Aging in chalcohalide glasses: Origin and consequences

Effect of Physical Aging Conditions on the Mechanical Properties of Te2As3Se5 (TAS) Glass Fibers

“…[1][2][3][4] However, a remaining crucial problem is still accompanying chalcogenide fibers: structural relaxation can occur even for temperatures far below the glass transition temperature (T g ), also for bulk chalcohalide glasses and oxide glasses. 5,6 At room temperature we can observe a significant change in physical properties. 7 Fiberization alters specifically the thermo-mechanical prehistory of a glass and brings the glass to a new thermodynamic state far away from the equilibrium.…”

“…Chalcogenide glassy optical fibers are becoming more and more interesting due to their many kinds of potential applications covering a wide range from biotechnology and environmental monitoring to high nonlinear refractive index and low attenuation in Mid‐Infrared (IR) lightguide . However, a remaining crucial problem is still accompanying chalcogenide fibers: structural relaxation can occur even for temperatures far below the glass transition temperature ( T g ), also for bulk chalcohalide glasses and oxide glasses . At room temperature we can observe a significant change in physical properties .…”

A novel chalcohalide fiber with high nonlinearity and low material zero‐dispersion via extrusion

“…Optical band‐gap, transmission window, refractive index, etc could be scaled down or up by halogen/metal halide doping. ChH glasses have been studied in past several decades for its potential applications in the infrared, such as multispectral imaging from visible to long‐wave infrared, or large‐capacity of rare‐earth doping for fiber laser and amplifier . One of such ChH glasses is GeSe 2 ‐Ga 2 Se 3 ‐CsI, which has good thermal stability and excellent transparency from visible up to 14 μm atmospheric window.…”

Effects of Pb on Thermal Stability and Crystallization Kinetics of GeS2–Sb2S3–PbS Glasses

“…Unfortunately, compared with germanium single crystals, ChGs suffer fundamental mechanical and thermal weaknesses due to their weaker chemical bonds and network rigidities. The mechanical strength as well as thermal shock resistance can be improved when glass is converted to glass‐ceramics by introducing microcrystals into the glass matrix . Nonetheless, it is not easy to prepare proper chalcogenide glass‐ceramics retaining excellent infrared transmitting properties, because the introduced microcrystals lead to dramatic reduction in infrared transmittance due to significant infrared light scattering with these crystals.…”

“…The mechanical strength as well as thermal shock resistance can be improved when glass is converted to glass-ceramics by introducing microcrystals into the glass matrix. [5][6][7] Nonetheless, it is not easy to prepare proper chalcogenide glass-ceramics retaining excellent infrared transmitting properties, because the introduced microcrystals lead to dramatic reduction in infrared transmittance due to significant infrared light scattering with these crystals. To improve infrared transmittance of chalcogenide glass-ceramics, a controlled crystallization heat treatment scheme was developed by Zhang et al 8 In controlled crystallization, the nucleation and crystal growth stages are separated and hence crystal sizes can be controlled within the nanometer to sub-micrometer length scales, thus significantly reducing transmittance loss due to light scattering.…”