湖南大学学报（自然科学版）2018，Vol.45Issue(6)：85-89,5.DOI:10.16339／j.cnki.hdxbzkb.2018.06.013
粉体粒度对 K2O-Al2O-3SiO2系微晶玻璃析晶动力学的影响*
Effect of Particle Size on Crystallization Kinetics of K2O-Al2O3-SiO2 Glass-ceramics
摘要
Abstract
K2O-Al2O3-SiO2 glass-ceramics were prepared by sintering method.The effects of glass powders with different particle size distribution on the crystallization and microstructure of K2O-Al2O3-SiO2 glass-ceramics were studied,so as to optimize the particle size of K2O-Al2O3-SiO2 glass-ceramics.The results show that the crystallization temperature of glass-ceramics decreases from 913.9℃ to 869.9℃ when the median particle size of glass powder decreases from 38.09 μm to 1.80 μm.Crystallization activa-tion energy also decreased from 320.5 kJ/mol to 234.7 kJ/mol.The crystallized phase of the glass-ceram-ics are both leucite.When the median particle size of the glass powder is 6.30 μm,the microstructure of the glass-ceramics is more uniform.The glass-ceramics has a density of 2.45 g·cm-3,a flexural strength of 74.93 MPa,and a thermal expansion coefficient of 14.32×10-6K-1.关键词
烧结法/微晶玻璃/析晶动力学/粒度/白榴石Key words
sintering method/glass-ceramics/crystallization kinetics/particle size/leucite分类
化学化工引用本文复制引用
肖汉宁,李格..粉体粒度对 K2O-Al2O-3SiO2系微晶玻璃析晶动力学的影响*[J].湖南大学学报（自然科学版）,2018,45(6):85-89,5.基金项目
国家自然科学基金资助项目(51302076),National Natural Science Foundation of China(51302076) （51302076）
