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The Effect of Atmosphere on the Sintering of Fe 3 O 4 and Fe 2 O 3 Powders at Low Temperatures
Author(s) -
HAYES P. C.
Publication year - 1980
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.1151-2916.1980.tb10197.x
Subject(s) - sintering , hematite , magnetite , diffusion , materials science , kinetics , analytical chemistry (journal) , oxygen , reducing atmosphere , surface diffusion , mineralogy , chemistry , metallurgy , thermodynamics , physics , organic chemistry , chromatography , adsorption , quantum mechanics
The sintering kinetics of submicrometer Fe 3 O 4 and Fe 2 O 3 powders were investigated at 300° to 500°C. Using measurements of the rate of reduction of surface area, the coefficients of surface diffusion on the oxides are estimated for a range of oxygen partial pressures. The surface‐diffusion coefficients appear to be independent of P O2 for magnetite and only slightly dependent on P O2 for hematite.