Ni-doped Ca2Al2SiO7 glass microspheres

Investigator: M. Majerová

 

Aluminous glasses are interesting in terms of their basic structure. Alumina glasses have excellent mechanical properties, excellent corrosion resistance, show better light and heat resistance and better light conductivity than conventional silicate glasses. Another important feature of these glasses is that they are permeable to ultraviolet, visible and infrared radiation and can therefore be used as host matrices for optically active substances. By doping with suitable rare earth metal elements and transition elements with photoluminescent properties, they are used as phosphors in semiconductor lasers, optical cables and LEDs. The crystallization kinetics of Ni-doped gelenite and ytterobaluminous glass microspheres were studied. The Johnson-Mehl-Avrami-Kolgomorov (JMAK) model was used to describe the crystallization process. It has been found that in the case of Ni-doped gelenite microspheres, one-dimensional crystal growth is the dominant process. In the case of yterbitol-aluminum microspheres, two exothermic effects were revealed, which belong to the crystallization of the Yb3Al5O12 phase. Using the JMAK model, the values ​​of kinetic parameters (frequency factor (A), apparent activation energy (Eapp), Avrami coefficient (m) were determined.

 

Related projects: Preparation and study of properties of precursors for the development of nanomaterials based on metal oxides, project registration number: AI5 / TT / 1170 (project with Belgium) and VEGA 2/0164/17.

 

The result was achieved in cooperation with the VITRUM LAUGARICIO Glass Research Competence Center and the FunGlass Center for Functional and Surface Functionalized Glass, Alexander Dubček University of Trenčín in Trenčín and the Sol-gel Center for Research on Inorganic Powders and Thin films Synthesis, Department of Inorganic and Physical Chemistry, Ghent University, Belgium.

 

Publications:

 

  • MAJEROVÁ, Melinda – PRNOVÁ, A. – PLŠKO, A. – HRUŠKA, B. – VALÚCHOVÁ, J. – KRAXNER, J. – BRUNEEL, E. – DE BUYSSER, K. – GALUSEK, D. Crystallization kinetics of Ni‑doped Ca2Al2SiO7 glass microspheres. In Journal of Thermal Analysis and Calorimetry, 2020, vol. 142, no. 5, p. 2111–2121. ISSN 1388-6150. (2.731-IF2019) Q2
  • PRNOVÁ, A. – PLŠKO, A. – VALÚCHOVÁ, J. – KLEMENT, R. – CHROMČÍKOVÁ, M. – MUTLU, N. – MAJEROVÁ, Melinda – BRUNEEL, E. – GALUSEK, D. Crystallization kinetics of binary Yb2O3–Al2O3 glass. In Journal of Thermal Analysis and Calorimetry, 2020, vol. 142, no. 5, p. 2141–2148. ISSN 1388-6150. (2.731-IF2019) Q2