, Na2O 5-15%, CaO 5-15%, Al2O3 0.1-5%, MgO 0.01-5%, K2O 0.01-5%, Sm2O3 0.5-2%, Yb2O3 0.5-2%, CeO2 0.001-2%, La2O3 0-2%, Eu2O3 0-0.1%, X2O3 0-0.2%, and SnO2 0-1%.

[0007] Preferably, the components of the rare earth glass include, in mass percentage: SiO2 70-75%, Na2O 12-15%, CaO 10-12%, Al2O3 0.2-4%, MgO 0.01-1%, K2O 0.01-1%, Sm2O3 1-2%, Yb2O3 0.5-1.5%, CeO2 0.01-0.5%, La2O3 0-2%, Eu2O3 0.02-0.1%, X2O3 0.05-0.2%, and SnO2 0.4-1%.

[0008] The present invention provides a method for preparing the rare earth glass described in the above technical solution, comprising the following steps:

[0009] Preparing required raw materials according to the composition of rare earth glass to obtain a glass raw material mixture;

[0010] Melting the glass raw material mixture to obtain molten glass;

[0011] The glass melt is cooled, shaped, and annealed to obtain rare earth glass.

[0012] Preferably, the raw materials include quartz sand, soda ash, limestone, alumina, feldspar, dolomite and rare earth compounds.

[0013] Preferably, the rare earth compound includes one or more of rare earth oxides, rare earth carbonates, rare earth nitrates, rare earth oxalates and rare earth phosphates.

[0014] Preferably, the melting process specifically includes: firstly heating at 1400-1500°C for 0.5-3h; then heating to 1500-1600°C and further heating for 0.5-3h.

[0015] Preferably, the molten glass is processed before being cooled and formed, and the processing techniques include one or more of float process, pressing, casting and drawing.

[0016] Preferably, the annealing temperature is 300-800° C. and the time is 1-6 hours.

[0017] Preferably, the method further comprises: post-processing the rare earth glass after the annealing, wherein the post-processing process comprises one or more of cutting, polishing, laminating and blowing.

[0018] Compared with the prior art, the present invention provides a rare earth glass and a preparation method thereof. The components of the rare earth glass provided by the present invention include, by mass percentage, SiO2 60-85%, Na2O 5-15%, CaO 5-15%, Al2O3 0.1-5%, MgO 0.01-5%, K2O 0.01-5%, Sm2O3 0.5-10%, Yb2O3 0.5-10%, CeO2 0.001-5%, Eu2O3 0-5%, X2O3 0-5%, SnO2 0-5%, wherein X2O3 is Dy2O3 and / or Pr2O3. The present invention dopes specific types of rare earth elements in the basic glass raw materials, which can significantly change the optical properties of the glass and give it the ability of selective light transmission. The glass material provided by the present invention has a high transmittance in the visible light region and a high blocking ability in the infrared band, which can not only reduce the thermal effect caused by the infrared part of sunlight, but also will not affect the transmission of natural light, thus achieving the dual purposes of energy saving and comfort improvement. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0020] Figure 1 is a comparison diagram of the absorption spectra of Example 1 and Comparative Example 1 provided by the present invention;

[0021] Figure 2 is a comparison diagram of the absorption spectra of Example 2 and Comparative Example 2 provided by the present invention;

[0022] Figure 3 is a comparison diagram of the absorption spectra of Example 3 and Comparative Example 3 provided by the present invention;

[0023] Figure 4 It is a comparison diagram of the absorption spectra of Example 4 and Comparative Example 4 provided by the present invention. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present invention are described clearly and completely below. 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.

[0025] The invention provides a rare earth glass. The components of the rare earth glass include, by mass percentage, 60-85% of SiO2, 5-15% of Na2O, 5-15% of CaO, 0.1-5% of Al2O3, 0.01-5% of MgO, 0.01-5% of K2O, 0.5-10% of Sm2O3, 0.5-10% of Yb2O3, 0.001-5% of CeO2, 0-5% of Eu2O3, 0-5% of X2O3 and 0-5% of SnO2.

