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LOW‐TEMPERATURE VISCOSITY OF ALKALI SILICATE GLASSES *
Author(s) -
Poole James P.
Publication year - 1949
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.1151-2916.1949.tb18952.x
Subject(s) - alkali metal , silicate , potassium silicate , viscosity , potassium , atmospheric temperature range , sodium , annealing (glass) , mineralogy , sodium silicate , silicate glass , analytical chemistry (journal) , materials science , chemistry , inorganic chemistry , thermodynamics , metallurgy , composite material , chromatography , organic chemistry , physics
A bstract Using an improved technique, precision measurements of viscosities in the annealing range of temperature were made on sodium, potassium, and sodium‐potassium silicate glasses containing from 10 to 40 mol % alkali. The viscosities of certain of those glasses that contain both Na 2 O and K 2 O reach minima, and the temperature coefficients of viscosity, which are nearly equal for the Na 2 O and the K 2 O glasses, become considerably smaller. These conditions may explain the practical advantages of certain glasses containing both Na 2 O and K 2 O.