共查询到20条相似文献,搜索用时 203 毫秒
1.
《玻璃与搪瓷》2020,(1)
将抛光气氛面(A)、抛光锡面(B)和原片(C)超薄浮法铝硅酸盐玻璃在相同化学强化条件(420℃/5h)下化学强化,分析比较化学强化指标(CS、DOL)、翘曲变形量(Wv)、气氛面与锡面的化学组成,发现A的气氛面Na_2O含量高于锡面,B和C的气氛面Na_2O含量均低于锡面;A气氛面CS大于锡面,B、C气氛面CS均小于锡面,A、C气氛面DOL均略大于锡面,B气氛面DOL略小于锡面,但是DOL相差很小;三种样品的翘曲值依次为BCA,且翘曲方向均为向空气面凸起。另外将未经处理的原片在相同条件下(420℃/4h)进行强化,然后分别抛光气氛面(D)和锡面(E),并分析比较化学强化指标(CS、DOL)、翘曲变形量(Wv)。发现D气氛面CS小于锡面,向气氛面凸起,且翘曲值大于未抛光的样品;E气氛面CS大于锡面,向锡面凸起,且翘曲值小于未抛光的样品。实验结果表明浮法超薄铝硅酸盐玻璃两面CS值差异是引起化学强化翘曲变形的一个重要原因。根据本研究结果,控制超薄浮法铝硅酸盐玻璃气氛面CS值大于锡面是减少化学强化翘曲变形值的有效手段。 相似文献
2.
超薄高强屏幕保护玻璃是触控显示产品的重要保护材料,也是当前较为热门的玻璃品种。超薄屏幕保护玻璃经过多年技术开发和产品迭代更新,已经发展成具有不同组分特点的碱铝硅酸盐系列产品。本文梳理了国内外屏幕保护玻璃产品发展及其迭代历程,总结了不同类型的碱铝硅玻璃产品化学组成特点,分析了不同产品对应的化学强化工艺技术,重点论述了国内外屏幕保护材料用高强透明微晶玻璃的研究现状,同时展望了微晶玻璃未来发展方向,为今后屏幕保护玻璃研发提供借鉴与参考。 相似文献
3.
4.
5.
6.
7.
8.
9.
移动通信的发展使人们对移动电子设备的需求大大增加,也给相应的盖板玻璃行业带来繁荣。各个玻璃厂商都基于传统铝硅酸盐玻璃推出了自己的优质产品,然而通过调整配方、改进化学钢化制度等传统方式来进一步提高玻璃性能正变得困难。近期通过晶化增强玻璃力学性能的透明微晶玻璃引起了行业的广泛关注。本文首先回顾已成熟的化学钢化工艺,并介绍其在高碱铝硅玻璃上的应用。随后介绍应用于盖板玻璃的透明铝硅酸盐微晶玻璃。最后,对传统钢化玻璃、新型透明微晶玻璃的研究以及未来的发展趋势进行总结。 相似文献
10.
11.
Guglielmo Macrelli John C. Mauro Arun K. Varshneya 《Journal of the American Ceramic Society》2021,104(11):5599-5613
The chemical strengthening of glass results from an ion exchange process in which smaller alkali ions in a glass are replaced with larger alkali ions from a molten salt bath. This interdiffusion process leads to a buildup of chemical stress in the glass. However, traditional modeling of the ion exchange process has not fully accounted for interaction effects between mass diffusion and the chemical stress developed during the process. In this study, we develop the general theory of coupling between diffusion and stress, resulting in a single flux equation with a concentration- and stress-dependent interdiffusion coefficient. We apply the theory to the specific cases of chemically strengthened soda lime silicate and aluminosilicate glasses, demonstrating the impact of interaction terms on concentration profiles and interdiffusion coefficient. Following a phenomenological approach, this study demonstrates the effect of the interdiffusion on stress generation and vice versa to account for deviations from the simple expressions published hitherto in the literature. 相似文献
12.
13.
14.
通过对玻璃进行了离子交换实验,研究P2O5含量变化对铝硅酸盐玻璃离子交换性能的影响.利用显微硬度仪、表面应力仪、微区X射线荧光光谱仪和场发射扫描电子显微镜线扫分别表征了离子交换玻璃的硬度、表面应力、元素含量变化和离子交换深度等性能.结果表明:离子交换后玻璃表面的K+含量明显增加,Na+含量降低,玻璃表面发生了明显的离子交换.此外,随着P2O5含量的增加,离子交换后的玻璃的硬度、表面应力和离子交换层深度逐渐增加.实验结果证明P2O5的引入能有效促进铝硅酸盐玻璃离子交换. 相似文献
15.
