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Leveling of Vitreous Surfaces
Author(s) -
RHODES JAMES F.,
KING BURNHAM W.
Publication year - 1970
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.1151-2916.1970.tb12054.x
Subject(s) - surface tension , viscosity , materials science , coating , composite material , tension (geology) , surface (topology) , optics , mineralogy , geometry , thermodynamics , mathematics , chemistry , physics , ultimate tensile strength
A model was developed relating the variables involved in the leveling of an irregularity on a vitreous surface (such as a dry‐process porcelain enamel) during heating. The variables are: (1) surface tension, (2) viscosity, (3) geometry of the irregularity, (4) coating thickness, and (5) firing time. The equation derived was:where h 0 = height of irregularity at t = 0, h = height of irregularity at t = t, t = time, y = surface tension, X = average coating thickness, ν= viscosity, and a = half width of the irregularity at the mean thickness. The derived relation was verified using a coating of a simple glass having known surface tension and viscosity.