CN109502966B - High-hardness high-transmittance glass and preparation method thereof - Google Patents

High-hardness high-transmittance glass and preparation method thereof Download PDF

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CN109502966B
CN109502966B CN201811516545.2A CN201811516545A CN109502966B CN 109502966 B CN109502966 B CN 109502966B CN 201811516545 A CN201811516545 A CN 201811516545A CN 109502966 B CN109502966 B CN 109502966B
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glass
transmittance
hardness
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sio
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CN109502966A (en
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屈国聪
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Zhangjiajie Yongxing Glass Co ltd
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Zhangjiajie Yongxing Glass Co ltd
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    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C3/00—Glass compositions
    • C03C3/04—Glass compositions containing silica
    • C03C3/076—Glass compositions containing silica with 40% to 90% silica, by weight
    • C03C3/095—Glass compositions containing silica with 40% to 90% silica, by weight containing rare earths
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B19/00—Other methods of shaping glass
    • C03B19/02—Other methods of shaping glass by casting molten glass, e.g. injection moulding
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B25/00—Annealing glass products
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B5/00—Melting in furnaces; Furnaces so far as specially adapted for glass manufacture
    • C03B5/16—Special features of the melting process; Auxiliary means specially adapted for glass-melting furnaces
    • C03B5/18—Stirring devices; Homogenisation
    • C03B5/187—Stirring devices; Homogenisation with moving elements
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B5/00—Melting in furnaces; Furnaces so far as specially adapted for glass manufacture
    • C03B5/16—Special features of the melting process; Auxiliary means specially adapted for glass-melting furnaces
    • C03B5/225—Refining
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C1/00—Ingredients generally applicable to manufacture of glasses, glazes, or vitreous enamels
    • C03C1/004—Refining agents

Abstract

The invention discloses high-hardness high-transmittance glass and a preparation method thereof, wherein the glass comprises the following components in percentage by weight: SiO 2240‑54％、Al2O35‑9％、TiO24‑10％、Li2O 8‑15％、ZnO 1‑5％、MgO 0.4‑1.0％、Gd2O36‑12％、MoO30.1‑0.3％、Y2O36‑14％、Sb2O30.16‑0.8％、SnO20.1‑0.3％、CeO20.2-1.2% and ZrO22 to 8 percent. The invention makes the prepared glass have higher hardness by the combination of the comprehensive action among the components and the optimized process, overcomes the problem that the common optical glass is easy to scratch, has higher transmittance and high ornamental value, can be used as ornamental glass of sightseeing cable cars, zoos and novel buildings, and has higher practical value.

Description

High-hardness high-transmittance glass and preparation method thereof
Technical Field
The invention relates to the technical field of glass, in particular to high-hardness high-transmittance glass and a preparation method thereof.
Background
The existing general glass always takes borosilicate glass with high lead content as a main material, the content of PbO in the glass is very high and sometimes can be higher than 70%, and the dissolution problem can occur in the use process, thus influencing the human health. Therefore, lead-free glass has received increasing attention.
Along with the improvement of living standard of people of all countries, people enjoy and pursue beautiful things more and more enthusiastic. The requirements for sightseeing glass in tourist attractions and decorative glass of new buildings are higher and higher. The poor glass luminousness that current sightseeing bus and cable car in tourist attraction were used influences people and vwatchs the scenery and find a view and shoot, and people had to open the glass window for more real appreciation and record external scenery, but to the condition that the glass window can not be opened of this kind of cable car, there is not the solution at present. And because glass needs frequent washing to guarantee better display effect, but the hardness of current glass is lower, and frequent washing can cause obvious mar, produces the influence to glass's definition. Therefore, the preparation of the decorative glass which is pollution-free and has higher transmittance and high hardness is of great significance.
Disclosure of Invention
Aiming at the problem that the hardness and light transmittance of the existing glass in the prior art are low and need to be further improved, the invention provides high-hardness high-transmittance glass and a preparation method thereof.
