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Apparent Activation Energy for the Densification of a Commercially Available Granulated Zirconia Powder
Author(s) -
BernardGranger Guillaume,
Guizard Christian
Publication year - 2007
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.1551-2916.2006.01415.x
Subject(s) - dilatometer , activation energy , cubic zirconia , materials science , relative density , sintering , energy density , composite material , mineralogy , chemistry , ceramic , thermal expansion , physics , theoretical physics
Sintering in air of a commercially available granulated zirconia powder has been investigated using vertical dilatometer tests. Using several heating rates and the formalism of the constant rate of heating method, it has been possible to determine the apparent activation energy for the mechanism controlling densification, for different values of the relative density. It is shown that the apparent activation energy does not have a single value but depends directly on the relative density.