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NOTES ON MOISTURE EXPANSION *
Author(s) -
Thiemecke H.
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.tb14866.x
Subject(s) - crazing , pyrophyllite , moisture , composite material , autoclave , mineralogy , materials science , geology , metallurgy , polymer
A bstract Moisture‐expansion determinations were made over a period of more than three years on bisque and glazed specimens of two types of semivitreous bodies having approximately the same absorption which were exposed to four different atmospheric conditions. The data indicate the cone 0 tale‐pyrophyllite body to expand less under all conditions of exposure than the cone 9 clay‐flint‐feldspar body. Glazed specimens of both bodies expanded more than the bisque specimens and a possible explanation is given. From mathematical considerations, a three‐year storage period appears to be sufficient to permit moisture expansion that closely approaches the ultimate which might be expected in the types of bodies investigated. The autoclave treatment gave the highest expansion values and should serve as an index of the service performance as to delayed crazing of ware so tested.