In order to solve the technical problems, the technical scheme provided by the invention is as follows:
the high-hardness high-transmittance glass comprises the following components in percentage by weight: SiO 22 40-54％、Al2O3 5-9％、TiO2 4-10％、Li2O 8-15％、ZnO 1-5％、MgO 0.4-1.0％、Gd2O3 6-12％、MoO3 0.1-0.3％、Y2O3 6-14％、Sb2O3 0.16-0.8％、SnO2 0.1-0.3％、CeO20.2-1.2% and ZrO2 2-8％。
Compared with the prior art, the high-hardness high-transmittance glass provided by the invention has the following beneficial effects:
(1)Y2O3、Mo2O3and ZrO2The three coexist, which can promote the densification of the glass structure and improve the strength and the toughness of the glass. Y is2O3Can mix Mo2O3And ZrO2Stabilized in SiO2In the tetrahedral structure of (1), Mo is added2O3And ZrO2Solubility in molten glass and reduction of Mo2O3And ZrO2By controlling Y2O3The addition amount of (2) can improve the melting property of the glass.
(2) Using Sb2O3、SnO2And CeO2The three are used as a composite clarifying agent, so that bubbles in the mixture can be effectively promoted to be removed, and the bubbles can be removed to the maximum extent, and the glass with uniform and stable structure can be obtained; the joint action of the three components can also enhance the connection degree of the network, the structure becomes compact, the hardness of the glass is enhanced, and the loss of the light transmittance of the visible light region is effectively prevented.
(3)TiO2ZnO and Gd2O3The three coexist, can effectively adjust the optical parameters of the glass, and can reduce the glass precipitation on the premise of improving the transmittance of the glassUpper limit of the crystallization temperature.
(4) The components are matched according to a specific proportion, so that the components are more uniformly fused, heterogeneous crystallization is avoided, the quality of a glass product is improved, the transmittance of the prepared glass can reach more than 96%, the Vickers hardness can reach more than 660Hv, and the glass has the properties of high transparency and high hardness; and the composition does not contain harmful elements such As Pb, As, Ba, F and the like.
Preferably, the high-hardness high-transmittance glass comprises the following components in percentage by weight: SiO 22 42-47％、Al2O3 6-8％、TiO2 5-9％、Li2O 9-13％、ZnO 1.9-4％、MgO 0.5-0.8％、Gd2O3 7-11％、MoO3 0.12-0.25％、Y2O3 7-13％、Sb2O3 0.4-0.7％、SnO2 0.12-0.25％、CeO20.4-1.0% and ZrO2 3-6％。
More preferably, the high-hardness high-transmittance glass comprises the following components in percentage by weight: SiO 22 45％、Al2O37.5％、TiO2 8.5％、Li2O 12％、ZnO 3％、MgO 0.7％、Gd2O3 9％、Mo2O3 0.15％、Y2O3 8.5％、Sb2O3 0.5％、SnO2 0.15％、CeO20.5% and ZrO2 4.5％
SiO2In the present invention, the silicon-oxygen tetrahedron [ SiO ] is used as a glass former4]Form a basic skeleton of the glass, SiO2The content of SiO in the present invention increases the mechanical strength of the glass and the transmittance in the ultraviolet region, but when the content is too high, devitrification of the glass occurs, so that2The content is 40-55%, preferably 42-50%, more preferably 45%.
Al2O3In the invention, the chemical stability of the glass can be improved, the crystallization tendency of the glass is reduced, and simultaneously, the chemical stability of the glass and SiO can be improved2The tetrahedra form a complete network structure, which improves the hardness and mechanical strength of the glass. But when Al2O3When the content is too high, the content will be too highThe viscosity of the glass is increased, the glass is not easy to melt, therefore, the Al of the invention2O3The content is 5 to 10%, preferably 6 to 9%, more preferably 7.5%. By adjusting SiO2And Al2O3The amount of (A) and (B) is adjusted so that the ratio of the amounts of (A) and (B) is within a suitable range, whereby the mechanical strength of the glass can be improved.
TiO2The invention can obviously improve the transmittance of the glass, enhance the chemical stability of the glass, improve the crystallization performance of the glass and reduce the crystallization upper limit temperature of the glass. But TiO 22When the content is too high, devitrification resistance of the glass is lowered, and therefore, the TiO of the present invention2The content is 4 to 10%, preferably 5 to 9%, more preferably 8.5%. TiO in the invention2And ZrO2Under the combined action, the modulus of the glass can be improved, so that the glass has the advantages of high hardness and high toughness on the premise of meeting the requirement of good transmittance.
Li2O can solve SiO in the invention2And ZrO2The problem of difficult dissolution promotes the melting and clarification of glass liquid, can also greatly reduce the crystallization tendency of glass, and improves the transparency of the glass; however, too much of this material lowers the hardness of the glass, so that Li according to the present invention2The O content is 8 to 16%, preferably 9 to 15%, more preferably 12%.
