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Effects of Water Vapor on the Initial Sintering of Calcia
Author(s) -
PETERSEN RONALD O.,
CUTLER IVAN B.
Publication year - 1968
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.1151-2916.1968.tb11821.x
Subject(s) - sintering , water vapor , diffusion , kinetics , enthalpy , analytical chemistry (journal) , calcium oxide , materials science , volume (thermodynamics) , chemistry , vapor pressure , mineralogy , thermodynamics , metallurgy , chromatography , physics , organic chemistry , quantum mechanics
The effect of water vapor on the initial sintering kinetics of calcium oxide was studied at 920” to 1123°C. In the range of P HI( ) from 8 × 10W 4 to 487 mm Hg, water vapor increased the rate of sintering. The initial sintering kinetics followed the model for volume diffusion with calculated diffusion coefficients dependent on P H2O , which varied from (P, H2O ) 1/2 at pressures between 6.1 and 50 mm Hg to (PI H2O ) 1/2 at pressures between 244 and 487 mm Hg. The activation enthalpy varied from 123 ± 7 kcal/mole when P H2O = 0.04 mm Hg to 103 ± 3.5 kcal/mole at P H2O 243.9 mm Hg.