%0 Journal Article
%A Starodub, K.
%A Wu, G.
%A Yazhenskikh, E.
%A Müller, Michael
%A Khvan, A.
%A Kondratiev, A.
%T An Avramov-based Viscosity Model for the SiO2-Al2O3-Na2O-K2O System in a Wide Temperature Range
%J Ceramics international / Ci news
%V 45
%N 9
%@ 0272-8842
%C Faenza
%I Ceramurgia73399
%M FZJ-2019-03663
%P 12169 - 12181
%D 2019
%X A modified Avramov equation is employed to describe the viscosity of silicate melts in the SiO2-Al2O3-Na2O-K2O system and its subsystems with associate species obtained from thermodynamic description and used as structural units. Two modifications to the Avramov equation are proposed: i) a stronger dependence of viscosity input of each structural unit on its concentration ii) the “fragility” parameter dependent on the melt composition at a given point. The model describes the viscosity reasonably well for most of the experimental data in the wide compositional range and in a temperature range from fully liquid to supercooled melts. Approaches to further improve the model are discussed.
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000466253500132
%R 10.1016/j.ceramint.2019.03.121
%U https://juser.fz-juelich.de/record/863657