ZnO is reacted with TiO in the present invention2And Gd2O3The synergistic effect can improve the light transmittance of the glass, improve the devitrification resistance of the glass and reduce the glass transition temperature of the glass, and ZnO can also be mixed with ZrO in the invention2The components have the combined action of participating in forming a glass network and improving the strength and the chemical stability of the glass, but the crystallization tendency of the glass is increased when the content is too high. The ZnO content of the invention is therefore from 1 to 5%, preferably from 2 to 4%, more preferably 3%.
MgO in the invention can reduce the high-temperature viscosity of the glass, improve the hardness, strength, toughness and chemical stability of the glass, and inhibit Li2O is moved to prevent the glass from being crystallized, but the excessive content causes crystallization, so that the MgO content of the present invention is 0.5 to 1.0%, preferably 0.6 to 0.8%, more preferably 0.7%.
Gd2O3And Mo in the invention2O3And Y2O3Coexisting, improving the stability of the glass, improving the devitrification resistance of the glass and reducing the upper limit of the crystallization temperature of the glass2O3The content is 6 to 12%, preferably 7 to 11%, more preferably 9%.
MoO3In the invention, the surface tension of the molten glass can be reduced, the clarification and homogenization of the glass are facilitated, and the quality of the product is improved, but the light transmittance of the glass is influenced by over high content, so that the MoO in the invention3The content is 0.1-0.3%, preferably 0.12-0.26%, more preferably 0.15%.
Y2O3Can function as a stabilizer in the present invention, and Y2O3Has strong accumulation effect, can enhance the compactness of the glass, can also reduce the melting temperature of the glass, does not reduce the devitrification resistance of the glass, but can reduce the light transmittance of the glass when being added excessively, so the Y in the invention2O3The content is 6 to 14%, preferably 7 to 13%, more preferably 8.5%.
Sb2O3In the present invention, Sb is used as a clarifying agent, but when the content is too high, the clarifying effect is not obtained, so that Sb in the present invention2O3The content is 0.2 to 0.8%, preferably 0.4 to 0.7%, more preferably 0.5%.
SnO2In the present invention, the refining agent is used, but when the content is too high, the refining effect cannot be achieved, so that SnO in the present invention2The content is 0.1-0.3%, preferably 0.15-0.25%, more preferably 0.15%.
CeO2In the present invention, CeO is a fining agent, but when the content is too high, the light transmittance of the glass is lowered, so that the present invention2The content is 0.2 to 1.2%, preferably 0.4 to 1.0%, more preferably 0.5%. Sb in the invention2O3、SnO2And CeO2The clarifying effect of the three components as the composite clarifying agent is far higher than the direct accumulation of the effects when the three components are used alone or any two of the three components are used in combination, so that the glass with better clarification degree is obtained.
ZrO2In the present invention canEnhance the chemical stability of the glass, increase the viscosity of the glass, and prevent MgO and Li2O floats from the glass melt due to its low density and ZrO2Can also improve the hardness and elasticity of the glass and reduce the thermal expansion coefficient of the glass, but the content is too high to cause the glass to be crystallized, so the ZrO in the invention2The content is 2 to 8%, preferably 3 to 6%, more preferably 4.5%.
The invention also provides a preparation method of the high-hardness high-transmittance glass, which at least comprises the following steps:
step a, weighing the components according to the design proportion of the high-hardness high-transmittance glass, mixing and crushing the weighed raw materials into particles with the particle size of less than or equal to 0.5mm, and obtaining a mixture;
b, adding the mixture into a platinum crucible furnace for melting, so that the mixture is completely melted to obtain molten glass liquid;
step c, stirring and clarifying the molten glass liquid, cooling, and pouring into a mold preheated to 500-550 ℃ for molding;
and d, transferring the formed glass to an annealing furnace, carrying out cooling annealing treatment, cooling to room temperature at the speed of 5-6 ℃/h, and taking out the glass to obtain the high-hardness high-transmittance glass.
The preparation method is simple to operate, free of complex procedures and special equipment, low in cost and suitable for industrial large-scale production.
Preferably, in step a, the mixture is obtained by ball milling for 15-30 minutes by a ball mill at a rotating speed of 80-120 rpm.
Ball milling the raw material components by a ball mill for 15-30 minutes at a high speed of 80-120rpm can promote the melting of the raw materials, so that the raw materials have the capability of being quickly melted and uniformly mixed.
