AlF_3基氟磷酸盐玻璃的析晶动力学及其红外透过性能

PROPERTIES AND CRYSTALLIZATON KINETICS OF AlF_3-BASED FLUOPHOSPHATE GLASSES

以 10MgF2 ·2 0CaF2 ·BaF2 ·10SrF2 ·15YF3·35AlF3氟铝酸盐玻璃为基玻璃 ,用Ba(PO3) 2 替代等摩尔含量的BaF2 ,以改善玻璃的抗失透能力。用差热分析方法研究了Ba(PO3) 2 含量对氟铝酸盐玻璃热性能和析晶动力学的影响。结果表明 :Ba(PO3) 2 含量增加使玻璃转变温度Tg和析晶温度Tx 升高 ,熔化温度降低 ,成玻璃能力增加。在玻璃中加入摩尔分数 (下同 )为 2 %的Ba(PO3) 2 即可获得无析晶的 8mm厚玻璃。另外 ,还给出了含 2 %Ba(PO3) 2 玻璃的透过光谱 ,玻璃的红外透过范围可达 4μm ,该玻璃具有较好的成玻璃性能 ,并有较宽的红外透过范围和高的透过率 。

In order to improve the ability of glasses against devitrification, Ba(PO_3)_2 was introduced to fluoroaluminate basic glass, which consisting of 10MgF_2·20CaF_2·BaF_2·10SrF_2·15YF_3·35AlF_3, to substitute BaF_2 in the glass. The influences of Ba(PO_3)_2 contents on the properties and crystallization kinetics of glasses were studied by differential thermal analysis technique. The experiment results indicate that more Ba(PO_3)_2 content will increase the T_g and T_x of glasses, reduce melting temperature of glasses and improve also the ability of glass forming. A 8 mm thick glass plate can be obtained with the glass substituted by 2% (in mole, same below) Ba(PO_3)_2. In addition, the transmitting spectrum of glass containing 2% Ba(PO_3)_2 was measured, the infrared transmitting region reaches to 4 μm. This glass is stable, and has a wide infrared transparent region, therefore it is a potential optical glass material.