WO2022166028A1

WO2022166028A1 - Aluminosilicate tempered glass and preparation method therefor

Info

Publication number: WO2022166028A1
Application number: PCT/CN2021/094109
Authority: WO
Inventors: 刘红刚; 宋纪营; 陈志鸿; 王琰; 何进; 肖子凡; 周翔磊; 平文亮; 戴斌
Original assignee: 清远南玻节能新材料有限公司; 咸宁南玻光电玻璃有限公司; 中国南玻集团股份有限公司
Priority date: 2021-02-08
Filing date: 2021-05-17
Publication date: 2022-08-11
Also published as: CN112794653A; CN112794653B

Abstract

The present invention relates to aluminosilicate tempered glass and a preparation method therefor. According to the aluminosilicate tempered glass, one-step strengthening is performed on aluminosilicate glass by using a mixed molten salt of NaNO3 and KNO3. In weight percent, the composition of the aluminosilicate glass comprises: 53% to 64% of SiO2, 23% to 28% of Al2O3, 4% to 7% of Li2O, 1.5% to 5.5% of Na2O, 0.01% to 0.8% of K2O, 1% to 5% of MgO, 3.5% to 6% of B2O3, and 0.4% to 3% of ZrO2. Compared with traditional tempered glass, the aluminosilicate tempered glass has more excellent mechanical properties, can pass special performance tests such as drop onto rough ground, ring-in-ring test and four-point bending strength test, and has a lower thermal expansion coefficient.

Description

铝硅酸盐强化玻璃及其制备方法Aluminosilicate strengthened glass and preparation method thereof

技术领域technical field

本发明涉及玻璃制造技术领域，特别是涉及一种铝硅酸盐强化玻璃及其制备方法。The invention relates to the technical field of glass manufacturing, in particular to an aluminosilicate reinforced glass and a preparation method thereof.

背景技术Background technique

手机在今天已成为日常生活中的必需品，平板电脑也逐渐普及，各种带有触摸屏面板的设备在各行业也得到了广泛应用。近几年，随着移动互联网5G通讯技术和无线充电技术的发展，越来越多的手机开始使用双面玻璃的设计。同时，手机为了追求薄型化、窄边框等差异化、个性化设计理念，越来越多的手机采用了3D曲面的盖板或背板设计。Mobile phones have become a necessity in daily life today, tablet computers are becoming more and more popular, and various devices with touch screen panels are also widely used in various industries. In recent years, with the development of mobile Internet 5G communication technology and wireless charging technology, more and more mobile phones have begun to use double-sided glass design. At the same time, in order to pursue differentiated and personalized design concepts such as thinness and narrow bezels, more and more mobile phones use 3D curved cover or backplane designs.

广大的手机终端用户依然不满足于简单的抗跌落性能、抗划伤性能和抗落球冲击性能，这些传统的性能测试往往不适用于日常的使用环境。例如，手持手机高度1.6米，跌落在粗糙地面上(与光滑地面的跌落高度破碎高度相比较，粗糙地面的跌落破碎高度衰减50％以上，砂纸颗粒度越大，高度降低得越显著)；手机放置于背包中，与钥匙或者其他坚硬的物品发生反复的撞击等；应用于3D曲面时的弯曲性能等。因此，手机制作厂商又进一步提出了几种特殊的性能测试方法，例如：手机整机跌落于不同颗粒度的砂纸地面上，反复跌落直至破碎的高度；环套环测试、四点弯曲强度等。The majority of mobile phone end users are still not satisfied with the simple anti-drop performance, anti-scratch performance and anti-ball impact performance. These traditional performance tests are often not suitable for daily use environments. For example, a mobile phone with a height of 1.6 meters is dropped on a rough ground (compared with the drop height of a smooth ground, the drop height of the rough ground is attenuated by more than 50%, and the greater the particle size of the sandpaper, the more significant the reduction in height); Placed in a backpack, repeated impacts with keys or other hard objects, etc.; bending performance when applied to 3D surfaces, etc. Therefore, mobile phone manufacturers have further proposed several special performance testing methods, such as: the whole mobile phone is dropped on the ground of sandpaper with different particle sizes, and it is repeatedly dropped until it is broken;

而当传统化学强化工艺生产的盖板玻璃进行上述几种特殊的性能测试以后，其性能结果和性能稳定性大部分都不够理想。However, when the cover glass produced by the traditional chemical strengthening process is subjected to the above-mentioned special performance tests, most of its performance results and performance stability are not satisfactory.

传统的盖板玻璃制备方法可例如对高铝玻璃采用一步离子交换工艺进行强化，主流的高铝玻璃组成范围以质量百分数计大致为：55％～70％的SiO ₂、12％～23％的Al ₂O ₃、13％～16％的Na ₂O、0％～5％的K ₂O、2％～6％的MgO、0％～5％的B ₂O ₃、0～2％的ZrO ₂。由于氧化铝含量高，其本身强度高于普通钠钙玻璃，同时其离子交换能力也较强，主要应用于电子产品的保护盖板和保护贴片玻璃等，具有较高的可见光透过率。上述高铝玻璃在温度为390℃～450℃的纯硝酸钾熔盐中进行2h～8h的离子交换后，表面压应力(CS)一般达到650MPa，应力层深度(DOL)在30μm。在此基础上，若延长离子交换时间至8h以上，其应力层深度可增大至60μm附近，但依然远远达不到期望值(如100μm以上)，而且表面压应力值相应降低，并容易导致强化后玻璃表面形成难以去除的富碱层，进而形成微裂纹缺陷，严重影响保护盖板的整体强度。因此，该一步法离子交换化学强化工艺对玻璃的性能提升存在瓶颈。 The traditional preparation method of cover glass can, for example, use one _- step ion exchange process to strengthen the high alumina glass. Al ₂ O ₃ , 13%-16% Na ₂ O, 0%-5% K ₂ O, 2%-6% MgO, 0%-5% B ₂ O ₃ , 0-2% ZrO ₂ . Due to the high alumina content, its own strength is higher than that of ordinary soda lime glass, and its ion exchange capacity is also strong. The surface compressive stress (CS) generally reaches 650MPa and the depth of stress layer (DOL) is 30μm after the above-mentioned high alumina glass is ion-exchanged in pure potassium nitrate molten salt at a temperature of 390℃～450℃ for 2h～8h. On this basis, if the ion exchange time is extended to more than 8h, the depth of the stress layer can be increased to around 60μm, but it is still far from the expected value (such as more than 100μm), and the surface compressive stress value is correspondingly reduced, and it is easy to cause After strengthening, a hard-to-remove alkali-rich layer is formed on the surface of the glass, thereby forming micro-crack defects, which seriously affects the overall strength of the protective cover. Therefore, the one-step ion-exchange chemical strengthening process has a bottleneck in improving the performance of glass.

另外，有方法在上述传统的盖板玻璃制备方法的基础上引入一定量Li ₂O，制备高碱(硼)铝硅酸盐玻璃，其主流的组成范围以质量百分数计大致为：60％～65％的SiO ₂、17％～25％的Al ₂O ₃、2％～4％的B ₂O ₃、3％～6％的P ₂O ₅、10％～16％的Na ₂O、2％～4％的Li ₂O、0％～5％的K ₂O、0％～5％的MgO和0％～3％的ZrO ₂。并对该高碱(硼)铝硅酸盐玻璃开展两步法或者多步法的离子交换化学强化工艺，通过控制第一步和第二步的熔盐浓度的差异，分别完成Li-Na和Na-K的离子交换，同时获得较高的压应力层深度和理想的表面压应力值。提高玻璃盖板的跌落破碎高度，获得机械性能、抗力学冲击性能更加优异的保护玻璃。现有技术方案中涉及两步法或者多步法离子交换的化学强化工艺，其核心原理：在第一步法离子交换工艺中，通过玻璃中Li ⁺与熔盐中Na ⁺进行离子交换，可以在有限的时间以内获得压应力层，且应力层深度较深，使玻璃具有更加优异的抗力学冲击性能；在通过第二步离子交换工艺，通过玻璃浅表层应力层中的Na ⁺与熔盐中K ⁺进行离子交换，可以较短时间内获得较高的应力值，使玻璃具有更加优异抗划伤性能和显微硬度。然而，采用这种特殊的强化工艺获得的保护玻璃虽然可以获得优异的机械性能，但是对于手机盖板生产厂商需要频繁地调整工艺和增加离子交换时间至300min以上，且容易发生不同熔盐的污染问题、熔盐使用寿命偏短等问题、工艺稳定性差、良率低、设备投资及生产成本偏高等问题。 In addition, there is a method to introduce a certain amount of Li ₂ O on the basis of the above-mentioned traditional cover glass preparation method to prepare high alkali (boron) aluminosilicate glass, and the mainstream composition range in terms of mass percentage is roughly 60%～ 65% SiO ₂ , 17%-25% Al ₂ O ₃ , 2%-4% B ₂ O ₃ , 3%-6% P ₂ O ₅ , 10%-16% Na ₂ O, 2 %-4% Li ₂ O, 0-5% K ₂ O, 0-5% MgO and 0-3% ZrO ₂ . And carry out a two-step or multi-step ion exchange chemical strengthening process for the high alkali (boron) aluminosilicate glass. By controlling the difference in the molten salt concentration in the first step and the second step, Li-Na and The ion exchange of Na-K can simultaneously obtain a higher compressive stress layer depth and an ideal surface compressive stress value. Improve the drop breaking height of the glass cover, and obtain a protective glass with better mechanical properties and mechanical impact resistance. The prior art solution involves a two-step or multi-step ion exchange chemical strengthening process, the core principle of which is that in the first step ion exchange process, Li ⁺ in the glass and Na ⁺ in the molten salt are ion-exchanged, which can The compressive stress layer is obtained within a limited time, and the depth of the stress layer is deep, so that the glass has more excellent mechanical shock resistance; through the second step ion exchange process, Na ⁺ and molten salt in the stress layer of the shallow surface of the glass are passed through. The ion exchange of medium K ⁺ can obtain a higher stress value in a short time, so that the glass has more excellent scratch resistance and microhardness. However, although the protective glass obtained by this special strengthening process can obtain excellent mechanical properties, it is necessary for mobile phone cover manufacturers to frequently adjust the process and increase the ion exchange time to more than 300min, and it is prone to pollution by different molten salts Problems, problems such as short service life of molten salt, poor process stability, low yield, high equipment investment and production costs, etc.

