WO2019001356A1 - 经化学强化的防眩玻璃以及防眩处理用的玻璃 - Google Patents

经化学强化的防眩玻璃以及防眩处理用的玻璃 Download PDF

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WO2019001356A1
WO2019001356A1 PCT/CN2018/092372 CN2018092372W WO2019001356A1 WO 2019001356 A1 WO2019001356 A1 WO 2019001356A1 CN 2018092372 W CN2018092372 W CN 2018092372W WO 2019001356 A1 WO2019001356 A1 WO 2019001356A1
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Prior art keywords
glass
glare
treatment
present
mpa
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PCT/CN2018/092372
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English (en)
French (fr)
Inventor
刘再进
王世友
胡正宜
宫汝华
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四川旭虹光电科技有限公司
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Priority to KR1020207001931A priority Critical patent/KR102289741B1/ko
Priority to JP2019572741A priority patent/JP2020525397A/ja
Priority to US16/624,970 priority patent/US20200172429A1/en
Publication of WO2019001356A1 publication Critical patent/WO2019001356A1/zh

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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
    • C03C15/00—Surface treatment of glass, not in the form of fibres or filaments, by etching
    • 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
    • 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
    • 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
    • C03C3/089—Glass compositions containing silica with 40% to 90% silica, by weight containing boron
    • C03C3/091—Glass compositions containing silica with 40% to 90% silica, by weight containing boron containing aluminium
    • C03C3/093—Glass compositions containing silica with 40% to 90% silica, by weight containing boron containing aluminium containing zinc or zirconium
    • 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
    • C03C4/00—Compositions for glass with special properties
    • C03C4/18—Compositions for glass with special properties for ion-sensitive 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
    • C03C2204/00—Glasses, glazes or enamels with special properties

Definitions

  • the present invention relates to a chemically strengthened anti-glare glass.
  • the invention also relates to a glass for anti-glare treatment.
  • the glass or anti-glare glass provided by the invention can be used for cover glass of various flat panel displays such as mobile phones, computers, car navigation, or other products having high requirements for anti-glare performance.
  • the preparation process of anti-glare glass is mainly divided into mechanical method and chemical method.
  • Mechanical processing methods are mainly divided into sandblasting, sanding and blowing, while chemical processing mainly involves chemical etching and surface coating.
  • chemical processing mainly involves chemical etching and surface coating.
  • the most commonly used process in the industry is to use a chemical etching method because the process has the advantages of simple process, easy control, and suitable for large-area preparation.
  • the anti-glare glass thus prepared has a strength property which is not so satisfactory even after undergoing a strengthening process.
  • an anti-glare glass which is satisfactory in strength properties such as bending resistance, drop resistance, hardness, and scratch resistance.
  • the present invention provides, in one aspect, a chemically strengthened anti-glare glass, wherein the glass comprises:
  • the anti-glare glass according to the first aspect may further contain, in terms of oxides based on mole %:
  • the glass may be subjected to an anti-glare treatment on at least one surface.
  • the anti-glare glass according to the present invention can also be subjected to an anti-glare treatment on both surfaces.
  • the chemically strengthened anti-glare glass provided by the present invention in terms of mole percent of oxide, contains or consists of:
  • the surface subjected to the antiglare treatment is rough, and the roughness is from 10 ⁇ m to 60 ⁇ m.
  • the anti-glare glass may have a haze of 3% to 7%.
  • the 60° gloss measured by the anti-glare glass may be from 100 to 110 GU.
  • the anti-glare glass is preferably subjected to a chemical strengthening treatment.
  • the glass is immersed in the KNO 3 strengthening liquid to cause ion exchange of the KNO 3 strengthening liquid with the glass.
  • the concentration of Na + ions in the KNO 3 strengthening solution used is less than 10,000 ppm.
  • the anti-glare glass according to the present invention may have the following properties after chemical strengthening: surface compressive stress CS ⁇ 650 MPa, preferably ⁇ 700 MPa; and/or stress layer depth DOL ⁇ 30 ⁇ m, preferably ⁇ 35 ⁇ m; and/or pencil hardness (H) > 9; and/or, four-point bending strength ⁇ 500 MPa, preferably 600 MPa, more preferably ⁇ 700 MPa.
