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.
作者
陈丽娜
谢俊
WANG Mingzhong
CAO Shiyi
CUI Xiuzhen
LIANG Xinhui
ZHANG Jihong
HAN Jianjun
HU Kaiwen
CHEN Lina;XIE Jun;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)
基金
by the Key Research Project of Hainan Province(No.ZDYF2021GXJS027)
the Shenzhen Free Investigation Fundamental Research Project(2021Szvup107)。