但是，上述方法制备的铝硅酸盐玻璃均无法通过上述粗糙地面跌落、环套环测试以及四点弯曲强度测试，机械性能有待进一步提升。However, none of the aluminosilicate glasses prepared by the above method can pass the above rough ground drop, ring-to-ring test and four-point bending strength test, and the mechanical properties need to be further improved.

另外，低膨胀系数能够赋予玻璃盖板产品更为广泛用途，更好地满足盖板玻璃3D热弯的温度需求，以及适用于采用3D模具制成更复杂结构的3D玻璃。而传统方法对于盖板玻璃膨胀系数的相关研究较少，虽然前述铝硅酸盐玻璃在35℃～50℃的热膨胀系数能够达到73～95×10 ^-7℃ ^-1，350℃～550℃的热膨胀系数为80～100×10 ^-7℃ ^-1，但依然有待进一步改善。 In addition, the low coefficient of expansion can give glass cover products more extensive use, better meet the temperature requirements of 3D hot bending of cover glass, and be suitable for 3D glass with more complex structures made of 3D molds. However, there are few studies on the expansion coefficient of cover glass by traditional methods, although the thermal expansion coefficient of the aforementioned aluminosilicate glass at 35℃～50℃ can reach 73～95× ^10-7 ℃ ^-1 , 350℃～550℃ The thermal expansion coefficient is 80～100×10 ^-7 ℃ ^-1 , but it still needs to be further improved.

发明内容SUMMARY OF THE INVENTION

基于此，有必要提供一种铝硅酸盐强化玻璃及其制备方法。该铝硅酸盐强化玻璃较传统的强化玻璃具有更为优异的机械性能，能够通过粗糙地面跌落、环套环测试以及四点弯曲强度测试等特殊性能测试。Based on this, it is necessary to provide an aluminosilicate strengthened glass and a preparation method thereof. The aluminosilicate tempered glass has more excellent mechanical properties than traditional tempered glass, and can pass special performance tests such as rough ground drop, ring ring test and four-point bending strength test.

具体技术方案如下：The specific technical solutions are as follows:

本发明一方面，提供一种铝硅酸盐强化玻璃，采用NaNO ₃和KNO ₃混合熔盐对铝硅酸盐玻璃进行一步强化；以重量百分比计，所述铝硅酸盐玻璃的组成包括： In one aspect of the present invention, an aluminosilicate reinforced glass is provided. The aluminosilicate glass is strengthened by a mixed molten salt of NaNO ₃ and KNO ₃ in one step; in terms of weight percentage, the composition of the aluminosilicate glass includes:

53％～64％的SiO ₂、23％～28％的Al ₂O ₃、4％～7％的Li ₂O、1.5％～5.5％的Na ₂O、 0.01％～0.8％的K ₂O、1％～5％的MgO、3.5％～6％的B ₂O ₃以及0.4％～3％的ZrO ₂。 53%-64% SiO ₂ , 23%-28% Al ₂ O ₃ , 4%-7% Li ₂ O, 1.5%-5.5% Na ₂ O, 0.01%-0.8% K ₂ O, 1% to 5% of MgO, 3.5% to 6% of B ₂ O ₃ and 0.4% to 3% of ZrO ₂ .

在其中一个实施例中，以重量百分比计，所述铝硅酸盐玻璃的组成还包括重量百分含量≤4％的P ₂O ₅；及/或 In one embodiment, the composition of the aluminosilicate glass further comprises P ₂ O ₅ with a weight percentage of ≤4% in weight percentage; and/or

所述铝硅酸盐玻璃的组成还包括重量百分含量≤3％的CaO；及/或The composition of the aluminosilicate glass further includes CaO with a weight percentage content of ≤3%; and/or

所述铝硅酸盐玻璃的组成还包括重量百分含量≤2％的ZnO。The composition of the aluminosilicate glass also includes ZnO with a weight percentage content of ≤2%.

在其中一个实施例中，所述铝硅酸盐玻璃的组成中ZnO的重量百分比含量为0.07％～1.1％。In one embodiment, the weight percent content of ZnO in the composition of the aluminosilicate glass is 0.07% to 1.1%.

在其中一个实施例中，所述铝硅酸盐玻璃的组成中ZnO的重量百分比含量为0.07％～0.55％。In one embodiment, the weight percent content of ZnO in the composition of the aluminosilicate glass is 0.07% to 0.55%.

在其中一个实施例中，所述铝硅酸盐玻璃的组成中P ₂O ₅的重量百分比含量为0.2％～0.47％。 In one embodiment, the weight percent content of P ₂ O ₅ in the composition of the aluminosilicate glass is 0.2% to 0.47%.

本发明的又一方面，提供所述的铝硅酸盐强化玻璃的制备方法，包括如下步骤：Another aspect of the present invention provides the preparation method of the aluminosilicate reinforced glass, comprising the following steps:

按照所述铝硅酸盐玻璃的组成混合各原料，并进行熔制处理，然后退火、成型，制备所述铝硅酸盐玻璃；The raw materials are mixed according to the composition of the aluminosilicate glass, and subjected to melting treatment, followed by annealing and molding to prepare the aluminosilicate glass;

将所述铝硅酸盐玻璃浸入NaNO ₃和KNO ₃混合熔盐中进行离子交换，制备所述的铝硅酸盐强化玻璃。 The aluminosilicate glass is immersed in a mixed molten salt of NaNO ₃ and KNO ₃ for ion exchange to prepare the aluminosilicate reinforced glass.

在其中一个实施例中，所述熔制处理的温度为1500℃～1700℃；及/或In one embodiment, the temperature of the melting process is 1500°C to 1700°C; and/or

所述退火的温度为550℃～750℃。The temperature of the annealing is 550°C to 750°C.

在其中一个实施例中，以质量百分含量计，所述熔盐包括3％～15％的NaNO ₃和85％～97％的KNO ₃；及/或 In one embodiment, in terms of mass percentage, the molten salt comprises 3%-15% NaNO ₃ and 85%-97% KNO ₃ ; and/or

所述离子交换的温度为390℃～460℃。The temperature of the ion exchange is 390°C to 460°C.

在其中一个实施例中，所述离子交换的时间为120min～180min。In one embodiment, the time for the ion exchange is 120 min to 180 min.

本发明的又一方面，提供一种玻璃保护层，包括如上所述的铝硅酸盐强化玻璃。In yet another aspect of the present invention, there is provided a glass protective layer comprising the aluminosilicate strengthened glass as described above.

本发明的又一方面，提供一种玻璃盖板，包括如上所述的铝硅酸盐强化玻璃。In yet another aspect of the present invention, a glass cover plate is provided, comprising the aluminosilicate tempered glass as described above.

本发明的又一方面，提供一种电子产品，以如上所述的铝硅酸盐强化玻璃作为玻璃盖板。In yet another aspect of the present invention, an electronic product is provided, using the aluminosilicate tempered glass as described above as a glass cover plate.

与现有技术相比较，本发明具有如下有益效果：Compared with the prior art, the present invention has the following beneficial effects:

本发明提供的铝硅酸盐强化玻璃，通过合理调整所述铝硅酸盐玻璃的组成，优化铝硅酸盐强化玻璃的机械性能，进而使得该铝硅酸盐强化玻璃较传统的强化玻璃具有更为优异的机械性能，能够通过粗糙地面跌落、环套环测试以及四点弯曲强度测试等特殊性能测试。In the aluminosilicate tempered glass provided by the present invention, the mechanical properties of the aluminosilicate tempered glass are optimized by reasonably adjusting the composition of the aluminosilicate glass, so that the aluminosilicate tempered glass has better properties than the traditional tempered glass. With more excellent mechanical properties, it can pass special performance tests such as rough ground drop, ring-sleeve test and four-point bending strength test.

同时，所述铝硅酸盐强化玻璃还可以维持较低的膨胀系数。经过离子交换后，玻璃体系的内部张应力CT值较高，玻璃网络结构完善，高断裂韧性可抑制强化工艺中的自爆问题。较高的弹性模量和内部张应力可以有效提升玻璃强化后的刚性，当作为电子产品的保护盖板时，不仅自身具有极高的抗冲击强化，还可以有效提升电子产品整体的结构刚性，更可有效抑制边框形变并保护内部的电子元器件，较低的膨胀系数能够满足盖板玻璃3D热弯的温度需求，且由于与模具的膨胀率接近，可以通过3D模具制成更复杂结构的3D玻璃。同时，采用NaNO ₃和KNO ₃混合熔盐对铝硅酸盐玻璃进行一步强化即可，工艺流程简单，易于高精度地工艺管控，强化时间可保持在180min以下，加工效率高。 At the same time, the aluminosilicate strengthened glass can also maintain a low expansion coefficient. After ion exchange, the internal tensile stress CT value of the glass system is high, the glass network structure is perfect, and the high fracture toughness can suppress the self-explosion problem in the strengthening process. Higher elastic modulus and internal tensile stress can effectively improve the rigidity of glass after strengthening. When used as a protective cover for electronic products, it not only has extremely high impact resistance, but also can effectively improve the overall structural rigidity of electronic products. It can more effectively suppress the deformation of the frame and protect the internal electronic components. The lower expansion coefficient can meet the temperature requirements of the 3D hot bending of the cover glass, and because the expansion rate is close to that of the mold, more complex structures can be made through the 3D mold. 3D glass. At the same time, the aluminosilicate glass can be strengthened in one step by using the mixed molten salt of NaNO ₃ and KNO _3. The process flow is simple, and it is easy to control the process with high precision. The strengthening time can be kept below 180min, and the processing efficiency is high.

