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Initial Sintering of MnXO‐Al 2 O 3
Author(s) -
KESKI J. R.,
CUTLER I. 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.tb11915.x
Subject(s) - sintering , isothermal process , activation energy , materials science , diffusion , impurity , shrinkage , limiting , oxygen , partial pressure , manganese , oxide , volume (thermodynamics) , kinetics , mineralogy , metallurgy , analytical chemistry (journal) , composite material , thermodynamics , chemistry , chromatography , mechanical engineering , physics , organic chemistry , quantum mechanics , engineering
Effects of manganese oxide on the initial sintering kinetics of compacts of 5‐μ diameter alumina were studied by isothermal shrinkage measurements from 1450° to 1650°C. The observed rates were characterized by assuming a volume‐diffusion mechanism. Variations in sintering rate with both oxygen partial pressure in the furnace and impurity concentration, as well as the observed activation energy, indicated oxygen‐ion diffusion was the rate‐limiting step during densification.