[0026] In the rare earth glass provided by the present invention, the content of SiO2 can be 60%, 61%, 62%, 63%, 64%, 65%, 66%, 67%, 68%, 69%, 70%, 70.77%, 71%, 71.09%, 71.2%, 71.24%, 72%, 73%, 74%, 75%, 76%, 77%, 78%, 79%, 80%, 81%, 82%, 83%, 84% or 85% by mass.

[0027] In the rare earth glass provided by the present invention, the content of Na2O can be 5%, 5.5%, 6%, 6.5%, 7%, 7.5%, 8%, 8.5%, 9%, 9.5%, 10%, 10.5%, 11%, 11.5%, 12%, 12.5%, 13%, 13.5%, 13.65%, 13.79%, 13.8%, 13.82%, 14%, 14.5% or 15% by mass.

[0028] In the rare earth glass provided by the present invention, the content of CaO may be 5%, 5.5%, 6%, 6.5%, 7%, 7.5%, 8%, 8.5%, 9%, 9.5%, 10%, 10.04%, 10.14%, 10.16%, 10.2%, 10.5%, 11%, 11.5%, 12%, 12.5%, 13%, 13.5%, 14%, 14.5% or 15% by mass.

[0029] In the rare earth glass provided by the present invention, the content of Al2O3 can be 0.1%, 0.2%, 0.5%, 0.58%, 0.7%, 1%, 1.15%, 1.2%, 1.5%, 1.7%, 2%, 2.3%, 2.5%, 2.7%, 3%, 3.2%, 3.5%, 3.7%, 4%, 4.2%, 4.5%, 4.7% or 5% by mass.

[0030] In the rare earth glass provided by the present invention, the content of MgO may be, by mass percentage, 0.01%, 0.05%, 0.1%, 0.2%, 0.5%, 0.63%, 0.64%, 0.7%, 1%, 1.2%, 1.5%, 1.7%, 2%, 2.3%, 2.5%, 2.7%, 3%, 3.2%, 3.5%, 3.7%, 4%, 4.2%, 4.5%, 4.7% or 5%.

[0031] In the rare earth glass provided by the present invention, the content of K2O may be 0.01%, 0.05%, 0.1%, 0.19%, 0.2%, 0.5%, 0.7%, 1%, 1.2%, 1.5%, 1.7%, 2%, 2.3%, 2.5%, 2.7%, 3%, 3.2%, 3.5%, 3.7%, 4%, 4.2%, 4.5%, 4.7% or 5% by mass.

[0032] In the rare earth glass provided by the present invention, the content of Sm2O3 can be specifically 0.5%, 1%, 1.4%, 1.41%, 1.42%, 1.5%, 2%, 2.5%, 3%, 3.5%, 4%, 4.5%, 5%, 5.5%, 6%, 6.5%, 7%, 7.5%, 8%, 8.5%, 9%, 9.5% or 10% by mass.

[0033] In the rare earth glass provided by the present invention, the content of Yb2O3 can be specifically 0.5%, 1%, 1.17%, 1.18%, 1.5%, 2%, 2.5%, 3%, 3.5%, 4%, 4.5%, 5%, 5.5%, 6%, 6.5%, 7%, 7.5%, 8%, 8.5%, 9%, 9.5% or 10% by mass.

[0034] In the rare earth glass provided by the present invention, the content of CeO2 can be specifically 0.001%, 0.005%, 0.01%, 0.05%, 0.07%, 0.1%, 0.12%, 0.15%, 0.2%, 0.23%, 0.25%, 0.3%, 0.4%, 0.5%, 0.7%, 1%, 1.2%, 1.5%, 1.7%, 2%, 2.3%, 2.5%, 2.7%, 3%, 3.2%, 3.5%, 3.7%, 4%, 4.2%, 4.5%, 4.7% or 5% by mass.

[0035] In the rare earth glass provided by the present invention, the content of Eu2O3 can be 0.01%, 0.02%, 0.03%, 0.04%, 0.05%, 0.06%, 0.07%, 0.08%, 0.09%, 0.1%, 0.15%, 0.2%, 0.3%, 0.5%, 0.7%, 1%, 1.5%, 2%, 2.5%, 3%, 3.5%, 4%, 4.5% or 5% by mass.

