Abstract
ABSTRACT The formation and properties of glasses based on a stoichiometric pseudo-three-component system, Ga2 S3-Bi2 S3-SnS, were investigated for the application as an infrared transmitting material. Glasses were obtained in the compositional range from 30 to 40 mol% of GaS3/2, 30 to 50 mol% of BiS3/2, and 10 to 30 mol% of SnS. Glasses were also obtained for a system in which some parts of the Bi2 S3 were replaced by the same molar amount of Sb2 S3. The glass transition temperatures of the obtained glasses were within a range of 260 to 305°C. Thermally stable glasses were obtained although the glass system contained neither selenium nor arsenic and less amount of antimony, which are commonly used for typical chalcogenide glasses. The difference between crystallization and glass transition temperatures was close to 90 K for the glass with a composition of 40GaS3/2 · 40BiS3/2 · 20SnS, and it was extended beyond 100 K by replacing a part of the bismuth with antimony. The transmission spectra of the glasses showed that they have a wide optical window covering a wavelength region from 1.4 μm to 13 μm.
Highlights
With increased attention on security and safety in society, the demand for infrared surveillance systems is growing rapidly
It is very important to build up infrared systems composed of optics, utilizing materials that are transparent in the infrared region covering the latter range of the atmospheric windows
The gallium sulfide-containing glass systems reported to date are classified into two groups [21]; one is a group represented by the Ga-Ge-S glass system [22,24] and the other is a group represented by the GaLa-S glass system [18,19]
Summary
With increased attention on security and safety in society, the demand for infrared surveillance systems is growing rapidly. These infrared systems generally use infrared radiations in wavelengths ranging from 3 to 5 μm and 8 to 13 μm; these wavelength ranges are known as atmospheric windows [1,2,3,4]. It is very important to build up infrared systems composed of optics, utilizing materials that are transparent in the infrared region covering the latter range of the atmospheric windows. Crystal materials, i.e. germanium and zinc selenide, have been conventionally utilized to fabricate these optics. The lower formability of the crystals causes the poor cost performance of these materials
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
