新型GeSe_2-Ga_2Se_3-KI系统硫卤玻璃形成的研究(英文)

FORMATION OF NEW CHALCOHALIDE GLASSES IN GeSe_2-Ga_2Se_3-KI SYSTEM

开发了有高含量碱金属离子的新型硫化物玻璃。合成了GeSe2-Ga2Se3-KI系统的玻璃样品。研究了该系统的玻璃形成区并用孤对电子理论进行了解释。讨论了Ga2Se3和KI对玻璃形成能力的影响。给出了该系统玻璃的密度、特性温度、Raman和可见-红外光谱等。实验结果表明:该系统具有较广的玻璃形成区,某些组成,如摩尔组成为50 GeSe2 25Ga2Se3 25KI的样品具有良好的热学和光学性质,其表征热稳定性的特征温度差大于120K,玻璃透光范围从590nm到14.2μm。

A new chalcohalide glass system containing higher content of alkali metal ions was developed. Glass samples in the GeSe2-Ga2Se3-KI system were synthesized. The glass-forming region of this system was searched and explained from the theory of lone-pair electrons. The effects of Ga2Se3 and KI on the glass forming ability were discussed. Some properties such as density, characteristic temperature, Raman and infrared-visible spectra were presented. The results show that this system has a fairly large glass-forming region, some samples, for example as in molar composition of 50 GeSe2 25Ga2Se3 25KI, have good thermal stability and optical properties, the glass characteristic temperature difference, which expresses the glass thermal stability, is more than 120 K and the transmittance range from 0.59 to 14.2 μm.