[0036] In the rare earth glass provided by the present invention, the X2O3 is Dy2O3 and / or Pr2O3; in terms of mass percentage, the content of the X2O3 may be 0.01%, 0.02%, 0.03%, 0.04%, 0.05%, 0.06%, 0.07%, 0.08%, 0.09%, 0.1%, 0.11%, 0.12%, 0.13%, 0.14%, 0.15%, 0.2%, 0.3%, 0.5%, 0.7%, 1%, 1.5%, 2%, 2.5%, 3%, 3.5%, 4%, 4.5% or 5%.

[0037] In the rare earth glass provided by the present invention, the content of SnO2 can be specifically 0.01%, 0.05%, 0.1%, 0.2%, 0.3%, 0.4%, 0.47%, 0.5%, 0.59%, 0.6%, 0.7%, 0.8%, 0.9%, 1%, 1.5%, 2%, 2.5%, 3%, 3.5%, 4%, 4.5% or 5% by mass.

[0038] In the rare earth glass provided by the present invention, its composition preferably also includes 0-2% La2O3, measured in mass percentage, specifically 0.01%, 0.02%, 0.03%, 0.04%, 0.05%, 0.06%, 0.07%, 0.08%, 0.09%, 0.1%, 0.12%, 0.15%, 0.17%, 0.2%, 0.3%, 0.4%, 0.5%, 0.6%, 0.7%, 0.8%, 0.9%, 1%, 1.2%, 1.5%, 1.7% or 2%.

[0039] The present invention also provides a method for preparing the rare earth glass described in the above technical solution, comprising the following steps:

[0040] Preparing required raw materials according to the composition of rare earth glass to obtain a glass raw material mixture;

[0041] Melting the glass raw material mixture to obtain molten glass;

[0042] The glass melt is cooled, shaped, and annealed to obtain rare earth glass.

[0043] In the preparation method provided by the present invention, the raw materials preferably include quartz sand (main component SiO2), soda ash (main component Na2CO3), limestone (main component CaCO3), alumina (Al2O3), feldspar (main component KAlSi3O8 or NaAlSi3O8), dolomite (main component CaMg(CO3)2) and rare earth compounds, and the rare earth compounds include but are not limited to one or more of rare earth oxides, rare earth carbonates, rare earth nitrates, rare earth oxalates and rare earth phosphates.

[0044] In the preparation method provided by the present invention, the specific process of the melting preferably includes: first, heating for a first time under a first temperature condition; then heating to a second temperature, and then heating for a second time. Wherein, the first temperature is preferably 1400-1500°C, and can be specifically 1400°C, 1410°C, 1420°C, 1430°C, 1440°C, 1450°C, 1460°C, 1470°C, 1480°C, 1490°C or 1500°C; the first time is preferably 0.5-3h, and can be specifically 30min, 40min, 50min, 1h, 1h10min, 1h20min, 1h30min, 1h40min, 1h50min, 2h, 2h10min, 2h20min, 2h30min, 2h40min, 2h50min or 3h. h; the second temperature is preferably 1500-1600°C, specifically 1500°C, 1510°C, 1520°C, 1530°C, 1540°C, 1550°C, 1560°C, 1570°C, 1580°C, 1590°C or 1600°C; the second time is preferably 0.5-3h, specifically 30min, 40min, 50min, 1h, 1h10min, 1h20min, 1h30min, 1h40min, 1h50min, 2h, 2h10min, 2h20min, 2h30min, 2h40min, 2h50min or 3h.

[0045] In the preparation method provided by the present invention, the molten glass is preferably processed before being cooled and formed, and the processing technology includes one or more of float process, pressing, casting and drawing.

[0046] In the preparation method provided by the present invention, the cooling molding is preferably carried out in a molding mold.

[0047] In the preparation method provided by the present invention, the annealing temperature is preferably 300-800°C, specifically 300°C, 350°C, 400°C, 450°C, 500°C, 550°C, 600°C, 650°C, 700°C, 750°C or 800°C; the annealing time is preferably 1-6h, specifically 1h, 1.5h, 2h, 2.5h, 3h, 3.5h, 4h, 4.5h, 5h, 5.5h or 6h.

[0048] In the preparation method provided by the present invention, it is preferred to further include: post-processing the rare earth glass that has completed the annealing, and the post-processing process includes one or more of cutting, polishing, film lamination and blowing.

