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VISCOSITY OF RECENT CONTAINER GLASS *
Author(s) -
Robinson Howard A.,
Peterson Charles A.
Publication year - 1944
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.1151-2916.1944.tb14880.x
Subject(s) - viscometer , viscosity , mineralogy , materials science , calibration , thermodynamics , atmospheric temperature range , composite material , ubbelohde viscometer , analytical chemistry (journal) , optics , chemistry , mathematics , physics , chromatography , statistics
A bstract A high‐temperature, concentric cylinder viscometer has been constructed and calibrated. The calibration checks within 1% that obtained by Lillie for a similar apparatus and provides further evidence of the high degree of reliability of this type of measurement. The contention of Washburn and Shelton that the calibration in such instruments is a function of the viscosity is shown to be false. Because four independent investigations have been unable to check this contention, it may now be regarded as spurious. A medium temperature‐range fiber viscometer for measuring the viscosity of glass in the annealing range has also been constructed. It is shown that the Fulcher equation, log η=− A + B / T − T 0 , fits the data obtained on the two instruments to within 0.5% for commercial soda‐lime glasses. Complete viscosity data as a function of temperature are given for sixteen commercial container glasses, and the analyses are also included. These glasses show a wide range of viscosity.