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

The glass-forming region of GeS2-Ga2S3-KBr system glass was determined. The homogeneousglass containing KBr and GabS3 up to 25mol% was prepared. The minimum content of GeS2 forglass formation is 50mol%. Glass dehydration temperature Tw, thermal expansion coefficient, ionicconductivity, optical transmission spectra and chemical durability of GeS2-Ga2S3-KBr system glasswere investigated. The experimental results show that the highest characteristic temperatures ofthe glass are Tw 284.7℃, Td=355℃, To= 593℃ and AT = To - Tw 200℃. The opticaltransmission of the glass is between 0.45 and 11.5pm. The transparent region of the glass shiftstowards ultraviolet region by adding KBr. The absorption bands at 3600, 2500 and 1600cm(-1) ininfrared spectra can be assigned to the stretching vibration of O-H groups, the stretching vibrationof S-H groups arid the bending vibration of H-O-H groups. The ionic conductivities of the glassare 10(-9) 10(-12)S/cm at 23℃, 10（-4）10-6S/cm at 270℃. The chemical durability of GeS2GaZS3-KBr system glass is satisfactory. The glass of GeS2-GabS3-KBr system could be used as apotential candidate optical material transmitting from visible to mid-infrared regions.