具体实施方式Detailed ways

以下结合具体实施例对本发明的铝硅酸盐强化玻璃及其制备方法作进一步详细的说明。本发明可以以许多不同的形式来实现，并不限于本文所描述的实施方式。相反地，提供这些实施方式的目的是使对本发明公开内容理解更加透彻全面。The aluminosilicate strengthened glass of the present invention and the preparation method thereof will be further described in detail below with reference to specific embodiments. The present invention may be embodied in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that a thorough and complete understanding of the present disclosure is provided.

除非另有定义，本文所使用的所有的技术和科学术语与属于本发明的技术领域的技术人员通常理解的含义相同。本文中在本发明的说明书中所使用的术语只是为了描述具体的实施例的目的，不是旨在于限制本发明。Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terms used herein in the description of the present invention are for the purpose of describing specific embodiments only, and are not intended to limit the present invention.

本发明提供一种铝硅酸盐强化玻璃，采用NaNO ₃和KNO ₃混合熔盐对铝硅酸盐玻璃进行一步强化；以重量百分比计，所述铝硅酸盐玻璃的组成包括： The invention provides an aluminosilicate reinforced glass, which adopts NaNO ₃ and KNO ₃ mixed molten salt to strengthen the aluminosilicate glass in one step; in terms of weight percentage, the composition of the aluminosilicate glass includes:

53％～66％的SiO ₂、23％～28％的Al ₂O ₃、4％～7％的Li ₂O、1.5％～5.5％的Na ₂O、0.01％～0.8％的K ₂O、1％～5％的MgO、3.5％～6％的B ₂O ₃以及0.4％～3％的ZrO ₂。 53%-66% SiO ₂ , 23%-28% Al ₂ O ₃ , 4%-7% Li ₂ O, 1.5%-5.5% Na ₂ O, 0.01%-0.8% K ₂ O, 1% to 5% of MgO, 3.5% to 6% of B ₂ O ₃ and 0.4% to 3% of ZrO ₂ .

对铝硅酸盐玻璃中的各组分说明如下：The components in the aluminosilicate glass are described as follows:

二氧化硅(SiO ₂)是形成玻璃骨架所必需的成分。SiO ₂能提高玻璃的强度、化学稳定性等，可以使玻璃获得较低的热膨胀系数。其含量过低时，玻璃主体网络结构较差，机械性能不佳，且耐候性变差；含量过高时，硅氧骨架结构比例偏高，网络间隙较小，不利于化学强化离子交换，影响化学增强的效率。同时，玻璃在生产过程中熔制温度过高，能耗增加，且容易造成频繁的气泡、结石等缺陷。因此，铝硅酸盐玻璃中，SiO ₂含量控制为53％～64％，具体地，包括但不限于：53％、54％、55％、56％、57％、58％、59％、60％、61％、62％、63％、64％。 Silicon dioxide (SiO ₂ ) is an essential component for forming the glass skeleton. SiO ₂ can improve the strength and chemical stability of the glass, and can make the glass obtain a lower thermal expansion coefficient. When the content is too low, the main network structure of the glass is poor, the mechanical properties are poor, and the weather resistance becomes poor; Chemically enhanced efficiency. At the same time, the melting temperature of glass in the production process is too high, the energy consumption increases, and it is easy to cause frequent defects such as bubbles and stones. Therefore, in the aluminosilicate glass, the SiO ₂ content is controlled to be 53% to 64%, specifically, including but not limited to: 53%, 54%, 55%, 56%, 57%, 58%, 59%, 60% %, 61%, 62%, 63%, 64%.

氧化铝(Al ₂O ₃)是增加玻璃离子交换能力所必需的成分，同时它能提高玻璃的化学稳定性和弹性模量。其含量过低时，网络空间的空隙变小，不利于离子迁移，严重影响化学增强的效率；其含量过高时，玻璃高温黏度明显增大，生产过程中熔制温度过高，能耗增加，同样不利于控制气泡、结石等缺陷。因此，铝硅酸盐玻璃中，Al ₂O ₃含量控制为23％～28％，具体地，包括但不限于：23％、24％、25％、26％、27％、28％。 Alumina (Al ₂ O ₃ ) is an essential component to increase the ion exchange capacity of glass, and at the same time it can improve the chemical stability and elastic modulus of glass. When its content is too low, the voids in the network space become smaller, which is not conducive to ion migration and seriously affects the efficiency of chemical enhancement; when its content is too high, the high temperature viscosity of the glass increases significantly, the melting temperature in the production process is too high, and the energy consumption increases , it is also not conducive to the control of defects such as air bubbles and stones. Therefore, in the aluminosilicate glass, the Al ₂ O ₃ content is controlled to be 23% to 28%, specifically, including but not limited to: 23%, 24%, 25%, 26%, 27%, 28%.

氧化锂(Li ₂O)是理想的助熔剂，是进行离子交换必需的成分，由于Li ⁺的极化特性，在高温下能有效减低高温黏度。由于本发明在强化工艺的中使用NaNO ₃与KNO ₃的混合熔盐，通过玻璃中Li ⁺与熔盐中Na ⁺进行离子交换，可以在较短的时间内提升压应力层深度，使玻璃具有更加优异的抗力学冲击性能。若含量过低，玻璃基本难以获得更高CS _Na30和CS _Na50；若含量过高，增加了玻璃制造成本，玻璃膨胀系数显著增大，且玻璃析晶倾向过高，玻璃生成结石缺陷的概率明显增加。因此，铝硅酸盐玻璃中，Li ₂O含量控制为4％～7％，具体地，包括但不限于：4％、5％、6％、7％。 Lithium oxide (Li ₂ O) is an ideal flux and an essential component for ion exchange. Due to the polarization characteristics of Li ⁺ , it can effectively reduce high temperature viscosity at high temperature. Since the present invention uses the mixed molten salt of NaNO ₃ and KNO ₃ in the strengthening process, through ion exchange between Li ⁺ in the glass and Na ⁺ in the molten salt, the depth of the compressive stress layer can be increased in a short time, so that the glass has Better mechanical shock resistance. If the content is too low, it is basically difficult for the glass to obtain higher CS _Na30 and CS _Na50 ; if the content is too high, the glass manufacturing cost will be increased, the glass expansion coefficient will increase significantly, and the glass crystallization tendency will be too high, and the probability of glass forming stone defects is obvious. Increase. Therefore, in the aluminosilicate glass, the Li ₂ O content is controlled to be 4% to 7%, specifically, including but not limited to: 4%, 5%, 6%, and 7%.

氧化钠(Na ₂O)是另一种主要的助熔剂，是进行离子交换必需的成分，能显著降低铝硅酸盐玻璃的熔化温度，也是进行离子交换必需的成分。若含量过低，不仅使玻璃的熔化性能变差，而且形成K-Na离子交换层的应力值偏小，进而导致显微硬度不佳，容易产生裂纹，耐摔性能下降；若含量过高，玻璃网络结构变差，力学、热学性能的稳定性降低，化学耐久性变差。因此，铝硅酸盐玻璃中，Na ₂O含量控制为1.5％～5.5％，具体地，包括但不限于：1.5％、2％、2.5％、3％、3.5％、4％、4.5％、5％、5.5％。 Sodium oxide (Na ₂ O) is another major flux, an essential component for ion exchange, which can significantly reduce the melting temperature of aluminosilicate glass, and is also an essential component for ion exchange. If the content is too low, not only the melting performance of the glass will be deteriorated, but also the stress value of the K-Na ion exchange layer will be too small, which will lead to poor microhardness, cracks easily, and drop resistance. The glass network structure is deteriorated, the stability of mechanical and thermal properties is reduced, and the chemical durability is deteriorated. Therefore, in the aluminosilicate glass, the Na ₂ O content is controlled to be 1.5% to 5.5%, specifically, including but not limited to: 1.5%, 2%, 2.5%, 3%, 3.5%, 4%, 4.5%, 5%, 5.5%.

氧化钾(K ₂O)能改善玻璃的熔化性能。若含量过高，则玻璃网络结构显著变差，热学性能的稳定性降低，CTE明显增大，K-Na离子交换后，CS _K偏低。因此，铝硅酸盐玻璃中，K ₂O含量控制为0.01％～0.8％，具体地，包括但不限于：0.01％、0.05％、0.1％、0.15％、0.2％、0.25％、0.3％、0.35％、0.4％、0.45％、0.5％、0.55％、0.6％、0.65％、0.7％、0.75％、0.8％。 Potassium oxide (K ₂ O) can improve the melting properties of glass. If the content is too high, the glass network structure will be significantly deteriorated, the stability of thermal properties will be reduced, the CTE will be significantly increased, and the CS _K will be low after K-Na ion exchange. Therefore, in the aluminosilicate glass, the K ₂ O content is controlled to be 0.01% to 0.8%, specifically, including but not limited to: 0.01%, 0.05%, 0.1%, 0.15%, 0.2%, 0.25%, 0.3%, 0.35%, 0.4%, 0.45%, 0.5%, 0.55%, 0.6%, 0.65%, 0.7%, 0.75%, 0.8%.

