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EFFECT OF EXCHANGEABLE BASES ON DRYING OF CLAY BODIES *
Author(s) -
Sullivan John D.,
Graham Robert P.
Publication year - 1940
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.1151-2916.1940.tb14199.x
Subject(s) - shrinkage , relative humidity , humidity , chemistry , mineralogy , colloid , particle (ecology) , base (topology) , absorption (acoustics) , materials science , composite material , geology , meteorology , organic chemistry , mathematics , physics , mathematical analysis , oceanography
A bstract Studies were made at 100°F. and 50% relative humidity, 150°F. and 50% humidity, and 175°F. and 15% humidity to determine the effect of exchangeable bases present on the surface of the clay particles on drying rates. Drying may be considered to take place in two stages which are characterized by different rates. The first is rapid and is accompanied by shrinkage of the body, whereas the second is considerably slower and the shrinkage is slight. The drying rates of the base‐saturated bodies studied were nearly the same in the first stage, but in the second pronounced differences resulted. Sodium clays dried much more slowly than the other bodies investigated. At 175°F. and 15% humidity, H clay dried the most rapidly. A rational explanation of the phenomena, based on the colloidal nature of the clay particle and on the unfired absorption of the bodies, is given.