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Erschienen in:
2007 | OriginalPaper | Buchkapitel
The Topley–Smith Effect
Erschienen in: Thermal Decomposition of Solids and Melts
Verlag: Springer Netherlands
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An abnormal change of the dehydration rate,
J
, of crystalline hydrates with an increase of water vapour pressure,
P
w, was discovered by Topley and Smith (T–S) in 1931 [1] in their studies of the dehydration rate of MnC2O4 2H2O. In contrast to the expected monotonous decrease of the rate with increasing
P
w, the dehydration rate, on reaching a certain critical pressure (about 0.1 Torr), begins to increase, passes through a maximum (about 1 Torr), and then decreases (Fig. 7.1).