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硅酸盐通报 ›› 2026, Vol. 45 ›› Issue (3): 845-852.DOI: 10.16552/j.cnki.issn1001-1625.2025.1134

• 玻璃本构与模拟计算 • 上一篇    下一篇

Al2O3/SiO2对Li2O-Al2O3-SiO2-MgO微晶玻璃析晶行为及力学性能的影响

贾旭赫1(), 赵仁龙1, 张继红1,2(), 谢俊1,2()   

  1. 1.武汉理工大学先进玻璃材料全国重点实验室,武汉 430070
    2.合浦县硅材料产业技术研究中心,北海 536100
  • 收稿日期:2025-11-17 修订日期:2025-12-29 出版日期:2026-03-20 发布日期:2026-04-10
  • 通信作者: 张继红,博士,研究员。E-mail: optinfo@whut.edu.cn;
    谢 俊,博士,研究员。E-mail: xiejun2006@ whut.edu.cn
  • 作者简介:贾旭赫(2000—),男,硕士研究生。主要从事微晶玻璃材料的研究。E-mail: 1263119632@qq.com
  • 基金资助:
    国家重点研发计划(2024-1129-954-112);广西科技重大专项(2024AA29026)

Effect of Al2O3/SiO2 on Crystallization Behaviour and Mechanical Properties of Li2O-Al2O3-SiO2-MgO Glass-Ceramics

JIA Xuhe1(), ZHAO Renlong1, ZHANG Jihong1,2(), XIE Jun1,2()   

  1. 1.State Key Laboratory of Advanced Glass Materials,Wuhan University of Technology,Wuhan 430070,China
    2.Hepu Research Center for Silicate Materials Industry Technology,Beihai 536100,China
  • Received:2025-11-17 Revised:2025-12-29 Published:2026-03-20 Online:2026-04-10

摘要:

Li2O-Al2O3-SiO2-MgO微晶玻璃因优异的热学性能及力学性能备受关注,其玻璃网络结构、晶相组成及最终力学性能受到Al2O3/SiO2摩尔比的显著影响。本研究采用高温熔融法制备了系列不同Al2O3/SiO2摩尔比组成的玻璃样品,并通过两步法热处理工艺成功获得了系列主晶相为Li x Al x Si1-x O2的微晶玻璃。研究结果表明:随着Al2O3/SiO2摩尔比增加,玻璃网络中Q3、Q4基团向Q1、Q2基团转化,这一表观变化实质是由[AlO4]增加引起的扰动所致;热膨胀系数由5.31×10-6-1逐渐升高至5.98×10-6-1,呈递增趋势;晶体微观结构从球状转变为不规则晶体,最终转变为蜂窝状;晶相从Li x Al x Si3-x O6、MgAl2Si4O12和SiO2转为Li x Al x Si1-x O2、MgAl2Si4O12、LiAlSi3O8和SiO2,最终转为LiAlSi2O6和Li x Al x Si1-x O2。力学性能测试表明,微晶玻璃的最大维氏硬度为8.89 GPa,随后的性能衰减主要归因于晶相转变及晶体微观形貌向蜂窝状的演化。

关键词: 铝硅酸盐玻璃, Al2O3/SiO2, 玻璃网络结构, 力学性能, 微观结构, 结晶过程

Abstract:

Li2O-Al2O3-SiO2-MgO glass-ceramics has attracted much attention due to its excellent thermal and mechanical properties, and its glass network structure, crystal phase composition and final mechanical properties are significantly affected by Al2O3/SiO2 molar ratio. In this study, a series of glass samples with different Al2O3/SiO2 mole ratios compositions were prepared by high-temperature melting method, and a series of glass-ceramics with Li x Al x Si1-x O2 as the main crystalline phase was successfully obtained by a two-step heat treatment process. Research findings indicate that with the increase of Al2O3/SiO2 mole ratio, Q3 and Q4 units within the glass network transform into Q1 and Q2 units, and this apparent change is essentially caused by the disturbance caused by the increase of [AlO4]. The coefficient of thermal expansion gradually rises from 5.31×10-6 -1 to 5.98×10-6-1, with a incremental tendency. The crystal morphology evolves from spherical to irregular, and finally to a honeycomb structure. The crystal phase changes from Li x Al x Si3-x O6, MgAl2Si4O12, and SiO2 to Li x Al x Si1-x O2, MgAl2Si4O12, LiAlSi3O8, and SiO2, and ultimately to LiAlSi2O6, and Li x Al x Si1-x O2. The mechanical property tests show that the maximum Vickers hardness of glass-ceramics is 8.89 GPa, and the subsequent decay of the performance is mainly attributed to the transition of crystal phase and the evolution of the microscopic morphology of the crystal to honeycomb structure.

Key words: aluminosilicate glass, Al2O3/SiO2, glass network structure, mechanical property, microstructure, crystallization process

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