Viscosity and kinetic phenomena in glass-forming systems
Provider: Grantová agentura ČR
Programme: Standardní projekty
Implementation period: 01.01.16 - 31.12.18
Workplace:
Fakulta chemicko-technologická - Katedra fyzikální chemie
Investigator: Málek JiříTeam member: Shánělová Jana | Košťál Petr | Barták Jaroslav | Svoboda Roman
Description:
Thermo-physical behavior of glass-forming liquids, i.e. the crystallization and vitrification processes, are to a large extent determined by shear viscosity. Previous studies have demonstrated that isothermal crystal growth rate corrected for thermodynamic driving force exhibits weaker temperature dependence than viscosity (this decoupling was observed mainly for oxides and small organic molecules). One of the main project aims is to extend this research to chalcogenide glass-formers and, based on the combined microscopic and advanced calorimetric studies of the nucleation processes, contribute to the overall explanation of this phenomenon. The second important project goal is to study the vitrification and structural relaxation processes and to correlate the obtained results with the viscosity behavior of the given materials. The insight gained from this research will lead to improved control of glass formation and microstructure development during controlled vitrification and crystallization. This is important for further development of new glassy and glass-crystalline materials.
Thermo-physical behavior of glass-forming liquids, i.e. the crystallization and vitrification processes, are to a large extent determined by shear viscosity. Previous studies have demonstrated that isothermal crystal growth rate corrected for thermodynamic driving force exhibits weaker temperature dependence than viscosity (this decoupling was observed mainly for oxides and small organic molecules). One of the main project aims is to extend this research to chalcogenide glass-formers and, based on the combined microscopic and advanced calorimetric studies of the nucleation processes, contribute to the overall explanation of this phenomenon. The second important project goal is to study the vitrification and structural relaxation processes and to correlate the obtained results with the viscosity behavior of the given materials. The insight gained from this research will lead to improved control of glass formation and microstructure development during controlled vitrification and crystallization. This is important for further development of new glassy and glass-crystalline materials.
