混合碱效应对磷酸盐包边玻璃性质的影响

高功率大尺寸激光玻璃硬包边技术对于提高激光玻璃的饱和增益系数具有非常重要的价值。本文采用传统的玻璃熔制方法，研究了Li-Na混合碱效应对磷酸盐包边玻璃折射率、热膨胀系数α、玻璃转变温度Tg、膨胀软化温度Td以及溶解速率（DR）的影响规律。研究结果表明：当Li/(Li+Na)=0.5时，Tg、Td和DR取得极小值，表明混合碱效应既能降低包边玻璃的转变温度，又能提高包边玻璃的化学稳定性，这些性质对于包边玻璃的设计是非常可贵的。

Edge-cladding is a key factor in improving saturated small signal gain coefficient 'beta's of large laser disc glass. In this paper, the glasses were melted with traditional method. The influences of mixed alkali effect (MAE) on refractive index, thermal expansion coefficient 'alpha', glass transition temperature Tg, dilatometer softening temperature Td, and relative chemical durability of phosphate edge-cladding glasses were studied. The results reveal that when Li/(Na+Li)=0.5, Tg, Td, and dissolution rate (DR) reach a minimal value. These results are preferred in phosphate edge-cladding glasses.