氧化镁(MgO)在高温时能降低玻璃的黏度，促进玻璃的熔化和澄清，在低温下可以增强玻璃网络空间的稳定性，对玻璃硅氧-铝氧网络结构空隙具有良好的修补作用，一定程度上可以降低玻璃的热膨胀系数，同时还可增大玻璃的低温粘度，提高玻璃应变点，是必需的成分。但其对离子交换存在一定的阻碍作用，含量过高时，Mg ²⁺严重阻碍玻璃的离子交换能力，导致K-Na交换的压应力层深度明显减小。因此，铝硅酸盐玻璃中，MgO含量控制为1％～5％，具体地，包括但不限于：1％、1.5％、2％、2.5％、3％、3.5％、4％、4.5％、5％。 Magnesium oxide (MgO) can reduce the viscosity of glass at high temperature, promote the melting and clarification of glass, and enhance the stability of glass network space at low temperature. It can reduce the thermal expansion coefficient of the glass to a certain extent, and at the same time, it can also increase the low temperature viscosity of the glass and increase the strain point of the glass, which is a necessary component. However, it has a certain hindering effect on ion exchange. When the content is too high, Mg ²⁺ seriously hinders the ion exchange capacity of the glass, resulting in a significant decrease in the depth of the compressive stress layer for K-Na exchange. Therefore, in the aluminosilicate glass, the MgO content is controlled to be 1% to 5%, specifically, including but not limited to: 1%, 1.5%, 2%, 2.5%, 3%, 3.5%, 4%, 4.5% , 5%.

氧化硼(B ₂O ₃)是良好的助熔剂，其形成的空间末端网络可以在一定范围内滑动，当玻璃存在应力时，可以获得更大的形变来缓冲，从而减少裂纹的产生，降低玻璃的弹性模量。但B ₂O ₃含量过高时，玻璃的离子交换能力显著降低。因此，铝硅酸盐玻璃中，B ₂O ₃含量控制为3.5％～6％，具体地，包括但不限于：3.5％、4％、4.5％、5％、5.5％、6％。 Boron oxide (B ₂ O ₃ ) is a good flux, and the space end network formed by it can slide within a certain range. When the glass has stress, it can obtain a larger deformation to buffer, thereby reducing the generation of cracks and reducing the glass. elastic modulus. However, when the B ₂ O ₃ content is too high, the ion exchange capacity of the glass is significantly reduced. Therefore, in the aluminosilicate glass, the content of B ₂ O ₃ is controlled to be 3.5% to 6%, specifically, including but not limited to: 3.5%, 4%, 4.5%, 5%, 5.5%, 6%.

氧化锆(ZrO ₂)能提高玻璃的化学稳定性和离子交换性能，增加玻璃表面硬度，且能提高玻璃形成裂纹所需的压力，从而使得玻璃更耐划伤和跌落，仅需少量ZrO ₂就能满足要求，因此是必需的成分。但是ZrO ₂过多会显著提高玻璃的熔化温度，同时会带来结石等缺陷，对生产带来不利影响。因此，铝硅酸盐玻璃中，ZrO ₂含量控制为0.4％～3％，具体地，包括但不限于：0.4％、1％、1.5％、2％、2.5％、3％。 Zirconia (ZrO ₂ ) can improve the chemical stability and ion exchange performance of the glass, increase the surface hardness of the glass, and increase the pressure required for the glass to form cracks, thereby making the glass more resistant to scratches and drops, and only a small amount of ZrO ₂ is needed. It satisfies the requirements and is therefore a required ingredient. However, too much ZrO ₂ will significantly increase the melting temperature of the glass, and at the same time will bring about defects such as stones, which will adversely affect the production. Therefore, in the aluminosilicate glass, the ZrO ₂ content is controlled to be 0.4% to 3%, specifically, including but not limited to: 0.4%, 1%, 1.5%, 2%, 2.5%, 3%.

进一步地，五氧化二磷(P ₂O ₅)非必需的成分，在Al ₂O ₃的含量较低时，引入一定量P ₂O ₅，它进入玻璃网络，使网络空隙比铝氧四面体更大，因此能显著增加离子交换的能力。更为重要的是，P ₂O ₅的引入可以进一步提高玻璃的应变点，能起到一定程度的减缓离子交换过程中的应力松弛问题，使强化后的表面压应力值获得较高水平。然而，过多的P ₂O ₅引入，使热膨胀系数明显增大，反而导致表面压应力值降低。因此铝硅酸盐玻璃中，P ₂O ₅含量控制为0％～4％，具体地，包括但不限于：0％、1％、1.5％、2％、2.5％、3％、3.5％、4％。作为优选地，P ₂O ₅含量为0.2％～0.47％。 Further, phosphorus pentoxide (P ₂ O ₅ ) is an optional component. When the content of Al ₂ O ₃ is low, a certain amount of P ₂ O ₅ is introduced, which enters the glass network and makes the network voids smaller than that of the aluminum oxide tetrahedron. larger, thus significantly increasing the ion exchange capacity. More importantly, the introduction of P ₂ O ₅ can further increase the strain point of the glass, which can alleviate the stress relaxation problem during the ion exchange process to a certain extent, so that the surface compressive stress value after strengthening can be obtained at a higher level. However, the introduction of too much P ₂ O ₅ significantly increases the thermal expansion coefficient, which in turn leads to a decrease in the surface compressive stress value. Therefore, in the aluminosilicate glass, the content of P ₂ O ₅ is controlled to be 0% to 4%, specifically, including but not limited to: 0%, 1%, 1.5%, 2%, 2.5%, 3%, 3.5%, 4%. Preferably, the content of P ₂ O ₅ is 0.2% to 0.47%.

氧化锌(ZnO)和氧化钙(CaO)作用与MgO类似，且在低温下可以增强玻璃网络空间的稳定性，但其对离子交换也存在明显的阻碍作用，因此都不是必需的成分。因此铝硅酸盐玻璃中，CaO含量控制为0％～4％，ZnO含量控制为0％～2％。另外，ZnO的引入可以一定程度上优化机械性能，作为优选地，ZnO的含量为0.07％～1.1％，更为优选地，ZnO的含量为0.07％～0.55％。Zinc oxide (ZnO) and calcium oxide (CaO) are similar to MgO, and can enhance the stability of the glass network space at low temperature, but they also have obvious hindering effects on ion exchange, so they are not necessary components. Therefore, in the aluminosilicate glass, the CaO content is controlled to be 0% to 4%, and the ZnO content is controlled to be 0% to 2%. In addition, the introduction of ZnO can optimize the mechanical properties to a certain extent, preferably, the content of ZnO is 0.07%-1.1%, and more preferably, the content of ZnO is 0.07%-0.55%.

进一步对上述铝硅酸盐玻璃的配方进行优化设计，以实现更优的综合性能。The formulation of the above-mentioned aluminosilicate glass is further optimized to achieve better comprehensive performance.

在其中一个具体的示例中，以重量百分比计，铝硅酸盐玻璃的组成包括：54％～58.5％的SiO ₂、25％～28％的Al ₂O ₃、4％～7％的Li ₂O、2％～6％的Na ₂O、0.01％～2％的K ₂O、1％～2.2％的MgO、0.7％～5.5％的B ₂O ₃以及0.4％～2.2％的ZrO ₂。进一步地，以重量百分比计，铝硅酸盐玻璃的组成包括：54％～57.6％的SiO ₂、25.2％～28％的Al ₂O ₃、4％～7％的Li ₂O、2.2％～3％的Na ₂O、0.3％～2％的K ₂O、1.7％～2.2％的MgO、1％～5.5％的B ₂O ₃以及0.45％～2.1％的ZrO ₂。上述组成的铝硅酸盐玻璃的能够实现更优的80目砂纸跌落高度值、环套环测试结果以及四点弯曲强度。 In one specific example, the composition of the aluminosilicate glass includes: 54%-58.5% SiO ₂ , 25%-28% Al ₂ O ₃ , 4%-7% Li ₂ in weight percentage O, 2-6% Na ₂ O, 0.01-2% K ₂ O, 1-2.2% MgO, 0.7-5.5% B ₂ O ₃ and 0.4-2.2% ZrO ₂ . Further, in terms of weight percentage, the composition of the aluminosilicate glass includes: 54%-57.6% SiO ₂ , 25.2%-28% Al ₂ O ₃ , 4%-7% Li ₂ O, 2.2%- ₃ % Na2O, 0.3% _-2 % K2O, 1.7%-2.2% MgO, ₁ % _-5.5 _% B2O3 and 0.45%-2.1% ZrO2. The aluminosilicate glass with the above composition can achieve better 80-grit sandpaper drop height value, ring-and-ring test results and four-point bending strength.

在其中一个具体的示例中，以重量百分比计，铝硅酸盐玻璃的组成包括：54％～55％的SiO ₂、26.4％～27％的Al ₂O ₃、4％～5.1％的Li ₂O、2.2％～2.9％的Na ₂O、0.3％～8％的K ₂O、1.7％～2.2％的MgO、2.4％～5.5％的B ₂O ₃以及0.45％～2.1％的ZrO ₂、0.2％～2.7％的P ₂O ₅、0.75％～1.1％的ZnO。上述组成的铝硅酸盐玻璃在能够实现更优的80目砂纸跌落高度值、环套环测试结果以及四点弯曲强度的同时，具有更低的热膨胀系数。 In one specific example, the composition of the aluminosilicate glass includes: 54%-55% SiO ₂ , 26.4%-27% Al ₂ O ₃ , 4%-5.1% Li ₂ in weight percentage O, 2.2%-2.9% Na ₂ O, 0.3%-8% K ₂ O, 1.7%-2.2% MgO, 2.4%-5.5% B ₂ O ₃ and 0.45%-2.1% ZrO ₂ , 0.2% to 2.7% of P ₂ O ₅ , 0.75% to 1.1% of ZnO. The aluminosilicate glass with the above composition can achieve better drop height value of 80-grit sandpaper, ring-and-ring test results and four-point bending strength, and at the same time has a lower coefficient of thermal expansion.

