The Ga20Ge20Se60 glass-ceramics as a promising long-wave IR optical material
Source abstract
Abstract
The Ga 20Ge 20Se 60 chalcogenide glass-ceramics with a crystalline phase volume fraction of 50–55%, an average crystal size of 2–5 μm, and a transparency of 50–65% in the spectral range of 7–16 μm (at 2 mm sample thickness) are prepared. The features of phase formation during glass-forming melt quenching and subsequent annealing are studied. In samples quenched in water from 750 to 850 °C, Ga 40-xGe xSe 60 ( x = 20–30) solid solutions with a cubic unit cell are formed. Upon quenching from 700 °C, solid solutions isostructural to monoclinic Ga 2Se 3 are formed. Annealing of glass-ceramics at 480 °C leads to the decomposition of the cubic phase and the appearance of mixed GaGeSe 3. Fracture toughness, elastic modulus, and abrasive resistance increase with increasing gallium content in Ga xGe 40-xSe 60 ( x = 5–20) samples. The reasons for the high transparency of Ga 20Se 20Se 60 glass-ceramics in the long-wave infrared range and its dependence on the production conditions are established and discussed.
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Research context
OpenAlex topics: Phase-change materials and chalcogenides · Glass properties and applications · Solid-state spectroscopy and crystallography
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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