Premium
Sintering of ZnO: I, Densification and Grain Growth *
Author(s) -
GUPTA T. K.,
COBLE R. L.
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.tb15679.x
Subject(s) - thermal diffusivity , sintering , lattice diffusion coefficient , zinc , materials science , pellets , grain size , oxygen , diffusion , grain growth , effective diffusion coefficient , grain boundary diffusion coefficient , metallurgy , oxide , mineralogy , grain boundary , analytical chemistry (journal) , thermodynamics , composite material , chemistry , microstructure , medicine , physics , organic chemistry , radiology , chromatography , magnetic resonance imaging
Densification and grain growth rates at the intermediate stage of the sintering of pressed zinc oxide pellets were measured in air and oxygen. Application of a lattice diffusion model to the results gave calculated diffusion coefficients in good agreement with directly measured diffusion coefficients for zinc. The change of atmosphere from air to oxygen resulted in lowering of grain size and calculated diffusivity; the diffusion decrease is consistent with lattice diffusivity of zinc occurring by an interstitial mechanism. The results can be expressed by the relations:in air, andin oxygen, from 900° to 100°C.