在其中一个具体的示例中，以重量百分比计，铝硅酸盐玻璃的组成包括：54％～65.1％的SiO ₂、23％～28％的Al ₂O ₃、4％～7％的Li ₂O、1.5％～6％的Na ₂O、0.01％～2.6％的K ₂O、1％～5％的MgO、0.4％～5.5％的B ₂O ₃以及0.4％～3％的ZrO ₂。进一步地，以重量百分比计，铝硅酸盐玻璃的组成包括：54.3％～63.5％的SiO ₂、23％～26.5％的Al ₂O ₃、4％～7％的Li ₂O、2％～2.6％的Na ₂O、0.01％～0.7％的K ₂O、2％～3.4％的MgO、0.5％～4.1％的B ₂O ₃以及0.55％～3％的ZrO ₂、0.5％～4％的P ₂O ₅。上述组成的铝硅酸盐玻璃的能够实现更优的DOL值。 In one specific example, the composition of the aluminosilicate glass includes: 54%-65.1% SiO ₂ , 23%-28% Al ₂ O ₃ , 4%-7% Li ₂ in weight percentage O, 1.5-6% Na ₂ O, 0.01-2.6% K ₂ O, 1-5% MgO, 0.4-5.5% B ₂ O ₃ and 0.4-3% ZrO ₂ . Further, in terms of weight percentage, the composition of the aluminosilicate glass includes: 54.3%-63.5% SiO ₂ , 23%-26.5% Al ₂ O ₃ , 4%-7% Li ₂ O, 2%- 2.6% of Na ₂ O, 0.01% to 0.7% of K ₂ O, 2% to 3.4% of MgO, 0.5% to 4.1% of B ₂ O ₃ and 0.55% to 3% of ZrO ₂ , 0.5% to 4% of P ₂ O ₅ . The aluminosilicate glass of the above-mentioned composition can achieve a better DOL value.

在其中一个具体的示例中，以重量百分比计，铝硅酸盐玻璃的组成包括：54.3％～64.5％的SiO ₂、23.1％～27.7％的Al ₂O ₃、4％～5.1％的Li ₂O、1.9％～2.9％的Na ₂O、0.3％～2.55％的K ₂O、1.1％～5％的MgO、0.55％～5.5％的B ₂O ₃以及0.45％～3％的ZrO ₂。上述组成的铝硅酸盐玻璃在能够实现更优的DOL值的同时，具有更低的热膨胀系数。 In one specific example, the composition of the aluminosilicate glass includes: 54.3%-64.5% SiO ₂ , 23.1%-27.7% Al ₂ O ₃ , 4%-5.1% Li ₂ in weight percentage O, 1.9-2.9% Na ₂ O, 0.3-2.55% K ₂ O, 1.1-5% MgO, 0.55-5.5% B ₂ O ₃ and 0.45-3% ZrO ₂ . The aluminosilicate glass with the above composition can achieve a better DOL value and at the same time have a lower coefficient of thermal expansion.

在其中一个具体的示例中，以重量百分比计，铝硅酸盐玻璃的组成包括：54％～58.5％的SiO ₂、25.2％～28％的Al ₂O ₃、4％～7％的Li ₂O、2.2％～6％的Na ₂O、0.01％～2％的K ₂O、1％～2.2％的MgO、0.7％～5.5％的B ₂O ₃以及0.4％～2.1％的ZrO ₂、0.2％～2.7％的P ₂O ₅、0.07％～2％的ZnO。进一步地，以重量百分比计，铝硅酸盐玻璃的组成包括：57.4％～58.5％的SiO ₂、25.2％～28％的Al ₂O ₃、5.4％～7％的Li ₂O、2.8％～4.1％的Na ₂O、0.01％～2％的K ₂O、1％～1.9％的MgO、0.7％～2.1％的B ₂O ₃以及0.4％～1％的ZrO ₂、0.2％～0.5％的P ₂O ₅、0.07％～0.6％的ZnO。上述组成的铝硅酸盐玻璃的能够兼具更优的DOL值以及更优的80目砂纸跌落高度值、环套环测试结果以及四点弯曲强度。 In one specific example, the composition of the aluminosilicate glass includes: 54%-58.5% SiO ₂ , 25.2%-28% Al ₂ O ₃ , 4%-7% Li ₂ in weight percentage O, 2.2%-6% Na ₂ O, 0.01%-2% K ₂ O, 1%-2.2% MgO, 0.7%-5.5% B ₂ O ₃ and 0.4%-2.1% ZrO ₂ , 0.2% to 2.7% of P ₂ O ₅ , 0.07% to 2% of ZnO. Further, in terms of weight percentage, the composition of the aluminosilicate glass includes: 57.4%-58.5% SiO ₂ , 25.2%-28% Al ₂ O ₃ , 5.4%-7% Li ₂ O, 2.8%-2.8% 4.1% of Na ₂ O, 0.01% to 2% of K ₂ O, 1% to 1.9% of MgO, 0.7% to 2.1% of B ₂ O ₃ and 0.4% to 1% of ZrO ₂ , 0.2% to 0.5% of P ₂ O ₅ and 0.07% to 0.6% of ZnO. The aluminosilicate glass with the above composition can have both better DOL value and better drop height value of 80-grit sandpaper, ring-and-ring test results and four-point bending strength.

在其中一个具体的示例中，以重量百分比计，铝硅酸盐玻璃的组成包括：58％～59％的SiO ₂、27％～28％的Al ₂O ₃、5％～6％的Li ₂O、3.5％～4.5％的Na ₂O、 0.01％～0.05％的K ₂O、0.5％～1.5％的MgO、0.7％～0.8％的B ₂O ₃以及0.4％～0.5％的ZrO ₂、0.4％～0.5％的P ₂O ₅、0.05％～0.1％的ZnO、1％～1.5％的CaO。 In one specific example, the composition of the aluminosilicate glass includes: 58%-59% SiO ₂ , 27%-28% Al ₂ O ₃ , 5%-6% Li ₂ in weight percentage O, 3.5%-4.5% Na ₂ O, 0.01%-0.05% K ₂ O, 0.5%-1.5% MgO, 0.7%-0.8% B ₂ O ₃ and 0.4%-0.5% ZrO ₂ , 0.4%-0.5% P ₂ O ₅ , 0.05%-0.1% ZnO, 1%-1.5% CaO.

在其中一个具体的示例中，以重量百分比计，铝硅酸盐玻璃的组成包括：57％～58％的SiO ₂、24.5％～25.5％的Al ₂O ₃、6.5％～7％的Li ₂O、2.5％～3.5％的Na ₂O、1.5％～2.5％的K ₂O、1.5％～2.5％的MgO、1％～3％的B ₂O ₃以及0.5％～1.5％的ZrO ₂、0.1％～0.4％的P ₂O ₅、0.5％～0.6％的ZnO。 In one specific example, the composition of the aluminosilicate glass includes: 57%-58% SiO ₂ , 24.5%-25.5% Al ₂ O ₃ , 6.5%-7% Li ₂ in weight percentage O, 2.5%-3.5% Na ₂ O, 1.5%-2.5% K ₂ O, 1.5%-2.5% MgO, 1%-3% B ₂ O ₃ and 0.5%-1.5% ZrO ₂ , 0.1%-0.4% P ₂ O ₅ , 0.5%-0.6% ZnO.

在其中一个具体的示例中，以重量百分比计，铝硅酸盐玻璃的组成包括：54％～56％的SiO ₂、26％～27％的Al ₂O ₃、4％～4.5％的Li ₂O、1.5％～2.5％的Na ₂O、0.1％～0.5％的K ₂O、1.5％～2.5％的MgO、2％～3％的B ₂O ₃以及0.45％～0.55％的ZrO ₂、2.5％～3.5％的P ₂O ₅、0.5％～1.5％的ZnO、2％～3％的CaO。 In one specific example, the composition of the aluminosilicate glass includes: 54%-56% SiO ₂ , 26%-27% Al ₂ O ₃ , 4%-4.5% Li ₂ in weight percentage O, 1.5%-2.5% Na ₂ O, 0.1%-0.5% K ₂ O, 1.5%-2.5% MgO, 2%-3% B ₂ O ₃ and 0.45%-0.55% ZrO ₂ , 2.5%-3.5% _P2O5 , _0.5 %-1.5% ZnO, 2%-3% CaO.

在其中一个具体的示例中，以重量百分比计，铝硅酸盐玻璃的组成包括：53.5％～54.5％的SiO ₂、26.5％～27.5％的Al ₂O ₃、4.5％～5.5％的Li ₂O、2.5％～3.5％的Na ₂O、0.75％～0.85％的K ₂O、1％～2.5％的MgO、5％～6％的B ₂O ₃以及1.5％～2.5％的ZrO ₂、0.2％～0.3％的P ₂O ₅、0.5％～1％的ZnO。 In one specific example, the composition of the aluminosilicate glass includes: 53.5%-54.5% SiO ₂ , 26.5%-27.5% Al ₂ O ₃ , 4.5%-5.5% Li ₂ in weight percentage O, 2.5%-3.5% Na ₂ O, 0.75%-0.85% K ₂ O, 1%-2.5% MgO, 5%-6% B ₂ O ₃ and 1.5%-2.5% ZrO ₂ , 0.2% to 0.3% of P ₂ O ₅ , 0.5% to 1% of ZnO.

