Login for students

Login for employees

Publication detail

Kinetic Processes in Amorphous Materials Revealed by Thermal Analysis: Application to Glassy Selenium
Year: 2019
Type of publication: článek v odborném periodiku
Name of source: Molecules
Publisher name: MDPI
Place: BASEL
Page from-to: "2725-1"-"2725-15"
Titles:
Language Name Abstract Keywords
cze Kinetické procesy v amorfních materiálech sledované pomocí termální analýzy: Aplikace na amorfní selen Je očekáváno, že viskózní tok ovlivňuje kinetické procesy v podchlazených kapalinách takové, jako jsou strukturní relaxace a krystalizace. Tyto procesy jsou významně ovlivněny přípravou materiálu rychlým chlazením. V tomto článku je diskutována aktivační energie viskózního toku s ohledem na aktivační energie procesů krystalového růstu a strukturní relaxace. sklo; strukturní relaxace; krystalizace; viskozita; termální analýza
eng Kinetic Processes in Amorphous Materials Revealed by Thermal Analysis: Application to Glassy Selenium It is expected that viscous flow is affecting the kinetic processes in a supercooled liquid, such as the structural relaxation and the crystallization kinetics. These processes significantly influence the behavior of glass being prepared by quenching. In this paper, the activation energy of viscous flow is discussed with respect to the activation energy of crystal growth and the structural relaxation of glassy selenium. Differential scanning calorimetry (DSC), thermomechanical analysis (TMA) and hot-stage infrared microscopy were used. It is shown that the activation energy of structural relaxation corresponds to that of the viscous flow at the lowest value of the glass transition temperature obtained within the commonly achievable time scale. The temperature-dependent activation energy of crystal growth, data obtained by isothermal and non-isothermal DSC and TMA experiments, as well as direct microscopic measurements, follows nearly the same dependence as the activation energy of viscous flow, taking into account viscosity and crystal growth rate decoupling due to the departure from Stokes-Einstein behavior. glass; structural relaxation; crystallization; viscosity; thermal analysis

Departments

Other Parts

Map

en.mapy.cz

Services

Popular Links

© 2023 University of Pardubice, Studentská 95, 532 10 Pardubice 2
Phone: +420 466 036 111, 466 036 112, 466 036 113
Webmaster, RSS
Data box ID: f5vj9hu
Accessibility Statement
CC BY-NC-ND 4.0Creative CommonsAttributionNonCommercialNoDerivatives