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

Abstract

Effect of three aging conditions, in dark, in light, and in light synchronously with load (with load), on the mechanical properties of Te 2 As 3 Se 5 (TAS) glass have been investigated through a series of tensile strength (r) measurements. Relief of r in three aging conditions could be related to structural relaxation. And the relaxation time almost 1.5 months is well in agreement with our previous results of calorimetric and mechanical properties. Compared with dark condition, photoinduced effect makes the relief of r more obvious, but load effect makes the r to be stronger in direction of testing. Thus, we suggest that, to keep fibers with good r, they should be stored in dark and with load.

Stretched Exponential Relaxation of Glasses at Low Temperature

“…Understanding and predicting the relaxation dynamics of glasses has important practical applications, e.g. for optical fibers [10], substrate glass for liquid crystal displays [11], and chemically strengthened cover glass for smartphones and tablets [12].…”

Effect of physical aging on fracture behavior of Te2As3Se5 glass fibers

“…in dark and in light, in one way which can be expressed as: Figure 3. Furthermore details about variation about the ı during physical aging in the two conditions can be found in our previous paper [13].…”

“…Structure of TAS glasses are based on a two dimensional glass network where atomic As is bridged by chalcogen chain fragments, and introduction of tellurium in TAS glasses induces breaking of chalcogen chain and formation of AsSe 3-x Te x pyramidal units [10][11][12]. Our previous researches have reported that the surface quality of TAS fibers, physical aging conditions, such as light, load and air, and glass structural relaxation, have effect on the ı [5,7,13]. However, so far for TAS glass fibers there is little report about correlation between the ı and Į or r m under different aging conditions.…”

Progress in preparation and applications of Te-As-Se chalcogenide glasses and fibers

“…Until now, ChG fibers such as As-S, As-Se, Ge-As-Se, Ge-Ga-Sb-S (Se), etc are successfully fabricated. Among numerous ChG glasses, TAS glasses have been widely investigated since their excellent thermal stability for drawing fibers and broad transmittance in the MIR [16][17][18]. TAS fibers have low transmission losses in the 2-18 μm bands, especially in the range of 2-12 μm, which is an ideal medium for detecting fingerprint region molecules [19,20].…”