Preferably, in the step b, the melting temperature of the platinum crucible furnace is 1600-1650 ℃, and the melting time is 10-15 hours.
The optimized smelting temperature and time can effectively promote the rapid melting and mixing of the raw materials.
Preferably, in step c, the stirring speed is 50-100 rpm.
The preferred stirring speed can accelerate and promote the discharge of bubbles, so that the bubbles in the glass can be discharged more completely, and the molten glass is more uniform.
Preferably, in step c, the clarification temperature is 1650-1700 ℃, and the clarification time is 30-50 minutes.
The optimized clarifying temperature and clarifying time can effectively promote the clarification of raw materials and reduce the number of bubbles in the glass, and Sb is used in combination2O3、SnO2And CeO2The three are used as a composite clarifying agent, and the three are combined according to a specific proportion to achieve the best clarifying effect, so that the number of bubbles per kilogram in the product glass is less than 0.08, and the size of the bubbles is less than 0.1 mm.
Preferably, in step d, the annealing temperature is 550-600 ℃, and the annealing time is 3-4 hours.
The preferred annealing temperature and time can eliminate the thermal stress of the glass and improve the mechanical strength and the thermal stability of the glass.
The glass formula provided by the invention can achieve the physicochemical properties required by preparing high-hardness high-transmittance glass, and by the aid of the preparation method provided by the invention, a glass product with the strength of more than 660Hv, the light transmittance of more than 96%, no pollution such as fluorine, no lead and the like can be obtained.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1
The embodiment of the invention provides high-hardness high-transmittance glass which comprises the following components in percentage by weight:
SiO2 45％、Al2O3 7.5％、TiO2 8.5％、Li2O 12％、ZnO 3％、MgO 0.7％、Gd2O3 9％、MoO3 0.15％、Y2O3 8.5％、Sb2O3 0.5％、SnO2 0.15％、CeO20.5% and ZrO2 4.5％。
The preparation steps of the high-hardness high-transmittance glass are as follows:
step a, weighing the components according to the design proportion of the high-hardness high-transmittance glass, ball-milling the weighed raw materials for 20 minutes by a ball mill at the rotating speed of 100rpm, and crushing the raw materials into particles with the particle size of less than or equal to 0.5mm to obtain a mixture;
b, adding the mixture into a platinum crucible furnace, and melting for 15 hours at 1620 ℃ to completely melt the mixture to obtain molten glass;
step c, clarifying the molten glass liquid for 40 minutes under the conditions of stirring speed of 80rpm and temperature of 1680 ℃, cooling to 1550 ℃, and pouring into a mold preheated to 530 ℃ for molding;
and d, transferring the formed glass to an annealing furnace with the temperature of 550 ℃, keeping the temperature for 3.5 hours, cooling to room temperature at the speed of 5 ℃/h, and taking out the glass to obtain the high-hardness high-transmittance glass.
The vickers hardness of the high-hardness high-transmittance glass prepared in this example was 740Hv, the transmittance at 1mm was 98.8%, and the number of bubbles per kg was 0.04.
Example 2
The embodiment of the invention provides high-hardness high-transmittance glass which comprises the following components in percentage by weight:
SiO2 40％、Al2O3 6％、TiO2 10％、Li2O 15％、ZnO 5％、MgO 1.0％、Gd2O3 12％、MoO3 0.3％、Y2O3 7％、Sb2O3 0.4％、SnO2 0.1％、CeO21.2% and ZrO2 2％。
The preparation steps of the high-hardness high-transmittance glass are as follows:
step a, weighing the components according to the design proportion of the high-hardness high-transmittance glass, ball-milling the weighed raw materials for 30 minutes by a ball mill at the rotating speed of 80rpm, and crushing the raw materials into particles with the particle size of less than or equal to 0.5mm to obtain a mixture;
b, adding the mixture into a platinum crucible furnace, and melting for 12 hours at 1600 ℃ to completely melt the mixture to obtain molten glass;
c, clarifying the molten glass liquid for 30 minutes under the conditions of stirring speed of 50rpm and temperature of 1650 ℃, cooling to 1500 ℃, and pouring into a mold preheated to 550 ℃ for molding;
and d, transferring the formed glass to an annealing furnace at the temperature of 580 ℃, keeping the temperature for 4 hours, cooling to room temperature at the speed of 5.5 ℃/h, and taking out the glass to obtain the high-hardness high-transmittance glass.