[0049] The technical solution provided by the present invention dopes specific types of rare earth elements into the basic glass raw materials, which can significantly change the optical properties of the glass, endow it with selective light transmission ability, and effectively block infrared light while maintaining high visible light transmittance. More specifically, the technical solution provided by the present invention has the following advantages:

[0050] (1) Simplified manufacturing process: Traditional low-e glass and coated glass require additional coating or coating processes after the glass is formed to achieve specific optical properties. This technology simplifies the manufacturing process by directly adding rare earth materials to the glass raw materials, reducing production steps and time, and lowering manufacturing costs.

[0051] (2) Improve the stability of materials: Since the rare earth components are directly added to the glass raw materials, they are fully combined with the glass matrix during the melting process to form a uniform composite material structure. This method effectively avoids the problems of shedding, wear and aging that may occur in the later coating or plating, thereby improving the long-term stability and durability of the glass material.

[0052] (3) Improved optical properties: Rare earth elements and other elements in glass materials can significantly improve the optical properties of glass. By rationally adjusting the ratio of the various components of the glass material, it is possible to effectively block infrared light while maintaining a high transmittance of visible light. This improvement in optical properties makes the glass material perform well in energy-saving buildings and automotive glass applications.

[0053] (4) Production consistency and controllability: Since rare earth components are added at the raw material stage, the optical performance consistency and quality stability of each batch of glass materials can be ensured by precisely controlling the addition amount and component ratio. This provides a reliable guarantee for large-scale production.

[0054] (5) Environmental protection and energy saving: The method of directly adding rare earth components avoids the harmful chemicals used in traditional coating and plating processes, reducing environmental pollution and the generation of process waste. At the same time, the function of blocking infrared light can effectively reduce the temperature inside buildings and cars, and reduce the frequency of use of refrigeration equipment such as air conditioners, thereby achieving the goal of energy conservation and emission reduction.

[0055] (6) Wide application fields: This new glass material is not only suitable for energy-saving buildings and automotive glass, but can also be used in optical instruments, electronic equipment and other fields. Its excellent optical properties and stability give it significant advantages in various application scenarios.

[0056] For the purpose of greater clarity, the present invention is described in detail with reference to the following examples and comparative examples.

[0057] Example 1

[0058] Taking the preparation of 4 mm thick rare earth glass as an example, the following raw material components are weighed: 600 grams of quartz sand, 5 grams of potassium feldspar, 140 grams of limestone, 25 grams of dolomite, 200 grams of soda ash, 4 grams of alumina, 12 grams of Sm2O3, 10 grams of Yb2O3, 0.6 grams of CeO2, 0.5 grams of La2O3, 0.3 grams of Eu2O3, 0.5 grams of Dy2O3, and 5 grams of SnO2; the above raw materials are mixed evenly, the melting temperature is controlled to be 1450°C, heated for 100 minutes, then increased to 1550°C, and maintained for another 100 minutes, and then the molten glass liquid is poured into a molding mold to be cooled and formed, and a glass sample is obtained after annealing at 400°C for 4 hours; the sample is ground and polished to make a 4 mm thick glass sheet.

[0059] The glass sheet prepared in this embodiment was analyzed and tested, and ordinary white glass produced by commercial manufacturer 1 was used as comparative example 1 for comparison. The spectral performance parameters were measured using a Shimadzu UV / visible / near infrared spectrometer U-4100, and the composition was measured using an inductively coupled plasma mass spectrometer.

[0060] The test results of the composition are shown in Table 1:

[0061] Table 1 Glass components of Example 1 and Comparative Example 1

[0062] Components Example 1 Mass percentage of each component (%) Comparative Example 1 Mass percentage of each component (%) 1 SiO2 71.2 72 2 Na2O 13.8 14 3 CaO 10.2 10 4 K2O 0.1 0 5 MgO 0.64 2 6 Al2O3 0.58 2 7 Sm2O3 1.42 0 8 Yb2O3 1.18 0 9 CeO2 0.07 0 10 La2O3 0.06 0 11 Eu2O3 0.04 0 12 Dy2O3 0.06 0 13 SnO2 0.59 0

[0063] The test results of spectral performance are as follows: Figure 1 As shown in Table 2:

