University of Pardubice Faculty of Chemical Technology

University

Employees
|
Students
Česky

Publication detail

Crystal growth in chalcogenide glass-formes prepared in different forms and its relation to viscosity and diffusion

Authors: Barták Jaroslav | Vaculík David | Včeláková Michaela

Year: 2024

Type of publication: ostatní - přednáška nebo poster

Page from-to: nestránkováno

Titles:

Language	Name	Abstract	Keywords
eng	Crystal growth in chalcogenide glass-formes prepared in different forms and its relation to viscosity and diffusion	This work focuses on crystal growth in Ge25Se75 bulk glasses and thin films prepared by thermal evaporation and solution processing. Crystal growth data were obtained using infrared microscopy measurements, showing a change in crystal morphology within the broad studied temperature region (250 – 550 ◦C). Nevertheless, a single crystal growth model could describe the crystal growth rates. The combination of viscosity and crystal growth data provides an extensive collection essential for crystal growth description in a wide temperature range. The found crystal growth model describing the experimental data provides information about the size of structural units incorporated into the growing crystals. The structural unit size is then used for the estimation of self-diffusion coefficients (D) that show a similar relation with crystal growth rates (u) as was found in molecular glasses (u ≈ Dˆ0.87).	Crystal growth; chalcogenide glass; viscosity; diffusion