The vickers hardness of the high-hardness high-transmittance glass prepared in this example was 685Hv, the transmittance at 1mm was 97.8%, and the number of bubbles per kg was 0.08.
Example 3
The embodiment of the invention provides high-hardness high-transmittance glass which comprises the following components in percentage by weight:
SiO2 47％、Al2O3 5％、TiO2 9％、Li2O 8％、ZnO 1.9％、MgO 0.5％、Gd2O3 7％、MoO30.12％、Y2O3 13％、Sb2O3 0.16％、SnO2 0.12％、CeO20.2% and ZrO2 8％。
The preparation steps of the high-hardness high-transmittance glass are as follows:
step a, weighing the components according to the design proportion of the high-hardness high-transmittance glass, ball-milling the weighed raw materials for 15 minutes by a ball mill at the rotating speed of 120rpm, and crushing the raw materials into particles with the particle size of less than or equal to 0.5mm to obtain a mixture;
b, adding the mixture into a platinum crucible furnace, and melting for 10 hours at 1650 ℃ to completely melt the mixture to obtain molten glass;
step c, clarifying the molten glass liquid for 50 minutes under the conditions of stirring speed of 100rpm and temperature of 1700 ℃, cooling to 1530 ℃, and pouring into a mold preheated to 500 ℃ for molding;
and d, transferring the formed glass to an annealing furnace at the temperature of 600 ℃, keeping the temperature for 3 hours, cooling to room temperature at the speed of 6 ℃/h, and taking out the glass to obtain the high-hardness high-transmittance glass.
The high hardness and high transmittance glass prepared in this example had a Vickers hardness of 670Hv, a transmittance of 96.7% at 1mm, and a number of bubbles per kg of glass was 0.06.
Example 4
The embodiment of the invention provides high-hardness high-transmittance glass which comprises the following components in percentage by weight:
SiO2 54％、Al2O3 9％、TiO2 5％、Li2O 9％、ZnO 1％、MgO 0.4％、Gd2O3 11％、MoO30.1％、Y2O3 6％、Sb2O3 0.8％、SnO2 0.3％、CeO20.4% and ZrO2 3％。
The preparation steps of the high-hardness high-transmittance glass are the same as those of the example 1, and are not repeated herein.
The vickers hardness of the high-hardness high-transmittance glass prepared in this example was 680Hv, the transmittance at 1mm was 96.5%, and the number of bubbles per kg was 0.07.
Example 5
The embodiment of the invention provides high-hardness high-transmittance glass which comprises the following components in percentage by weight:
SiO2 42％、Al2O3 8％、TiO2 4％、Li2O 13％、ZnO 4％、MgO 0.8％、Gd2O3 6％、MoO30.25％、Y2O3 14％、Sb2O3 0.7％、SnO2 0.25％、CeO21.0% and ZrO2 6％。
The preparation steps of the high-hardness high-transmittance glass are the same as those of the example 1, and are not repeated herein.
The high hardness, high transmittance glass prepared in this example had a vickers hardness of 675Hv, a transmittance of 97.3% at 1mm, and a number of bubbles per kg of 0.05.
Comparative example 1
The comparative example provides glass comprising the following components in percentage by weight:
SiO2 45％、Al2O3 7.5％、TiO2 8.5％、Li2O 12％、ZnO 3％、MgO 0.7％、Gd2O3 9％、MoO3 0.15％、Y2O3 13％、Sb2O3 0.5％、SnO20.15% and CeO2 0.5％。
The above glass preparation steps are the same as in example 1 and are not described in detail here.
The glass prepared in this comparative example had a vickers hardness of 520Hv, a transmittance of 91.3% at 1mm, and a number of bubbles per kg of 0.08.
Comparative example 2
The comparative example provides glass comprising the following components in percentage by weight:
SiO2 45％、Al2O3 7.5％、TiO2 8.5％、Li2O 12％、ZnO 3％、MgO 0.7％、Gd2O3 9％、MoO3 0.15％、Sb2O3 0.5％、SnO2 0.15％、CeO20.5% and ZrO2 13％。
The above glass preparation steps are the same as in example 1 and are not described in detail here.
The glass prepared in this example had a Vickers hardness of 515Hv, a transmittance at 1mm of 92.3%, and a number of bubbles per kg of glass was 1.0.
