Na_(2)O/Li_(2)O Ratio Dependency on the Thermal,Mechanical,Dielectric Properties and Chemical Stabilities of Li_(2)O-Al_(2)O_(3)-SiO_(2) Glass  

作　　者：CHEN Lina XIE Jun WANG Mingzhong CAO Shiyi CUI Xiuzhen LIANG Xinhui ZHANG Jihong HAN Jianjun HU Kaiwen 陈丽娜;谢俊;WANG Mingzhong;CAO Shiyi;CUI Xiuzhen;LIANG Xinhui;ZHANG Jihong;HAN Jianjun;HU Kaiwen(State Key Laboratory of Silicate Materials for Architectures,Wuhan University of Technology,Wuhan 430070,China;Shenzhen Research Institute of Wuhan University of Technology,Shenzhen 518000,China;Xianning Nanbo Photoelectric Glass Co.Ltd.,Xianning 437100,China;International School of Materials Science and Engineering,Wuhan University of Technology,Wuhan 430070,China)

机构地区：[1]State Key Laboratory of Silicate Materials for Architectures,Wuhan University of Technology,Wuhan 430070,China [2]Shenzhen Research Institute of Wuhan University of Technology,Shenzhen 518000,China [3]Xianning Nanbo Photoelectric Glass Co.Ltd.,Xianning 437100,China [4]International School of Materials Science and Engineering,Wuhan University of Technology,Wuhan 430070,China

出　　处：《Journal of Wuhan University of Technology(Materials Science)》2022年第6期1129-1136,共8页武汉理工大学学报（材料科学英文版）

基　　金：by the Key Research Project of Hainan Province(No.ZDYF2021GXJS027);the Shenzhen Free Investigation Fundamental Research Project(2021Szvup107)。

摘　　要：Li_(2)O-Al_(2)O_(3)-SiO_(2) based glasses were investigated as potential protection glass for electronic devices due to their excellent mechanical properties,such as high hardness,toughness,and scratch resistance.In this paper,Li_(2)O-Na_(2)O-Al_(2)O_(3)-SiO_(2) glass with different Li_(2)O/Na_(2)O ratio components were prepared by meltquenching method,and the effects of Na_(2)O/Li_(2)O ratio on the glass densities,structure,thermal,mechanical properties,and chemical stabilities were studied.The experimental results indicate that the glass transition temperature increases with the increases in Na_(2)O/Li_(2)O ratios,due to larger ion radius.While the thermal expansion coefficient slightly decreases from 11.4×10^(-6) to 11.09×10^(-6)/℃.The elastic modulus increases from 57 to 72 GPa.The bending strength reaches maximum 80.90 MPa when the Na_(2)O/Li_(2)O ratio is 1.7,then decreases as the ratio further increases.In addition,the Vicker’s hardness gets to 7.37 GPa with largest Na_(2)O/Li_(2)O ratio.Moreover,the dielectric loss and dielectric constant increases as the ratio increases.The Raman structure analysis shows the Q4[Si-O-Si]decreases as Na_(2)O/Li_(2)O ratio increases,which is responsible for the characteristic properties change.Moreover,the glass shows lowest mass loss in 10vol%HF solutions when the ratio is 1.4,while 1.7 in 5wt%NaOH solution.

关 键 词：glass composition dielectric constant coefficient of thermal expansion elastic modulus 

分 类 号：TQ171.1[化学工程—玻璃工业] TN03[化学工程—硅酸盐工业]