Li2O掺杂对SiO2-Al2O3-MgO系玻璃结构和力学性能的影响

Li₂O掺杂对SiO₂-Al₂O₃-MgO系玻璃结构和力学性能的影响

摘要: 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。

Abstract: SiO₂-Al₂O₃-MgO glasses doped with 0-3.0wt% 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 1.0wt%, the glass had the most stable structure and the best bending and compressive properties.