[0064] Table 2 Transmittance of Example 1 and Comparative Example 1

[0065] name Visible light transmittance Solar direct transmittance Total solar transmittance Example 1 80％ 75％ 82％ Comparative Example 1 90％ 85％ 90％

[0066] Through comparison, it is found that Example 1 has a higher transmittance in the visible light region, about 80%, but in the near-infrared region, due to the doping of rare earth ions, its ff transition just overlaps with the solar spectrum and can absorb the solar spectrum well, and the direct transmittance of solar energy is reduced to 75%. It is reduced by 10% compared with ordinary commercially available white glass. The regulation and control of structure and composition can make the rare earth ions in the glass absorb the infrared radiation in the sunlight, convert the solar radiation energy into the transition of the outer electrons of the rare earth ions, and further dissipate the radiation energy in the glass medium through non-radiative transition. The performance of the glass generating medium polarization resonance can also be made by rare earth ions. This resonance absorption can cause the energy of near-infrared light to be absorbed or scattered by the glass medium, rather than propagating to the other side of the medium. By adjusting the type and concentration of rare earth doping, combined with the regulation and control of the properties, structure or thickness of the medium, the resonant frequency and intensity of the medium polarization resonance can be adjusted, thereby realizing the selective absorption or reflection of near-infrared light, and achieving the purpose of isolating near-infrared radiation.

[0067] Example 2

[0068] Taking the preparation of 4 mm thick rare earth glass as an example, the following raw material components are weighed: 600 grams of quartz sand, 5 grams of potassium feldspar, 140 grams of limestone, 25 grams of dolomite, 200 grams of soda ash, 4 grams of alumina, 12 grams of Sm2O3, 10 grams of Yb2O3, 1 gram of CeO2, 0.5 grams of La2O3, 0.3 grams of Eu2O3, 0.5 grams of Dy2O3, and 5 grams of SnO2; the above raw materials are mixed evenly, the melting temperature is controlled to be 1450°C, heated for 100 minutes, then increased to 1550°C, and maintained for another 100 minutes, and then the molten glass liquid is poured into a molding mold to be cooled and formed, and a glass sample is obtained after annealing at 400°C for 4 hours; the sample is ground and polished to make a 4 mm thick glass sheet.

[0069] The glass sheet prepared in this embodiment was analyzed and tested, and ordinary white glass produced by commercial manufacturer 2 was used as comparative example 2 for comparison. The spectral performance parameters were measured using a Shimadzu UV / visible / near infrared spectrometer U-4100, and the composition was measured using an inductively coupled plasma mass spectrometer.

[0070] The test results of the composition are shown in Table 3:

[0071] Table 3 Glass components of Example 2 and Comparative Example 2

[0072]

[0073]

[0074] The test results of spectral performance are as follows: Figure 2 As shown in Table 4:

[0075] Table 4 Transmittance of Example 2 and Comparative Example 2

[0076] name Visible light transmittance Solar direct transmittance Total solar transmittance Example 2 73％ 70％ 79％ Comparative Example 2 90％ 85％ 90％

[0077] Through comparison, it is found that embodiment 2 has a higher transmittance in the visible light region, about 73%, but in the near-infrared region, due to the doping of rare earth ions, its ff transition just overlaps with the solar spectrum and can absorb the solar spectrum well, and the direct transmittance of solar energy is reduced to 70%. It is 15% lower than ordinary commercially available white glass. Through the regulation of composition, the rare earth Ce, Eu, Yb, and Sm ions in the glass can absorb the infrared radiation in the sunlight, convert the sunlight irradiation energy into the transition of the outer electrons of the rare earth ions, and further dissipate the irradiation energy in the glass medium through non-radiative transition. Rare earth ions can also make the medium of the glass produce the performance of polarization resonance at about 1200nm. This resonance absorption can cause the energy of near-infrared light to be absorbed or scattered by the glass medium, rather than propagating to the other side of the medium. By adjusting the type and concentration of rare earth doping, combined with the regulation of the properties, structure or thickness of the medium, the resonant frequency and intensity of the medium polarization resonance can be adjusted, thereby realizing the selective absorption or reflection of near-infrared light, and achieving the purpose of isolating near-infrared radiation.