  • the anti-glare glass according to the present invention is generally a glass plate and may have a thickness of 0.2 mm to 3 mm.
  • the present invention provides, in a second aspect, a glass for anti-glare treatment, wherein the glass for anti-glare treatment contains:
  • the glass according to the second aspect may further comprise, based on the oxide basis mole %:
  • an anti-glare glass obtained by subjecting at least one surface of the glass for anti-glare treatment to an anti-glare treatment.
  • the anti-glare treatment may in particular be a chemical etching method.
  • the antiglare treatment glass has a surface roughness of 10 ⁇ m to 60 ⁇ m, a haze of 3% to 7%, and a 60° gloss of 100 to 110 GU after the antiglare treatment.
  • the present invention is intended to provide a glass which is satisfactory in both strength properties and anti-glare effects, particularly an anti-glare glass which is prepared by a chemical etching method. That is, the glass (plate) provided by the present invention can withstand the anti-glare effect while having excellent strength properties after being subjected to a conventional chemical strengthening process.
  • Such a glass original sheet can be provided by optimizing the frit side.
  • Such a glass original sheet can provide a finished glass product having excellent strength properties (for example, anti-drop, anti-folding, high hardness, etc.) and anti-glare effects after undergoing anti-glare treatment and chemical strengthening.
  • the present invention first provides a glass composition as a basis, whereby a glass is provided in which the glass contains:
  • the glass may further comprise, based on the oxide in mole percent:
  • the glass according to the invention contains from 62% to 64% SiO 2 , based on the oxide basis mole %.
  • the glass according to the present invention is 6.2% to 8.5% of Al containing 2 O 3, an oxide Jizhunmoer% weight.
  • the glass according to the invention contains from 12.5% to 14% Na 2 O, based on the oxide base mole %.
  • the glass according to the invention consists of the components mentioned above.
  • the glass according to the present invention can be prepared from the provided glass composition by a conventional glass manufacturing method in the art.
  • the conventional glass manufacturing method includes, but is not limited to, a float method or an overflow method.
  • the present invention also provides an anti-glare glass based on the prepared glass.
  • the anti-glare glass based on the mole percent of the oxide, comprises:
  • At least one surface of the glass is subjected to an anti-glare treatment.
  • the anti-glare treatment can be performed on both surfaces of the anti-glare glass.
  • the anti-glare glass may further comprise, based on the oxide basis mole %:
  • the anti-glare glass according to the invention contains from 62% to 64% SiO 2 , based on the oxide basis mole %.
  • the anti-glare glass in accordance with the present invention is 6.2% to 8.5% of Al containing 2 O 3, an oxide Jizhunmoer% weight.
  • the anti-glare glass in accordance with the present invention contains 12.5% to 14% of Na 2 O, an oxide Jizhunmoer% weight.
  • the anti-glare glass according to the invention consists of the components mentioned above.
  • the anti-glare treatment of glass refers to special treatment of at least one surface of the glass to reduce the reflectivity of the glass to light, thereby reducing the interference of ambient light and reducing the reflection of the screen, so that the image is more clear.
  • anti-glare treatment may in principle include mechanical treatment and chemical treatment.
  • the anti-glare treatment herein uses a chemical etching method.
  • the surface subjected to the anti-glare treatment is rough, and the roughness is from 10 ⁇ m to 60 ⁇ m.
  • the haze is from 3% to 7%, and/or the 60° gloss is from 100 to 110 GU.
  • the inventors of the present invention have found that such an anti-glare effect is a cover glass which is particularly suitable for various flat panel displays.
  • 60° gloss means the gloss measurement when light is incident on the sample at an angle of 60 degrees to the normal to the glass surface.
  • the unit of gloss is GU, which is the gloss unit.
  • haze is the percentage of transmitted light intensity above the angle of 2.5° from the incident light as a percentage of the total transmitted light.