Comparative example 3
SiO2 45％、Al2O3 7.5％、TiO2 17.5％、Li2O 12％、ZnO 3％、MgO 0.7％、MoO30.15％、Y2O3 8.5％、Sb2O3 0.5％、SnO2 0.15％、CeO20.5% and ZrO2 4.5％。
The above glass preparation steps are the same as in example 1 and are not described in detail here.
The glass prepared in this comparative example had a Vickers hardness of 545Hv, a transmittance of 86.3% at 1mm, and a number of bubbles per kg of 0.09.
Comparative example 4
SiO2 45％、Al2O3 7.5％、TiO2 8.5％、Li2O 12％、ZnO 3％、MgO 0.7％、Gd2O3 9％、MoO3 0.15％、Y2O3 8.5％、SnO2 0.65％、CeO20.5% and ZrO2 4.5％。
The above glass preparation steps are the same as in example 1 and are not described in detail here.
The glass prepared in this comparative example had a Vickers hardness of 485Hv, a transmittance of 84.7% at 1mm, and a number of bubbles per kg of 2.5.
It can be seen from the above examples and comparative examples that in the formulation of the high-hardness high-transmittance glass provided by the present invention, each raw material component has an irreplaceable effect, and the hardness and transmittance of the glass can be significantly improved by the preferred formulation and process of the present invention.
In conclusion, the invention ensures that the prepared glass has higher hardness by the combination of the comprehensive action of all the components and the optimized process, overcomes the problem that the common optical glass is easy to scratch, has higher transmittance and high ornamental value, can be used as ornamental glass of sightseeing cable cars, zoos and new buildings, and has higher practical value.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents or improvements made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims (7)

1. The high-hardness high-transmittance decorative glass is characterized by comprising the following components in percentage by weight: SiO 22 40-54%、Al2O3 5-9%、TiO2 4-10%、Li2O 8-15%、ZnO 1-5%、MgO 0.4-1.0%、Gd2O3 6-12%、MoO3 0.1-0.3%、Y2O3 6-14%、Sb2O3 0.16-0.8%、SnO2 0.1-0.3%、CeO20.2-1.2% and ZrO2 2-8%；
The high-hardness high-transmittance decorative glass is prepared by the following method:
step a, weighing the components according to the design proportion of the high-hardness high-transmittance glass, mixing and crushing the weighed raw materials into particles with the particle size of less than or equal to 0.5mm, and obtaining a mixture;
b, adding the mixture into a platinum crucible furnace for melting, so that the mixture is completely melted to obtain molten glass liquid;
step c, stirring and clarifying the molten glass liquid, cooling, and pouring into a mold preheated to 500-550 ℃ for molding; the clarification temperature is 1650-;
and d, transferring the formed glass to an annealing furnace, carrying out cooling annealing treatment, cooling to room temperature at the speed of 5-6 ℃/h, and taking out the glass to obtain the high-hardness high-transmittance decorative glass.
2. The high-hardness high-transmittance decorative glass according to claim 1, which comprises the following components in percentage by weight: SiO 22 42-47%、Al2O3 6-8%、TiO2 5-9%、Li2O 9-13%、ZnO 1.9-4%、MgO 0.5-0.8%、Gd2O3 7-11%、MoO3 0.12-0.25%、Y2O3 7-13%、Sb2O3 0.4-0.7%、SnO2 0.12-0.25%、CeO20.4-1.0% and ZrO2 3-6%。
3. The high-hardness high-transmittance decorative glass according to claim 1, which comprises the following components in percentage by weight: SiO 22 45%、Al2O3 7.5%、TiO2 8.5%、Li2O 12%、ZnO 3%、MgO 0.7%、Gd2O3 9%、MoO3 0.15%、Y2O38.5%、Sb2O3 0.5%、SnO2 0.15%、CeO20.5% and ZrO2 4.5%。
4. The decorative glass with high hardness and high transmittance according to claim 1, wherein in the step a, the mixture is obtained by ball milling for 15-30 minutes by a ball mill at a rotation speed of 80-120 rpm.
5. The decorative glass with high hardness and high transmittance as claimed in claim 1, wherein in step b, the melting temperature of the platinum crucible furnace is 1600-1650 ℃, and the melting time is 10-15 hours.
6. The decorative glass with high hardness and high transmittance according to claim 1, wherein in the step c, the stirring speed is 50 to 100 rpm.
7. The decorative glass with high hardness and high transmittance as claimed in claim 1, wherein in step d, the annealing temperature is 550-600 ℃ and the annealing time is 3-4 hours.
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