[0078] Example 3

[0079] Taking the preparation of 4 mm thick rare earth glass as an example, the following raw material components are weighed: 600 grams of quartz sand, 5 grams of potassium feldspar, 140 grams of limestone, 25 grams of dolomite, 200 grams of soda ash, 4 grams of alumina, 12 grams of Sm2O3, 10 grams of Yb2O3, 2 grams of CeO2, 0.5 grams of La2O3, 0.6 grams of Eu2O3, 1 gram of Dy2O3, and 5 grams of SnO2; the above raw materials are mixed evenly, the melting temperature is controlled to be 1450°C, heated for 100 minutes, then increased to 1550°C, and maintained for another 100 minutes, and then the molten glass liquid is poured into a molding mold to be cooled and formed, and a glass sample is obtained after annealing at 400°C for 4 hours; the sample is ground and polished to make a 4 mm thick glass sheet.

[0080] The glass sheet prepared in this embodiment was analyzed and tested, and ordinary white glass produced by commercial manufacturer 3 was used as comparative example 3 for comparison. The spectral performance parameters were measured using a Shimadzu UV / visible / near infrared spectrometer U-4100, and the composition was measured using an inductively coupled plasma mass spectrometer.

[0081] The test results of the composition are shown in Table 5:

[0082] Table 5 Glass components of Example 3 and Comparative Example 3

[0083] Components Example 3 Mass percentage of each component (%) Comparative Example 3 Mass percentage of each component (%) 1 SiO2 71.09 73.48 2 Na2O 13.79 13.2 3 CaO 10.14 12 4 K2O 0.1 0.02 5 MgO 0.64 1 6 Al2O3 0.58 0.5 7 Sm2O3 1.41 0 8 Yb2O3 1.18 0 9 CeO2 0.12 0 10 La2O3 0.06 0 11 Eu2O3 0.07 0 12 Dy2O3 0.12 0 13 SnO2 0.59 0

[0084] The test results of spectral performance are as follows: Figure 3 As shown in Table 6:

[0085] Table 6 Transmittance of Example 3 and Comparative Example 3

[0086] name Visible light transmittance Solar direct transmittance Total solar transmittance Example 3 72％ 65％ 70％ Comparative Example 3 90％ 86％ 91％

[0087] Through comparison, it is found that Example 3 has a higher transmittance in the visible light region, about 72%, but in the near-infrared region, due to the doping of rare earth ions, its ff transition just overlaps with the solar spectrum and can absorb the solar spectrum well, and the direct transmittance of solar energy is reduced to 65%. It is 20% lower than ordinary commercially available white glass. Through the regulation of composition, the rare earth Ce, Eu, Yb, and Sm ions in the glass can absorb the infrared radiation in the sunlight, convert the sunlight irradiation energy into the transition of the outer electrons of the rare earth ions, and further dissipate the irradiation energy in the glass medium through non-radiative transition. Rare earth ions can also make the production medium of glass produce the performance of polarization resonance at about 1200nm. This resonance absorption can cause the energy of near-infrared light to be absorbed or scattered by the glass medium, rather than propagating to the other side of the medium. By adjusting the type and concentration of rare earth doping, combined with the regulation of the properties, structure or thickness of the medium, the resonant frequency and intensity of the medium polarization resonance can be adjusted, thereby realizing the selective absorption or reflection of near-infrared light, and achieving the purpose of isolating near-infrared radiation.

[0088] Example 4

[0089] Taking the preparation of 4 mm thick rare earth glass as an example, the following raw material components are weighed: 600 grams of quartz sand, 5 grams of potassium feldspar, 140 grams of limestone, 25 grams of dolomite, 200 grams of soda ash, 4 grams of alumina, 12 grams of Sm2O3, 10 grams of Yb2O3, 2 grams of CeO2, 0.5 grams of La2O3, 0.6 grams of Eu2O3, 1 gram of Dy2O3, and 5 grams of SnO2; the above raw materials are mixed evenly, the melting temperature is controlled to be 1450°C, heated for 100 minutes, then increased to 1550°C, and maintained for another 100 minutes, and then the molten glass liquid is poured into a molding mold to be cooled and formed, and a glass sample is obtained after annealing at 400°C for 4 hours; the sample is ground and polished to make a 4 mm thick glass sheet.