  • the glass or the anti-glare treated glass according to the present invention can be used in the post-treatment to improve the strength properties of the glass by various conventional methods of strengthening the glass in the field. However, it is not limited to physical tempering, chemical strengthening, polishing, and the like. In the processing of the glass according to the present invention, chemical strengthening is preferably employed as a later strengthening mode.
  • chemical strengthening is understood to mean strengthening a glass by an ion exchange method known to those skilled in the art of glass manufacturing.
  • ion exchange methods include, but are not limited to, hot melt treatment of hot alkali aluminosilicate glass (or other suitable alkali-containing glass), wherein the hot melt contains ions having an ionic radius greater than that present in the surface of the glass glass, thereby Replace smaller ions with larger ions.
  • potassium ions can displace sodium or lithium ions in the glass.
  • other alkali metal ions having a larger atomic radius, such as ruthenium or osmium may replace smaller alkali metal ions such as potassium in the glass.
  • the glass plate can be immersed in a potassium nitrate melt at 390 to 450 ° C for 3-6 hours or more, thereby completing chemical strengthening.
  • the Na+ ion concentration in the potassium nitrate melt is less than 10,000 ppm.
  • the inventors of the present invention have unexpectedly found that the anti-glare effect of the anti-glare glass according to the present invention is not only excellent in anti-glare effect but also greatly improved in strength properties.
  • the chemically strengthened anti-glare glass has a surface compressive stress CS ⁇ 650 MPa, preferably ⁇ 700 MPa, a stress layer depth DOL ⁇ 30 ⁇ m, preferably ⁇ 35 ⁇ m, a pencil hardness (H) > 9 and a four-point bending strength ⁇ 500 MPa.
  • it is 600 MPa, more preferably ⁇ 700 MPa.
  • Such mechanical properties also make the chemically strengthened anti-glare glass according to the present invention more suitable for use as a cover glass for various flat panel displays.
  • the chemically strengthened anti-glare glass according to the present invention can be prepared as follows:
  • the thickness of the glass may be 0.2 mm to 3 mm.
  • the original glass film is processed to the required size by the machining process of the CNC machine tool (CNC), and the size of the edge of the glass is less than 30 ⁇ m after the edge is edging, and the edge processing quality will affect the strength performance of the glass.
  • CNC CNC machine tool
  • the sample is washed again with deionized water, and then the glass is immersed and polished in a mixed solution containing HF and HCl.
  • the sample was stirred in a bath of a mixed solution containing HF and HCl using the same stirring method as employed in the acid bath.
  • the glass after washing and drying is chemically strengthened, and the concentration of Na + ions in the KNO 3 melt used is less than 10,000 ppm. Because the Na + ion concentration is too high, it will affect the glass properties after chemical strengthening.
  • the chemically strengthened anti-glare glass of the present invention compared with the prior art, a glass plate having stronger strength property after chemical strengthening is obtained, in addition to excellent anti-glare property, the glass is resistant to folding, falling, and hardness. And scratch resistance are better than anti-glare glass on the market.
  • the glass according to the present invention is particularly suitable for use in a glass plate for an anti-glare of a display device.
  • the glass (plate) according to the present invention can be used in a series of flat panel display cover glasses such as mobile phones, computers, car navigation, etc., or other occasions where high strength performance is required.
  • a glass plate was prepared.
  • the glass plates of the present invention were prepared according to the proportions of the components in Examples 1 to 10 in Table 1.
  • the five groups of comparative examples were also given in the following table, that is, Comparative Example 1 to Comparative Example 5.
  • the data in the table is given in terms of oxide base mole %.
