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．
The glass-forming region of GeS2-Ga2
S3-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
Tw, 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 Tw>284.7℃, Td=355℃, Tc=593℃ and ΔT=Tc-Tw>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.
参考文献
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