Molecular dynamics study of correlations between IR peak position and bond parameters of silica and silicate glasses: Effects of temperature and stress 下载免费PDF全文
Scott T. Milner Carlo G. Pantano Seong H. Kim 《Journal of the American Ceramic Society》2018,101(1):178-188
In the IR spectra of the silica and silicate glasses, the shifts of the maximum intensity position of the νSi–O–Si,as band upon heating or applying mechanical stress could be attributed to changes in the distribution of bond parameters such as bond length and bond angle. Upon heating, isotropic expansion occurs and the density changes; upon applying mechanical stress, anisotropic strain is induced and a significant change in the Si–O–Si bond angle is observed. From molecular dynamics simulations of a silica glass, we show that the peak position shift correlates better with the asymmetric change in the Si–O bond length distribution, rather than the Si–O–Si bridge angle, the O–Si–O tetrahedral angle, or the density change. This new finding provides an insight into how and why the νSi–O–Si,as IR peak of soda lime silica (SLS) glass shifts upon chemical strengthening via ion exchange and thermal tempering. 相似文献
16.
玻璃的理论强度很高,但由于原料组成、熔化、成形和退火等各工艺过程的影响,玻璃的实际强度比理论值要低很多。采用表面化学增强技术,能够降低玻璃的表面缺陷,提升玻璃的力学强度、表面硬度、耐划伤等性能。玻璃表面化学增强技术有离子交换法、表面化学抛光、脱碱增强法、表面涂层增强、表面微晶化增强技术等方法,通过对上述方法的研究和对比分析,每种方法都有各自相应的特点和应用范围,这些方法拓宽了玻璃表面化学增强技术的研究和发展。 相似文献
17.
Zhenkun Ke Xin Cao Chuanli Shan Lifen Shi Pingping Wang Yong Yang Fengyang Zhao Jiedong Cui Jinwei Li Gang Zhou Min Guan Tao Yu 《Ceramics International》2021,47(14):19605-19613
The purpose of the current work was to research the effect of alkali metal oxide on the structure, thermal properties, viscosity and chemical stability in the glass system (R2O–CaO–B2O3–SiO2) systematically. Because the glass would emulsify when Li2O was added to the glass batch, this article did not discuss Li2O. The results showed that when the amount of Na2O was less than 4 mol.%, there was a higher interconnectivity of borate and silicate sub-networks in glass, as more mixed Si–O–B bonds were present in glass. The glass samples exhibited excellent thermal properties and chemical stabilities. As the amount of Na2O exceeded 4 mol.%, the interconnectivity of borate and silicate sub-networks was weakened. The thermal properties and chemical stabilities of the glass samples were reduced. The connectivity of the silicate sub-network was weakened slightly as the Na/K ratio varied, and the coefficient of thermal expansion (CTE) of the glass samples gradually increased, and the resistance to thermal shock (RTS) value gradually decreased. Moreover, the viscosity of the glass samples decreased with the ratio of Na/Si and Na/K increased. 相似文献
18.
随着手机、平板电脑等电子产业的迅速发展,超薄玻璃的需求量越来越大,对超薄玻璃的力学性能的要求也越来越高。化学钢化是一种能够提高玻璃表面机械强度的方法,化学钢化专利技术成为玻璃制造企业的研究热点。分析了国内外创新主体在中国申请的相关专利技术,探讨了在我国化学钢化专利技术的发展情况以及改善化学钢化效果的相关工艺因素。 相似文献
19.
DAPHNE L. ROTHERMEL 《Journal of the American Ceramic Society》1967,50(11):574-577
The leachability of ion-exchanged alkali alumino-silicate glasses in water and in acid was shown to be a function of the stress at the surface. Alkali aluminosilicate glasses formed by ion exchange under conditions resulting in surface compression were more durable than similar unstressed alkali aluminosilicate glasses melted from batch. Conditions which produced incomplete exchange at the surface, resulting in lower compressive surface stresses, led to a less durable glass surface. Where potassium from a salt bath was being exchanged for sodium in the glass, leachability was inversely proportional to the percent surface exchange. 相似文献