  • Example 1 63.75 8.50 13.10 3.80 10.45 0.40 0.00 0.00 0.00
  • Example 2 64.00 6.45 14.00 3.00 11.00 0.10 0.00 1.00 0.45
  • Example 3 58.00 8.50 14.00 5.00 11.00 2.00 1.00 0.50 0.00
  • Example 4 64.00 8.00 10.00 4.40 10.00 1.00 0.80 0.80 1.00
  • Example 5 63.50 5.00 13.30 4.00 10.60 1.20 1.00 0.60 0.80
  • Example 6 64.00 7.20 12.80 5.00 8.00 0.60 0.75 0.70 0.95
  • Example 8 63.73 8.47 13.07 3.8 10.52 1.30 0.70 0.15 0.75
  • Example 9 63.93 8.06 12.62 4.01 10.86 1.85 0.20 0.45 0.50
  • Comparative example 1 64.60 6.40 15 64.00 6.45 14.00 3.00 11.00 0.10
  • the specific preparation process of the glass plate in the present invention is as follows:
  • the mixed raw materials are put into a sealed bag, mixed in a sealed bag, and then poured into a platinum crucible to melt, and the molten glass liquid is poured into a metal mold to bond the glass together with the metal.
  • the molds were placed in an annealing furnace for precision annealing and cooling, and finally, glass plates having a thickness of 0.70 mm were respectively formed.
  • the glass plate was made into a 50 mm ⁇ 50 mm ⁇ 0.70 mm glass sample by CNC, and 20 glass samples were prepared for each of the examples and the comparative examples. Then check the edge with a microscope to ensure that the edge collapse size is not more than 30 ⁇ m.
  • the glass sheets passed through the edge inspection were immersed in a static solution containing 6% by weight of NH 4 HF 2 and 10% propylene glycol for 5 minutes to perform antiglare treatment on both sides.
  • the glass sample was then rinsed with deionized (DI) water for 1 minute.
  • DI deionized
  • the sample was then rinsed again with deionized water for 1 minute and then soaked for 10 minutes in a solution of 4% by weight HF + 4% by weight HCl. And using the same H 2 SO 4 bath agitation method used, such that the sample was stirred at HF + HCl bath.
  • the sample was taken out and rinsed with deionized water and dried with a stream of nitrogen.