[0090] The glass sheet prepared in this embodiment was analyzed and tested, and ordinary white glass produced by commercial manufacturer 3 was used as comparative example 4 for comparison. The spectral performance parameters were measured using a Shimadzu UV / visible / near infrared spectrometer U-4100, and the composition was measured using an inductively coupled plasma mass spectrometer.

[0091] The test results of the composition are shown in Table 7:

[0092] Table 7 Glass components of Example 4 and Comparative Example 4

[0093] Components Example 4 Mass percentage of each component (%) Comparative Example 4 Mass percentage of each component (%) 1 SiO2 70.77 73.48 2 Na2O 13.65 13.2 3 CaO 10.04 12 4 K2O 0.19 0.02 5 MgO 0.63 1 6 Al2O3 1.15 0.5 7 Sm2O3 1.40 0 8 Yb2O3 1.17 0 9 CeO2 0.23 0 10 La2O3 0.08 0 11 Eu2O3 0.09 0 12 Dy2O3 0.12 0 13 SnO2 0.47 0

[0094] The test results of spectral performance are as follows: Figure 4 As shown in Table 8:

[0095] Table 8 Transmittance of Example 4 and Comparative Example 4

[0096] name Visible light transmittance Solar direct transmittance Total solar transmittance Example 4 73％ 72％ 71％ Comparative Example 4 90％ 86％ 91％

[0097] Through comparison, it is found that Example 4 has a higher transmittance in the visible light region, about 73%, but in the near-infrared region, due to the doping of rare earth ions, its ff transition just coincides with the solar spectrum and can absorb the solar spectrum well, and the direct transmittance of solar energy is reduced to 72%. It is 14% lower than ordinary commercially available white glass. Through the regulation of composition, the rare earth Ce, Eu, Yb, and Sm ions in the glass can absorb the infrared radiation in the sunlight, convert the sunlight irradiation energy into the transition of the outer electrons of the rare earth ions, and further dissipate the irradiation energy in the glass medium through non-radiative transition. Rare earth ions can also make the production medium of glass produce the performance of polarization resonance at about 1200nm. This resonance absorption can cause the energy of near-infrared light to be absorbed or scattered by the glass medium, rather than propagating to the other side of the medium. By adjusting the type and concentration of rare earth doping, combined with the regulation of the properties, structure or thickness of the medium, the resonant frequency and intensity of the medium polarization resonance can be adjusted, thereby realizing the selective absorption or reflection of near-infrared light, and achieving the purpose of isolating near-infrared radiation.

[0098] Example 5

[0099] Taking the preparation of 4 mm thick rare earth glass as an example, the following raw material components are weighed: 600 grams of quartz sand, 5 grams of potassium feldspar, 140 grams of limestone, 25 grams of dolomite, 200 grams of soda ash, 4 grams of alumina, 12 grams of Sm2O3, 10 grams of Yb2O3, 2 grams of CeO2, 0.5 grams of La2O3, 0.6 grams of Eu2O3, 1 gram of Pr2O3, and 5 grams of SnO2; the above raw materials are mixed evenly, the melting temperature is controlled to be 1450°C, heated for 100 minutes, then increased to 1550°C, and maintained for another 100 minutes, and then the molten glass liquid is poured into a molding mold to be cooled and formed, and a glass sample is obtained after annealing at 400°C for 4 hours; the sample is ground and polished to make a 4 mm thick glass sheet.

[0100] The glass sheet prepared in this embodiment was analyzed and tested, and ordinary white glass produced by commercial manufacturer 3 was used as comparative example 5 for comparison. The spectral performance parameters were measured using a Shimadzu UV / visible / near infrared spectrometer U-4100, and the composition was measured using an inductively coupled plasma mass spectrometer.

