Abstract
Transformation range viscosity was measured for multicomponent fluorozirconate glasses in the system 0.56ZrF4·(0.34‐x)BaF2·0.06LaF3·0.04AlF3·xRF, where R =Li, Na, K, or Cs. The results indicate that the viscosity of these glasses can be described by an Arrhenius equation over the viscosity range from 107 to 1012 Pa·s with an activation energy of the order of 650 to 850 kJ. In general, the effects of alkali fluoride additions on the viscosity of fluorozirconate glasses are comparable to those in silicate systems.
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