CN116903245A - Aluminosilicate glass and preparation method and application thereof - Google Patents
Aluminosilicate glass and preparation method and application thereof Download PDFInfo
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- CN116903245A CN116903245A CN202311007063.5A CN202311007063A CN116903245A CN 116903245 A CN116903245 A CN 116903245A CN 202311007063 A CN202311007063 A CN 202311007063A CN 116903245 A CN116903245 A CN 116903245A
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- 239000005354 aluminosilicate glass Substances 0.000 title claims abstract description 61
- 238000002360 preparation method Methods 0.000 title description 3
- 229910018072 Al 2 O 3 Inorganic materials 0.000 claims abstract description 18
- 229910004298 SiO 2 Inorganic materials 0.000 claims abstract description 14
- 238000004519 manufacturing process Methods 0.000 claims abstract description 13
- 238000003426 chemical strengthening reaction Methods 0.000 claims abstract description 9
- 229910052708 sodium Inorganic materials 0.000 claims abstract description 8
- 239000011521 glass Substances 0.000 claims description 71
- 238000002844 melting Methods 0.000 claims description 14
- 230000008018 melting Effects 0.000 claims description 14
- 229910052760 oxygen Inorganic materials 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 8
- 239000002994 raw material Substances 0.000 claims description 6
- 229910018068 Li 2 O Inorganic materials 0.000 claims description 4
- 238000000137 annealing Methods 0.000 claims description 4
- 239000006059 cover glass Substances 0.000 claims description 3
- 229910052700 potassium Inorganic materials 0.000 claims description 3
- 238000011282 treatment Methods 0.000 claims description 3
- 239000000203 mixture Substances 0.000 abstract description 8
- 239000004615 ingredient Substances 0.000 abstract description 6
- 238000009472 formulation Methods 0.000 abstract description 5
- 239000011734 sodium Substances 0.000 description 23
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 10
- LIVNPJMFVYWSIS-UHFFFAOYSA-N silicon monoxide Inorganic materials [Si-]#[O+] LIVNPJMFVYWSIS-UHFFFAOYSA-N 0.000 description 10
- 239000000126 substance Substances 0.000 description 8
- 238000013003 hot bending Methods 0.000 description 6
- 230000001965 increasing effect Effects 0.000 description 5
- 238000005342 ion exchange Methods 0.000 description 5
- 229910052742 iron Inorganic materials 0.000 description 5
- -1 potassium oxide ions Chemical class 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000002425 crystallisation Methods 0.000 description 3
- 230000008025 crystallization Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 238000002834 transmittance Methods 0.000 description 3
- YKTSYUJCYHOUJP-UHFFFAOYSA-N [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] Chemical compound [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] YKTSYUJCYHOUJP-UHFFFAOYSA-N 0.000 description 2
- 239000003513 alkali Substances 0.000 description 2
- 229910052783 alkali metal Inorganic materials 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000004031 devitrification Methods 0.000 description 2
- 239000006025 fining agent Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000006060 molten glass Substances 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 239000005368 silicate glass Substances 0.000 description 2
- KKCBUQHMOMHUOY-UHFFFAOYSA-N Na2O Inorganic materials [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 description 1
- 238000006124 Pilkington process Methods 0.000 description 1
- 229910018557 Si O Inorganic materials 0.000 description 1
- 229910001413 alkali metal ion Inorganic materials 0.000 description 1
- 229910000272 alkali metal oxide Inorganic materials 0.000 description 1
- 229910000323 aluminium silicate Inorganic materials 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000005345 chemically strengthened glass Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 239000006066 glass batch Substances 0.000 description 1
- 238000007496 glass forming Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000000265 homogenisation Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- XAEFZNCEHLXOMS-UHFFFAOYSA-M potassium benzoate Chemical compound [K+].[O-]C(=O)C1=CC=CC=C1 XAEFZNCEHLXOMS-UHFFFAOYSA-M 0.000 description 1
- 229910001950 potassium oxide Inorganic materials 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 159000000000 sodium salts Chemical class 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
Classifications
-
- 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
- C03C3/083—Glass compositions containing silica with 40% to 90% silica, by weight containing aluminium oxide or an iron compound
- C03C3/085—Glass compositions containing silica with 40% to 90% silica, by weight containing aluminium oxide or an iron compound containing an oxide of a divalent metal
- C03C3/087—Glass compositions containing silica with 40% to 90% silica, by weight containing aluminium oxide or an iron compound containing an oxide of a divalent metal containing calcium oxide, e.g. common sheet or container glass
-
- 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
- C03C21/00—Treatment of glass, not in the form of fibres or filaments, by diffusing ions or metals in the surface
- C03C21/001—Treatment of glass, not in the form of fibres or filaments, by diffusing ions or metals in the surface in liquid phase, e.g. molten salts, solutions
- C03C21/002—Treatment of glass, not in the form of fibres or filaments, by diffusing ions or metals in the surface in liquid phase, e.g. molten salts, solutions to perform ion-exchange between alkali ions
Abstract
The present disclosure provides an aluminosilicate glass, a method of making and use thereof. The aluminosilicate glass comprises the following components in percentage by mass: 60-78% SiO 2 3-13% Al 2 O 3 5-18% Na 2 O, 0-1% K 2 O, 0-8% MgO and 0-5% CaO, and SiO 2 、Al 2 O 3 、Na 2 O、K 2 O, mgO and CaO are more than 97% by mass, the softening point temperature of the aluminosilicate glass is lower than 800 ℃, and the surface compressive stress of the aluminosilicate glass after chemical strengthening is at least 700MPa. The present disclosure can simplify the formulation and employ cheaper ingredients on the basis of ensuring good mechanical properties and formability, which is advantageous for reducing production costs.
