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Sintering in Active Nickel Oxide
Author(s) -
BROWN R. A.
Publication year - 1965
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.1151-2916.1965.tb14693.x
Subject(s) - nickel , sintering , nickel oxide , calcination , oxalate , arrhenius equation , oxide , materials science , decomposition , oxygen , metallurgy , inorganic chemistry , activation energy , chemistry , catalysis , biochemistry , organic chemistry
Decomposition of nickel oxalate at 450°C in a stream of oxygen for 0.5 hr produced very reactive nickel oxide. Sintering rates in this material were faster (by factors up to 40) than in unreactive nickel oxide, produced by calcining nickel oxalate at 900°C for 5 hr in air. The Arrhenius activation energies for densification were significantly different in the two systems. Preliminary studies confirmed that normal grain growth, which follows a law of the form G 3 = kt , occurs in nickel oxide.