在其中一个具体的示例中，以重量百分比计，铝硅酸盐玻璃的组成包括：56％～57％的SiO ₂、26.5％～27.5％的Al ₂O ₃、4.5％～6％的Li ₂O、5.5％～6.5％的Na ₂O、0.2％～0.35％的K ₂O、1％～1.5％的MgO、1％～2％的B ₂O ₃以及0.4％～1％的ZrO ₂、0.3％～0.5％的P ₂O ₅、1.5％～2％的ZnO。 In one specific example, the composition of the aluminosilicate glass includes: 56%-57% SiO ₂ , 26.5%-27.5% Al ₂ O ₃ , 4.5%-6% Li ₂ in weight percentage O, 5.5%-6.5% Na ₂ O, 0.2%-0.35% K ₂ O, 1%-1.5% MgO, 1%-2% B ₂ O ₃ and 0.4%-1% ZrO ₂ , 0.3% to 0.5% of P ₂ O ₅ , 1.5% to 2% of ZnO.

为了在现有技术的基础上进一步提高铝硅酸盐强化玻璃的机械性能，以满足粗糙地面跌落、环套环测试以及四点弯曲强度测试等特殊性能测试的要求。本发明主要从两方面进行考量：其一，提高离子交换性能，优化压缩应力层的分布特性，增加表面压应力层厚度，即DOL值增大；其二，提高玻璃断裂韧性，合理控制中心张应力的大小，有效控制因局部大裂纹的向内扩展而造成的缓慢破碎等问题。在进一步的研究中，发明人发现，在强化工艺后，尤其玻璃厚度小于0.5mm的情况下，玻璃内部容易形成过大的中间张应力层。过大的中间张应力会带来两种潜在的风险，其一：容易发生自爆，同时强化后的玻璃抗粗糙地面的跌落破碎性能明显降低，玻璃内部较大的中间张应力值容易诱导玻璃表面微裂纹的裂纹扩展，当受到不大的外力冲击时，更容易发生破碎；其二，玻璃厚度越薄，中间张应力值越容易突破理想阈值，因此使得玻璃无法在更深的浅表层形成压应力，也就说表面压应力层的深度会随着玻璃厚度的减薄，DOL值发生明显衰减，甚至低于100μm。In order to further improve the mechanical properties of aluminosilicate tempered glass on the basis of the existing technology, it can meet the requirements of special performance tests such as rough ground drop, ring ring test and four-point bending strength test. The present invention mainly considers two aspects: firstly, improving the ion exchange performance, optimizing the distribution characteristics of the compressive stress layer, increasing the thickness of the surface compressive stress layer, that is, increasing the DOL value; secondly, improving the fracture toughness of the glass and reasonably controlling the center tension The size of the stress can effectively control the slow breakage caused by the inward expansion of local large cracks. In further research, the inventor found that after the strengthening process, especially when the glass thickness is less than 0.5 mm, an excessively large intermediate tensile stress layer is easily formed inside the glass. Excessive intermediate tensile stress will bring two potential risks. One is that it is prone to self-explosion. At the same time, the drop resistance of the strengthened glass against rough ground is significantly reduced, and the large intermediate tensile stress value inside the glass is easy to induce the glass surface. The crack propagation of micro-cracks is more likely to break when subjected to a small external force impact; secondly, the thinner the glass thickness, the easier the intermediate tensile stress value exceeds the ideal threshold, so that the glass cannot form compressive stress in the deeper shallow surface layer. , that is to say, the depth of the surface compressive stress layer will decrease with the thickness of the glass, and the DOL value will be significantly attenuated, even below 100 μm.

基于此，本发明首先调整了铝硅酸盐玻璃的组成，各组成相配合有利于离子迁移，且能够有效保证玻璃网络结构的稳定性，提高玻璃体系的机械性能，且当玻璃存在应力时，可以获得更大的形变来缓冲。以此配方设计结合一步法复合型离子交换化学强化工艺，同时进行Li-Na和Na-K的离子交换，由此形成的表面压应力层为复合梯度型压应力层，Na-K的离子交换层靠近玻璃表面，Li-Na的离子交换层更靠近玻璃内层，且获得的D _Li-Na/D _Na-K在合理范围，例如：当Li-Na的离子交换层的深度为120μm时，Na-K的离子交换层深度为5μm～15μm范围内。同时，当玻璃厚度为0.33mm时，玻璃表面压应力层深度依然不低于100μm，且表面压应力值CS _K不低于800MPa，中间张应力可高于180MPa。由于玻璃自身具有优良的断裂韧性，使玻璃盖板产品的厚度在0.33mm～0.4mm时，依然具有优异的抗粗糙地面跌落破碎性能和更好的抗力学冲击的稳定性。 Based on this, the present invention firstly adjusts the composition of the aluminosilicate glass. The coordination of each composition is conducive to ion migration, and can effectively ensure the stability of the glass network structure, improve the mechanical properties of the glass system, and when the glass has stress, A larger deformation can be obtained to cushion. This formula design is combined with the one-step composite ion exchange chemical strengthening process, and the ion exchange of Li-Na and Na-K is carried out at the same time. The surface compressive stress layer formed is a composite gradient compressive stress layer, and the ion exchange of Na-K is carried out. The ion exchange layer of Li-Na is closer to the inner glass layer, and the obtained D _Li-Na /D _Na-K is in a reasonable range, for example: when the depth of the ion exchange layer of Li-Na is 120 μm, The depth of the ion exchange layer of Na-K is in the range of 5 μm to 15 μm. At the same time, when the glass thickness is 0.33mm, the depth of the compressive stress layer on the glass surface is still not less than 100μm, the surface compressive stress value CS _K is not less than 800MPa, and the intermediate tensile stress can be higher than 180MPa. Due to the excellent fracture toughness of the glass itself, when the thickness of the glass cover product is 0.33mm ~ 0.4mm, it still has excellent resistance to rough ground drop and broken performance and better stability against mechanical impact.

同时，本发明的铝硅酸盐强化玻璃在极短的化学强化时间内具有极佳的离子交换效率，同时当玻璃厚度发生改变时，应力层分布特性不会发生本质改变，满足如下应力层分布：厚度0.7mm时，CS _Na30≥250MPa、CS _Na50≥150MPa、 CS _K≥800MPa、DOL≥120μm、DOL _K≥4.5μm；厚度0.33mm时，CS _Na30≥200MPa、CS _Na50≥100MPa、CS _K≥800MPa、DOL≥100μm、DOL _K≥3.5μm。从而使玻璃具备高强的抗力学冲击性能、表面硬度和断裂韧性，进而满足粗糙地面跌落、环套环测试以及四点弯曲强度测试等特殊性能测试的要求。 At the same time, the aluminosilicate strengthened glass of the present invention has excellent ion exchange efficiency in a very short chemical strengthening time, and at the same time, when the thickness of the glass changes, the distribution characteristics of the stress layer will not change substantially, and the following stress layer distribution is satisfied : When the thickness is 0.7mm, CS _Na30 ≥250MPa, CS _Na50 ≥150MPa, CS _K ≥800MPa, DOL≥120μm, DOL _K ≥4.5μm; when the thickness is 0.33mm, CS _Na30 ≥200MPa, CS _Na50 ≥100MPa, CS _K ≥800MPa , DOL≥100μm, _DOLK ≥3.5μm. As a result, the glass has high-strength mechanical impact resistance, surface hardness and fracture toughness, and then meets the requirements of special performance tests such as rough ground drop, ring collar test and four-point bending strength test.

另外，传统方法在进行强化时，通常采用一步离子交换、二步离子交换或者多步离子交换法进行化学强化处理，所采用的熔盐可以为纯KNO ₃熔盐、纯NaNO ₃熔盐或者KNO ₃与NaNO ₃的混合熔盐，比例范围在100:0～40:60之间，根据其玻璃特性可以选定最优的熔盐配方。然而，在实际生产过程中，纯KNO ₃熔盐、纯NaNO ₃熔盐或者KNO ₃与NaNO ₃的混合熔盐在使用一段时间以后，其浓度将发生明显偏差，一旦熔盐中Na ⁺浓度和Li ⁺浓度的偏差值超过一定范围，强化性能无法保证，进而严重影响加工良率，需要对熔盐进行更换，影响生产效率，导致生产成本增加。本发明涉及的技术方案，采用特殊的玻璃化学组成配合一步法离子交换化学强化工艺，不同的玻璃组成可以获得最优的混合熔盐配比，该用于离子交换的熔盐配比可在2％的范围内进行波动，其强化性能中CS值的波动范围在2.5％以内，DOL的波动范围在1％以内。换而言之，本发明涉及的技术方案中，用于离子交换的熔盐的Na ⁺浓度的变化值可为20000ppm。同时，所涉及的强化工艺时间控制在180min以内，有效控制了离子过渡交换的情况，大大延长了熔盐使用寿命，可以提高生产效率和加工良率，也可降低生产成本。 In addition, traditional methods usually use one-step ion exchange, two-step ion exchange or multi-step ion exchange for chemical strengthening treatment, and the molten salt used can be pure KNO ₃ molten salt, pure NaNO ₃ molten salt or KNO ₃ and NaNO ₃ mixed molten salt, the ratio range is between 100:0 ~ 40:60, and the optimal molten salt formula can be selected according to its glass properties. However, in the actual production process, the concentration of pure KNO ₃ molten salt, pure NaNO ₃ molten salt or mixed molten salt of KNO ₃ and NaNO ₃ will be significantly deviated after a period of use ^. If the deviation value of Li ⁺ concentration exceeds a certain range, the strengthening performance cannot be guaranteed, which will seriously affect the processing yield, and the molten salt needs to be replaced, which affects the production efficiency and increases the production cost. The technical scheme involved in the present invention adopts special glass chemical composition and one-step ion exchange chemical strengthening process, and different glass compositions can obtain the optimal mixed molten salt ratio, and the molten salt ratio for ion exchange can be in 2 The fluctuation range of CS value in its enhanced performance is within 2.5%, and the fluctuation range of DOL is within 1%. In other words, in the technical solution of the present invention, the change value of the Na ⁺ concentration of the molten salt used for ion exchange can be 20000 ppm. At the same time, the strengthening process time involved is controlled within 180 minutes, which effectively controls the ion transition exchange, greatly prolongs the service life of the molten salt, improves production efficiency and processing yield, and reduces production costs.