Description
Technical Field
The disclosure relates to the technical field of glass production, in particular to aluminosilicate glass and a preparation method and application thereof.
Background
Aluminosilicate glass is commonly used as a protective glass for vehicle-mounted display screens, and development of the automotive industry places higher demands on the performance of vehicle-mounted display screens. On the one hand, aluminosilicate glass is required to have good mechanical properties to obtain better external impact resistance and scratch resistance; on the other hand, aluminosilicate glass is required to have a lower softening point temperature to reduce the hot bending difficulty and improve the yield.
The prior art solutions for achieving good mechanical properties and lower softening point temperatures of aluminosilicate glasses often employ more ingredients and/or employ more expensive ingredients, which results in higher production costs for aluminosilicate glasses.
Disclosure of Invention
One technical problem to be solved by the present disclosure is: the prior art has resulted in higher production costs due to the use of more ingredients and/or the use of more expensive ingredients in improving the mechanical and shaping properties of aluminosilicate glass.
To solve the above technical problems, embodiments of the present disclosure provide an aluminosilicate glass, which includes, in mass percent: 60-78% SiO 2 3-13% Al 2 O 3 5-18% Na 2 O, 0-1% K 2 O, 0-8% MgO and 0-5% CaO, and SiO 2 、Al 2 O 3 、Na 2 O、K 2 O, mgO and CaO are more than 97% by mass, the softening point temperature of the aluminosilicate glass is lower than 800 ℃, and the surface compressive stress of the aluminosilicate glass after chemical strengthening is at least 700MPa.
In some embodiments, siO 2 、Al 2 O 3 、Na 2 O、K 2 O, mgO and CaO are more than 99.5 percent in mass percent.
In some embodiments, the aluminosilicate glass comprises, in mass percent: 66-76% SiO 2 3-8% Al 2 O 3 10-18% Na 2 O, 0-0.8% K 2 O, 2-6% MgO and 0-4% CaO.
In some embodiments, the softening point temperature is less than 750 ℃; and/or a surface compressive stress of at least 750MPa.
In some embodiments, the aluminosilicate glass further comprises 0-0.12% Fe by mass percent 2 O 3 0-0.05% SO 3 。
In some embodiments, the aluminosilicateThe glass does not comprise at least one of: b (B) 2 O 3 、P 2 O 5 、Li 2 O、ZnO。
In some embodiments, k1= (Na 2 O and K in mass percent 2 O mass percent)/(MgO mass percent + CaO mass percent), and K1 is 1-4.
In some embodiments, k2=k is defined 2 Mass percent of O/Na 2 O and K2 are 0-0.1 in mass percent.
The embodiment of the disclosure also provides a method for preparing aluminosilicate glass according to any one of the above embodiments, comprising: the raw materials are mixed and then sequentially subjected to melting, clarifying, homogenizing, forming and annealing treatments to obtain the aluminosilicate glass.
The disclosed embodiments also provide for the use of the aluminosilicate glass according to any one of the embodiments above in a screen cover glass.
Through the technical scheme, the aluminosilicate glass provided by the disclosure can simplify the formula and adopt cheaper components on the basis of ensuring good mechanical properties (the surface compressive stress after chemical strengthening is at least 700 MPa) and formability (the softening point temperature is lower than 800 ℃), and is beneficial to reducing the production cost.
