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RATE OF DRYING OF A PLASTIC PORCELAIN MASS DUE TO REDUCED PRESSURE AND HEAT 1
Author(s) -
Navias Louis
Publication year - 1929
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.1151-2916.1929.tb18053.x
Subject(s) - logarithm , relative humidity , materials science , humidity , composite material , line (geometry) , atmospheric pressure , thermodynamics , analytical chemistry (journal) , mineralogy , chemistry , mathematics , chromatography , geometry , meteorology , physics , mathematical analysis
Experiments in drying plastic porcelain masses are performed using reduced pressures of 0.7, 5, 15, and 36 cm., with surrounding temperatures of 23, 50, and 65°C. Plotting the logarithm of the loss of weight against the logarithm of time, straight‐line relationships are found to exist for the drying rate. With the lowest pressure a single slope is found, whereas with the three higher pressures there are two slopes to each curve. The lowering of the temperature of the whole mass with lowering in pressure is shown. Effect of shape of specimen and humidity of air on rate of drying is discussed.