本发明还提供所述的铝硅酸盐强化玻璃的制备方法，包括如下步骤：The present invention also provides the preparation method of the aluminosilicate reinforced glass, comprising the following steps:

按照上述铝硅酸盐玻璃的组成混合各原料，并进行熔制处理，然后退火、成型，制备铝硅酸盐玻璃；以及The raw materials are mixed according to the composition of the above-mentioned aluminosilicate glass, and subjected to a melting process, followed by annealing and molding to prepare aluminosilicate glass; and

将铝硅酸盐玻璃浸入NaNO ₃和KNO ₃混合熔盐中进行离子交换，制备所述的铝硅酸盐强化玻璃。 The aluminosilicate glass was immersed in a mixed molten salt of NaNO ₃ and KNO ₃ for ion exchange to prepare the aluminosilicate reinforced glass.

本发明涉及的铝硅酸盐玻璃的具体制备过程，可以在传统平板玻璃制造工艺过程获得玻璃，其制造工艺不限于浮法成形工艺、溢流下拉法、引上法、平拉法、压延法等。The specific preparation process of the aluminosilicate glass involved in the present invention can be obtained in the traditional flat glass manufacturing process, and the manufacturing process is not limited to the float forming process, the overflow down-drawing method, the drawing-up method, the flat-drawing method and the calendering method. Wait.

在其中一个示例中，熔制处理的温度为1500℃～1700℃。In one example, the temperature of the melting process is 1500°C to 1700°C.

在其中一个示例中，退火的温度为550℃～750℃。In one example, the annealing temperature is 550°C to 750°C.

在其中一个示例中，以质量百分含量计，熔盐包括3％～15％的NaNO ₃和85％～97％的KNO ₃。如果NaNO ₃的质量百分数过低，则Li-Na的离子交换速率过慢，且容易发生K+的表面富集，阻塞Li-Na的离子交换；如果过高，则Na-K离子交换效率将显著降低，导致玻璃表面无法形成较高的压应力。 In one example, the molten salt includes 3%-15% NaNO ₃ and 85%-97% KNO ₃ in terms of mass percentage. If the mass percentage of NaNO ₃ is too low, the ion exchange rate of Li-Na is too slow, and the surface enrichment of K+ is likely to occur, blocking the ion exchange of Li-Na; if it is too high, the Na-K ion exchange efficiency will be significantly decreased, resulting in the inability to form a higher compressive stress on the glass surface.

在其中一个示例中，离子交换的温度为390℃～460℃。如果温度过低，则离子交换速率过于缓慢，需要增加强化时间才能获得可接受的机械性能；若过高，则易发生应力松弛现象导致CS下降，在应力层深度达到客户要求的前提下，较难获得更大CS值，且高强化温度容易造成玻璃翘曲、自爆等良率下降的问题。具体地，离子交换的温度包括但不限于：390℃、400℃、410℃、420℃、430℃、440℃。In one example, the temperature of the ion exchange is 390°C to 460°C. If the temperature is too low, the ion exchange rate is too slow, and it is necessary to increase the strengthening time to obtain acceptable mechanical properties; if the temperature is too high, stress relaxation is likely to occur, resulting in a decrease in CS. It is difficult to obtain a larger CS value, and the high strengthening temperature is likely to cause problems such as glass warpage and self-explosion, and the yield declines. Specifically, the temperature of ion exchange includes but is not limited to: 390°C, 400°C, 410°C, 420°C, 430°C, and 440°C.

在其中一个示例中，离子交换的时间为120min～180min。若离子交换时间过短，则离子交换程度不足，CS与DOL值无法达到预期；若离子交换时间过长，对DOL无明显提升效果，但应力值会显著降低，离子过渡交换并伴随着应力松弛，容易在玻璃内部产生不可逆的结构缺陷。具体地，离子交换的时间包括但不限于：120min、125min、130min、135min、140min、145min、150min、155min、160min、165min、170min、175min、180min。In one example, the time for ion exchange is 120 min to 180 min. If the ion exchange time is too short, the degree of ion exchange will be insufficient, and the CS and DOL values will not meet expectations; if the ion exchange time is too long, the DOL will not be significantly improved, but the stress value will be significantly reduced. , it is easy to produce irreversible structural defects inside the glass. Specifically, the time of ion exchange includes but is not limited to: 120min, 125min, 130min, 135min, 140min, 145min, 150min, 155min, 160min, 165min, 170min, 175min, 180min.

本发明还提供一种玻璃保护层，包括上述的铝硅酸盐强化玻璃。具体地，该玻璃保护层可以为玻璃盖板，特别是电子触摸屏盖板，也可以为高铁地铁、航空航天、深海探测设备及其他特种设备等电子产品的玻璃盖板。The present invention also provides a glass protective layer comprising the above-mentioned aluminosilicate reinforced glass. Specifically, the glass protective layer can be a glass cover plate, especially an electronic touch screen cover plate, or a glass cover plate of electronic products such as high-speed railway, aerospace, deep-sea detection equipment and other special equipment.

以下为具体的实施例。The following are specific examples.

在表1中，适当地选择常用的玻璃原料诸如氧化物和碳酸盐等，以具有表中所示的组成，称量以制得大于1000g的配合料，充分搅拌混合。将配合料混合物放入大于400mL铂金坩埚中，将铂金坩埚放入硅钼炉中，升温至1670℃，并熔融澄清8小时以上，使其均化并浇铸到模具中，在750℃以下的退火温度下进行精密退火，随后获得块状玻璃。将该块状玻璃进行精密线切割，并对两个表面均进行研磨和抛光，获得对角线长度尺寸为6寸、厚度为0.7的主流盖板厚度和0.33mm的主流保护贴片的超薄玻璃。In Table 1, commonly used glass raw materials such as oxides and carbonates are appropriately selected to have the compositions shown in the table, weighed to obtain batches of more than 1000 g, and thoroughly mixed with stirring. Put the batch mixture into a platinum crucible larger than 400mL, put the platinum crucible into a silicon molybdenum furnace, heat it up to 1670°C, melt and clarify it for more than 8 hours, homogenize it and cast it into a mold, and anneal it below 750°C Precision annealing is carried out at the temperature, and then a bulk glass is obtained. The block glass is subjected to precision wire cutting, and both surfaces are ground and polished to obtain an ultra-thin mainstream cover plate thickness of 6 inches, a thickness of 0.7, and a mainstream protective patch of 0.33mm. Glass.

以上超薄玻璃的尺寸和厚度可以根据电子产品终端客户的需求进行任意调整，厚度范围为0.2～1.1mm，尺寸范围为4～20寸。The size and thickness of the above ultra-thin glass can be adjusted arbitrarily according to the needs of end customers of electronic products, the thickness range is 0.2~1.1mm, and the size range is 4~20 inches.

在经过化学强化之前，可以对玻璃背板进行2.5D抛光、3D热弯等加工工艺以满足电子产品的外观设计的需求。再将上述玻璃进行特殊的一步法离子交换，待其冷却后，用超声波清洗机清洗1小时以洗去玻璃表面残留的熔盐，烘干后待测试。Before chemical strengthening, 2.5D polishing, 3D hot bending and other processing processes can be performed on the glass backplane to meet the needs of the appearance design of electronic products. The above glass is then subjected to a special one-step ion exchange. After cooling, it is cleaned with an ultrasonic cleaner for 1 hour to wash off the residual molten salt on the glass surface, and it is tested after drying.

对未经过离子交换的玻璃原片进行高温黏度测试，使用美国ORTON的高温黏度仪进行测试，确定玻璃的熔化澄清温度T _m(10 ²dPa.s)；对紧密切割的玻璃样品进行热膨胀性能测试，采用德国耐驰的PC402L卧式膨胀仪进行测试，确定玻璃化转变的温度Tg(10 ^13.4dPa.s)、热膨胀性能(35℃～350℃)；对经过了氧化铈抛光后的具有镜面表面的玻璃样品使用荷兰轶诺的FALCON400硬度计测试表面维氏硬度。 The high temperature viscosity test was carried out on the original glass sheet without ion exchange, and the high temperature viscometer of ORTON in the United States was used to test to determine the melting and clarification temperature T _m (10 ² dPa.s) of the glass; the thermal expansion performance test was carried out on the tightly cut glass samples , using the German NETZSCH PC402L horizontal dilatometer to test to determine the glass transition temperature Tg (10 ^13.4 dPa.s), thermal expansion performance (35 ℃ ~ 350 ℃); for the mirror surface after cerium oxide polishing The glass samples were tested for surface Vickers hardness using a FALCON400 hardness tester from INNO from the Netherlands.