  • the dried sample was chemically strengthened in a KNO 3 strengthening solution (Na + concentration of about 3000 ppm) at 400 ° C for about 4 hours.
  • the glass sheets of the respective components shown in Examples 1 to 10 according to the present invention are excellent in the strength properties of the respective glasses although the antiglare properties are comparable to those of Comparative Examples 1 to 5. Better than Comparative Examples 1 to 5.

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  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
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Abstract

提供一种经化学强化的防眩玻璃，以氧化物基准摩尔％计，该玻璃含有SiO2 58～64，优选62～64；Al2O3 5～8.5，优选6.2～8.5；Na2O 10～14，优选12.5-14；K2O 3～5；MgO 8～11，其中，该玻璃的至少一个表面经过防眩处理。还提供用于防眩处理的玻璃以及由其得到的防眩玻璃。

Description

经化学强化的防眩玻璃以及防眩处理用的玻璃 技术领域
本发明涉及一种经化学强化的防眩玻璃。本发明还涉及一种用于防眩处理的玻璃。本发明所提供的玻璃或防眩玻璃可用于手机、电脑、车载导航等各种平板显示的盖板玻璃，或者用于其它对防眩性能有高要求的产品中。
背景技术
随着视屏玻璃材料的发展，日常生活和工作环境中灯光和太阳光的影响日益明显，玻璃防眩光技术及其应用就显得特别重要。目前玻璃防眩光技术已趋于成熟，
防眩玻璃的制备工艺主要分为机械法和化学法。机械方式加工的方法主要分为喷砂法、磨砂法和喷吹法，而化学加工的方法主要有化学蚀刻和表面镀膜。其中，工业上最常用的工艺还是使用化学蚀刻方法，因为该工艺具有工艺简单、容易控制、适合大面积制备等优势。但是如此制备出的防眩玻璃，即使在经历强化工艺后，其强度性能还不那么令人满意。
因此，需要提供一种在诸如抗折、抗摔、硬度和耐划伤性等强度性能方面均令人满意的防眩玻璃。
发明内容
因此，本发明在一个方面中提供了一种经化学强化的防眩玻璃，其中，以氧化物基准摩尔％计，所述玻璃含有：
Figure PCTCN2018092372-appb-000001
根据第一方面的防眩玻璃可以进一步含有，以氧化物基准摩尔％计：
Figure PCTCN2018092372-appb-000002
Figure PCTCN2018092372-appb-000003
在第一方面中，所述玻璃可以至少一个表面经过防眩处理。
根据本发明的防眩玻璃还可以两个表面都经过防眩处理。
在有利的情况中，本发明所提供的经化学强化的防眩玻璃，以氧化物基准摩尔％计，含有或由以下组成：
Figure PCTCN2018092372-appb-000004
本发明所提供的防眩玻璃中，经过防眩处理的表面是粗糙的，粗糙度为10μm～60μm。该防眩玻璃的雾度可以为3％～7％。优选地，防眩玻璃所测量的60°光泽度可以为100～110GU。
所述防眩玻璃优选经过化学强化处理。在所述化学强化的工艺中，以将玻璃浸泡在KNO 3强化液中，使得KNO 3强化液与玻璃发生离子交换。优选地，所使用的KNO 3强化液中Na +离子浓度低于10000ppm。
根据本发明的防眩玻璃在经过化学强化后，可以具有以下性能：表面压应力CS≥650MPa、优选≥700MPa；和/或，应力层深度DOL≥30μm、优选≥35μm；和/或，铅笔硬度(H)＞9；和/或，四点弯曲强度≥500MPa、优选600Mpa、更优选≥700MPa。
根据本发明的防眩玻璃一般为玻璃板材，可以具有0.2mm至3mm的厚度。
