Effects of Li2O replacing Na2O on glass forming, structure and properties of Na2O-MgO-Al2O3-SiO2 glass and glass-ceramics

被引：32

作者：

He, Yao ^{[1
]}

Shen, Xuefeng ^{[1
]}

Jiang, Yong ^{[1
]}

Lu, Anxian ^{[1
]}

机构：

[1] Cent South Univ, Sch Mat Sci & Engn, Changsha 410083, Peoples R China

来源：

MATERIALS CHEMISTRY AND PHYSICS | 2021年 / 258卷

关键词：

MgO-Al2O3-SiO2; glass-ceramics; Crystallization; Structure; Solid electrolyte; IONIC-CONDUCTIVITY; SODIUM-ION; CRYSTALLIZATION KINETICS; CRYSTAL-STRUCTURE; BATTERIES; CONDUCTORS; CHALLENGES; DEPENDENCE; STABILITY; ZNO;

D O I：

10.1016/j.matchemphys.2020.123865

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Glasses and glass-ceramics in the xLi(2)O-(5-x)Na2O-20MgO-20Al(2)O(3)-54SiO(2) system have been prepared by using a conventional melt quenching technology and subsequently a two-step heat-treating method. The effects of Li2O replacing Na2O on crystallization, structural and electrochemical properties of Na2O-MgO-Al2O3-SiO2 glasses and glass-ceramics are studied. The results reveal that the glass forming ability, the bending strength, microhardness and ionic conductivity of parent glasses firstly decrease and then increase as Li2O gradually replacing Na2O from 0 mol.% to 5 mol.% due to the disconnection of Si-O-Si network, the suppression of the mobile species and the electrodynamic interaction between the Na-O- and Li-O- oscillating electric dipoles. The main crystalline phase of glass-ceramics is cordierite and the ionic conductivity is three orders of magnitude higher than that glasses. The ionic conductivity of MgO-Al2O3-SiO2 glass-ceramics with 5.0 mol.% Li2O replacing Na2O reaches the highest ionic conductivity (3.4 x 10(-6) S/cm), which provides a potential application for glass-ceramics as solid electrolytes in the future.

引用

页数：10

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