[0101] The test results of the composition are shown in Table 9:

[0102] Table 9 Glass components of Example 5 and Comparative Example 5

[0103]

[0104]

[0105] The test results of spectral performance are shown in Table 10:

[0106] Table 10 Transmittance of Example 5 and Comparative Example 5

[0107] name Visible light transmittance Solar direct transmittance Total solar transmittance Example 5 73％ 72％ 70％ Comparative Example 5 90％ 86％ 91％

[0108] Through comparison, it is found that embodiment 5 has a higher transmittance in the visible light region, about 73%, but in the near infrared region, due to the doping of rare earth ions, its ff transition just overlaps with the solar spectrum and can absorb the solar spectrum well, and the total solar energy transmittance is reduced to 70%. It is 21% lower than ordinary commercially available white glass. Through the regulation of composition, the rare earth Eu, Yb, Sm, and Pr ions in the glass can absorb the infrared radiation in the sunlight, convert the sunlight irradiation energy into the transition of the outer electrons of the rare earth ions, and further dissipate the irradiation energy in the glass medium through non-radiative transition. Rare earth ions can also make the production medium of glass produce the performance of polarization resonance at about 1200nm. This resonance absorption can cause the energy of near-infrared light to be absorbed or scattered by the glass medium, rather than propagating to the other side of the medium. By adjusting the type and concentration of rare earth doping, combined with the regulation of the properties, structure or thickness of the medium, the resonant frequency and intensity of the medium polarization resonance can be adjusted, thereby realizing the selective absorption or reflection of near-infrared light, and achieving the purpose of isolating near-infrared radiation.

[0109] The glass of the present invention can be used alone or laminated with common float glass to form composite heat-insulating glass, or can be coated on the surface to obtain richer spectral properties, and can be used for door and window glass and curtain wall glass of various buildings.

[0110] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A rare earth glass, characterized in that: Measured in mass percentage, the components of the rare earth glass include: SiO2 60-85%, Na2O 5-15%, CaO 5-15%, Al2O3 0.1-5%, MgO 0.01-5%, K2O 0.01-5%, Sm2O3 0.5-10%, Yb2O3 0.5-10%, CeO2 0.001-5%, Eu2O3 0-5%, X2O3 0-5%, SnO2 0-5%, and the X2O3 is Dy2O3 and / or Pr2O3.

2. The rare earth glass according to claim 1, characterized in that: Measured in mass percentage, the components of the rare earth glass include: SiO2 65-85%, Na2O 5-15%, CaO 5-15%, Al2O3 0.1-5%, MgO 0.01-5%, K2O 0.01-5%, Sm2O3 0.5-2%, Yb2O3 0.5-2%, CeO2 0.001-2%, La2O3 0-2%, Eu2O3 0-0.1%, X2O3 0-0.2%, and SnO2 0-1%.

3. The rare earth glass according to claim 1, characterized in that: Measured in mass percentage, the components of the rare earth glass include: SiO2 70-75%, Na2O 12-15%, CaO 10-12%, Al2O3 0.2-4%, MgO 0.01-1%, K2O 0.01-1%, Sm2O3 1-2%, Yb2O3 0.5-1.5%, CeO2 0.01-0.5%, La2O3 0-2%, Eu2O3 0.02-0.1%, X2O3 0.05-0.2%, and SnO2 0.4-1%.

4. A method for preparing the rare earth glass according to any one of claims 1 to 3, characterized in that: The following steps are involved: Preparing required raw materials according to the composition of rare earth glass to obtain a glass raw material mixture; Melting the glass raw material mixture to obtain molten glass; The glass melt is cooled, shaped, and annealed to obtain rare earth glass.

5. The preparation method according to claim 4, characterized in that: The raw materials include quartz sand, soda ash, limestone, alumina, feldspar, dolomite and rare earth compounds.

6. The preparation method according to claim 5, characterized in that: The rare earth compound includes one or more of rare earth oxides, rare earth carbonates, rare earth nitrates, rare earth oxalates and rare earth phosphates.

7. The preparation method according to claim 4, characterized in that: The melting process specifically includes: First, heat at 1400-1500°C for 0.5-3h; then increase the temperature to 1500-1600°C and heat again for 0.5-3h.

8. The preparation method according to claim 4, characterized in that: The molten glass is processed before being cooled and formed, and the processing techniques include one or more of float process, pressing, casting and drawing.

9. The preparation method according to claim 4, characterized in that: The annealing temperature is 300-800° C. and the annealing time is 1-6 hours.

10. The preparation method according to claim 4, characterized in that: Also includes: The rare earth glass that has completed the annealing is post-processed, and the post-processing process includes one or more of cutting, polishing, film lamination and blowing.

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