本发明在第二方面中提供了一种防眩处理用玻璃，其中，以氧化物基准摩尔％计，所述防眩处理用玻璃含有：
Figure PCTCN2018092372-appb-000005
根据第二方面的玻璃可以进一步含有，以氧化物基准摩尔％计：
Figure PCTCN2018092372-appb-000006
因此，本发明在再一方面中，还提供了一种防眩玻璃，其通过对上述防眩处理用玻璃的至少一个表面实施防眩处理而得到。
所述防眩处理特别地可以为化学蚀刻方式。
上述防眩处理用玻璃，在经过防眩处理后，表面粗糙度为10μm～60μm，雾度为3％～7％，60°光泽度为100～110GU。
具体实施方式
如上文所述，本发明意在提供一种在强度性能和防眩效果均令人满意的玻璃，尤其是采用化学蚀刻方法制备的防眩玻璃。也就是说，本发明所提供的玻璃(板)在经受了常规化学强化工艺后能够不损害防眩效果而同时具有优异的强度性能。
本发明的发明人意外地发现，通过对玻璃料方进行优化，即可以提供这样一种玻璃(原片)。这样的玻璃原片在经历了防眩处理后和化学强化后，能够提供同时具有优异强度性能(例如抗摔、抗折、高硬度等)和防眩效果的玻璃成品。
因此，本发明首先提供的是作为基础的玻璃组成，由此即提供了一种玻 璃，其中，以氧化物基准摩尔％计，所述玻璃含有：
Figure PCTCN2018092372-appb-000007
优选地，该玻璃可以进一步含有，以氧化物基准摩尔％计：
Figure PCTCN2018092372-appb-000008
在一个优选的实施方案中，根据本发明的玻璃含有62％～64％的SiO 2，以氧化物基准摩尔％计。
在一个优选的实施方案中，根据本发明的玻璃含有6.2％～8.5％的Al 2O 3，以氧化物基准摩尔％计。
在一个优选的实施方案中，根据本发明的玻璃含有12.5％-14％的Na 2O，以氧化物基准摩尔％计。
特别优选地，根据本发明的玻璃由上述所提及的各成份所组成。
根据本发明的玻璃可以通过本领域中常规的玻璃制造方法从所提供的玻璃组成制备得到。所述常规的玻璃制造方法包括但不限于浮法或溢流法。
基于所制备得到的玻璃，本发明还提供了一种防眩玻璃。所述防眩玻璃，以氧化物基准摩尔％计，含有：
Figure PCTCN2018092372-appb-000009
其中，所述玻璃的至少一个表面经历了防眩处理。根据对防眩效果的实际要求和应用场合，还可以对该防眩玻璃的两个表面都实施防眩处理。
优选地，该防眩玻璃可以进一步含有，以氧化物基准摩尔％计：
Figure PCTCN2018092372-appb-000010
Figure PCTCN2018092372-appb-000011
在一个优选的实施方案中，根据本发明的防眩玻璃含有62％～64％的SiO 2，以氧化物基准摩尔％计。
在一个优选的实施方案中，根据本发明的防眩玻璃含有6.2％～8.5％的Al 2O 3，以氧化物基准摩尔％计。
在一个优选的实施方案中，根据本发明的防眩玻璃含有12.5％-14％的Na 2O，以氧化物基准摩尔％计。
特别优选地，根据本发明的防眩玻璃由上述所提及的各成份所组成。
在本文中，对玻璃的“防眩处理”是指对玻璃的至少一个表面进行特殊处理，降低玻璃对光的反射率，从而降低环境光的干扰，减少屏幕反光，因此图像更加清晰。在本说明书中，“防眩处理”原则上可以包括机械处理和化学处理方式。在有利的情况中，在本文中的防眩处理采用化学蚀刻的方式。
根据本发明的玻璃，其经过防眩处理的表面是粗糙的，粗糙度为10μm～60μm。优选地，其雾度为3％～7％，和/或60°光泽度为100～110GU。本发明的发明人发现，这样的防眩效果是特别适合各种平板显示的盖板玻璃。
在本文中，“60°光泽度”表示当光以与玻璃表面法线夹角呈60度入射到样品上时的光泽测量结果。光泽度的单位为GU，即光泽单位。
在本文中，“雾度”是偏离入射光2.5°角以上的透射光强占总透射光强的百分数。
当然，可以理解的是根据本发明的玻璃或经防眩处理的玻璃，在后期处理中可以采用本领域中各种常规的强化玻璃的方法来提升玻璃的强度性能，这些强化玻璃的方法，包括但不限于物理钢化、化学强化、抛光研磨等。在根据本发明的玻璃的加工工艺中，优选采用化学强化作为后期的强化方式。
在本文中，“化学强化”应理解为通过玻璃制造领域的技术人员所知的离子交换方法对玻璃进行强化。这样的离子交换方法包括但不限于热熔液处理热碱金属铝硅酸盐玻璃(或其他合适的含碱玻璃)，其中热熔液包含离子半径大于玻璃玻璃表面中存在的离子的离子，从而以较大的离子置换较小的离子。例如，钾离子可以置换玻璃中的钠离子或锂离子。或者其他具有较大原子半径的碱金属离子，如铷或铯可置换玻璃中较小的碱金属离子，如钾等。 类似地，离子交换法中可以使用其他碱金属盐，包括但不限于硫酸盐、卤化物等。例如，可以将玻璃板置于390至450℃的硝酸钾熔融液中浸泡3-6小时以上，由此完成了化学强化。优选地，硝酸钾熔融液中的Na+离子浓度低于10000ppm。
