MgO含量对微晶玻璃结构及性能的影响  

Effect of MgO Content on Structure and Properties of Glass-Ceramics

作　　者：彭瑞欣 韩韩 林鸿剑 李筱凡 姜宏[1,2,3,4] PENG Ruixin;HAN Han;LIN Hongjian;LI Xiaofan;JIANG Hong(Special Glass Key Lab of Hainan Province,Hainan University,Haikou 570228;State Key Laboratory of Marine Resource Utilization in South China Sea,Hainan University,Haikou 570228;HNHT Special Glass Technology Co.,Ltd.,Chengmai,571924,China;State Key Laboratory of Special Glass,Chengmai 571924,China)

机构地区：[1]海南大学,海南省特种玻璃重点实验室,海口570228 [2]海南大学,南海海洋资源利用国家重点实验室,海口570228 [3]海南海控特玻科技有限公司,澄迈571924 [4]特种玻璃国家重点实验室,澄迈571924

出　　处：《硅酸盐通报》2021年第10期3497-3503,共7页Bulletin of the Chinese Ceramic Society

基　　金：海南省重点研发计划(ZDYF2020015);国家自然科学基金(51761010);海南大学科研平台建设(ZY2019HN09)。

摘　　要：锂铝硅系微晶玻璃是一种具有优异的光学、力学性能的微晶玻璃材料。本文制备了以透锂长石和二硅酸锂为主晶相的锂铝硅系透明微晶玻璃,并通过DSC、XRD与SEM研究了MgO含量对该微晶玻璃析晶行为及结构的影响,利用维氏硬度、抗弯强度等测试方法研究了MgO含量对该微晶玻璃力学性能的影响。结果表明,当MgO含量(质量分数)从0%增加至3%,基础玻璃的析晶温度从771℃降低至729℃,析晶能力增强,微晶玻璃的结晶度从62%增加至72%,晶粒尺寸从29 nm增大至33 nm。随着MgO含量的增加,微晶玻璃中会析出β-石英固溶体,抗弯强度增大。Li_(2)O-Al_(2)O_(3)-SiO2 glass-ceramics have excellent optical and mechanical properties. In this paper, the Li_(2)O-Al_(2)O_(3)-SiO2 transparent glass-ceramics with diorthite and lithium disilicate as the main crystal phase were prepared. The influence of MgO content on the crystallization behavior and structure of glass-ceramics was studied by DSC, XRD and SEM, and the influence of MgO content on the mechanical properties of glass-ceramics was studied by Vickers hardness, bending strength and other test methods. The results show that when the MgO content(mass fraction) increases from 0% to 3%, the crystallization temperature of the basic glass decreases from 771 ℃ to 729 ℃, and the crystallization ability is enhanced, basides, the crystallinity increases from 62% to 72%, and the grain size increases from 29 nm to 33 nm. With the increase of MgO content, β-quartz solid solution precipitates out of the glass-ceramics and the bending strength increases.

关 键 词：锂铝硅系微晶玻璃 氧化镁 析晶性能 透锂长石 二硅酸锂 β-石英固溶体 

分 类 号：TQ171[化学工程—玻璃工业]