Drawings
In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present disclosure, and other drawings may be obtained according to these drawings without inventive effort to a person of ordinary skill in the art.
FIG. 1 is a graph showing the transmittance as a function of wavelength for aluminosilicate glasses prepared in accordance with example embodiments of the disclosure.
Detailed Description
Embodiments of the present disclosure are described in further detail below with reference to the drawings and examples. The following detailed description of the embodiments and the accompanying drawings are provided to illustrate the principles of the disclosure and not to limit the scope of the disclosure, which may be embodied in many different forms and not limited to the specific embodiments disclosed herein, but rather to include all technical solutions falling within the scope of the claims.
The present disclosure provides these embodiments in order to make the present disclosure thorough and complete, and fully convey the scope of the disclosure to those skilled in the art. It should be noted that: the relative arrangement of parts and steps, the composition of materials, numerical expressions and numerical values set forth in these embodiments should be construed as exemplary only and not limiting unless otherwise specifically stated.
In the description of the present disclosure, unless otherwise indicated, the meaning of "plurality" is greater than or equal to two; the terms "upper," "lower," "left," "right," "inner," "outer," and the like indicate an orientation or positional relationship merely for convenience of describing the present disclosure and simplifying the description, and do not indicate or imply that the devices or elements being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be construed as limiting the present disclosure. When the absolute position of the object to be described is changed, the relative positional relationship may be changed accordingly.
Furthermore, the use of the terms first, second, and the like in this disclosure do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. The "vertical" is not strictly vertical but is within the allowable error range. "parallel" is not strictly parallel but is within the tolerance of the error. The word "comprising" or "comprises" and the like means that elements preceding the word encompass the elements recited after the word, and not exclude the possibility of also encompassing other elements.
It should also be noted that, in the description of the present disclosure, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the terms in the present disclosure may be understood as appropriate by those of ordinary skill in the art. When a particular device is described as being located between a first device and a second device, there may or may not be an intervening device between the particular device and either the first device or the second device.
All terms used in the present disclosure have the same meaning as understood by one of ordinary skill in the art to which the present disclosure pertains, unless specifically defined otherwise. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the techniques, methods, and apparatus should be considered part of the specification.
The present disclosure provides an aluminosilicate glass comprising, in mass percent: 60-78% SiO 2 3-13% Al 2 O 3 5-18% Na 2 O, 0-1% K 2 O, 0-8% MgO and 0-5% CaO, and SiO 2 、Al 2 O 3 、Na 2 O、K 2 O, mgO and CaO are greater than 97% by mass, the softening point temperature of the aluminosilicate glass is lower than 800 ℃, and the surface Compressive Stress (CS) of the aluminosilicate glass after chemical strengthening is at least 700MPa.
In embodiments of the present disclosure, siO is employed 2 、Al 2 O 3 、Na 2 O、K 2 O, mgO and CaO as main components (the sum of the mass percentages of these components is more than 97%), and only less than 3% of other components (including unavoidable impurities and/or other substances incorporated during the production process). These main components are involved in six total components, so that the formulation is simplified, and these main components are generally cheaper, so that the aluminosilicate glass provided by the present disclosure can ensure good mechanical properties (after chemical strengtheningThe surface compressive stress is at least 700 MPa) and the formability (softening point temperature is lower than 800 ℃) are adopted, so that the production cost is reduced.
In the glass composition of the present disclosure, siO 2 The higher the content of the components, the more chemical durability of the glass is improved, and the mechanical strength of the glass is improved. But with SiO 2 The melting temperature and viscosity of the glass batch are also increased due to the increase of the content, which not only causes difficulty in melting glass and increases energy consumption, but also is unfavorable for hot bending forming. If SiO is 2 If the content is too low, the glass structure is loose and easy to devitrify, which is unfavorable for improving the chemical durability. SiO in the present disclosure 2 The mass percentage content of the glass is 60-78%, which can better meet the requirements of melting and mechanical strength of the glass component.
In the glass composition of the present disclosure, al 2 O 3 The intermediate oxide is used as glass forming agent, can greatly improve the chemical stability of glass, can reduce the crystallization tendency of glass, can reduce the expansion coefficient, and is an essential component for improving the hardness and mechanical strength of glass. If Al is 2 O 3 If the content is too low, the strength and weather resistance of the glass are not improved, the intrinsic strength and weather resistance of the glass are not ideal, and the strengthening efficiency is low; if the content is higher than 13%, the melting temperature of the glass increases, the difficulty of melting increases, and the homogenization of the molten glass becomes difficult, and defects such as streaks are easily generated, which are disadvantageous for mass production, and the softening point temperature increases, which are disadvantageous for hot bending molding. Al in the present disclosure 2 O 3 The mass percentage content of the glass is 3-13%, and the requirements of the glass on mechanical strength and hot bending forming can be well met.
