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Causes of Instability and Aging of Piezoelectric Power Ceramics
Author(s) -
Eyraud Lucien,
Gonnard Paul,
Claudel Bernard
Publication year - 1990
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.1151-2916.1990.tb05234.x
Subject(s) - instability , piezoelectricity , ceramic , lattice (music) , materials science , electron , chemical physics , condensed matter physics , mineralogy , nanotechnology , chemistry , composite material , physics , mechanics , acoustics , quantum mechanics
A simple model of substituted perovskites of the PZT type involving the presence of centers which can act both as donors and acceptors provides an explanation of the cancellation of space charge density (ρ=−div ) in polarized ceramics. A cause of instability can be avoided by incorporating substitutions in the cation lattice to form these centers and lock them in position. These substitutions insure the nonconductive state of the material although they allow a short‐range electron transfer between the centers.