摘 要

近年来随着高新技术的发展，电子显示行业也发生了巨大的改变，从传统的CRT型（Cathode Ray Tube，阴极射线管）到如今的FPD型（Flat Panel Display，平板显示器）。显示设备也由最初的电视到现在的平板电脑、手机、车载显示等等，可以说，显示技术的进步改变了我们的生活方式。而其中作为显示设备原材料中重要的一环，超薄玻璃成为制约显示技术发展的关键材料之一。当前显示技术正朝着柔性显示的方向前进，但普通超薄玻璃显然满足不了要求。因此，研制新型显示用超薄玻璃成为了研究的热点。

柔性显示玻璃是一种特种超薄玻璃，它的厚度仅有0.1mm，且具有柔性，可以初步满足显示用基板玻璃的要求，如：合适的热膨胀系数（2810^-7/℃~4210^-7/℃）、良好的热稳定性（应变点温度大于650℃）、高强度和低密度等。但目前为止，柔性显示玻璃的生产技术和市场都掌握在美国康宁（Corning）、日本旭硝子（Asahi）及德国肖特（Schott）等几家公司手中。我国的柔性显示玻璃起步较晚，大部分都还处于实验室阶段。因此，开发出拥有自主知识产权的柔性显示玻璃具有重要意义。

本论文以柔性显示玻璃为研究对象，在TFT-LCD基板玻璃的基础上进行组分设计与优化，采用传统的熔融退火工艺，成功制备柔性显示玻璃。并利用热膨胀仪、高温粘度及、差示扫描量热仪、X射线衍射仪等仪器测试了玻璃的热膨胀系数、粘度、析晶温度及析晶晶相等工艺性能。从粘度数据中拟合出了玻璃的特征温度-粘度曲线，得到了关于玻璃应变点温度、转变点温度等特征粘度参考点温度。

本论文通过添加La₂O₃来改善柔性显示玻璃的性能，研究La₂O₃对柔性显示玻璃工艺性能的影响，探索出添加的最佳含量。在此基础上，再调整碱土金属氧化物的含量，从中优化组成，得到满足显示用基板玻璃的热膨胀系数。

研究结果表明：La₂O₃可以明显改善玻璃的热膨胀性能、特征粘度参考点温度及析晶温度，且La₂O₃的最优含量应为2%；从析晶晶相来看，未添加La₂O₃的峰形较高，表明此时晶相生长情况好于添加了La₂O₃的玻璃晶相；在调整MgO/CaO比后，玻璃热膨胀系数随着MgO/CaO比的增大而出现减小的趋势。

本文的特色：通过研究La₂O₃对柔性显示玻璃的热膨胀系数、粘度、析晶温度及析晶晶相等性能的影响，为研发适用于柔性显示玻璃的化学组成提供依据；此外通过调整碱土金属氧化物的含量，以追求更低的热膨胀系数。

关键词：柔性显示玻璃；工艺性能；热膨胀系数；粘度

Abstract

In recent years, with the development of high-technology, electronic display industry has also tremendous changes, from the traditional CRT (Cathode Ray Tube) to today's FPD (Flat Panel Display). Display equipment from the original TV to the current Tablet PC, mobile phones, car display, etc. It can be said that the progress of display technology has changed our way of life. Which as an important part of the display device raw materials, ultra-thin glass control technology to become one of the key materials. The current display technology is moving in the direction of the flexible display, but the ordinary ultra-thin glass is completely not satisfy the requirements. Therefore, the development of new display with ultra-thin glass has become a hot research.

Flexible display glass is a special ultra-thin glass, its thickness is only 0.1mm, and has a flexibility. It can initially satisfy the requirements of the display substrate glass, such as: the appropriate coefficient thermal expansion (28×10^-7/℃~4210^-7/℃), good thermal stability (the strain point temperature exceed 650℃), high strength and low density. But so far, flexible display glass production technology and the market are in the United States Corning Incorporated, Japan Asahi Glass and Germany Schott and several other companies in the hands. China's flexible display glass started late, most of them still in the laboratory stage. Therefore, the development of flexible display glass with independent intellectual property rights is of great significance.

In this paper, flexible display glass were taking as the research of object, in the TFT-LCD substrate glass on the basis of component design and optimization, and made by traditional melting-annealing method, finally the flexible display glass was successfully achieved. The CTE, viscosity, crystallization temperature and crystallization of the glass were tested by means of thermal expansion meter, high temperature viscosity, differential scanning calorimeter, X – ray diffractometer and so on. The characteristic temperature - viscosity curve of the glass was fitted from the viscosity data, and the reference point temperature of the intrinsic viscosity of the glass strain point temperature, transition point temperature and so on was obtained.

In this paper, La₂O₃ was used to improve the properties of flexible glass. The effect of La₂O₃ on the performance of flexible glass was studied, and the optimum content was obtained. On this basis, the content of the alkaline earth metal oxide is adjusted to optimize the composition, and the coefficient of thermal expansion satisfying the substrate glass for display is obtained.

The results show that La₂O₃ can significantly improve the thermal expansion of glass, the reference point temperature and crystallization temperature, and the optimum content of La₂O₃ should be 2%. From the crystalline crystal phase, the peak of La₂O₃ is not higher, The results show that the growth phase of the glass is better than that of La₂O_3. .After the MgO / CaO ratio is adjusted,the thermal expansion coefficient of the glass decreases with the increase of MgO / CaO ratio.

The influence of La₂O₃ on the thermal expansion coefficient, viscosity, crystallization temperature and crystal-crystalline properties of flexible glass is studied. It provides a basis for the development of chemical composition suitable for flexible glass. In addition, by adjusting the alkaline earth metal oxide Content to pursue a lower coefficient of thermal expansion.

Key words: flexible display glass；process performance；coefficient thermal expansion；viscosity

目 录

第1章 绪论 1

1.1 柔性玻璃文献综述 1

1.1.1 柔性玻璃背景介绍 1

1.1.2 柔性玻璃的应用领域 2

1.1.3 柔性显示玻璃的性能要求 2

1.2 国内外研究现状及进展 4

1.2.1 柔性玻璃的基础理论研究 4

1.2.2 柔性玻璃的研究现状 4

1.3 本课题的研究内容 5

1.3.1 研究目标及意义 5

1.3.2 研究内容与思路 5

第2章 实验过程与性能测试 6

2.1 实验过程 6

2.1.1 原料 6

2.1.2 实验仪器与设备 6

2.1.3 玻璃样品的熔制温度 7

2.1.4 技术路线 8

2.2 玻璃样品的理化性能测试 8

2.2.1 玻璃热膨胀系数的测试 9

2.2.2 低温特征粘度点的测试 10

2.2.3 高温粘度的测试 11