Li2O-Al2O3-SiO2高强度半透光微晶玻璃晶化及机械性能研究

硅酸盐通报 ›› 2022, Vol. 41 ›› Issue (11): 3813-3818.

所属专题：玻璃

Li₂O-Al₂O₃-SiO₂高强度半透光微晶玻璃晶化及机械性能研究

周卫卫¹, 陈宝¹, 郝振邦², 何光园², 朱凯迪¹, 刘景仲¹, 张福军¹, 张继红²

1.常熟佳合显示科技有限公司,常熟 215500;
2.武汉理工大学硅酸盐建筑材料国家重点实验室,武汉 430070

收稿日期:2022-05-06 修订日期:2022-07-25 出版日期:2022-11-15 发布日期:2022-12-12
通信作者: 张福军,工程师。E-mail:zfj@jsrfsolar.cn;张继红,博士,副研究员。E-mail:optinfo@whut.edu.cn
作者简介:周卫卫(1988—),男。主要从事高强度微晶玻璃研究。E-mail:zww@jsrfsolar.cn

Crystallization and Mechanical Properties of Li₂O-Al₂O₃-SiO₂ Glass Ceramics with High Strength and Semi-Transparency

ZHOU Weiwei¹, CHEN Bao¹, HAO Zhenbang², HE Guangyuan², ZHU Kaidi¹, LIU Jingzhong¹, ZHANG Fujun¹, ZHANG Jihong²

1. Changshu Jiahe Display Technology Co., Ltd., Changshu 215500, China;
2. State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan 430070, China

Received:2022-05-06 Revised:2022-07-25 Online:2022-11-15 Published:2022-12-12

摘要/Abstract

摘要： 设计玻璃组成及晶化工艺提高Li₂O-Al₂O₃-SiO₂微晶玻璃的强度是当前亟需解决的问题。本文通过熔融浇铸法制备了具有特定组成的Li₂O-Al₂O₃-SiO₂玻璃,通过两步热处理方法制备了高强度半透光微晶玻璃。差示扫描热分析结果显示玻璃的转变温度为532 ℃,且有多个析晶峰。热处理后,X射线衍射证明了玻璃中析出以Li₂Si₂O₅、LiAlSi₃O₈、LiAlSi₄O₁₀为主晶相的晶体,且随着热处理温度的上升或时间延长,透锂长石逐渐转变为锂辉石晶相,晶粒尺寸也从70 nm(热处理条件为:750 ℃,0.5 h和780 ℃,10 h)生长至340 nm(热处理条件为:820 ℃,0.5 h和850 ℃,4 h),微晶玻璃从半透光转变为完全乳浊。微晶玻璃具有优异的机械性能,维氏硬度最大可达9.15 GPa,环上环的最大负载可达1 335 N,最大整机跌落高度可达162 cm。此微晶玻璃可用于手机等电子器件的背板保护玻璃。

关键词: 微晶玻璃, 维氏硬度, 热分析, 机械性能, 热处理, 熔融浇铸法

Abstract: It's an urgent problem to improve the strength of Li₂O-Al₂O₃-SiO₂ glass ceramics by glass composition design and crystallization process control. In this paper, Li₂O-Al₂O₃-SiO₂ glass with specific composition was prepared by melt-quenching method, and high strength semi-translucent glass ceramics were prepared by two-step heat treatment. Differential scanning thermal analysis shows that the glass transition temperature is 532 ℃ and there are multiple crystallization peaks. After heat treatment, X-ray diffraction patterns prove that Li₂Si₂O₅, LiAlSi₃O₈, LiAlSi₄O₁₀ as the main crystal phases are precipitated in the glass, petalite crystals gradually changes into spodumene crystal phases with the increase of heat treatment temperatures or durations, and average crystal sizes grow from 70 nm (heat treatment parameters: 750 ℃,0.5 h and 780 ℃, 10 h) to 340 nm (heat treatment parameters: 820 ℃, 0.5 h and 850 ℃, 4 h). The glass ceramics change from translucent to opacities. Glass ceramics have excellent mechanical properties, the maximum Vickers hardness is 9.15 GPa, the maximum ring-on-ring load can reach 1 335 N, and the maximum simulated whole machine drop height can reach 162 cm. The glass ceramics can be used as backplane protection glass for mobile phone devices.

Key words: glass ceramics, Vickers hardness, thermal analysis, mechanical property, heat treatment, melt-quenching mehtod

中图分类号:

TQ171

周卫卫, 陈宝, 郝振邦, 何光园, 朱凯迪, 刘景仲, 张福军, 张继红. Li₂O-Al₂O₃-SiO₂高强度半透光微晶玻璃晶化及机械性能研究[J]. 硅酸盐通报, 2022, 41(11): 3813-3818.

ZHOU Weiwei, CHEN Bao, HAO Zhenbang, HE Guangyuan, ZHU Kaidi, LIU Jingzhong, ZHANG Fujun, ZHANG Jihong. Crystallization and Mechanical Properties of Li₂O-Al₂O₃-SiO₂ Glass Ceramics with High Strength and Semi-Transparency[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2022, 41(11): 3813-3818.

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Li₂O-Al₂O₃-SiO₂高强度半透光微晶玻璃晶化及机械性能研究

Crystallization and Mechanical Properties of Li₂O-Al₂O₃-SiO₂ Glass Ceramics with High Strength and Semi-Transparency

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