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Transformation Range Viscosity of Fluorozirconate Glasses
Author(s) -
Shelby James E.,
Pantano Carlo G.,
Tesar Aleta A.
Publication year - 1984
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1984.tb19183.x
Subject(s) - viscosity , arrhenius equation , activation energy , silicate , thermodynamics , atmospheric temperature range , materials science , mineralogy , alkali metal , fluoride , range (aeronautics) , relative viscosity , analytical chemistry (journal) , chemistry , inorganic chemistry , composite material , chromatography , physics , organic chemistry
Transformation range viscosity was measured for multicomponent fluorozirconate glasses in the system 0.56ZrF 4 ·(0.34‐x)BaF 2 ·0.06LaF 3 ·0.04AlF 3 ·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 10 7 to 10 12 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.