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Effect of Rare‐Earth Additives on Electromechanical Properties of Modified Lead Titanate Ceramics
Author(s) -
Suwannasiri Thitima,
Safari Ahmad
Publication year - 1993
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.1151-2916.1993.tb06623.x
Subject(s) - materials science , lead titanate , poling , ceramic , anisotropy , titanate , rare earth , dielectric , mineralogy , lattice constant , crystallite , lattice (music) , analytical chemistry (journal) , ferroelectricity , composite material , metallurgy , chemistry , optics , physics , optoelectronics , chromatography , acoustics , diffraction
The influence of rare‐earth additives, such as La, Nd, Sm, and Gd, and poling conditions on the electromechanical properties of (Pb 1−3 x /2 Ln x )(Ti 0.98 Mn 0.02 )O 3 compositions, x = 0.04–0.12, were investigated. The type and amount of additive were found to affect the lattice anisotropy, dielectric constant, and electromechanical properties. A large electromechanical anisotropy ( k t / k p ) could be obtained in 10 mol% Sm‐modified and 8 mol% Gd‐modified lead titanate ceramics, and seemed to correlate to a low Poisson's ratio.