硅酸盐通报2026，Vol.45Issue(3)：845-852,883,9.DOI:10.16552/j.cnki.issn1001-1625.2025.1134
Al2O3/SiO2对Li2O-Al2O3-SiO2-MgO 微晶玻璃析晶行为及力学性能的影响
Effect of Al2O3/SiO2 on Crystallization Behaviour and Mechanical Properties of Li2O-Al2O3-SiO2-MgO Glass-Ceramics
摘要
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 LixAlxSi1-xO2 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 LixAlxSi3-xO6,MgAl2Si4O12,and SiO2 to LixAlxSi1-xO2,MgAl2Si4O12,LiAlSi3O8,and SiO2,and ultimately to LiAlSi2O6,and LixAlxSi1-xO2.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.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Key words
aluminosilicate glass/Al2O3/SiO2/glass network structure/mechanical property/microstructure/crystallization process分类
化学化工引用本文复制引用
贾旭赫,赵仁龙,张继红,谢俊..Al2O3/SiO2对Li2O-Al2O3-SiO2-MgO 微晶玻璃析晶行为及力学性能的影响[J].硅酸盐通报,2026,45(3):845-852,883,9.基金项目
国家重点研发计划(2024-1129-954-112) （2024-1129-954-112）
广西科技重大专项(2024AA29026) （2024AA29026）