In the glass component of the present disclosure, na 2 O is used as an external network oxide in glass, can provide free oxygen to break Si-O bonds, plays a role of fluxing, reduces the viscosity and melting temperature of aluminosilicate glass, reduces the softening point temperature of the glass, is also a substance necessary for chemical strengthening, and forms a surface compression stress and stress layer through exchange with potassium oxide ions. Na (Na) 2 If the content of O is too low, glassThe melting temperature of the glass is too high, which is not beneficial to melting and forming of the glass and Na + And K is equal to + Is a chemical exchange of (a); na (Na) 2 The excessive content of O can increase the linear thermal expansion coefficient, reduce the strength, weather resistance and other performances of the glass, and Na 2 The amount of O volatilized increases, which tends to cause non-uniformity in the aluminosilicate glass component. Therefore, comprehensively considering the mass percent content of Na2O in the present disclosure is 5-18%.
In the glass component of the present disclosure, K 2 O and Na 2 O is an alkali metal oxide, and is also used as an external network oxide in glass, and has similar effect in the glass structure and small amount of K 2 O replaces Na 2 The O can exert the 'mixed alkali effect', and can improve the properties of molten glass, chemical resistance, weather resistance and the like while fluxing; in addition, K 2 O also has the effect of increasing ion exchange rate, achieving greater surface compressive stress and depth of stress layer. Thus, taken together, K in this disclosure 2 The mass percentage of O is 0-1%.
Among the components for glass disclosed by the invention, mgO can improve the material property of glass liquid, and has the characteristics of greatly improving the compressive capacity of the glass, reducing the high-temperature viscosity and enabling the glass to be easy to melt. The addition of MgO can properly reduce the clarifying temperature of the aluminosilicate glass and eliminate the defect of unmelted ingredients. Meanwhile, the addition of MgO is beneficial to the compression stress formed in the glass ion exchange process, but the too high MgO content also affects the network skeleton of the glass, increases the crystallization tendency of the glass, and further affects the performances of the glass such as compressive strength, weather resistance, chemical strengthening efficiency and the like. Thus, comprehensively considering the mass percent content of MgO in the present disclosure is 0-8%.
Among the glass components of the present disclosure, caO is an essential component for stabilizing glass, and can promote melting of glass and adjust glass formability. However, when the content is too large, crystallization tends to occur in the glass, the thermal expansion coefficient is greatly increased, brittleness is increased, and the alkali metal ion exchange is seriously hindered by CaO. Therefore, in the case where DOL (depth of stress layer) is to be ensured, it is preferable to reduce the content thereof. Comprehensively considering, the CaO content in the present disclosure is 0-6% by mass.
In some embodiments, the aluminosilicate glass comprises, in mass percent: 66-76% SiO 2 3-8% Al 2 O 3 10-18% Na 2 O, 0-0.8% K 2 O, 2-6% MgO and 0-4% CaO.
In the aluminosilicate glass of the disclosure, siO 2 The mass percent content of (c) may be 61%, 63%, 65%, 67%, 68%, 69%, 70%, 71%, 72%, 72.5%, 73%, 73.5%, 74%, 74.5%, 75%, 76%, 77%, and any value between any two adjacent mass percent contents. In the aluminosilicate glass of the disclosure, al 2 O 3 The mass percent content of (c) may be 3.5%, 4%, 4.5%, 5%, 5.5%, 6%, 7%, 9%, 11%, 13%, and any value between any two adjacent mass percent contents. In the aluminosilicate glass of the disclosure, na 2 The mass percent of O may be 6%, 8%, 10%, 12%, 13%, 13.5%, 14%, 14.5%, 15%, 15.5%, 16%, 16.5%, 17%, 18%, and any value between any two adjacent mass percent contents. In the aluminosilicate glass of the disclosure, K 2 The mass percent content of O may be 0, 0.2%, 0.4%, 0.6%, 0.8%, 1%, and any value between any two adjacent mass percent contents. In the aluminosilicate glass of the disclosure, the MgO may be present in a mass percent amount of 0, 1%, 2%, 3%, 4%, 5%, 6%, 8%, and any value between any two adjacent mass percent amounts. In the aluminosilicate glass of the disclosure, the mass percent content of CaO may be 0, 1%, 2%, 3%, 4%, 5%, and any value between any two adjacent mass percent contents.
