Li2O掺杂对SiO2-Al2O3-MgO系玻璃结构和力学性能的影响

Effect of Li2O Doping on Structure and Mechanical Properties of SiO2-Al2O3-MgO Glass

采用传统熔体冷却法制备了Li2O掺杂量(质量分数)为0~3.0%的SiO2-Al2O3-MgO玻璃,探讨了Li2O掺杂量对玻璃热稳定性、结构稳定性以及力学性能的影响。结果表明:掺杂Li2O能有效降低玻璃的软化温度;随着Li2O掺杂量的增加,玻璃的光学带隙先减小后增大,结构稳定性、热稳定性、力学性能先增强后减弱,当Li2O掺杂量为1.0%时,玻璃的结构最稳定、弯曲和压缩性能最优。

SiO2-Al2O3-MgO glasses doped with 0-3.0 wt%Li2O were prepared by conventional melt quenching technique,and the effects of Li2O doping amount on thermal property,structural stability and mechanical properties of the glass were investigated.The results show that the doping of Li2O reduced the softening temperature of the glass effectively.With the increase of Li2O doping amount,the optical band gap of the glass decreased first and then increased,while the structural stability,thermal stability and mechanical properties increased first and then decreased.When the Li2O doping amount was 1.0 wt%,the glass had the most stable structure and the best bending and compressive properties.