GeSe_2-As_2Se_3-CdSe系红外玻璃形成的研究

FORMATION OF GeSe_2-As_2Se_3-CdSe INFRARED GLASSES

为研究GeSe2-As2Se3-CdSe系统的玻璃形成区,制备了该系统系列的透红外玻璃样品,并用差示扫描量热法对玻璃样品进行了测试。以玻璃析晶峰的形状以及玻璃析晶温度Tx与玻璃转变Tg的差△T为参数,确定了具有较好析晶稳定性的组成区。结果表明:富GeSe2组成区能允许添加更多的CdSe。GeSe2摩尔分数在20%以上时,该三元系统有较大的玻璃形成区,并可对该区域内组成的玻璃进行微晶化处理。红外透射光谱的测试结果表明:所研究的玻璃样品在波长8-12μm区域均具有较好的透过性。

A series of glass samples from GeSe2-As2Se3-CdSe system were prepared to investigate the glass-forming region. Differential scanning calorimetry measurements were taken of the glass samples. Analysis and comparison of the form of crystallization peak and the temperature difference （AT） between crystallization temperature Tx and glass transition temperature Tg were made to determine the thermally stable glass composition zone in the glass-forming region. The results show that glass matrix with a higher GeSe2 content can accommodate more CdSe. A larger glass-forming region is obtained when the content of GeSe2 is higher than 20 % （in mole）. The glass components in this region are expected to be suitable for further crystallization treatment. Infrared transmission spectra indicate that these glass samples are suitable for optical transmission in the infrared range of 8-12 μm.