新型GeS2-Ga2S3-KBr系统玻璃的形成及性能

本文研究了GeS2－Ga₂S₃－KBr系统玻璃的形成范围．根据玻璃的红外光谱、可见光谱、特征温度、热膨胀、电导、析晶和耐水性测试结果，该系统玻璃具有较宽的透过波段（0．45～11．5μm），透过率大于60％；较高的转变温度、热膨胀软化温度（355℃）和析晶温度（593℃）；23℃时玻璃的电导率为10^-9～10^-12S／cm，270℃时电导率为10^-4～10^-6s／cm；玻璃耐水性较好．

Formation and Properties of Novel GeS2-Ga2S3-KBr System Glass

The glass-forming region of GeS₂-Ga₂S₃-KBr system glass was determined. The homogeneous glass containing KBr and Ga₂S₃ up to 25mol% was prepared. The minimum content of GeS₂ for glass formation is 50mol%. Glass dehydration temperature T_w, thermal expansion coefficient, ionic conductivity, optical transmission spectra and chemical durability of GeS₂-Ga₂S₃-KBr system glass were investigated. The experimental results show that the highest characteristic temperatures of the glass are T_w>284.7℃, T_d=355℃, T_c=593℃ and ΔT=T_c-T_w>200℃. The optical transmission of the glass is between 0.45 and 11.5μm. The transparent region of the glass shifts towards ultraviolet region by adding KBr. The absorption bands at 3600, 2500 and 1600cm^-1 in infrared spectra can be assigned to the stretching vibration of O--H groups, the stretching vibration of S-H groups and the bending vibration of H--O--H groups. The ionic conductivities of the glass are 10^-9～10^-12S/cm at 23℃, 10^-4～10^-6S/cm at 270℃. The chemical durability of GeS₂-Ga₂S₃-KBr system glass is satisfactory. The glass of GeS₂-Ga₂S₃-KBr system could be used as a potential candidate optical material transmitting from visible to mid-infrared regions.