Abstract
A chalcogenide glass-ceramic (0.3 PbSe-0.7 Ge1.5 As0.5 Se3) which transmits in the infra-red region between 8 and 12 μm was produced from a phase separated parent glass. The glass transition temperature (T g) was increased from 280 to ∼ 340°C by crystallizing the phase with the lowerT g. Further heat-treatment produced a glass-ceramic that was up to 60% crystalline and contained PbSe, PbSe2 and GeSe2 crystals with a gran size of ∼ 0.5 μm. The infra-red transmission of the glass-ceramic decreased with increased crystallinity. The glass-ceramic modulus of rupture (38 MN m−2) was increased to as much as twice that of the glass and the Vickers hardness increased by 30% to ∼ 280 kg mm−2.
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Mecholsky Jun, J.J., Moynihan, C.T., Macedo, P.B. et al. Microstructure and properties of an infra-red transmitting chalcogenide glass-ceramic. J Mater Sci 11, 1952–1960 (1976). https://doi.org/10.1007/BF00708273
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DOI: https://doi.org/10.1007/BF00708273