On the approximate estimation of the surface tension of chalcogenide glass melts

Abstract

The surface tension coefficients of chalcogenide glasses are estimated. It is demonstrated that, to a first approximation, the results of the existing techniques for estimating the surface tension coefficients of chalcogenide glasses are in satisfactory agreement. The energies of formation of fluctuation microvoids in chalcogenide glasses according to the calculations from data on the surface tension and the density agree with the results obtained by the conventional method from data on the glass transition temperature and the fraction of the fluctuation free volume.

Stimulated Surface Relief Erasing in Amorphous As‐Se Layers: Thermal‐ and Light Induced Effects

“…The kinetics of thermal erasing (flattening) of SRGs (without light illumination) at various temperatures in the range 378–408 K was measured. According to the theory of capillary SRG flattening (which was modified for thin films in ref. ), the grating amplitude, h , should exponentially decrease with time where h 0 is initial amplitude, and κ is the flattening constant, which depends on the mechanism of flattening.…”

“…Here, γ is the surface tension (we accepted γ = 0.13 J m −2 ), Λ is the grating period, η is the dynamic viscosity and is a numerical coefficient, which depends on the ratio H / Λ . With H = 2.3 μm (layer thickness), C = 1 for grating with Λ = 3.5 μm and C = 0.55 for Λ = 15 μm.…”

High index-contrast all-solid photonic crystal fibers by pressure-assisted melt infiltration of silica matrices

“…For the As 2 S 3 melt, the surface tension is expected in the range of 0.059 to 0.168 N/m [34]. Consequently, Eq.…”

Preparation and characterization of microstructured silica holey fibers filled with high-index glasses

“…The literature values of the surface tension are 0.059 to 0.168 N/m for arsenic sulphide and 0.050 to 0.204 N/m for arsenic selenide [10]. The contact angle was measured to be approximately 95 • , resulting in a negative capillary force which is then directed out of the capillary.…”

“…where g = 9.81 m/s 2 , ρ is the density of the liquid (ρ As2S3 = 3204 kg/m 3 , ρ As2Se3 = 4551 kg/m 3 [10]) and L 0 = L(0) is the filling length at t = 0. Here we made the simplification that the depth of immersion of the capillary equals zero.…”