In some embodiments, in aluminosilicate glass, siO 2 、Al 2 O 3 、Na 2 O、K 2 The sum of the mass percentages of O, mgO and CaO may be 97.3%, 97.5%, 97.8%, 98%, 98.3%, 98.5%, 98.8%, 99%, 99.3%, 99, for example.5%. In some embodiments, in aluminosilicate glass, siO 2 、Al 2 O 3 、Na 2 O、K 2 The sum of the mass percentages of O, mgO and CaO may be more than 99.5%, for example, 99.55%, 99.6%, 99.65%, 99.7%, 99.75%, 99.8%, 99.85%, 99.9%, 99.95%. Thereby further reducing SiO removal 2 、Al 2 O 3 、Na 2 O、K 2 O, mgO and the content of other components except CaO, thereby further simplifying the formulation.
In some embodiments, the aluminosilicate glass does not comprise at least one of: b (B) 2 O 3 、P 2 O 5 、Li 2 O, znO. The prior art aluminosilicate glasses typically include these components, which are more expensive than others, and the present disclosure avoids the use of one or more of these components to reduce production costs. The aluminosilicate glass may not contain B 2 O 3 、P 2 O 5 、Li 2 O, znO, any one, any two, any three or all.
In some embodiments, the aluminosilicate glass comprises no SiO 2 、Al 2 O 3 、Na 2 O、K 2 O, mgO and CaO, and 0-0.12% by mass of Fe 2 O 3 0-0.05% SO 3 . Iron may be an optional component of the present disclosure, but will result in the introduction of iron species, fe, in other raw materials and in the production line 2 O 3 The glass will be yellow, feO will make the glass blue, and the two will make the glass green under the combined action. Fe in the raw materials is needed to be added 2 O 3 The mass percentage of the aluminum silicate glass to be produced is controlled to be in the range of less than 0.12% so that the aluminum silicate glass is not colored by the presence of iron ions, more preferably less than 0.05%, and most preferably no iron. SO (SO) 3 As a fining agent for glass melting, the content of the fining agent is controlled within a range of less than 0.05% by mass, more preferably less than 0.01% by mass, and most preferably no SO 3 。
In some embodiments, the softening point temperature of glasses prepared based on the disclosed formulations may be less than 775 ℃, and may be further less than 750 ℃, for example, may be in the range of 730-745 ℃. The glass prepared based on the disclosed formulation has a surface compressive stress after chemical strengthening of at least 725MPa, further at least 750MPa, and may be, for example, in the range of 755-815 MPa.
In some embodiments, k1= (Na 2 O and K in mass percent 2 O mass percent)/(MgO mass percent + CaO mass percent), and K1 is 1-4. The inventors of the present disclosure found that limiting K1 to a range of 1-4 is advantageous in promoting ion exchange, increasing the surface compressive stress value, enhancing the surface compressive and scratch resistance, and K1 may be, for example, 2.
In some embodiments, k2=k is defined 2 Mass percent of O/Na 2 O and K2 are 0-0.1 in mass percent. The inventors of the present disclosure found that limiting K2 to a range of 0-0.1 is advantageous in controlling warpage, and K2 may be, for example, 0.02.
The present disclosure also provides a method for preparing aluminosilicate glass according to any one of the above embodiments, comprising: the raw materials are mixed and then sequentially subjected to melting, clarifying, homogenizing, forming and annealing treatments to obtain the aluminosilicate glass.
The present disclosure also provides the use of an aluminosilicate glass according to any one of the embodiments above in a screen cover glass.
In summary, through the technical scheme of the disclosure, the external impact resistance and scratch resistance of the aluminosilicate glass can be improved, the softening point temperature of the aluminosilicate glass can be reduced, so that the aluminosilicate glass is convenient for hot bending and forming, the yield is improved, and the formula can be simplified to reduce the production cost.
The following description is made with reference to specific examples.
In examples 1 to 10, glass raw material components were mixed by a float process, and then subjected to melting, fining, homogenizing, forming and annealing processes in this order, and finally cut to obtain glass sheets having a thickness of 1.1 mm. The glass components and mass percentages of the glass components of examples 1 to 10 are shown in Table 1.