本发明的发明人出人意料地发现，根据本发明的防眩玻璃在经过化学强化后，其防眩效果不仅依然保持优异，而且强度性能得到了很大的提升。在有利的情况中，经过化学强化的防眩玻璃，表面压应力CS≥650MPa、优选≥700MPa，应力层深度DOL≥30μm、优选≥35μm，铅笔硬度(H)＞9且四点弯曲强度≥500MPa、优选600MPa，更优选≥700MPa。这样的机械性能也使得根据本发明的经化学强化的防眩玻璃更加适合于作为各种平板显示的盖板玻璃。
仅作为一个示例，根据本发明的经化学强化的防眩玻璃可以如下制备：
1、根据所提供的组成提供玻璃配料。
2、按配料→熔化→成型→退火→切裁等工艺后得到玻璃原片，并确保玻璃表面无划伤、凹坑、气泡等点缺陷，玻璃表面点缺陷会影响玻璃强度性能。其中，玻璃的板厚可以为0.2mm～3mm。
3、玻璃原片经数控机机床(CNC)加工的加工工序后制成所需尺寸，并保证玻璃边部磨边后崩边尺寸小于30μm，边部加工质量会影响玻璃强度性能。
4、将玻璃片在蚀刻液(例如NH 4HF 2和10％丙二醇的混合溶液)中浸泡，从而使得玻璃表面变粗糙，取出冲洗。在该步骤中，可以对两面都进行化学蚀刻。也可以根据需要，先将一面蒙上贴膜，从而只对一面进行化学蚀刻。
5、然后在酸液(例如H 2SO 4)中浸泡清洗，将该样品保持垂直，以便于流体在表面上通过。浸泡在酸液浴中的同时，通过垂直运动进行机械搅拌。
6、再用去离子水清洗样品，然后在含有HF和HCl的混合溶液中对玻璃进行浸泡抛光。使用与酸液浴中所采用的相同的搅拌方法，使得样品在含有HF和HCl的混合溶液浴中搅拌。
7、最后，取出样品再用去离子水冲洗，用氮气气流干燥。
8、将清洗干燥后的玻璃进行化学强化，所用KNO 3熔融液中Na +离子浓度低于10000ppm。因为Na +离子浓度过高，会影响化学强化后的玻璃性能。
由此得到了根据本发明的经化学强化的防眩玻璃。
根据本发明的化学强化的防眩玻璃，与现有技术相比，在化学强化后获 得强度性能更强的玻璃板，除了优异的防眩性之外，该玻璃的抗折、抗摔、硬度和耐划伤性能均优于市面上防眩玻璃。
因此，根据本发明的玻璃尤其适合用于显示设备防眩用玻璃板。例如，根据本发明的玻璃(板)可用于手机、电脑、车载导航等一系列平板显示器盖板玻璃，或其它对强度性能有高要求的场合中。
实施例
以下对本发明的实施例进行详细说明。应当理解的是，此处所描述的具体实施例仅用于说明和解释本发明，并不用于限制本发明。
首先，制备玻璃板。按照表1中实施例1至10的组分比例进行配比，制备得到不同组分含量的本发明玻璃板；同时，下表中还给出了5组对比例，即对比例1至对比例5。表中数据以氧化物基准摩尔％给出。
表1
编号 SiO 2 Al 2O 3 Na 2O K 2O MgO ZrO 2 B 2O 3 ZnO Li 2O
实施例1 63.75 8.50 13.10 3.80 10.45 0.40 0.00 0.00 0.00
实施例2 64.00 6.45 14.00 3.00 11.00 0.10 0.00 1.00 0.45
实施例3 58.00 8.50 14.00 5.00 11.00 2.00 1.00 0.50 0.00
实施例4 64.00 8.00 10.00 4.40 10.00 1.00 0.80 0.80 1.00
实施例5 63.50 5.00 13.30 4.00 10.60 1.20 1.00 0.60 0.80
实施例6 64.00 7.20 12.80 5.00 8.00 0.60 0.75 0.70 0.95
实施例7 62.80 8.10 13.60 4.80 10.30 0.00 0.00 0.00 0.40
实施例8 63.73 8.47 13.07 3.8 10.52 1.30 0.70 0.15 0.75
实施例9 63.93 8.06 12.62 4.01 10.86 1.85 0.20 0.45 0.50
实施例10 63.88 8.32 12.90 3.95 10.68 1.55 0.48 0.37 0.66
对比例1 64.60 6.40 15.00 5.00 6.60 1.20 0.60 0.40 0.20