分别对各实施例的强化玻璃进行钢化应力测试，结果如表1～4所示。采用的仪器为FSM-6000LE双折射应力仪和散乱光光弹性应力仪SLP-1000分别对经过离子交换的各实施例的强化玻璃进行CS与DOL的测试。利用双折射成像***，特定波长的偏正光穿过具有应力梯度的玻璃，产生折射光程差，计算相关应力分布指标：CS _Na30、CS _Na50、CS _K、DOL、DOL _K。 The tempering stress test was performed on the tempered glass of each embodiment, and the results are shown in Tables 1-4. The instruments used are FSM-6000LE birefringence stress meter and scattered photoelastic stress meter SLP-1000 to conduct CS and DOL tests on the ion-exchanged tempered glass of each embodiment respectively. Using the birefringence imaging system, the polarized light of a specific wavelength passes through the glass with a stress gradient to generate a refractive optical path difference, and calculate the relevant stress distribution indicators: CS _Na30 , CS _Na50 , CS _K , DOL, DOL _K .

注：CS _Na30是指强化玻璃样品经过混合盐强化后，其30微米深度位置的压应力值，由于其压应力值主要是通过强化盐中的Na离子交换玻璃中的Li离子，因此叫做CS _Na30； Note: CS _Na30 refers to the compressive stress value of the tempered glass sample at a depth of 30 microns after being strengthened by mixed salts. Since its compressive stress value is mainly due to the Na ion in the tempered salt exchanging Li ions in the glass, it is called CS _Na30 ;

CS _Na50，同理CS _Na30，是指强化玻璃50微米深度位置的压应力值； CS _Na50 , the same as CS _Na30 , refers to the compressive stress value of the strengthened glass at a depth of 50 microns;

CS _K是指强化玻璃表面的压应力值，由于其主要通过强化盐中的K离子置换玻璃中的Na离子，因此叫做CS _k； CS _K refers to the compressive stress value on the surface of the strengthened glass, because it mainly replaces the Na ions in the glass by the K ions in the strengthened salt, so it is called CS _k ;

DOL是指强化玻璃压应力深度；DOL refers to the compressive stress depth of strengthened glass;

CT是指强化玻璃中心的张应力值；CT refers to the tensile stress value in the center of the strengthened glass;

DOL _K是指强化玻璃表层高压缩应力层的深度，其主要是通过强化盐中的K离子置换玻璃中的Na离子，因此叫做DOL _K，也叫K应力深度。 DOL _K refers to the depth of the high compressive stress layer on the surface of the strengthened glass, which mainly replaces the Na ions in the glass by the K ions in the strengthened salt, so it is called DOL _K , also called the K stress depth.

通过普赛特的PT-307A万能试验机测试四点弯曲强度和环套环静压测试，深圳高品的GP-2112-T定向跌落测试仪测试180目砂纸跌落高度，记录于下表1～4中。The PT-307A universal testing machine of Prosett was used to test the four-point bending strength and the static pressure test of the ring and the ring. 4 in.

表1Table 1

表2Table 2

表3table 3

表4Table 4

以上所述实施例的各技术特征可以进行任意的组合，为使描述简洁，未对上述实施例中的各个技术特征所有可能的组合都进行描述，然而，只要这些技术特征的组合不存在矛盾，都应当认为是本说明书记载的范围。The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity, all possible combinations of the technical features in the above-described embodiments are not described. However, as long as there is no contradiction between the combinations of these technical features, All should be regarded as the scope described in this specification.

以上所述实施例仅表达了本发明的几种实施方式，其描述较为具体和详细，但并不能因此而理解为对发明专利范围的限制。应当指出的是，对于本领域的普通技术人员来说，在不脱离本发明构思的前提下，还可以做出若干变形和改进，这些都属于本发明的保护范围。因此，本发明专利的保护范围应以所附权利要求为准。The above-mentioned embodiments only represent several embodiments of the present invention, and the descriptions thereof are specific and detailed, but should not be construed as a limitation on the scope of the invention patent. It should be pointed out that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can also be made, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention should be subject to the appended claims.

Claims

一种铝硅酸盐强化玻璃，其特征在于，采用NaNO ₃和KNO ₃混合熔盐对铝硅酸盐玻璃进行一步强化；以重量百分比计，所述铝硅酸盐玻璃的组成包括： An aluminosilicate reinforced glass, characterized in that the aluminosilicate glass is strengthened in one step by using a mixed molten salt of NaNO ₃ and KNO ₃ ; in weight percentage, the composition of the aluminosilicate glass includes:

53％～66％的SiO ₂、23％～28％的Al ₂O ₃、4％～7％的Li ₂O、1.5％～7％的Na ₂O、0.01％～3％的K ₂O、1％～5％的MgO、0.4％～6％的B ₂O ₃以及0.4％～3％的ZrO ₂。 53%-66% SiO ₂ , 23%-28% Al ₂ O ₃ , 4%-7% Li ₂ O, 1.5%-7% Na ₂ O, 0.01%-3% K ₂ O, 1% to 5% of MgO, 0.4% to 6% of B ₂ O ₃ and 0.4% to 3% of ZrO ₂ .
根据权利要求1所述的铝硅酸盐强化玻璃，其特征在于，以重量百分比计，所述铝硅酸盐玻璃的组成还包括重量百分含量≤4％的P ₂O ₅；及/或 The aluminosilicate strengthened glass according to claim 1, characterized in that, by weight percentage, the composition of the aluminosilicate glass further comprises P ₂ O ₅ with a weight percentage of ≤4%; and/or

所述铝硅酸盐玻璃的组成还包括重量百分含量≤3％的CaO；及/或The composition of the aluminosilicate glass further includes CaO with a weight percentage content of ≤3%; and/or

所述铝硅酸盐玻璃的组成还包括重量百分含量≤2％的ZnO。The composition of the aluminosilicate glass also includes ZnO with a weight percentage content of ≤2%.
根据权利要求2所述的铝硅酸盐强化玻璃，其特征在于，所述铝硅酸盐玻璃的组成中ZnO的重量百分比含量为0.07％～1.1％。The aluminosilicate tempered glass according to claim 2, characterized in that the weight percent content of ZnO in the composition of the aluminosilicate glass is 0.07% to 1.1%.
根据权利要求2所述的铝硅酸盐强化玻璃，其特征在于，所述铝硅酸盐玻璃的组成中ZnO的重量百分比含量为0.07％～0.55％。The aluminosilicate tempered glass according to claim 2, characterized in that the weight percent content of ZnO in the composition of the aluminosilicate glass is 0.07% to 0.55%.
根据权利要求2所述的铝硅酸盐强化玻璃，其特征在于，所述铝硅酸盐玻璃的组成中P ₂O ₅的重量百分比含量为0.2％～0.47％。 The aluminosilicate tempered glass according to claim 2, characterized in that, in the composition of the aluminosilicate glass, the weight percent content of P ₂ O ₅ is 0.2% to 0.47%.
权利要求1～5任一项所述的铝硅酸盐强化玻璃的制备方法，其特征在于，包括如下步骤：The method for preparing aluminosilicate reinforced glass according to any one of claims 1 to 5, characterized in that it comprises the following steps:

按照所述铝硅酸盐玻璃的组成混合各原料，并进行熔制处理，然后退火、成型，制备所述铝硅酸盐玻璃；The raw materials are mixed according to the composition of the aluminosilicate glass, and subjected to melting treatment, followed by annealing and molding to prepare the aluminosilicate glass;

将所述铝硅酸盐玻璃浸入NaNO ₃和KNO ₃混合熔盐中进行离子交换，制备所述的铝硅酸盐强化玻璃。 The aluminosilicate glass is immersed in a mixed molten salt of NaNO ₃ and KNO ₃ for ion exchange to prepare the aluminosilicate reinforced glass.
根据权利要求6所述的铝硅酸盐强化玻璃的制备方法，其特征在于，所述熔制处理的温度为1500℃～1700℃；及/或The method for preparing aluminosilicate tempered glass according to claim 6, wherein the temperature of the melting treatment is 1500°C to 1700°C; and/or

所述退火的温度为550℃～750℃。The temperature of the annealing is 550°C to 750°C.
根据权利要求6或7所述的铝硅酸盐强化玻璃的制备方法，其特征在于，以质量百分含量计，所述熔盐包括3％～15％的NaNO ₃和85％～97％的KNO ₃；及/或所述离子交换的温度为390℃～460℃。 The method for preparing aluminosilicate reinforced glass according to claim 6 or 7, characterized in that, in terms of mass percentage, the molten salt comprises ₃ %-15% NaNO3 and 85%-97% NaNO3 KNO ₃ ; and/or the temperature of the ion exchange is 390°C to 460°C.
根据权利要求6或7所述的铝硅酸盐强化玻璃的制备方法，其特征在于，所述离子交换的时间为120min～180min。The method for preparing aluminosilicate reinforced glass according to claim 6 or 7, wherein the time of the ion exchange is 120 min to 180 min.
一种玻璃保护层，其特征在于，包括权利要求1～5任一项所述的铝硅酸盐强化玻璃。A glass protective layer, characterized by comprising the aluminosilicate tempered glass according to any one of claims 1 to 5.
一种玻璃盖板，其特征在于，包括权利要求1～5任一项所述的铝硅酸盐强化玻璃。A glass cover plate, characterized by comprising the aluminosilicate tempered glass according to any one of claims 1 to 5.
一种电子产品，其特征在于，以权利要求1～5任一项所述的铝硅酸盐强化玻璃作为玻璃盖板。An electronic product, characterized in that the aluminosilicate tempered glass according to any one of claims 1 to 5 is used as a glass cover plate.