Table 1 glass components and mass% contents of examples 1 to 10
The glass plate is chemically strengthened by ion exchange in a salt bath of molten sodium salt and potassium salt at 360-450 ℃, namely alkali metal cations with larger radius are used for replacing alkali metal cations with smaller radius existing in the glass, so that a layer generating Compressive Stress (CS) is formed on the surface of the glass, and the depth of the compressive layer extending from the surface to the inside of the glass is the depth DOL of the compressive stress layer, thus obtaining the alkali-containing aluminosilicate chemically strengthened glass. Table 2 shows the glass performance test values of examples 1 to 10.
TABLE 2 glass Properties of examples 1 to 10
Wherein T is 2 The temperature at which the viscosity reached 102 dPa.s; t (T) 4 Indicating the temperature at which the viscosity reached 104 dPa.s; t (T) L The devitrification temperature was represented by pulverizing glass into glass particles of about 2mm using a mortar, placing the glass particles side by side in a platinum boat, and performing heat treatment in a temperature gradient furnace at an amplification of 10 ℃ for 24 hours, and the highest temperature of the crystal precipitated glass particles was the devitrification temperature.
As can be seen from Table 2, the aluminosilicate glasses of examples 1 to 10 have softening points ranging from 731 to 745 ℃ and lower softening temperatures, which facilitate hot bending formation; after chemical strengthening, the CS of the glass is 755-611 MPa, the DOL is 8.75-11.55 mu m, and the mechanical strength is greatly improved.
FIG. 1 shows a schematic view of the change of the light transmittance of aluminosilicate glass along with the wavelength, and as shown in FIG. 1, the light transmittance (T%) of aluminosilicate glass at a wavelength of 520nm is 92.2%, so that the optical requirement of the vehicle-mounted display screen protective glass can be met.
Thus, various embodiments of the present disclosure have been described in detail. In order to avoid obscuring the concepts of the present disclosure, some details known in the art are not described. How to implement the solutions disclosed herein will be fully apparent to those skilled in the art from the above description.
Although some specific embodiments of the present disclosure have been described in detail by way of example, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present disclosure. It will be understood by those skilled in the art that the foregoing embodiments may be modified and equivalents substituted for elements thereof without departing from the scope and spirit of the disclosure. In particular, the technical features mentioned in the respective embodiments may be combined in any manner as long as there is no structural conflict.
Claims (10)
1. An aluminosilicate glass characterized by comprising, in mass percent: 60-78% SiO 2 3-13% Al 2 O 3 5-18% Na 2 O, 0-1% K 2 O, 0-8% MgO and 0-5% CaO, and SiO 2 、Al 2 O 3 、Na 2 O、K 2 O, mgO and CaO, wherein the sum of the mass percentages is more than 97%, the softening point temperature of the aluminosilicate glass is lower than 800 ℃, and the surface compressive stress of the aluminosilicate glass after chemical strengthening is at least 700MPa.
2. The glass of claim 1, wherein SiO 2 、Al 2 O 3 、Na 2 O、K 2 O, mgO and CaO are more than 99.5 percent in mass percent.
3. The glass according to claim 1, wherein the aluminosilicate glass package, in mass percentThe method comprises the following steps: 66-76% SiO 2 3-8% Al 2 O 3 10-18% Na 2 O, 0-0.8% K 2 O, 2-6% MgO and 0-4% CaO.
4. The glass of claim 1, wherein the softening point temperature is less than 750 ℃; and/or the surface compressive stress is at least 750MPa.
5. The glass according to claim 1, wherein the aluminosilicate glass further comprises 0-0.12% by mass of Fe 2 O 3 0-0.05% SO 3 。
6. The glass of claim 1, wherein the aluminosilicate glass does not comprise at least one of: b (B) 2 O 3 、P 2 O 5 、Li 2 O、ZnO。
7. Glass according to claim 1, characterized in that k1= (Na 2 O and K in mass percent 2 O mass percent)/(MgO mass percent + CaO mass percent), and K1 is 1-4.
8. Glass according to claim 1, characterized in that k2=k is defined 2 Mass percent of O/Na 2 O and K2 are 0-0.1 in mass percent.
9. A method of making an aluminosilicate glass according to any one of claims 1-8, comprising: and mixing the raw materials, and sequentially carrying out melting, clarifying, homogenizing, forming and annealing treatment to obtain the aluminosilicate glass.
10. Use of the aluminosilicate glass of any one of claims 1-8 in a screen cover glass.
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| CN202311007063.5A CN116903245A (en) | 2023-08-10 | 2023-08-10 | Aluminosilicate glass and preparation method and application thereof |
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