对比例2 57.50 4.50 16.00 9.00 13.00 0.00 0.00 0.00 0.00
对比例3 64.20 8.30 9.50 2.20 10.00 2.20 1.30 1.10 1.20
对比例4 67.20 2.30 13.00 1.70 11.00 1.20 1.00 1.00 1.60
对比例5 60.00 7.00 12.00 4.60 13.00 1.00 1.30 1.10 0.00
本发明中玻璃板的具体制备过程如下：
按照上述表1的组分比例进行配比，将混合原料装入密封袋，在密封袋内进行混匀，而后倒入铂金坩埚中熔化，将熔融玻璃液浇注在金属模具中，将玻璃连同金属模一起放入退火炉内进行精密退火冷却，最后分别制成厚度为0.70mm的玻璃板。
通过CNC将玻璃板制成50mm×50mm×0.70mm的玻璃小样，对于每个实施例和对比例分别制备20片玻璃小样。再用显微镜对其边部进行检查，保证边部崩边尺寸不大于30μm。
将通过边部检查的玻璃片在包含6重量％NH 4HF 2和10％丙二醇的静态溶液中浸泡5分钟，即对双面进行防眩处理。然后该玻璃样品在用去离子(DI)水冲洗1分钟。
然后在1M的H 2SO 4中浸泡5分钟，期间该样品保持垂直，以便于流体在表面上通过，并且在样品浸泡在H 2SO 4浴中的同时，通过垂直运动进行机械搅拌。搅拌速度约为2Hz，移动距离约为2英寸。
然后该样品再用去离子水冲洗1分钟，然后在4重量％HF+4重量％HCl的溶液中浸泡10分钟。使用与H 2SO 4浴中所采用的相同的搅拌方法，使得样品在HF+HCl浴中搅拌。
取出样品再用去离子水冲洗，用氮气气流干燥。将干燥后的样品放入400℃的KNO 3强化液(Na+浓度约为3000ppm)中化学强化约4小时。
取出样品并测试其表面压应力CS、应力层深度DOL、铅笔硬度H、四点弯曲性能(4PB)等强度性能，以及60°光泽度、雾度、粗糙度性能，每种小样20片测试结果的平均值如表2所示：
表2
Figure PCTCN2018092372-appb-000012
通过上表2可以清楚地看出，根据本发明的实施例1～10所示各组分的玻璃板，尽管防眩性能与对比例1～5相当，但是在各项玻璃强度性能上均明显优于对比例1～5。
上述实施例仅为本发明所示的优选实施例，并非对本发明保护范围的限制，但凡采用本发明的设计原理，以及在此基础上进行非创造性劳动而作出的变化，均应属于本发明的保护范围之内。

Claims (10)

  1. 一种经化学强化的防眩玻璃，其中，以氧化物基准摩尔％计，所述玻璃含有：
    Figure PCTCN2018092372-appb-100001
    其中，所述玻璃的至少一个表面经过防眩处理。
  2. 根据权利要求1所述的防眩玻璃，其中，以氧化物基准摩尔％计，所述玻璃还含有：
    Figure PCTCN2018092372-appb-100002
  3. 根据权利要求1或2所述的防眩玻璃，其中，经过防眩处理的表面的粗糙度为10μm～60μm，雾度为3％～7％，60°光泽度为100～110GU。
  4. 根据权利要求1-3中任一项所述的防眩玻璃，其中所述化学强化包括以KNO 3强化液浸泡玻璃，且KNO 3熔融液中Na +离子浓度低于10000ppm。
  5. 根据权利要求1-4中任一项所述的防眩玻璃，其中所述防眩玻璃的表面压应力CS≥650MPa、优选≥700MPa，应力层深度DOL≥30μm、优选≥35μm，铅笔硬度(H)＞9且四点弯曲强度≥500MPa、优选600Mpa、更优选≥700MPa
  6. 根据权利要求1-5中任一项所述的防眩玻璃，其厚度为0.2mm至3mm的板材。
  7. 一种防眩处理用玻璃，其中，以氧化物基准摩尔％计，所述防眩处理用玻璃含有：
    Figure PCTCN2018092372-appb-100003
    Figure PCTCN2018092372-appb-100004
  8. 根据权利要求7所述的防眩处理用玻璃，其中，以氧化物基准摩尔％计，所述防眩处理用玻璃还含有：
    Figure PCTCN2018092372-appb-100005
  9. 一种防眩玻璃，其通过对权利要求7或8所述的防眩处理用玻璃的至少一个表面实施防眩处理、优选化学蚀刻而得到。
  10. 根据权利要求9所述的防眩玻璃，其中，经过防眩处理的表面的粗糙度为10μm～60μm，雾度为3％～7％，60°光泽度为100～110GU。
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