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Effect of lithium doping on the glass transition behavior of the Bioglass 45S5
Authors: Chromcikova Maria | Svoboda Roman | Pecusova Beata | Hruska Branislav | Hujova Miroslava | Nowicka Aleksandra | Liska Marek
Year: 2022
Type of publication: článek v odborném periodiku
Name of source: Journal of Non-Crystalline Solids
Publisher name: Elsevier Science BV
Place: Amsterdam
Page from-to: "121797-1"-"121797-7"
Titles:
Language Name Abstract Keywords
cze Efekt litia na skelně přechodové chování bioskla 45S5 Metody DSC, TMA a Ramanovy spektroskopie byly použity pro studium efektů Li2O a P2O5 na strukturní relaxaci Li-dopovaného bioskla 45S5. TNM model byl použit k popisu strukturní relaxace v oblasti skelného přechodu. TNM paramtery, teplota skelného přechodu a koefficient teplotní expanze nevykázaly žádnou významnou korelaci se složením syntetizovaných skel. strukturní relaxace; skelný přechod; DSC; Li2O; 45S5 biosklo
eng Effect of lithium doping on the glass transition behavior of the Bioglass 45S5 Differential scanning calorimetry, thermomechanical analysis and Raman spectroscopy were used to study the role of the Li2O and P2O5 oxides on the structural relaxation phenomena in the Li-doped 45S5 Bioglass. The glass transition behavior was found to be similar for the enthalpy and volume manifestations of the relaxation motions. The Tool-Narayanaswamy-Moynihan (TNM) model was applied. An improved simulation-comparative methodology was used to determine the model relaxation parameters. The TNM model parameters and the selected glass transition characteristics (the glass transition temperature and the coefficients of thermal expansion) showed no statistically significant correlation with the particular elements present in the synthesized glasses. Hence, the information about the glasses composition was used to calculate the theoretical amounts of the Q(Si)(n) species in the Li-doped 45S5 glasses. It was found that practically all explored physico-chemical quantities related to the glass transition kinetics show a correlation with the content of Q(Si)(2) species that are responsible for the formation of the chain-like structures in the present glasses. structural relaxation; glass transition; DSC; Li2O; 45S5 bioglass

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