Abstract
ALTHOUGH moisture expansion of ceramic bodies has been studied by many investigators its cause is still not known with certainty. The hydratable materials that play a part may be anhydrous clay minerals1,2, γ-alumina3, amorphous silica (silica gel)4,5, alumino-silicic acid gel5 and permutites, zeolites or glass1–3,6,7. These are all amorphous (or poorly crystalline) materials that might be expected to appear at some stage in the firing of a clay body. In the past, studies on natural materials have been complicated by complex mineralogy and/or the presence of impurities, and it has been difficult to assess the influence of each component on moisture expansion. To overcome this we have studied moisture expansion using pure co-precipitated and mixed gels of silica and alumina and some to which an impurity of sodium oxide has been added. The work forms part of an investigation into the nature and cause of the permanent moisture expansion of ceramic bodies being carried out in this Division.
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DEMEDIUK, T., COLE, W. A New Approach to the Investigation of the Cause of Moisture Expansion of Ceramic Bodies. Nature 182, 1223–1224 (1958). https://doi.org/10.1038/1821223a0
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DOI: https://doi.org/10.1038/1821223a0
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